Forgot the necessary cleanup of old jars in windows NSIS version.

management for items.

ATCS_JAR.jardesc

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<jardesc>
+    <jar path="ATContentStudio/ATCS_v0.5.3.jar"/>
+    <options buildIfNeeded="true" compress="true" descriptionLocation="/ATContentStudio/ATCS_JAR.jardesc" exportErrors="true" exportWarnings="true" includeDirectoryEntries="false" overwrite="false" saveDescription="true" storeRefactorings="false" useSourceFolders="false"/>
+    <storedRefactorings deprecationInfo="true" structuralOnly="false"/>
+    <selectedProjects/>
+    <manifest generateManifest="true" manifestLocation="" manifestVersion="1.0" reuseManifest="false" saveManifest="false" usesManifest="true">
+        <sealing sealJar="false">
+            <packagesToSeal/>
+            <packagesToUnSeal/>
+        </sealing>
+    </manifest>
+    <selectedElements exportClassFiles="true" exportJavaFiles="true" exportOutputFolder="false">
+        <javaElement handleIdentifier="=ATContentStudio/res"/>
+        <javaElement handleIdentifier="=ATContentStudio/src"/>
+        <javaElement handleIdentifier="=ATContentStudio/hacked-libtiled"/>
+    </selectedElements>
+</jardesc>

packaging/Linux/ATCS/ATCS.cmd

@@ -1 +1,20 @@
-start "" "javaw.exe" -Xmx512M -cp "lib\ATCS_v0.5.1.jar;lib\jide-oss.jar;lib\ui.jar;lib\junit-4.10.jar;lib\json_simple-1.1.jar;lib\rsyntaxtextarea.jar;lib\prefuse.jar;lib\AndorsTrainer_v0.1.3.jar;lib\bsh-2.0b4.jar" com.gpl.rpg.atcontentstudio.ATContentStudio
+@echo off
+
+set "ATCS_DIR=%~dp0"
+set "MAX_MEM=512M"
+set "CP=%ATCS_DIR%lib\*"
+set "JAVA=javaw.exe"
+set "JAVA_OPTS="
+set "ENV_FILE=%ATCS_DIR%ATCS.env.bat"
+set "MAIN_CLASS=com.gpl.rpg.atcontentstudio.ATContentStudio"
+
+if exist "%ENV_FILE%" (
+  call "%ENV_FILE%"
+) else (
+  echo REM set "MAX_MEM=%MAX_MEM%">"%ENV_FILE%"
+  echo REM set "JAVA=%JAVA%">>"%ENV_FILE%"
+  echo REM set "JAVA_OPTS=%JAVA_OPTS%">>"%ENV_FILE%"
+  echo.>>"%ENV_FILE%"
+)
+
+start "" "%JAVA%" %JAVA_OPTS% -Xmx%MAX_MEM% -cp "%CP%" %MAIN_CLASS%

packaging/Linux/ATCS/ATCS.sh

@@ -1,2 +1,22 @@
 #!/bin/bash
-java -Xmx512M -cp lib/AndorsTrainer_v0.1.3.jar:lib/ATCS_v0.5.1.jar:lib/prefuse.jar:lib/json_simple-1.1.jar:lib/jide-oss.jar:lib/ui.jar:lib/junit-4.10.jar:lib/rsyntaxtextarea.jar:lib/bsh-2.0b4.jar com.gpl.rpg.atcontentstudio.ATContentStudio
+ATCS_DIR=$(dirname $(readlink -f "$0" || greadlink -f "$0" || stat -f "$0"))
+MAX_MEM=512M
+CP=$(find ${ATCS_DIR}/lib/ -name '*.jar' | paste -sd: -)
+JAVA=java
+JAVA_OPTS=
+ENV_FILE=${ATCS_DIR}/ATCS.env
+MAIN_CLASS=com.gpl.rpg.atcontentstudio.ATContentStudio
+
+if [ -f ${ENV_FILE} ]
+then
+  source ${ENV_FILE}
+else
+  echo "#MAX_MEM=${MAX_MEM}" > ${ENV_FILE}
+  echo "#JAVA=${JAVA}" >> ${ENV_FILE}
+  echo "#JAVA_OPTS=${JAVA_OPTS}" >> ${ENV_FILE}
+  echo "" >> ${ENV_FILE}
+fi
+
+export ENV_FILE
+
+$JAVA ${JAVA_OPTS} -Xmx${MAX_MEM} -cp ${CP} ${MAIN_CLASS}

packaging/Windows/ATCS.cmd

@@ -1 +1,20 @@
-start "" "javaw.exe" -Xmx512M -cp "lib\ATCS_v0.5.0.jar;lib\jide-oss.jar;lib\ui.jar;lib\junit-4.10.jar;lib\json_simple-1.1.jar;lib\rsyntaxtextarea.jar;lib\prefuse.jar;lib\AndorsTrainer_v0.1.2.jar;lib\bsh-2.0b4.jar" com.gpl.rpg.atcontentstudio.ATContentStudio
+@echo off
+
+set "ATCS_DIR=%~dp0"
+set "MAX_MEM=512M"
+set "CP=%ATCS_DIR%lib\*"
+set "JAVA=javaw.exe"
+set "JAVA_OPTS="
+set "ENV_FILE=%ATCS_DIR%ATCS.env.bat"
+set "MAIN_CLASS=com.gpl.rpg.atcontentstudio.ATContentStudio"
+
+if exist "%ENV_FILE%" (
+  call "%ENV_FILE%"
+) else (
+  echo REM set "MAX_MEM=%MAX_MEM%">"%ENV_FILE%"
+  echo REM set "JAVA=%JAVA%">>"%ENV_FILE%"
+  echo REM set "JAVA_OPTS=%JAVA_OPTS%">>"%ENV_FILE%"
+  echo.>>"%ENV_FILE%"
+)
+
+start "" "%JAVA%" %JAVA_OPTS% -Xmx%MAX_MEM% -cp "%CP%" %MAIN_CLASS%

packaging/Windows/ATCS_Installer.nsi

@@ -1,7 +1,8 @@
 !include MUI2.nsh
 
-!define VERSION "0.5.1"
-!define JAVA_BIN "java"
+!define VERSION "0.5.3"
+!define TRAINER_VERSION "0.1.3"
+!define JAVA_BIN "javaw"
 
 Name "Andor's Trail Content Studio v${VERSION}"
 OutFile "ATCS_v${VERSION}_Setup.exe"
@@ -54,16 +55,37 @@ Section install
   SetOutPath $INSTDIR
   file "ATCS.ico"
   
+  Delete "$INSTDIR\lib\*"
+  
   Call GetJRE
   Pop $R0
   FileOpen $9 "ATCS.cmd" w
-  FileWrite $9 'start "" "$R0" -Xmx512M -cp "lib\AndorsTrainer_v0.1.1.jar;lib\jide-oss.jar;lib\ui.jar;lib\junit-4.10.jar;lib\json_simple-1.1.jar;lib\rsyntaxtextarea.jar;lib\prefuse.jar;lib\bsh-2.0b4.jar;lib\ATCS_v${VERSION}.jar" com.gpl.rpg.atcontentstudio.ATContentStudio'
+  FileWrite $9 '@echo off$\r$\n'
+  FileWrite $9 '$\r$\n'
+  FileWrite $9 'set "ATCS_DIR=%~dp0"$\r$\n'
+  FileWrite $9 'set "MAX_MEM=512M"$\r$\n'
+  FileWrite $9 'set "CP=%ATCS_DIR%lib\*"$\r$\n'
+  FileWrite $9 'set "JAVA=$R0"$\r$\n'
+  FileWrite $9 'set "JAVA_OPTS="$\r$\n'
+  FileWrite $9 'set "ENV_FILE=%ATCS_DIR%ATCS.env.bat"$\r$\n'
+  FileWrite $9 'set "MAIN_CLASS=com.gpl.rpg.atcontentstudio.ATContentStudio"$\r$\n'
+  FileWrite $9 '$\r$\n'
+  FileWrite $9 'if exist "%ENV_FILE%" ($\r$\n' 
+  FileWrite $9 '  call "%ENV_FILE%"$\r$\n'
+  FileWrite $9 ') else ($\r$\n'
+  FileWrite $9 '  echo REM set "MAX_MEM=%MAX_MEM%">"%ENV_FILE%"$\r$\n'
+  FileWrite $9 '  echo REM set "JAVA=%JAVA%">>"%ENV_FILE%"$\r$\n'
+  FileWrite $9 '  echo REM set "JAVA_OPTS=%JAVA_OPTS%">>"%ENV_FILE%"$\r$\n'
+  FileWrite $9 '  echo.>>"%ENV_FILE%"$\r$\n'
+  FileWrite $9 ')$\r$\n'
+  FileWrite $9 '$\r$\n'
+  FileWrite $9 'start "" "%JAVA%" %JAVA_OPTS% -Xmx%MAX_MEM% -cp "%CP%" %MAIN_CLASS%$\r$\n'
   FileClose $9
   
   SetOutPath "$INSTDIR\lib\"
   file "jide-oss.jar"
   file "ui.jar"
-  file "AndorsTrainer_v0.1.3.jar"
+  file "AndorsTrainer_v${TRAINER_VERSION}.jar"
   file "junit-4.10.jar"
   file "json_simple-1.1.jar"
   file "ATCS_v${VERSION}.jar"
@@ -93,7 +115,7 @@ Section uninstall
   Delete "$INSTDIR\lib\ui.jar"
   Delete "$INSTDIR\lib\junit-4.10.jar"
   Delete "$INSTDIR\lib\json_simple-1.1.jar"
-  Delete "$INSTDIR\lib\AndorsTrainer_v0.1.3.jar"
+  Delete "$INSTDIR\lib\AndorsTrainer_v${TRAINER_VERSION}.jar"
   Delete "$INSTDIR\lib\ATCS_v${VERSION}.jar"
   Delete "$INSTDIR\lib\rsyntaxtextarea.jar"
   Delete "$INSTDIR\lib\prefuse.jar"
@@ -101,6 +123,7 @@ Section uninstall
   RMDir "$INSTDIR\lib\"
   Delete "$INSTDIR\ATCS.ico"
   Delete "$INSTDIR\ATCS.cmd"
+  Delete "$INSTDIR\ATCS.env.bat"
   
   Delete "$INSTDIR\Uninstall.exe"
 

src/com/gpl/rpg/atcontentstudio/ATContentStudio.java

@@ -22,7 +22,7 @@ import com.gpl.rpg.atcontentstudio.ui.WorkspaceSelector;
 public class ATContentStudio {
 
 	public static final String APP_NAME = "Andor's Trail Content Studio";
-	public static final String APP_VERSION = "v0.5.1";
+	public static final String APP_VERSION = "v0.5.3";
 
 	public static boolean STARTED = false;
 	public static StudioFrame frame = null;

src/com/gpl/rpg/atcontentstudio/Notification.java

@@ -2,11 +2,12 @@ package com.gpl.rpg.atcontentstudio;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 public class Notification {
 
 	public static List<Notification> notifs = new ArrayList<Notification>();
-	private static List<NotificationListener> listeners = new ArrayList<NotificationListener>();
+	private static List<NotificationListener> listeners = new CopyOnWriteArrayList<NotificationListener>();
 	public static boolean showS = true, showI = true, showW = true, showE = true;
 	
 	static {

src/com/gpl/rpg/atcontentstudio/model/GameDataElement.java

@@ -4,10 +4,10 @@ import java.awt.Image;
 import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.Enumeration;
-import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.ConcurrentHashMap;
 
 import javax.swing.tree.TreeNode;
 
@@ -32,7 +32,7 @@ public abstract class GameDataElement implements ProjectTreeNode, Serializable {
 	public boolean writable = false;
 	
 	//List of objects whose transition to "linked" state made them point to this instance.
-	private Map<GameDataElement, Integer> backlinks = new LinkedHashMap<GameDataElement, Integer>();
+	private Map<GameDataElement, Integer> backlinks = new ConcurrentHashMap<GameDataElement, Integer>();
 
 	public String id = null;
 	

src/com/gpl/rpg/atcontentstudio/model/Project.java

@@ -665,6 +665,26 @@ public class Project implements ProjectTreeNode, Serializable {
 		return sheet;
 	}
 	
+	public int getSpritesheetCount() {
+		return createdContent.gameSprites.spritesheets.size() + baseContent.gameSprites.spritesheets.size();
+	}
+
+	public Spritesheet getSpritesheet(int index) {
+		if (index < createdContent.gameSprites.spritesheets.size()) {
+			return createdContent.gameSprites.spritesheets.get(index);
+		} else if (index < getQuestCount()){
+			return getSpritesheet(baseContent.gameSprites.spritesheets.get(index - createdContent.gameSprites.spritesheets.size()).id);
+		}
+		return null;
+	}
+	
+	public int getSpritesheetIndex(Spritesheet spritesheet) {
+		if (spritesheet.getDataType() == GameSource.Type.created) {
+			return createdContent.gameSprites.spritesheets.indexOf(spritesheet);
+		} else {
+			return createdContent.gameSprites.spritesheets.size() + baseContent.gameSprites.spritesheets.indexOf(baseContent.gameSprites.getSpritesheet(spritesheet.id));
+		}
+	}
 	
 	public TMXMap getMap(String id) {
 		TMXMap map = createdContent.gameMaps.getMap(id);
@@ -850,6 +870,34 @@ public class Project implements ProjectTreeNode, Serializable {
 		}
 	}
 	
+	/**
+	 * 
+	 * @param node. Before calling this method, make sure that no other map with the same id exist in either created or altered.
+	 */
+	public void createElement(TMXMap node) {
+		node.writable = true;
+		if (getMap(node.id) != null) {
+			GameDataElement existingNode = getMap(node.id);
+			for (GameDataElement backlink : existingNode.getBacklinks()) {
+				backlink.elementChanged(existingNode, node);
+			}
+			existingNode.getBacklinks().clear();
+			node.writable = true;
+			node.tmxFile = new File(alteredContent.baseFolder, node.tmxFile.getName());
+			node.parent = alteredContent.gameMaps;
+			alteredContent.gameMaps.addMap(node);
+			node.link();
+			node.state = GameDataElement.State.created;
+		} else {
+			node.tmxFile = new File(createdContent.baseFolder, node.tmxFile.getName());
+			node.parent = createdContent.gameMaps;
+			createdContent.gameMaps.addMap(node);
+			node.link();
+			node.state =  GameDataElement.State.created;
+		}
+		fireElementAdded(node, getNodeIndex(node));
+	}
+	
 
 	public void moveToCreated(JSONElement target) {
 		target.childrenRemoved(new ArrayList<ProjectTreeNode>());

src/com/gpl/rpg/atcontentstudio/model/Workspace.java

@@ -35,6 +35,7 @@ public class Workspace implements ProjectTreeNode, Serializable {
 	public Preferences preferences = new Preferences();
 	public File baseFolder;
 	public File settingsFile;
+	public transient WorkspaceSettings settings;
 	public transient List<ProjectTreeNode> projects = new ArrayList<ProjectTreeNode>();
 	public Set<String> projectsName = new HashSet<String>();
 	public Map<String, Boolean> projectsOpenByName = new HashMap<String, Boolean>();
@@ -53,6 +54,7 @@ public class Workspace implements ProjectTreeNode, Serializable {
 				e.printStackTrace();
 			}
 		}
+		settings = new WorkspaceSettings(this);
 		settingsFile = new File(workspaceRoot, WS_SETTINGS_FILE);
 		if (!settingsFile.exists()) {
 			try {
@@ -89,6 +91,7 @@ public class Workspace implements ProjectTreeNode, Serializable {
 	}
 
 	public void save() {
+		settings.save();
 		SettingsSave.saveInstance(this, settingsFile, "Workspace");
 	}
 
@@ -229,6 +232,7 @@ public class Workspace implements ProjectTreeNode, Serializable {
 	}
 
 	public void refreshTransients() {
+		this.settings = new WorkspaceSettings(this);
 		this.projects = new ArrayList<ProjectTreeNode>();
 		Set<String> projectsFailed = new HashSet<String>();
 		for (String projectName : projectsName) {

src/com/gpl/rpg/atcontentstudio/model/WorkspaceSettings.java

@@ -0,0 +1,204 @@
+package com.gpl.rpg.atcontentstudio.model;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileReader;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.StringWriter;
+import java.util.ArrayList;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.json.simple.JSONObject;
+import org.json.simple.parser.JSONParser;
+import org.json.simple.parser.ParseException;
+
+import com.gpl.rpg.atcontentstudio.ATContentStudio;
+import com.gpl.rpg.atcontentstudio.Notification;
+import com.gpl.rpg.atcontentstudio.io.JsonPrettyWriter;
+
+public class WorkspaceSettings {
+	
+	public static final String VERSION_KEY = "ATCS_Version";
+	public static final String FILENAME = "workspace_settings.json";
+	
+	public static final int SETTINGS_VERSION = 1;
+
+	public Workspace parent;
+	public File file;
+	
+	public static Boolean DEFAULT_USE_SYS_MAP_EDITOR = true;
+	public Setting<Boolean> useSystemDefaultMapEditor = new PrimitiveSetting<Boolean>("useSystemDefaultMapEditor", DEFAULT_USE_SYS_MAP_EDITOR);
+	public static String DEFAULT_MAP_EDITOR_COMMAND = "tiled";
+	public Setting<String> mapEditorCommand = new PrimitiveSetting<String>("mapEditorCommand", DEFAULT_MAP_EDITOR_COMMAND);
+	
+	public static Boolean DEFAULT_USE_SYS_IMG_VIEWER = true;
+	public Setting<Boolean> useSystemDefaultImageViewer = new PrimitiveSetting<Boolean>("useSystemDefaultImageViewer", DEFAULT_USE_SYS_IMG_VIEWER);
+	public static Boolean DEFAULT_USE_SYS_IMG_EDITOR = false;
+	public Setting<Boolean> useSystemDefaultImageEditor = new PrimitiveSetting<Boolean>("useSystemDefaultImageEditor", DEFAULT_USE_SYS_IMG_EDITOR);
+	public static String DEFAULT_IMG_EDITOR_COMMAND = "gimp";
+	public Setting<String> imageEditorCommand = new PrimitiveSetting<String>("imageEditorCommand", DEFAULT_IMG_EDITOR_COMMAND);
+
+	public List<Setting<? extends Object>> settings = new ArrayList<Setting<? extends Object>>();
+	
+	public WorkspaceSettings(Workspace parent) {
+		this.parent = parent;
+		settings.add(useSystemDefaultMapEditor);
+		settings.add(mapEditorCommand);
+		settings.add(useSystemDefaultImageViewer);
+		settings.add(useSystemDefaultImageEditor);
+		settings.add(imageEditorCommand);
+		file = new File(parent.baseFolder, FILENAME);
+		if (file.exists()) {
+			load(file);
+		}
+	}
+	
+	public void load(File f) {
+		JSONParser parser = new JSONParser();
+		FileReader reader = null;
+		try {
+			reader = new FileReader(f);
+			@SuppressWarnings("rawtypes")
+			Map jsonSettings = (Map) parser.parse(reader);
+			Integer version = (Integer) jsonSettings.get(VERSION_KEY);
+			if (version != null) {
+				if (version >= 1) {
+					loadv1(jsonSettings);
+				}
+			}
+			
+		} catch (FileNotFoundException e) {
+			Notification.addError("Error while parsing workspace settings: "+e.getMessage());
+			e.printStackTrace();
+		} catch (IOException e) {
+			Notification.addError("Error while parsing workspace settings: "+e.getMessage());
+			e.printStackTrace();
+		} catch (ParseException e) {
+			Notification.addError("Error while parsing workspace settings: "+e.getMessage());
+			e.printStackTrace();
+		} finally {
+			if (reader != null)
+				try {
+					reader.close();
+				} catch (IOException e) {
+					e.printStackTrace();
+				}
+		}
+	}
+	
+	@SuppressWarnings("rawtypes")
+	private void loadv1(Map jsonSettings) {
+		for (Setting s : settings) {
+			s.readFromJson(jsonSettings);
+		}
+	}
+
+	@SuppressWarnings("unchecked")
+	public void save() {
+		@SuppressWarnings("rawtypes")
+		Map json = new LinkedHashMap();
+		for (Setting<? extends Object> s : settings) {
+			s.saveToJson(json);
+		}
+		
+		if (json.isEmpty()) {
+			//Everything is default.
+			file.delete();
+			return;
+		}
+
+		json.put(VERSION_KEY, SETTINGS_VERSION);
+		StringWriter writer = new JsonPrettyWriter();
+		try {
+			JSONObject.writeJSONString(json, writer);
+		} catch (IOException e) {
+			//Impossible with a StringWriter
+		}
+		String toWrite = writer.toString();
+		try {
+			FileWriter w = new FileWriter(file);
+			w.write(toWrite);
+			w.close();
+			Notification.addSuccess("Workspace settings saved.");
+		} catch (IOException e) {
+			Notification.addError("Error while saving workspace settings : "+e.getMessage());
+			e.printStackTrace();
+		}
+	}
+	
+	public void resetDefault() {
+		for (Setting<? extends Object> s : settings) {
+			s.resetDefault();
+		}
+	}
+	
+	public abstract class Setting<X extends Object> {
+
+		public String id;
+		public X value, defaultValue;
+		
+		public void setCurrentValue(X value) {
+			this.value = value;
+		}
+		
+		public X getCurrentValue() {
+			return value;
+		}
+		
+		public X getDefaultValue() {
+			return defaultValue;
+		}
+		
+		public void resetDefault() {
+			value = defaultValue;
+		}
+		
+		public abstract void readFromJson(Map json);
+		
+		@SuppressWarnings({ "rawtypes", "unchecked" })
+		public void saveToJson(Map json) {
+			if (!defaultValue.equals(value)) json.put(id, value);
+		}
+	}
+	
+	public class PrimitiveSetting<X extends Object> extends Setting<X> {
+		
+		
+		public PrimitiveSetting(String id, X defaultValue) {
+			this.id = id;
+			this.value = this.defaultValue = defaultValue;
+		}
+		
+		@SuppressWarnings({ "rawtypes", "unchecked" })
+		public void readFromJson(Map json) {
+			if (json.get(id) != null) value = (X)json.get(id);
+		}
+		
+		
+	}
+	
+	public class ListSetting<X extends Object> extends Setting<List<X>> {
+
+		public ListSetting(String id, List<X> defaultValue) {
+			this.id = id;
+			this.value = this.defaultValue = defaultValue;
+		}
+		
+		@Override
+		public void readFromJson(Map json) {
+			value = new ArrayList<X>();
+			if (json.get(id) != null) {
+				for (Object o : ((List)json.get(id))) {
+					value.add((X)o);
+				}
+			}
+		}
+		
+	}
+	
+	
+
+}

src/com/gpl/rpg/atcontentstudio/model/gamedata/ActorCondition.java

@@ -20,6 +20,8 @@ import com.gpl.rpg.atcontentstudio.model.GameSource;
 public class ActorCondition extends JSONElement {
 	
 	private static final long serialVersionUID = -3969824899972048507L;
+
+	public static final Integer CLEAR_AC_MAGNITUDE = -99;
 	
 	// Available from init state
 	//public String id; inherited.
@@ -86,7 +88,7 @@ public class ActorCondition extends JSONElement {
 	
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+display_name+" ("+id+")";
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+display_name+" ("+id+")";
 	}
 	
 	@SuppressWarnings("rawtypes")

src/com/gpl/rpg/atcontentstudio/model/gamedata/Dialogue.java

@@ -18,6 +18,7 @@ import com.gpl.rpg.atcontentstudio.Notification;
 import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.GameSource;
 import com.gpl.rpg.atcontentstudio.model.Project;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
 import com.gpl.rpg.atcontentstudio.model.gamedata.Requirement.RequirementType;
 import com.gpl.rpg.atcontentstudio.model.maps.TMXMap;
 import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
@@ -91,7 +92,7 @@ public class Dialogue extends JSONElement {
 	
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+id;
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+id;
 	}
 
 	public static String getStaticDesc() {
@@ -348,18 +349,21 @@ public class Dialogue extends JSONElement {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (switch_to_npc == oldOne) {
+			oldOne.removeBacklink(this);
 			switch_to_npc = (NPC) newOne;
 			if (newOne != null) newOne.addBacklink(this);
 		} else {
 			if (replies != null) {
 				for (Reply r : replies) {
 					if (r.next_phrase == oldOne) {
+						oldOne.removeBacklink(this);
 						r.next_phrase = (Dialogue) newOne;
 						if (newOne != null) newOne.addBacklink(this);
 					}
 					if (r.requirements != null) {
 						for (Requirement req : r.requirements) {
 							if (req.required_obj == oldOne) {
+								oldOne.removeBacklink(this);
 								req.required_obj = newOne;
 								if (newOne != null) newOne.addBacklink(this);
 							}
@@ -370,6 +374,7 @@ public class Dialogue extends JSONElement {
 			if (rewards != null) {
 				for (Reward r : rewards) {
 					if (r.reward_obj == oldOne) {
+						oldOne.removeBacklink(this);
 						r.reward_obj = newOne;
 						if (newOne != null) newOne.addBacklink(this);
 					}

src/com/gpl/rpg/atcontentstudio/model/gamedata/Droplist.java

@@ -17,6 +17,7 @@ import com.gpl.rpg.atcontentstudio.Notification;
 import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.GameSource;
 import com.gpl.rpg.atcontentstudio.model.Project;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
 import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
 
 
@@ -46,7 +47,7 @@ public class Droplist extends JSONElement {
 	
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+id;
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+id;
 	}
 
 	public static String getStaticDesc() {
@@ -193,6 +194,7 @@ public class Droplist extends JSONElement {
 		if (dropped_items != null) {
 			for (DroppedItem di : dropped_items) {
 				if (di.item == oldOne) {
+					oldOne.removeBacklink(this);
 					di.item = (Item) newOne;
 					if (newOne != null) newOne.addBacklink(this);
 				}

src/com/gpl/rpg/atcontentstudio/model/gamedata/Item.java

@@ -17,6 +17,7 @@ import com.gpl.rpg.atcontentstudio.Notification;
 import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.GameSource;
 import com.gpl.rpg.atcontentstudio.model.Project;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
 
 public class Item extends JSONElement {
 
@@ -101,7 +102,7 @@ public class Item extends JSONElement {
 	
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+name+" ("+id+")";
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+name+" ("+id+")";
 	}
 
 	public static String getStaticDesc() {
@@ -450,12 +451,14 @@ public class Item extends JSONElement {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (this.category == oldOne) {
+			oldOne.removeBacklink(this);
 			this.category = (ItemCategory) newOne;
 			if (newOne != null) newOne.addBacklink(this);
 		} else {
 			if (this.equip_effect != null && this.equip_effect.conditions != null) {
 				for (ConditionEffect c : this.equip_effect.conditions) {
 					if (c.condition == oldOne) {
+						oldOne.removeBacklink(this);
 						c.condition = (ActorCondition) newOne;
 						if (newOne != null) newOne.addBacklink(this);
 					}
@@ -464,6 +467,7 @@ public class Item extends JSONElement {
 			if (this.hit_effect != null && this.hit_effect.conditions_source != null) {
 				for (TimedConditionEffect c : this.hit_effect.conditions_source) {
 					if (c.condition == oldOne) {
+						oldOne.removeBacklink(this);
 						c.condition = (ActorCondition) newOne;
 						if (newOne != null) newOne.addBacklink(this);
 					}
@@ -472,6 +476,7 @@ public class Item extends JSONElement {
 			if (this.hit_effect != null && this.hit_effect.conditions_target != null) {
 				for (TimedConditionEffect c : this.hit_effect.conditions_target) {
 					if (c.condition == oldOne) {
+						oldOne.removeBacklink(this);
 						c.condition = (ActorCondition) newOne;
 						if (newOne != null) newOne.addBacklink(this);
 					}
@@ -481,6 +486,7 @@ public class Item extends JSONElement {
 			if (this.kill_effect != null && this.kill_effect.conditions_source != null) {
 				for (TimedConditionEffect c : this.kill_effect.conditions_source) {
 					if (c.condition == oldOne) {
+						oldOne.removeBacklink(this);
 						c.condition = (ActorCondition) newOne;
 						if (newOne != null) newOne.addBacklink(this);
 					}

src/com/gpl/rpg/atcontentstudio/model/gamedata/ItemCategory.java

@@ -17,6 +17,7 @@ import org.json.simple.parser.ParseException;
 import com.gpl.rpg.atcontentstudio.Notification;
 import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.GameSource;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
 
 public class ItemCategory extends JSONElement {
 
@@ -99,7 +100,7 @@ public class ItemCategory extends JSONElement {
 
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+name+" ("+id+")";
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+name+" ("+id+")";
 	}
 
 	public static String getStaticDesc() {

src/com/gpl/rpg/atcontentstudio/model/gamedata/NPC.java

@@ -17,6 +17,7 @@ import com.gpl.rpg.atcontentstudio.Notification;
 import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.GameSource;
 import com.gpl.rpg.atcontentstudio.model.Project;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
 
 public class NPC extends JSONElement {
 
@@ -95,7 +96,7 @@ public class NPC extends JSONElement {
 	
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+name+" ("+id+")";
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+name+" ("+id+")";
 	}
 
 	public static String getStaticDesc() {
@@ -356,16 +357,19 @@ public class NPC extends JSONElement {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (dialogue == oldOne) {
+			oldOne.removeBacklink(this);
 			this.dialogue = (Dialogue) newOne;
 			if (newOne != null) newOne.addBacklink(this);
 		} else {
 			if (this.droplist == oldOne) {
+				oldOne.removeBacklink(this);
 				this.droplist = (Droplist) newOne;
 				if (newOne != null) newOne.addBacklink(this);
 			} else {
 				if (this.hit_effect != null && this.hit_effect.conditions_source != null) {
 					for (TimedConditionEffect tce : this.hit_effect.conditions_source) {
 						if (tce.condition == oldOne) {
+							oldOne.removeBacklink(this);
 							tce.condition = (ActorCondition) newOne;
 							if (newOne != null) newOne.addBacklink(this);
 						}
@@ -374,6 +378,7 @@ public class NPC extends JSONElement {
 				if (this.hit_effect != null && this.hit_effect.conditions_target != null) {
 					for (TimedConditionEffect tce : this.hit_effect.conditions_target) {
 						if (tce.condition == oldOne) {
+							oldOne.removeBacklink(this);
 							tce.condition = (ActorCondition) newOne;
 							if (newOne != null) newOne.addBacklink(this);
 						}

src/com/gpl/rpg/atcontentstudio/model/gamedata/Quest.java

@@ -16,6 +16,7 @@ import org.json.simple.parser.ParseException;
 import com.gpl.rpg.atcontentstudio.Notification;
 import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.GameSource;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
 import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
 
 public class Quest extends JSONElement {
@@ -48,7 +49,7 @@ public class Quest extends JSONElement {
 	
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+name+" ("+id+")";
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+name+" ("+id+")";
 	}
 
 	public static String getStaticDesc() {

src/com/gpl/rpg/atcontentstudio/model/gamedata/Requirement.java

@@ -145,8 +145,9 @@ public class Requirement extends JSONElement {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (this.required_obj == oldOne) {
+			oldOne.removeBacklink((GameDataElement) this.parent);
 			this.required_obj = newOne;
-			if (newOne != null) newOne.addBacklink(this);
+			if (newOne != null) newOne.addBacklink((GameDataElement) this.parent);
 		}
 	}
 	@Override

src/com/gpl/rpg/atcontentstudio/model/maps/ContainerArea.java

@@ -29,8 +29,9 @@ public class ContainerArea extends MapObject {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (oldOne == droplist) {
+			oldOne.removeBacklink(parentMap);
 			droplist = (Droplist) newOne;
-			newOne.addBacklink(parentMap);
+			if (newOne != null) newOne.addBacklink(parentMap);
 		}
 	}
 	

src/com/gpl/rpg/atcontentstudio/model/maps/KeyArea.java

@@ -60,8 +60,9 @@ public class KeyArea extends MapObject {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (oldOne == dialogue) {
+			oldOne.removeBacklink(parentMap);
 			dialogue = (Dialogue) newOne;
-			newOne.addBacklink(parentMap);
+			if (newOne != null) newOne.addBacklink(parentMap);
 		}
 		requirement.elementChanged(oldOne, newOne);
 	}

src/com/gpl/rpg/atcontentstudio/model/maps/MapChange.java

@@ -37,8 +37,9 @@ public class MapChange extends MapObject {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (oldOne == map) {
+			oldOne.removeBacklink(parentMap);
 			map = (TMXMap) newOne;
-			newOne.addBacklink(parentMap);
+			if (newOne != null) newOne.addBacklink(parentMap);
 		}
 	}
 	

src/com/gpl/rpg/atcontentstudio/model/maps/ScriptArea.java

@@ -42,8 +42,9 @@ public class ScriptArea extends MapObject {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (oldOne == dialogue) {
+			oldOne.removeBacklink(parentMap);
 			dialogue = (Dialogue) newOne;
-			newOne.addBacklink(parentMap);
+			if (newOne != null) newOne.addBacklink(parentMap);
 		}
 	}
 	

src/com/gpl/rpg/atcontentstudio/model/maps/SignArea.java

@@ -31,8 +31,9 @@ public class SignArea extends MapObject {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		if (oldOne == dialogue) {
+			oldOne.removeBacklink(parentMap);
 			dialogue = (Dialogue) newOne;
-			newOne.addBacklink(parentMap);
+			if (newOne != null) newOne.addBacklink(parentMap);
 		}
 	}
 	

src/com/gpl/rpg/atcontentstudio/model/maps/SpawnArea.java

@@ -64,8 +64,9 @@ public class SpawnArea extends MapObject {
 			}
 		}
 		if (replacedIndex >= 0) {
+			oldOne.removeBacklink(parentMap);
 			spawnGroup.set(replacedIndex, (NPC) newOne);
-			newOne.addBacklink(parentMap);
+			if (newOne != null) newOne.addBacklink(parentMap);
 		}
 	}
 	

src/com/gpl/rpg/atcontentstudio/model/maps/TMXMap.java

@@ -12,6 +12,7 @@ import java.util.Enumeration;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.tree.TreeNode;
 
@@ -26,6 +27,7 @@ import com.gpl.rpg.atcontentstudio.model.Project;
 import com.gpl.rpg.atcontentstudio.model.ProjectTreeNode;
 import com.gpl.rpg.atcontentstudio.model.SaveEvent;
 import com.gpl.rpg.atcontentstudio.model.gamedata.GameDataSet;
+import com.gpl.rpg.atcontentstudio.model.gamedata.NPC;
 import com.gpl.rpg.atcontentstudio.model.sprites.Spritesheet;
 import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
 
@@ -61,6 +63,8 @@ public class TMXMap extends GameDataElement {
 	public ColorFilter colorFilter = null;
 
 	public boolean writable = false;
+	public boolean changedOnDisk = false;
+	public int dismissNextChangeNotif = 0;
 
 	public TMXMap(TMXMapSet parent, File f) {
 		this.parent = parent;
@@ -197,7 +201,7 @@ public class TMXMap extends GameDataElement {
 	}
 	@Override
 	public String getDesc() {
-		return (this.state == State.modified ? "*" : "")+id;
+		return ((this.state == State.modified || this.state == State.created) ? "*" : "")+id;
 	}
 	
 	@Override
@@ -270,10 +274,13 @@ public class TMXMap extends GameDataElement {
 	public void save() {
 		if (writable) {
 			try {
+				//TODO: check in fileutils, to test the workspace's filesystem once at startup, and figure out how many of these can occur, instead of hard-coded '2'
+				dismissNextChangeNotif += 2;
 				FileWriter w = new FileWriter(tmxFile);
 				w.write(toXml());
 				w.close();
 				this.state = State.saved;
+				changedOnDisk = false;
 				Notification.addSuccess("TMX file "+tmxFile.getAbsolutePath()+" saved.");
 			} catch (IOException e) {
 				Notification.addError("Error while writing TMX file "+tmxFile.getAbsolutePath()+" : "+e.getMessage());
@@ -309,8 +316,10 @@ public class TMXMap extends GameDataElement {
 			parse();
 		}
 		if (this.state == GameDataElement.State.parsed || this.state == GameDataElement.State.created) {
-			for (MapObjectGroup group : groups) {
-				group.link();
+			if (groups != null) {
+				for (MapObjectGroup group : groups) {
+					group.link();
+				}
 			}
 		}
 	}
@@ -390,5 +399,77 @@ public class TMXMap extends GameDataElement {
 				ABOVE_LAYER_NAME.equalsIgnoreCase(name) ||
 				WALKABLE_LAYER_NAME.equalsIgnoreCase(name);
 	}
+
+	
+	public void reload() {
+		tmxMap = null;
+		for (Spritesheet s : usedSpritesheets) {
+			s.elementChanged(this, null);
+		}
+		usedSpritesheets.clear();
+		for (MapObjectGroup g : groups) {
+			for (MapObject o : g.mapObjects) {
+				if (o instanceof ContainerArea) {
+					if (((ContainerArea)o).droplist != null) ((ContainerArea)o).droplist.elementChanged(this, null);
+				} else if (o instanceof KeyArea) {
+					if (((KeyArea)o).dialogue != null) ((KeyArea)o).dialogue.elementChanged(this, null);
+					if (((KeyArea)o).requirement != null && ((KeyArea)o).requirement.required_obj != null) ((KeyArea)o).requirement.required_obj.elementChanged(this, null);
+				} else if (o instanceof MapChange) {
+					if (((MapChange)o).map != null) ((MapChange)o).map.elementChanged(this, null);
+				} else if (o instanceof ReplaceArea) {
+					if (((ReplaceArea)o).requirement != null && ((ReplaceArea)o).requirement.required_obj != null) ((ReplaceArea)o).requirement.required_obj.elementChanged(this, null);
+				} else if (o instanceof RestArea) {
+				} else if (o instanceof ScriptArea) {
+					if (((ScriptArea)o).dialogue != null) ((ScriptArea)o).dialogue.elementChanged(this, null);
+				} else if (o instanceof SignArea) {
+					if (((SignArea)o).dialogue != null) ((SignArea)o).dialogue.elementChanged(this, null);
+				} else if (o instanceof SpawnArea) {
+					if (((SpawnArea)o).spawnGroup != null) {
+						for (NPC n : ((SpawnArea)o).spawnGroup) {
+							n.elementChanged(this, null);
+						}
+					}
+				}
+			}
+		}
+		groups.clear();
+		outside = null;
+		colorFilter = null;
+		
+		state = GameDataElement.State.init;
+		this.link();
+		
+		changedOnDisk = false;
+		for (MapChangedOnDiskListener l : listeners) {
+			l.mapReloaded();
+		}
+	}
+	
+	public void mapChangedOnDisk() {
+		if (dismissNextChangeNotif > 0) {
+			dismissNextChangeNotif--;
+		} else {
+			changedOnDisk = true;
+			for (MapChangedOnDiskListener l : listeners) {
+				l.mapChanged();
+			}
+		}
+	}
+	
+	public interface MapChangedOnDiskListener {
+		public void mapChanged();
+		public void mapReloaded();
+	}
+	
+	private List<MapChangedOnDiskListener> listeners = new CopyOnWriteArrayList<TMXMap.MapChangedOnDiskListener>();
+	
+	public void addMapChangedOnDiskListener(MapChangedOnDiskListener l) {
+		listeners.add(l);
+	}
+	
+	public void removeMapChangedOnDiskListener(MapChangedOnDiskListener l) {
+		listeners.remove(l);
+	}
+	
 	
 }

src/com/gpl/rpg/atcontentstudio/model/maps/TMXMapSet.java

@@ -3,9 +3,14 @@ package com.gpl.rpg.atcontentstudio.model.maps;
 import java.awt.Image;
 import java.io.File;
 import java.io.IOException;
+import java.nio.file.FileSystems;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.StandardWatchEventKinds;
+import java.nio.file.WatchEvent;
+import java.nio.file.WatchKey;
+import java.nio.file.WatchService;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.Comparator;
@@ -23,6 +28,7 @@ import com.gpl.rpg.atcontentstudio.model.ProjectTreeNode;
 import com.gpl.rpg.atcontentstudio.model.gamedata.GameDataSet;
 import com.gpl.rpg.atcontentstudio.model.sprites.SpriteSheetSet;
 import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
+import com.gpl.rpg.atcontentstudio.utils.FileUtils;
 
 public class TMXMapSet implements ProjectTreeNode {
 
@@ -50,15 +56,7 @@ public class TMXMapSet implements ProjectTreeNode {
 			if (!this.mapFolder.exists()) {
 				this.mapFolder.mkdirs();
 			}
-			Path target = Paths.get(getProject().baseContent.gameSprites.drawableFolder.getAbsolutePath());
-			Path link = Paths.get(new File(mapFolder.getAbsolutePath()+File.separator+DEFAULT_REL_PATH_TO_DRAWABLE).getAbsolutePath());
-			if (!Files.exists(link)) {
-				try {
-					Files.createSymbolicLink(link, target);
-				} catch (IOException e) {
-					e.printStackTrace();
-				}
-			}
+			FileUtils.makeSymlink(getProject().baseContent.gameSprites.drawableFolder, new File(mapFolder.getAbsolutePath()+File.separator+DEFAULT_REL_PATH_TO_DRAWABLE));
 		}
 		this.tmxMaps = new ArrayList<TMXMap>();
 		
@@ -94,6 +92,43 @@ public class TMXMapSet implements ProjectTreeNode {
 				return o1.id.compareTo(o2.id);
 			}
 		});
+		if (source.type == GameSource.Type.created | source.type == GameSource.Type.altered) {
+			final Path folderPath = Paths.get(mapFolder.getAbsolutePath());
+			Thread watcher = new Thread("Map folder watcher for "+source.type) {
+				public void run() {
+					WatchService watchService;
+
+					while(getProject().open) {
+						try {
+							watchService = FileSystems.getDefault().newWatchService();
+							WatchKey watchKey = folderPath.register(watchService, StandardWatchEventKinds.ENTRY_MODIFY);
+							WatchKey wk;
+							validService: while(getProject().open) {
+								wk = watchService.take();
+								for (WatchEvent<?> event : wk.pollEvents()) {
+									Path changed = (Path) event.context();
+									String name = changed.getFileName().toString();
+									String id = name.substring(0, name.length() - 4);
+									TMXMap map = getMap(id);
+									if (map != null) {
+										map.mapChangedOnDisk();
+									}
+								}
+								if(!wk.reset()) {
+									watchService.close();
+									break validService;
+								}
+							}
+						} catch (IOException e) {
+							e.printStackTrace();
+						} catch (InterruptedException e) {
+							e.printStackTrace();
+						}
+					}
+				};
+			};
+			watcher.start();
+		}
 	}
 	
 	@Override

src/com/gpl/rpg/atcontentstudio/model/maps/WorldmapSegment.java

@@ -103,7 +103,7 @@ public class WorldmapSegment extends GameDataElement {
 	@Override
 	public void elementChanged(GameDataElement oldOne, GameDataElement newOne) {
 		oldOne.removeBacklink(this);
-		newOne.addBacklink(this);
+		if(newOne != null) newOne.addBacklink(this);
 	}
 
 	@Override

src/com/gpl/rpg/atcontentstudio/ui/Editor.java

@@ -14,6 +14,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.regex.Matcher;
 
 import javax.swing.AbstractListModel;
@@ -681,7 +682,7 @@ public abstract class Editor extends JPanel implements ProjectElementListener {
 			return null;
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {

src/com/gpl/rpg/atcontentstudio/ui/JSONCreationWizard.java

@@ -10,6 +10,7 @@ import java.awt.event.ItemEvent;
 import java.awt.event.ItemListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.ComboBoxModel;
 import javax.swing.DefaultListCellRenderer;
@@ -518,7 +519,7 @@ public class JSONCreationWizard extends JDialog {
 			return DataType.values()[index];
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -584,7 +585,7 @@ public class JSONCreationWizard extends JDialog {
 		public void elementCreated(JSONElement created);
 	}
 	
-	private List<CreationCompletedListener> listeners = new ArrayList<JSONCreationWizard.CreationCompletedListener>();
+	private List<CreationCompletedListener> listeners = new CopyOnWriteArrayList<JSONCreationWizard.CreationCompletedListener>();
 	
 	public void addCreationListener(CreationCompletedListener l) {
 		listeners.add(l);

src/com/gpl/rpg/atcontentstudio/ui/JSONImportWizard.java

@@ -15,6 +15,7 @@ import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.ButtonGroup;
 import javax.swing.ComboBoxModel;
@@ -603,7 +604,7 @@ public class JSONImportWizard extends JDialog {
 			return null;
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -639,7 +640,7 @@ public class JSONImportWizard extends JDialog {
 			return DataType.values()[index];
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 
 		@Override
 		public void addListDataListener(ListDataListener l) {

src/com/gpl/rpg/atcontentstudio/ui/NotificationsPane.java

@@ -8,6 +8,7 @@ import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.imageio.ImageIO;
 import javax.swing.BorderFactory;
@@ -101,7 +102,7 @@ public class NotificationsPane extends JList {
 			}
 		}
 		
-		private List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		private List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		@Override
 		public void addListDataListener(ListDataListener l) {
 			listeners.add(l);

src/com/gpl/rpg/atcontentstudio/ui/ProjectCreationWizard.java

@@ -11,6 +11,7 @@ import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.ComboBoxModel;
 import javax.swing.JButton;
@@ -55,7 +56,7 @@ public class ProjectCreationWizard extends JDialog {
 		atSourceSelectionCombo = new JComboBox<String>();
 		resourceSetToUse = new JComboBox<Project.ResourceSet>(new ComboBoxModel<Project.ResourceSet>() {
 
-			Project.ResourceSet selected = Project.ResourceSet.allFiles;
+			Project.ResourceSet selected = Project.ResourceSet.gameData;
 			
 			@Override
 			public int getSize() {
@@ -67,7 +68,7 @@ public class ProjectCreationWizard extends JDialog {
 				return Project.ResourceSet.values()[index];
 			}
 
-			List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+			List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 			
 			@Override
 			public void addListDataListener(ListDataListener l) {

src/com/gpl/rpg/atcontentstudio/ui/ProjectsTree.java

@@ -11,6 +11,7 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.ImageIcon;
 import javax.swing.JLabel;
@@ -202,6 +203,10 @@ public class ProjectsTree extends JPanel {
 			addNextSeparator = true;
 			popupMenu.add(new JMenuItem(actions.importJSON));
 		}
+		if (actions.createMap.isEnabled()) {
+			addNextSeparator = true;
+			popupMenu.add(new JMenuItem(actions.createMap));
+		}
 		if (actions.createWorldmap.isEnabled()) {
 			addNextSeparator = true;
 			popupMenu.add(new JMenuItem(actions.createWorldmap));
@@ -651,7 +656,7 @@ public class ProjectsTree extends JPanel {
 			return ((ProjectTreeNode)parent).getIndex((ProjectTreeNode) child);
 		}
 
-		List<TreeModelListener> listeners = new ArrayList<TreeModelListener>();
+		List<TreeModelListener> listeners = new CopyOnWriteArrayList<TreeModelListener>();
 		
 		@Override
 		public void addTreeModelListener(TreeModelListener l) {

src/com/gpl/rpg/atcontentstudio/ui/StudioFrame.java

@@ -129,6 +129,8 @@ public class StudioFrame extends JFrame {
 		fileMenu.add(new JMenuItem(actions.closeProject));
 		fileMenu.add(new JMenuItem(actions.deleteProject));
 		fileMenu.add(new JSeparator());
+		fileMenu.add(new JMenuItem(actions.editWorkspaceSettings));
+		fileMenu.add(new JSeparator());
 		fileMenu.add(new JMenuItem(actions.exitATCS));
 		getJMenuBar().add(fileMenu);
 		
@@ -138,6 +140,7 @@ public class StudioFrame extends JFrame {
 		projectMenu.add(new JSeparator());
 		projectMenu.add(new JMenuItem(actions.createGDE));
 		projectMenu.add(new JMenuItem(actions.importJSON));
+		projectMenu.add(new JMenuItem(actions.createMap));
 		projectMenu.add(new JMenuItem(actions.createWorldmap));
 		projectMenu.add(new JMenuItem(actions.loadSave));
 		getJMenuBar().add(projectMenu);

src/com/gpl/rpg/atcontentstudio/ui/TMXMapCreationWizard.java

@@ -0,0 +1,300 @@
+package com.gpl.rpg.atcontentstudio.ui;
+
+import java.awt.BorderLayout;
+import java.awt.Component;
+import java.awt.Dimension;
+import java.awt.Toolkit;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+import java.io.File;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+
+import javax.swing.ButtonGroup;
+import javax.swing.ComboBoxModel;
+import javax.swing.DefaultListCellRenderer;
+import javax.swing.ImageIcon;
+import javax.swing.JButton;
+import javax.swing.JComboBox;
+import javax.swing.JDialog;
+import javax.swing.JLabel;
+import javax.swing.JList;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JTextField;
+import javax.swing.event.DocumentEvent;
+import javax.swing.event.DocumentListener;
+import javax.swing.event.ListDataListener;
+
+import com.gpl.rpg.atcontentstudio.ATContentStudio;
+import com.gpl.rpg.atcontentstudio.model.GameDataElement.State;
+import com.gpl.rpg.atcontentstudio.model.GameSource;
+import com.gpl.rpg.atcontentstudio.model.Project;
+import com.gpl.rpg.atcontentstudio.model.maps.TMXMap;
+import com.jidesoft.swing.JideBoxLayout;
+
+public class TMXMapCreationWizard extends JDialog {
+
+	private static final long serialVersionUID = -474689694453543575L;
+	private static final String DEFAULT_TEMPLATE = "template.tmx";
+	
+	
+	private TMXMap creation = null;
+	final File templateFile; 
+	
+	final JLabel message;
+	final JRadioButton useTemplate, copyMap;
+	final JComboBox<TMXMap> templateCombo;
+	final JTextField idField;
+	final JButton ok;
+	final Project proj;
+	
+	@SuppressWarnings({ "unchecked", "rawtypes" })
+	public TMXMapCreationWizard(final Project proj) {
+		super(ATContentStudio.frame);
+		this.proj = proj;
+		templateFile=new File(proj.baseContent.gameMaps.mapFolder, DEFAULT_TEMPLATE);
+		
+		setTitle("Create new TMX map");
+		
+		JPanel pane = new JPanel();
+		pane.setLayout(new JideBoxLayout(pane, JideBoxLayout.PAGE_AXIS, 6));
+		
+		pane.add(new JLabel("Create a new TMX map."), JideBoxLayout.FIX);
+		
+		message = new JLabel("Enter new map name:");
+		pane.add(message, JideBoxLayout.FIX);
+		
+		final JPanel idPane = new JPanel();
+		idPane.setLayout(new BorderLayout());
+		JLabel idLabel = new JLabel("Internal ID: ");
+		idPane.add(idLabel, BorderLayout.WEST);
+		idField = new JTextField("");
+		idField.setEditable(true);
+		idPane.add(idField, BorderLayout.CENTER);
+		pane.add(idPane, JideBoxLayout.FIX);
+
+		useTemplate = new JRadioButton("Use default template file ("+DEFAULT_TEMPLATE+")");
+		useTemplate.setToolTipText(templateFile.getAbsolutePath());
+		pane.add(useTemplate, JideBoxLayout.FIX);
+		copyMap = new JRadioButton("Copy existing map");
+		pane.add(copyMap, JideBoxLayout.FIX);
+		
+		ButtonGroup radioGroup = new ButtonGroup();
+		radioGroup.add(useTemplate);
+		radioGroup.add(copyMap);
+		
+		final JPanel templatePane = new JPanel();
+		templatePane.setLayout(new BorderLayout());
+		JLabel templateLabel = new JLabel("Template to copy: ");
+		templatePane.add(templateLabel, BorderLayout.WEST);
+		templateCombo = new JComboBox(new TemplateComboModel());
+		templateCombo.setRenderer(new TemplateComboCellRenderer());
+		if (proj.getMap(DEFAULT_TEMPLATE) != null) templateCombo.setSelectedItem(proj.getMap(DEFAULT_TEMPLATE));
+		templatePane.add(templateCombo, BorderLayout.CENTER);
+		pane.add(templatePane, JideBoxLayout.FIX);
+		pane.add(templateCombo);
+		
+		if (templateFile.exists()) {
+			useTemplate.setSelected(true);
+			copyMap.setSelected(false);
+			templateCombo.setEnabled(false);
+		} else {
+			useTemplate.setSelected(false);
+			useTemplate.setEnabled(false);
+			useTemplate.setToolTipText("Cannot find file "+templateFile.getAbsolutePath());
+			templateCombo.setEnabled(true);
+			copyMap.setSelected(true);
+		}
+		
+		ActionListener radioListener = new ActionListener() {
+			
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				if (useTemplate.isSelected()) {
+					templateCombo.setEnabled(false);
+				} else if(copyMap.isSelected()) {
+					templateCombo.setEnabled(true);
+				}
+				updateStatus();
+			}
+		};
+		useTemplate.addActionListener(radioListener);
+		copyMap.addActionListener(radioListener);
+		
+		templateCombo.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				updateStatus();
+			}
+		});
+		
+		pane.add(new JPanel(), JideBoxLayout.VARY);
+		
+		JPanel buttonPane = new JPanel();
+		buttonPane.setLayout(new JideBoxLayout(buttonPane, JideBoxLayout.LINE_AXIS, 6));
+		buttonPane.add(new JPanel(), JideBoxLayout.VARY);
+		JButton cancel = new JButton("Cancel");
+		buttonPane.add(cancel, JideBoxLayout.FIX);
+		ok = new JButton("Ok");
+		buttonPane.add(ok, JideBoxLayout.FIX);
+		pane.add(new JPanel(), JideBoxLayout.VARY);
+		pane.add(buttonPane, JideBoxLayout.FIX);
+		
+		ok.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				
+				if (copyMap.isSelected()) {
+					creation = ((TMXMap)templateCombo.getSelectedItem()).clone();
+				} else if (useTemplate.isSelected()) {
+					creation = new TMXMap(proj.createdContent.gameMaps, templateFile);
+					creation.parse();
+				}
+				creation.id = idField.getText();
+				creation.tmxFile = new File(creation.id+".tmx");
+				TMXMapCreationWizard.this.setVisible(false);
+				TMXMapCreationWizard.this.dispose();
+				creation.state = State.created;
+				proj.createElement(creation);
+				notifyCreated();
+				ATContentStudio.frame.selectInTree(creation);
+				ATContentStudio.frame.openEditor(creation);
+			}
+		});
+		
+		cancel.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				creation = null;
+				TMXMapCreationWizard.this.setVisible(false);
+				TMXMapCreationWizard.this.dispose();
+			}
+		});
+		
+		DocumentListener statusUpdater = new DocumentListener() {
+			@Override
+			public void removeUpdate(DocumentEvent e) {
+				updateStatus();
+			}
+			@Override
+			public void insertUpdate(DocumentEvent e) {
+				updateStatus();
+			}
+			@Override
+			public void changedUpdate(DocumentEvent e) {
+				updateStatus();
+			}
+		};
+		idField.getDocument().addDocumentListener(statusUpdater);
+		
+		getContentPane().setLayout(new BorderLayout());
+		getContentPane().add(pane, BorderLayout.CENTER);
+		
+		setMinimumSize(new Dimension(350,250));
+		updateStatus();
+		pack();
+		
+		Dimension sdim = Toolkit.getDefaultToolkit().getScreenSize();
+		Dimension wdim = getSize();
+		setLocation((sdim.width - wdim.width)/2, (sdim.height - wdim.height)/2);
+	}
+	
+	public void updateStatus() {
+		boolean trouble = false;
+		message.setText("<html><font color=\"#00AA00\">Looks OK to me.</font></html>");
+		if (copyMap.isSelected() && templateCombo.getSelectedItem() == null) {
+			message.setText("<html><font color=\"#FF0000\">Select a map template below:</font></html>");
+			trouble = true;
+		} else if (idField.getText() == null || idField.getText().length() <= 0) {
+			message.setText("<html><font color=\"#FF0000\">Internal ID must not be empty.</font></html>");
+			trouble = true;
+		}  else if (proj.getMap(idField.getText()) != null) {
+			if (proj.getMap(idField.getText()).getDataType() == GameSource.Type.created) {
+				message.setText("<html><font color=\"#FF0000\">A map with the same ID was already created in this project.</font></html>");
+				trouble = true;
+			} else if (proj.getMap(idField.getText()).getDataType() == GameSource.Type.altered) {
+				message.setText("<html><font color=\"#FF0000\">A map with the same ID exists in the game and is already altered in this project.</font></html>");
+				trouble = true;
+			} else if (proj.getMap(idField.getText()).getDataType() == GameSource.Type.source) {
+				message.setText("<html><font color=\"#FF9000\">A map with the same ID exists in the game. The new one will be added under \"altered\".</font></html>");
+			}   
+		}
+		
+		ok.setEnabled(!trouble);
+		
+		message.revalidate();
+		message.repaint();
+	}
+	
+	public static interface CreationCompletedListener {
+		public void mapCreated(TMXMap created);
+	}
+	
+	private List<CreationCompletedListener> listeners = new CopyOnWriteArrayList<TMXMapCreationWizard.CreationCompletedListener>();
+	
+	public void addCreationListener(CreationCompletedListener l) {
+		listeners.add(l);
+	}
+	
+	public void notifyCreated() {
+		for (CreationCompletedListener l : listeners) {
+			l.mapCreated(creation);
+		}
+	}
+	
+	class TemplateComboModel implements ComboBoxModel<TMXMap> {
+		
+		Object selected;
+
+		@Override
+		public int getSize() {
+			return proj.getMapCount();
+		}
+
+		@Override
+		public TMXMap getElementAt(int index) {
+			return proj.getMap(index);
+		}
+
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
+		
+		@Override
+		public void addListDataListener(ListDataListener l) {
+			listeners.add(l);
+		}
+
+		@Override
+		public void removeListDataListener(ListDataListener l) {
+			listeners.remove(l);
+		}
+
+		@Override
+		public void setSelectedItem(Object anItem) {
+			selected = anItem;
+		}
+
+		@Override
+		public Object getSelectedItem() {
+			return selected;
+		}
+		
+	}
+	
+	class TemplateComboCellRenderer extends DefaultListCellRenderer {
+		private static final long serialVersionUID = 5621373849299980998L;
+
+		@Override
+		public Component getListCellRendererComponent(@SuppressWarnings("rawtypes") JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
+			Component c = super.getListCellRendererComponent(list, value, index, isSelected, cellHasFocus);
+			if (c instanceof JLabel && value != null) {
+				((JLabel)c).setText(((TMXMap)value).getDesc());
+				((JLabel)c).setIcon(new ImageIcon(DefaultIcons.getTiledIconIcon()));
+			}
+			return c;
+		}
+	}
+	
+
+}

src/com/gpl/rpg/atcontentstudio/ui/WorkspaceActions.java

@@ -12,6 +12,8 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
+import java.util.concurrent.ConcurrentSkipListSet;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.Action;
 import javax.swing.JFileChooser;
@@ -226,7 +228,16 @@ public class WorkspaceActions {
 		}
 	};
 	
-
+	public ATCSAction createMap = new ATCSAction("Create TMX Map", "Opens the TMX Map creation wizard") {
+		public void actionPerformed(ActionEvent e) {
+			if (selectedNode == null || selectedNode.getProject() == null) return;
+			new TMXMapCreationWizard(selectedNode.getProject()).setVisible(true);
+		}
+		public void selectionChanged(ProjectTreeNode selectedNode, TreePath[] selectedPaths) {
+			setEnabled(selectedNode != null && selectedNode.getProject() != null);
+		}
+	};
+	
 	public ATCSAction createWorldmap = new ATCSAction("Create Worldmap segment", "Opens the worldmap segment creation wizard") {
 		public void actionPerformed(ActionEvent e) {
 			if (selectedNode == null || selectedNode.getProject() == null) return;
@@ -370,6 +381,15 @@ public class WorkspaceActions {
 		}
 	};
 	
+	public ATCSAction editWorkspaceSettings = new ATCSAction("Edit Workspace Settings", "Change the preferences of this workspace.") {
+		public void actionPerformed(ActionEvent e) {
+			new WorkspaceSettingsEditor(Workspace.activeWorkspace.settings);
+		};
+		public void selectionChanged(ProjectTreeNode selectedNode, TreePath[] selectedPaths) {
+			setEnabled(true);
+		};
+	};
+	
 	List<ATCSAction> actions = new ArrayList<WorkspaceActions.ATCSAction>();
 	
 	public WorkspaceActions() {
@@ -380,6 +400,7 @@ public class WorkspaceActions {
 		actions.add(saveElement);
 		actions.add(deleteSelected);
 		actions.add(createGDE);
+		actions.add(createMap);
 		actions.add(importJSON);
 		actions.add(loadSave);
 		actions.add(compareItems);
@@ -390,6 +411,7 @@ public class WorkspaceActions {
 		actions.add(testWriter);
 //		actions.add(testCommitWriter);
 		actions.add(createWriter);
+		actions.add(editWorkspaceSettings);
 		selectionChanged(null, null);
 	}
 	
@@ -432,10 +454,8 @@ public class WorkspaceActions {
 		public void putValue(String key, Object value) {
 			PropertyChangeEvent event = new PropertyChangeEvent(this, key, values.get(key), value);
 			values.put(key,  value);
-			synchronized(listeners) {
-				for (PropertyChangeListener l : listeners) {
-					l.propertyChange(event);
-				}
+			for (PropertyChangeListener l : listeners) {
+				l.propertyChange(event);
 			}
 		}
 
@@ -443,10 +463,8 @@ public class WorkspaceActions {
 		public void setEnabled(boolean b) {
 			PropertyChangeEvent event = new PropertyChangeEvent(this, "enabled", isEnabled(), b);
 			enabled = b;
-			synchronized(listeners) {
-				for (PropertyChangeListener l : listeners) {
-					l.propertyChange(event);
-				}
+			for (PropertyChangeListener l : listeners) {
+				l.propertyChange(event);
 			}
 		}
 
@@ -455,20 +473,16 @@ public class WorkspaceActions {
 			return enabled;
 		}
 
-		private Set<PropertyChangeListener> listeners = new HashSet<PropertyChangeListener>();
+		private List<PropertyChangeListener> listeners = new CopyOnWriteArrayList<PropertyChangeListener>();
 		
 		@Override
 		public void addPropertyChangeListener(PropertyChangeListener listener) {
-			synchronized(listeners) {
-				listeners.add(listener);
-			}
+			listeners.add(listener);
 		}
 
 		@Override
 		public void removePropertyChangeListener(PropertyChangeListener listener) {
-			synchronized(listeners) {
-				listeners.remove(listener);
-			}
+			listeners.remove(listener);
 		}
 		
 	}

src/com/gpl/rpg/atcontentstudio/ui/WorkspaceSettingsEditor.java

@@ -0,0 +1,180 @@
+package com.gpl.rpg.atcontentstudio.ui;
+
+import java.awt.BorderLayout;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
+
+import javax.swing.ButtonGroup;
+import javax.swing.JButton;
+import javax.swing.JDialog;
+import javax.swing.JPanel;
+import javax.swing.JRadioButton;
+import javax.swing.JScrollPane;
+import javax.swing.JTextField;
+
+import com.gpl.rpg.atcontentstudio.ATContentStudio;
+import com.gpl.rpg.atcontentstudio.model.WorkspaceSettings;
+import com.jidesoft.swing.JideBoxLayout;
+
+public class WorkspaceSettingsEditor extends JDialog {
+
+	private static final long serialVersionUID = -1326158719217162879L;
+	
+	WorkspaceSettings settings;
+	
+	JRadioButton useSystemDefaultMapEditorButton, useCustomMapEditorButton;
+	JTextField mapEditorCommandField;
+	
+	JRadioButton useSystemDefaultImageViewerButton, useSystemDefaultImageEditorButton, useCustomImageEditorButton;
+	JTextField imageEditorCommandField;
+	
+	
+	
+	public WorkspaceSettingsEditor(WorkspaceSettings settings) {
+		super(ATContentStudio.frame, "Workspace settings", true);
+		setIconImage(DefaultIcons.getMainIconImage());
+		
+		this.settings = settings;
+		
+		JPanel pane = new JPanel();
+		getContentPane().setLayout(new BorderLayout());
+		getContentPane().add(new JScrollPane(pane), BorderLayout.CENTER);
+		pane.setLayout(new JideBoxLayout(pane, JideBoxLayout.PAGE_AXIS));
+		JPanel buttonPane = new JPanel();
+		buttonPane.setLayout(new JideBoxLayout(buttonPane, JideBoxLayout.LINE_AXIS));
+		getContentPane().add(buttonPane, BorderLayout.SOUTH);
+		
+		
+		pane.add(getExternalToolsPane(), JideBoxLayout.FIX);
+		pane.add(new JPanel(), JideBoxLayout.VARY);
+
+		buttonPane.add(new JPanel(), JideBoxLayout.VARY);
+		JButton ok = new JButton("Ok");
+		ok.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				pushToModel();
+				dispose();
+			}
+		});
+		buttonPane.add(ok, JideBoxLayout.FIX);
+		JButton reset = new JButton("Reset to defaults");
+		reset.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				resetDefaults();
+			}
+		});
+		buttonPane.add(reset, JideBoxLayout.FIX);
+		JButton cancel = new JButton("Cancel");
+		cancel.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				dispose();
+			}
+		});
+		buttonPane.add(cancel, JideBoxLayout.FIX);
+		
+		loadFromModel();
+		pack();
+		setVisible(true);
+		
+	}
+	
+	public JPanel getExternalToolsPane() {
+		CollapsiblePanel pane = new CollapsiblePanel("External tools");
+		pane.setLayout(new JideBoxLayout(pane, JideBoxLayout.PAGE_AXIS));
+		
+		//Tiled
+		CollapsiblePanel tiledPane = new CollapsiblePanel("TMX Map viewer/editor");
+		tiledPane.setLayout(new JideBoxLayout(tiledPane, JideBoxLayout.PAGE_AXIS));
+		ButtonGroup tiledRadioGroup = new ButtonGroup();
+		useSystemDefaultMapEditorButton = new JRadioButton("Use system-default TMX Map editor");
+		tiledRadioGroup.add(useSystemDefaultMapEditorButton);
+		tiledPane.add(useSystemDefaultMapEditorButton, JideBoxLayout.FIX);
+		useCustomMapEditorButton = new JRadioButton("Use custom command to open TMX Map files");
+		tiledRadioGroup.add(useCustomMapEditorButton);
+		tiledPane.add(useCustomMapEditorButton, JideBoxLayout.FIX);
+		mapEditorCommandField = new JTextField();
+		tiledPane.add(mapEditorCommandField, JideBoxLayout.FIX);
+		ActionListener tiledRadioListener = new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				if (useSystemDefaultMapEditorButton.equals(e.getSource())) {
+					mapEditorCommandField.setEnabled(false);
+				} else if (useCustomMapEditorButton.equals(e.getSource())) {
+					mapEditorCommandField.setEnabled(true);
+				}
+			}
+		};
+		useSystemDefaultMapEditorButton.addActionListener(tiledRadioListener);
+		useCustomMapEditorButton.addActionListener(tiledRadioListener);
+		pane.add(tiledPane, JideBoxLayout.FIX);
+		
+		//Images
+		CollapsiblePanel imgPane = new CollapsiblePanel("Image viewer/editor");
+		imgPane.setLayout(new JideBoxLayout(imgPane, JideBoxLayout.PAGE_AXIS));
+		ButtonGroup imgRadioGroup = new ButtonGroup();
+		useSystemDefaultImageViewerButton = new JRadioButton("Use system-default image viewer");
+		imgRadioGroup.add(useSystemDefaultImageViewerButton);
+		imgPane.add(useSystemDefaultImageViewerButton, JideBoxLayout.FIX);
+		useSystemDefaultImageEditorButton = new JRadioButton("Use system-default image editor");
+		imgRadioGroup.add(useSystemDefaultImageEditorButton);
+		imgPane.add(useSystemDefaultImageEditorButton, JideBoxLayout.FIX);
+		useCustomImageEditorButton = new JRadioButton("Use custom command to open images");
+		imgRadioGroup.add(useCustomImageEditorButton);
+		imgPane.add(useCustomImageEditorButton, JideBoxLayout.FIX);
+		imageEditorCommandField = new JTextField();
+		imgPane.add(imageEditorCommandField, JideBoxLayout.FIX);
+		ActionListener imgRadioListener = new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				if (useSystemDefaultMapEditorButton.equals(e.getSource())) {
+					imageEditorCommandField.setEnabled(false);
+				} else if (useSystemDefaultImageViewerButton.equals(e.getSource())) {
+					imageEditorCommandField.setEnabled(false);
+				} else if (useCustomImageEditorButton.equals(e.getSource())) {
+					imageEditorCommandField.setEnabled(true);
+				}
+			}
+		};
+		useSystemDefaultImageViewerButton.addActionListener(imgRadioListener);
+		useSystemDefaultImageEditorButton.addActionListener(imgRadioListener);
+		useCustomImageEditorButton.addActionListener(imgRadioListener);
+		pane.add(imgPane, JideBoxLayout.FIX);
+		
+		pane.expand();
+		return pane;
+	}
+	
+	public void loadFromModel() {
+		//Tiled
+		useSystemDefaultMapEditorButton.setSelected(settings.useSystemDefaultMapEditor.getCurrentValue());
+		useCustomMapEditorButton.setSelected(!settings.useSystemDefaultMapEditor.getCurrentValue());
+		mapEditorCommandField.setText(settings.mapEditorCommand.getCurrentValue());
+		//Images
+		useSystemDefaultImageViewerButton.setSelected(settings.useSystemDefaultImageViewer.getCurrentValue());
+		useSystemDefaultImageEditorButton.setSelected(settings.useSystemDefaultImageEditor.getCurrentValue());
+		useCustomImageEditorButton.setSelected(!(settings.useSystemDefaultImageViewer.getCurrentValue() || settings.useSystemDefaultImageEditor.getCurrentValue()));
+		imageEditorCommandField.setText(settings.imageEditorCommand.getCurrentValue());
+	}
+	
+	public void pushToModel() {
+		//Tiled
+		settings.useSystemDefaultMapEditor.setCurrentValue(useSystemDefaultMapEditorButton.isSelected());
+		settings.mapEditorCommand.setCurrentValue(mapEditorCommandField.getText());
+		//Images
+		settings.useSystemDefaultImageViewer.setCurrentValue(useSystemDefaultImageViewerButton.isSelected());
+		settings.useSystemDefaultImageEditor.setCurrentValue(useSystemDefaultImageEditorButton.isSelected());
+		settings.imageEditorCommand.setCurrentValue(imageEditorCommandField.getText());
+		
+		settings.save();
+	}
+	
+	public void resetDefaults() {
+		settings.resetDefault();
+		settings.save();
+		loadFromModel();
+	}
+
+}

src/com/gpl/rpg/atcontentstudio/ui/WorldmapCreationWizard.java

@@ -7,6 +7,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.JButton;
 import javax.swing.JDialog;
@@ -144,7 +145,7 @@ public class WorldmapCreationWizard extends JDialog {
 		public void segmentCreated(WorldmapSegment created);
 	}
 	
-	private List<CreationCompletedListener> listeners = new ArrayList<WorldmapCreationWizard.CreationCompletedListener>();
+	private List<CreationCompletedListener> listeners = new CopyOnWriteArrayList<WorldmapCreationWizard.CreationCompletedListener>();
 	
 	public void addCreationListener(CreationCompletedListener l) {
 		listeners.add(l);

src/com/gpl/rpg/atcontentstudio/ui/WorldmapLabelEditionWizard.java

@@ -7,6 +7,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.JButton;
 import javax.swing.JDialog;
@@ -176,7 +177,7 @@ public class WorldmapLabelEditionWizard extends JDialog {
 		public void labelCreated(WorldmapSegment.NamedArea created);
 	}
 	
-	private List<CreationCompletedListener> listeners = new ArrayList<WorldmapLabelEditionWizard.CreationCompletedListener>();
+	private List<CreationCompletedListener> listeners = new CopyOnWriteArrayList<WorldmapLabelEditionWizard.CreationCompletedListener>();
 	
 	public void addCreationListener(CreationCompletedListener l) {
 		listeners.add(l);

src/com/gpl/rpg/atcontentstudio/ui/gamedataeditors/DialogueEditor.java

@@ -12,6 +12,7 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.ImageIcon;
@@ -752,7 +753,7 @@ public class DialogueEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -917,7 +918,7 @@ public class DialogueEditor extends JSONElementEditor {
 		}
 
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -1031,7 +1032,7 @@ public class DialogueEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {

src/com/gpl/rpg/atcontentstudio/ui/gamedataeditors/DroplistEditor.java

@@ -5,6 +5,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.ImageIcon;
@@ -196,7 +197,7 @@ public class DroplistEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {

src/com/gpl/rpg/atcontentstudio/ui/gamedataeditors/ItemEditor.java

@@ -5,7 +5,9 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
+import javax.swing.ButtonGroup;
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.ImageIcon;
 import javax.swing.JButton;
@@ -14,6 +16,7 @@ import javax.swing.JComponent;
 import javax.swing.JLabel;
 import javax.swing.JList;
 import javax.swing.JPanel;
+import javax.swing.JRadioButton;
 import javax.swing.JScrollPane;
 import javax.swing.JSpinner;
 import javax.swing.JTextField;
@@ -97,6 +100,8 @@ public class ItemEditor extends JSONElementEditor {
 	@SuppressWarnings("rawtypes")
 	private JList hitSourceConditionsList;
 	private MyComboBox hitSourceConditionBox;
+	private JRadioButton hitSourceConditionClear;
+	private JRadioButton hitSourceConditionApply;
 	private JSpinner hitSourceConditionMagnitude;
 	private JSpinner hitSourceConditionDuration;
 	private JSpinner hitSourceConditionChance;
@@ -104,6 +109,8 @@ public class ItemEditor extends JSONElementEditor {
 	@SuppressWarnings("rawtypes")
 	private JList hitTargetConditionsList;
 	private MyComboBox hitTargetConditionBox;
+	private JRadioButton hitTargetConditionClear;
+	private JRadioButton hitTargetConditionApply;
 	private JSpinner hitTargetConditionMagnitude;
 	private JSpinner hitTargetConditionDuration;
 	private JSpinner hitTargetConditionChance;
@@ -118,6 +125,8 @@ public class ItemEditor extends JSONElementEditor {
 	@SuppressWarnings("rawtypes")
 	private JList killSourceConditionsList;
 	private MyComboBox killSourceConditionBox;
+	private JRadioButton killSourceConditionClear;
+	private JRadioButton killSourceConditionApply;
 	private JSpinner killSourceConditionMagnitude;
 	private JSpinner killSourceConditionDuration;
 	private JSpinner killSourceConditionChance;
@@ -460,55 +469,169 @@ public class ItemEditor extends JSONElementEditor {
 		
 	}
 	
-	public void updateHitSourceTimedConditionEditorPane(JPanel pane, Item.TimedConditionEffect condition, FieldUpdateListener listener) {
+	public void updateHitSourceTimedConditionEditorPane(JPanel pane, Item.TimedConditionEffect condition, final FieldUpdateListener listener) {
 		pane.removeAll();
 		if (hitSourceConditionBox != null) {
 			removeElementListener(hitSourceConditionBox);
 		}
+		if (condition == null) {
+			pane.revalidate();
+			pane.repaint();
+			return;
+		}
+		
 		boolean writable = ((Item)target).writable;
 		Project proj = ((Item)target).getProject();
 		
 		hitSourceConditionBox = addActorConditionBox(pane, proj, "Actor Condition: ", condition.condition, writable, listener);
-		hitSourceConditionMagnitude = addIntegerField(pane, "Magnitude: ", condition.magnitude, false, writable, listener);
-		hitSourceConditionDuration = addIntegerField(pane, "Duration: ", condition.duration, false, writable, listener);
 		hitSourceConditionChance = addDoubleField(pane, "Chance: ", condition.chance, writable, listener);
+		hitSourceConditionApply = new JRadioButton("Apply new condition");
+		pane.add(hitSourceConditionApply, JideBoxLayout.FIX);
+		hitSourceConditionMagnitude = addIntegerField(pane, "Magnitude: ", condition.magnitude == null ? null : condition.magnitude >= 0 ? condition.magnitude : 0, false, writable, listener);
+		hitSourceConditionDuration = addIntegerField(pane, "Duration: ", condition.duration, false, writable, listener);
+		hitSourceConditionClear = new JRadioButton("Clear active condition");
+		pane.add(hitSourceConditionClear, JideBoxLayout.FIX);
+		
+		ButtonGroup radioGroup = new ButtonGroup();
+		radioGroup.add(hitSourceConditionApply);
+		radioGroup.add(hitSourceConditionClear);
+		
+		if (condition != null && condition.magnitude != null && condition.magnitude == ActorCondition.CLEAR_AC_MAGNITUDE) {
+			hitSourceConditionClear.setSelected(true);
+			hitSourceConditionApply.setSelected(false);
+			hitSourceConditionMagnitude.setEnabled(false);
+			hitSourceConditionDuration.setEnabled(false);
+		} else {
+			hitSourceConditionClear.setSelected(false);
+			hitSourceConditionApply.setSelected(true);
+			hitSourceConditionMagnitude.setEnabled(true);
+			hitSourceConditionDuration.setEnabled(true);
+		}
+		
+		hitSourceConditionClear.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				listener.valueChanged(hitSourceConditionClear, new Boolean(hitSourceConditionClear.isSelected()));
+			}
+		});
+		hitSourceConditionApply.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				listener.valueChanged(hitSourceConditionApply, new Boolean(hitSourceConditionApply.isSelected()));
+			}
+		});
 		
 		pane.revalidate();
 		pane.repaint();
 	}
 
-	public void updateHitTargetTimedConditionEditorPane(JPanel pane, Item.TimedConditionEffect condition, FieldUpdateListener listener) {
+	public void updateHitTargetTimedConditionEditorPane(JPanel pane, Item.TimedConditionEffect condition, final FieldUpdateListener listener) {
 		pane.removeAll();
 		if (hitTargetConditionBox != null) {
 			removeElementListener(hitTargetConditionBox);
 		}
+		if (condition == null) {
+			pane.revalidate();
+			pane.repaint();
+			return;
+		}
 		
 		boolean writable = ((Item)target).writable;
 		Project proj = ((Item)target).getProject();
 
 		hitTargetConditionBox = addActorConditionBox(pane, proj, "Actor Condition: ", condition.condition, writable, listener);
-		hitTargetConditionMagnitude = addIntegerField(pane, "Magnitude: ", condition.magnitude, false, writable, listener);
-		hitTargetConditionDuration = addIntegerField(pane, "Duration: ", condition.duration, false, writable, listener);
 		hitTargetConditionChance = addDoubleField(pane, "Chance: ", condition.chance, writable, listener);
-
+		hitTargetConditionApply = new JRadioButton("Apply new condition");
+		pane.add(hitTargetConditionApply, JideBoxLayout.FIX);
+		hitTargetConditionMagnitude = addIntegerField(pane, "Magnitude: ", condition.magnitude == null ? null : condition.magnitude >= 0 ? condition.magnitude : 0, false, writable, listener);
+		hitTargetConditionDuration = addIntegerField(pane, "Duration: ", condition.duration, false, writable, listener);
+		hitTargetConditionClear = new JRadioButton("Clear active condition");
+		pane.add(hitTargetConditionClear, JideBoxLayout.FIX);
+		
+		ButtonGroup radioGroup = new ButtonGroup();
+		radioGroup.add(hitTargetConditionApply);
+		radioGroup.add(hitTargetConditionClear);
+		
+		if (condition != null && condition.magnitude != null && condition.magnitude == ActorCondition.CLEAR_AC_MAGNITUDE) {
+			hitTargetConditionClear.setSelected(true);
+			hitTargetConditionApply.setSelected(false);
+			hitTargetConditionMagnitude.setEnabled(false);
+			hitTargetConditionDuration.setEnabled(false);
+		} else {
+			hitTargetConditionClear.setSelected(false);
+			hitTargetConditionApply.setSelected(true);
+			hitTargetConditionMagnitude.setEnabled(true);
+			hitTargetConditionDuration.setEnabled(true);
+		}
+		
+		hitTargetConditionClear.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				listener.valueChanged(hitTargetConditionClear, new Boolean(hitTargetConditionClear.isSelected()));
+			}
+		});
+		hitTargetConditionApply.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				listener.valueChanged(hitTargetConditionApply, new Boolean(hitTargetConditionApply.isSelected()));
+			}
+		});
+		
 		pane.revalidate();
 		pane.repaint();
 	}
 
-	public void updateKillSourceTimedConditionEditorPane(JPanel pane, Item.TimedConditionEffect condition, FieldUpdateListener listener) {
+	public void updateKillSourceTimedConditionEditorPane(JPanel pane, Item.TimedConditionEffect condition, final FieldUpdateListener listener) {
 		pane.removeAll();
 		if (killSourceConditionBox != null) {
 			removeElementListener(killSourceConditionBox);
 		}
+		if (condition == null) {
+			pane.revalidate();
+			pane.repaint();
+			return;
+		}
 		
 		boolean writable = ((Item)target).writable;
 		Project proj = ((Item)target).getProject();
 
 		killSourceConditionBox = addActorConditionBox(pane, proj, "Actor Condition: ", condition.condition, writable, listener);
-		killSourceConditionMagnitude = addIntegerField(pane, "Magnitude: ", condition.magnitude, false, writable, listener);
-		killSourceConditionDuration = addIntegerField(pane, "Duration: ", condition.duration, false, writable, listener);
 		killSourceConditionChance = addDoubleField(pane, "Chance: ", condition.chance, writable, listener);
-
+		killSourceConditionApply = new JRadioButton("Apply new condition");
+		pane.add(killSourceConditionApply, JideBoxLayout.FIX);
+		killSourceConditionMagnitude = addIntegerField(pane, "Magnitude: ", condition.magnitude == null ? null : condition.magnitude >= 0 ? condition.magnitude : 0, false, writable, listener);
+		killSourceConditionDuration = addIntegerField(pane, "Duration: ", condition.duration, false, writable, listener);
+		killSourceConditionClear = new JRadioButton("Clear active condition");
+		pane.add(killSourceConditionClear, JideBoxLayout.FIX);
+		
+		ButtonGroup radioGroup = new ButtonGroup();
+		radioGroup.add(killSourceConditionApply);
+		radioGroup.add(killSourceConditionClear);
+		
+		if (condition != null && condition.magnitude != null && condition.magnitude == ActorCondition.CLEAR_AC_MAGNITUDE) {
+			killSourceConditionClear.setSelected(true);
+			killSourceConditionApply.setSelected(false);
+			killSourceConditionMagnitude.setEnabled(false);
+			killSourceConditionDuration.setEnabled(false);
+		} else {
+			killSourceConditionClear.setSelected(false);
+			killSourceConditionApply.setSelected(true);
+			killSourceConditionMagnitude.setEnabled(true);
+			killSourceConditionDuration.setEnabled(true);
+		}
+		
+		killSourceConditionClear.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				listener.valueChanged(killSourceConditionClear, new Boolean(killSourceConditionClear.isSelected()));
+			}
+		});
+		killSourceConditionApply.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				listener.valueChanged(killSourceConditionApply, new Boolean(killSourceConditionApply.isSelected()));
+			}
+		});
 		pane.revalidate();
 		pane.repaint();
 	}
@@ -518,6 +641,11 @@ public class ItemEditor extends JSONElementEditor {
 		if (equipConditionBox != null) {
 			removeElementListener(equipConditionBox);
 		}
+		if (condition == null) {
+			pane.revalidate();
+			pane.repaint();
+			return;
+		}
 		
 		boolean writable = ((Item)target).writable;
 		Project proj = ((Item)target).getProject();
@@ -578,7 +706,7 @@ public class ItemEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -640,7 +768,7 @@ public class ItemEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -665,7 +793,11 @@ public class ItemEditor extends JSONElementEditor {
 				
 				if (effect.condition != null) {
 					label.setIcon(new ImageIcon(effect.condition.getIcon()));
-					label.setText(effect.chance+"% chances to give "+effect.duration+" rounds of "+effect.condition.getDesc()+" x"+effect.magnitude);
+					if (effect.magnitude == ActorCondition.CLEAR_AC_MAGNITUDE) {
+						label.setText(effect.chance+"% chances to clear "+effect.condition.getDesc());
+					} else {
+						label.setText(effect.chance+"% chances to give "+effect.duration+" rounds of "+effect.condition.getDesc()+" x"+effect.magnitude);
+					}
 				} else {
 					label.setText("New, undefined actor condition effect.");
 				}
@@ -723,7 +855,7 @@ public class ItemEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -983,6 +1115,20 @@ public class ItemEditor extends JSONElementEditor {
 				}
 				hitSourceConditionsModel.itemChanged(selectedHitEffectSourceCondition);
 				updateHit = true;
+			} else if (source == hitSourceConditionClear) {
+				selectedHitEffectSourceCondition.magnitude = ActorCondition.CLEAR_AC_MAGNITUDE;
+				selectedHitEffectSourceCondition.duration = null;
+				hitSourceConditionMagnitude.setEnabled(false);
+				hitSourceConditionDuration.setEnabled(false);
+				hitSourceConditionsModel.itemChanged(selectedHitEffectSourceCondition);
+				updateHit = true;
+			}  else if (source == hitSourceConditionApply) {
+				selectedHitEffectSourceCondition.magnitude = 0;
+				selectedHitEffectSourceCondition.duration = 0;
+				hitSourceConditionMagnitude.setEnabled(true);
+				hitSourceConditionDuration.setEnabled(true);
+				hitSourceConditionsModel.itemChanged(selectedHitEffectSourceCondition);
+				updateHit = true;
 			} else if (source == hitSourceConditionMagnitude) {
 				selectedHitEffectSourceCondition.magnitude = (Integer) value;
 				hitSourceConditionsModel.itemChanged(selectedHitEffectSourceCondition);
@@ -1010,6 +1156,20 @@ public class ItemEditor extends JSONElementEditor {
 				}
 				hitTargetConditionsModel.itemChanged(selectedHitEffectTargetCondition);
 				updateHit = true;
+			} else if (source == hitTargetConditionClear) {
+				selectedHitEffectTargetCondition.magnitude = ActorCondition.CLEAR_AC_MAGNITUDE;
+				selectedHitEffectTargetCondition.duration = null;
+				hitTargetConditionMagnitude.setEnabled(false);
+				hitTargetConditionDuration.setEnabled(false);
+				hitTargetConditionsModel.itemChanged(selectedHitEffectTargetCondition);
+				updateHit = true;
+			}  else if (source == hitTargetConditionApply) {
+				selectedHitEffectTargetCondition.magnitude = 0;
+				selectedHitEffectTargetCondition.duration = 0;
+				hitTargetConditionMagnitude.setEnabled(true);
+				hitTargetConditionDuration.setEnabled(true);
+				hitTargetConditionsModel.itemChanged(selectedHitEffectTargetCondition);
+				updateHit = true;
 			} else if (source == hitTargetConditionMagnitude) {
 				selectedHitEffectTargetCondition.magnitude = (Integer) value;
 				hitTargetConditionsModel.itemChanged(selectedHitEffectTargetCondition);
@@ -1053,6 +1213,20 @@ public class ItemEditor extends JSONElementEditor {
 				}
 				killSourceConditionsModel.itemChanged(selectedKillEffectCondition);
 				updateKill = true;
+			} else if (source == killSourceConditionClear) {
+				selectedKillEffectCondition.magnitude = ActorCondition.CLEAR_AC_MAGNITUDE;
+				selectedKillEffectCondition.duration = null;
+				killSourceConditionMagnitude.setEnabled(false);
+				killSourceConditionDuration.setEnabled(false);
+				killSourceConditionsModel.itemChanged(selectedKillEffectCondition);
+				updateKill = true;
+			}  else if (source == killSourceConditionApply) {
+				selectedKillEffectCondition.magnitude = 0;
+				selectedKillEffectCondition.duration = 0;
+				killSourceConditionMagnitude.setEnabled(true);
+				killSourceConditionDuration.setEnabled(true);
+				killSourceConditionsModel.itemChanged(selectedKillEffectCondition);
+				updateKill = true;
 			} else if (source == killSourceConditionMagnitude) {
 				selectedKillEffectCondition.magnitude = (Integer) value;
 				killSourceConditionsModel.itemChanged(selectedKillEffectCondition);

src/com/gpl/rpg/atcontentstudio/ui/gamedataeditors/NPCEditor.java

@@ -6,6 +6,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.ImageIcon;
@@ -397,7 +398,7 @@ public class NPCEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -459,7 +460,7 @@ public class NPCEditor extends JSONElementEditor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {

src/com/gpl/rpg/atcontentstudio/ui/gamedataeditors/QuestEditor.java

@@ -6,6 +6,7 @@ import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.BorderFactory;
 import javax.swing.ImageIcon;
@@ -293,7 +294,7 @@ public class QuestEditor extends JSONElementEditor {
 			if (quest.stages.isEmpty()) quest.stages = null;
 		}
 		
-		public List<TableModelListener> listeners = new ArrayList<TableModelListener>();
+		public List<TableModelListener> listeners = new CopyOnWriteArrayList<TableModelListener>();
 		
 		@Override
 		public void addTableModelListener(TableModelListener l) {

src/com/gpl/rpg/atcontentstudio/ui/map/TMXMapEditor.java

@@ -18,11 +18,12 @@ import java.awt.event.MouseAdapter;
 import java.awt.event.MouseEvent;
 import java.awt.event.MouseMotionAdapter;
 import java.awt.event.MouseMotionListener;
-import java.io.IOException;
+import java.io.File;
 import java.util.ArrayList;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.BorderFactory;
 import javax.swing.ComboBoxModel;
@@ -35,6 +36,7 @@ import javax.swing.JComboBox;
 import javax.swing.JComponent;
 import javax.swing.JLabel;
 import javax.swing.JList;
+import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JScrollPane;
 import javax.swing.JSpinner;
@@ -99,16 +101,20 @@ import com.gpl.rpg.atcontentstudio.ui.Editor;
 import com.gpl.rpg.atcontentstudio.ui.FieldUpdateListener;
 import com.gpl.rpg.atcontentstudio.ui.IntegerBasedCheckBox;
 import com.gpl.rpg.atcontentstudio.ui.ScrollablePanel;
+import com.gpl.rpg.atcontentstudio.utils.DesktopIntegration;
+import com.gpl.rpg.atcontentstudio.utils.FileUtils;
 import com.jidesoft.swing.JideBoxLayout;
 import com.jidesoft.swing.JideTabbedPane;
 
-public class TMXMapEditor extends Editor {
+public class TMXMapEditor extends Editor implements TMXMap.MapChangedOnDiskListener{
 
 	private static final long serialVersionUID = -3079451876618342442L;
 
 
 	Map<String, JPanel> editorTabs = new LinkedHashMap<String, JPanel>();
 	JideTabbedPane editorTabsHolder;
+
+	private JButton reload;
 	
 	private RSyntaxTextArea editorPane;
 	
@@ -125,7 +131,7 @@ public class TMXMapEditor extends Editor {
 	
 	private JPanel layerDetailsPane;
 	private BooleanBasedCheckBox layerVisibleBox;
-	//private BooleanBasedCheckBox activeLayerBox;
+	private JCheckBox groupActiveForNewGame;
 	private JTextField layerNameField;
 	private MapObjectsListModel groupObjectsListModel;
 	@SuppressWarnings("rawtypes")
@@ -154,7 +160,7 @@ public class TMXMapEditor extends Editor {
 	@SuppressWarnings("rawtypes")
 	private JComboBox evaluateTriggerBox;
 	private JSpinner quantityField;
-	private JCheckBox activeForNewGame;
+	private JCheckBox spawnActiveForNewGame;
 	private JTextField spawngroupField;
 	@SuppressWarnings("rawtypes")
 	private JList npcList;
@@ -188,6 +194,7 @@ public class TMXMapEditor extends Editor {
 		this.name = map.getDesc();
 		this.icon = new ImageIcon(DefaultIcons.getTiledIconIcon());
 		
+		map.addMapChangedOnDiskListener(this);
 		
 		setLayout(new BorderLayout());
 		editorTabsHolder = new JideTabbedPane(JideTabbedPane.BOTTOM);
@@ -325,7 +332,7 @@ public class TMXMapEditor extends Editor {
 					break;
 				}
 			}
-			activeForNewGame = addBooleanBasedCheckBox(groupDetailPane, "Active for new game", objGroup.active, map.writable, listener);
+			groupActiveForNewGame = addBooleanBasedCheckBox(groupDetailPane, "Active for new game", objGroup.active, map.writable, listener);
 			groupObjectsListModel = new MapObjectsListModel(objGroup);
 			groupObjectsList = new JList(groupObjectsListModel);
 			groupObjectsList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
@@ -569,7 +576,7 @@ public class TMXMapEditor extends Editor {
 			areaField = addTextField(pane, "Spawn area ID: ", ((SpawnArea)selected).name, ((TMXMap)target).writable, listener);
 			spawngroupField = addTextField(pane, "Spawn group ID: ", ((SpawnArea)selected).spawngroup_id, ((TMXMap)target).writable, listener);
 			quantityField = addIntegerField(pane, "Number of spawned NPCs: ", ((SpawnArea)selected).quantity, false, ((TMXMap)target).writable, listener);
-			activeForNewGame = addBooleanBasedCheckBox(pane, "Active in a new game: ", ((SpawnArea)selected).active, ((TMXMap)target).writable, listener);
+			spawnActiveForNewGame = addBooleanBasedCheckBox(pane, "Active in a new game: ", ((SpawnArea)selected).active, ((TMXMap)target).writable, listener);
 			npcListModel = new SpawnGroupNpcListModel((SpawnArea) selected);
 			npcList = new JList(npcListModel);
 			npcList.setCellRenderer(new GDERenderer(true, ((TMXMap)target).writable));
@@ -886,7 +893,7 @@ public class TMXMapEditor extends Editor {
 			return index;
 		}
 		
-		List<TreeModelListener> listeners = new ArrayList<TreeModelListener>();
+		List<TreeModelListener> listeners = new CopyOnWriteArrayList<TreeModelListener>();
 
 		@Override
 		public void addTreeModelListener(TreeModelListener l) {
@@ -995,7 +1002,7 @@ public class TMXMapEditor extends Editor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -1074,7 +1081,7 @@ public class TMXMapEditor extends Editor {
 			}
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -1146,7 +1153,7 @@ public class TMXMapEditor extends Editor {
 			return availableLayers.size();
 		}
 		
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		@Override
 		public void addListDataListener(ListDataListener l) {
 			listeners.add(l);
@@ -1202,7 +1209,7 @@ public class TMXMapEditor extends Editor {
 			}
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -1247,7 +1254,7 @@ public class TMXMapEditor extends Editor {
 			return area.spawnGroup.get(index);
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -1529,7 +1536,7 @@ public class TMXMapEditor extends Editor {
 			return null;
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -1600,22 +1607,44 @@ public class TMXMapEditor extends Editor {
 	}
 
 	public JButton createButtonPane(JPanel pane, final Project proj, final TMXMap map, final FieldUpdateListener listener) {
-		final JButton gdeIcon = new JButton(new ImageIcon(DefaultIcons.getTiledIconImage()));
 		JPanel savePane = new JPanel();
-		savePane.add(gdeIcon, JideBoxLayout.FIX);
 		savePane.setLayout(new JideBoxLayout(savePane, JideBoxLayout.LINE_AXIS, 6));
+		final JButton gdeIcon = new JButton(new ImageIcon(DefaultIcons.getTiledIconImage()));
+		savePane.add(gdeIcon, JideBoxLayout.FIX);
 		if (map.writable) {
 			gdeIcon.addActionListener(new ActionListener() {
 				@Override
 				public void actionPerformed(ActionEvent e) {
-					try {
-						Runtime.getRuntime().exec(new String[]{"tiled",map.tmxFile.getAbsolutePath()});
-					} catch (IOException e1) {
-						e1.printStackTrace();
+					if (map.state == GameDataElement.State.modified || map.state == GameDataElement.State.created) {
+						int confirm = JOptionPane.showConfirmDialog(TMXMapEditor.this, "You have unsaved changes in ATCS.\nYou'd better save your changes in ATCS before opening this map with the external editor.\nDo you want to save before opening the file?", "Save before opening?", JOptionPane.YES_NO_CANCEL_OPTION);
+						if (confirm == JOptionPane.CANCEL_OPTION) return;
+						if (confirm == JOptionPane.YES_OPTION) {
+							map.save();
+							ATContentStudio.frame.nodeChanged(map);
+						}
 					}
+					DesktopIntegration.openTmxMap(map.tmxFile);
+				}
+			});
+			reload = new JButton("Reload");
+			reload.setEnabled(map.changedOnDisk);
+			savePane.add(reload, JideBoxLayout.FIX);
+			reload.addActionListener(new ActionListener() {
+				
+				@Override
+				public void actionPerformed(ActionEvent e) {
+					if (map.state == GameDataElement.State.modified) {
+						int confirm = JOptionPane.showConfirmDialog(TMXMapEditor.this, "You modified this map in ATCS. All ATCS-made changes will be lost if you confirm.\n On the other hand, if you save using ATCS, all external changes will be lost.\n Do you want to reload?", "Confirm reload?", JOptionPane.OK_CANCEL_OPTION);
+						if (confirm == JOptionPane.CANCEL_OPTION) return;
+					}
+					reload.setEnabled(false);
+					(new Thread(){
+						public void run() {
+							map.reload();
+						}
+					}).start();
 				}
 			});
-			
 			if (map.getDataType() == GameSource.Type.altered) {
 				savePane.add(message = new JLabel(ALTERED_MESSAGE), JideBoxLayout.FIX);
 			} else if (map.getDataType() == GameSource.Type.created) {
@@ -1626,6 +1655,16 @@ public class TMXMapEditor extends Editor {
 				@Override
 				public void actionPerformed(ActionEvent e) {
 					if (map.state != TMXMap.State.saved) { 
+						if (map.changedOnDisk) {
+							int confirm = JOptionPane.showConfirmDialog(TMXMapEditor.this, "You modified this map in an external tool. All external changes will be lost if you confirm.\n On the other hand, if you reload in ATCS, all ATCS-made changes will be lost.\n Do you want to save?", "Confirm save?", JOptionPane.OK_CANCEL_OPTION);
+							if (confirm == JOptionPane.CANCEL_OPTION) return;
+							File backup = FileUtils.backupFile(map.tmxFile); 
+							if (backup != null) {
+								JOptionPane.showMessageDialog(TMXMapEditor.this, "The externally-modified file was backed up as "+backup.getAbsolutePath(), "File backed up", JOptionPane.INFORMATION_MESSAGE);
+							} else {
+								JOptionPane.showMessageDialog(TMXMapEditor.this, "The externally-modified file could not be backed up.", "File backup failed", JOptionPane.ERROR_MESSAGE);
+							}
+						}
 						map.save();
 						ATContentStudio.frame.nodeChanged(map);
 					}
@@ -1736,9 +1775,9 @@ public class TMXMapEditor extends Editor {
 				modified = false;
 				tmxViewer.revalidate();
 				tmxViewer.repaint();
-			}  else if (source == activeForNewGame) {
+			}  else if (source == groupActiveForNewGame) {
 				if (selectedLayer instanceof tiled.core.ObjectGroup) {
-					map.getGroup((tiled.core.ObjectGroup) selectedLayer).active = activeForNewGame.isSelected();
+					map.getGroup((tiled.core.ObjectGroup) selectedLayer).active = groupActiveForNewGame.isSelected();
 				}
 				modified = true;
 			} else if (source == layerList) {
@@ -1865,7 +1904,7 @@ public class TMXMapEditor extends Editor {
 					SpawnArea area = (SpawnArea) selectedMapObject;
 					area.quantity = (Integer) value;
 				}
-			} else if (source == activeForNewGame) {
+			} else if (source == spawnActiveForNewGame) {
 				if (selectedMapObject instanceof SpawnArea) {
 					SpawnArea area = (SpawnArea) selectedMapObject;
 					area.active = (Boolean) value;
@@ -2294,5 +2333,23 @@ public class TMXMapEditor extends Editor {
 		g2d.fillRect(object.x + 2, object.y + 2, img.getWidth(null), img.getHeight(null));
 		g2d.drawImage(object.getIcon(), object.x + 2, object.y + 2, null);
     }
+
+
+
+	@Override
+	public void mapChanged() {
+		if (reload != null) reload.setEnabled(true);
+	}
+
+
+
+	@Override
+	public void mapReloaded() {
+		ATContentStudio.frame.nodeChanged(target);
+		((TMXMap)target).removeMapChangedOnDiskListener(this);
+		ATContentStudio.frame.closeEditor(target);
+		ATContentStudio.frame.openEditor(target);
+		
+	}
 	
 }

src/com/gpl/rpg/atcontentstudio/ui/sprites/SpriteChooser.java

@@ -35,13 +35,26 @@ public class SpriteChooser extends JDialog {
 	private static final int MAX_PER_ROW = 10;
 	
 	public static Map<Project, Map<Spritesheet.Category, SpriteChooser>> cache = new LinkedHashMap<Project, Map<Spritesheet.Category,SpriteChooser>>();
-
+	public static Map<Project, Map<Spritesheet.Category, List<Spritesheet>>> cacheValidator = new LinkedHashMap<Project, Map<Category,List<Spritesheet>>>();
+	
+	
 	public static SpriteChooser getChooser(Project proj, Spritesheet.Category category) {
 		if (cache.get(proj) == null) {
 			cache.put(proj, new LinkedHashMap<Spritesheet.Category, SpriteChooser>());
 		}
 		if (cache.get(proj).get(category) == null) {
 			cache.get(proj).put(category, new SpriteChooser(proj, category));
+		} else {
+			List<Spritesheet> spritesheets = new ArrayList<Spritesheet>();
+			for (int i=0; i<proj.getSpritesheetCount(); i++) {
+				Spritesheet sheet = proj.getSpritesheet(i);
+				if (sheet.category == category) {
+					spritesheets.add(sheet);
+				}
+			}
+			if ( !spritesheets.equals(cacheValidator.get(proj).get(category)) ) {
+				cache.get(proj).put(category, new SpriteChooser(proj, category));
+			}
 		}
 		SpriteChooser wanted = cache.get(proj).get(category);
 		wanted.group.clearSelection();
@@ -65,11 +78,16 @@ public class SpriteChooser extends JDialog {
 		setTitle("Select a sprite");
 		setModalityType(ModalityType.APPLICATION_MODAL);
 		List<Spritesheet> spritesheets = new ArrayList<Spritesheet>();
-		for (Spritesheet sheet : proj.baseContent.gameSprites.spritesheets) {
+		for (int i=0; i<proj.getSpritesheetCount(); i++) {
+			Spritesheet sheet = proj.getSpritesheet(i);
 			if (sheet.category == category) {
 				spritesheets.add(sheet);
 			}
 		}
+		if (cacheValidator.get(proj) == null) {
+			cacheValidator.put(proj, new LinkedHashMap<Spritesheet.Category, List<Spritesheet>>());
+		}
+		cacheValidator.get(proj).put(category, spritesheets);
 		
 		
 		JPanel pane = new JPanel();

src/com/gpl/rpg/atcontentstudio/ui/sprites/SpritesheetEditor.java

@@ -4,6 +4,8 @@ import java.awt.BorderLayout;
 import java.awt.Color;
 import java.awt.Component;
 import java.awt.Image;
+import java.awt.event.ActionEvent;
+import java.awt.event.ActionListener;
 import java.awt.event.KeyAdapter;
 import java.awt.event.KeyEvent;
 import java.awt.event.MouseAdapter;
@@ -13,10 +15,12 @@ import java.util.Enumeration;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.BorderFactory;
 import javax.swing.DefaultListCellRenderer;
 import javax.swing.ImageIcon;
+import javax.swing.JButton;
 import javax.swing.JCheckBox;
 import javax.swing.JComboBox;
 import javax.swing.JComponent;
@@ -41,8 +45,10 @@ import com.gpl.rpg.atcontentstudio.model.GameDataElement;
 import com.gpl.rpg.atcontentstudio.model.ProjectTreeNode;
 import com.gpl.rpg.atcontentstudio.model.maps.TMXMap;
 import com.gpl.rpg.atcontentstudio.model.sprites.Spritesheet;
+import com.gpl.rpg.atcontentstudio.ui.DefaultIcons;
 import com.gpl.rpg.atcontentstudio.ui.Editor;
 import com.gpl.rpg.atcontentstudio.ui.FieldUpdateListener;
+import com.gpl.rpg.atcontentstudio.utils.DesktopIntegration;
 import com.jidesoft.swing.JideBoxLayout;
 import com.jidesoft.swing.JideTabbedPane;
 
@@ -64,8 +70,8 @@ public class SpritesheetEditor extends Editor {
 	public static JComponent getWarningLabel() {
 		JLabel label = new JLabel(
 				"<html><i>" +
-				"The data presented here is not part of the game.<br/>" +
-				"What you change here will be changed in your ATCS project.<br/>" +
+				"The data accompamying the image here is not part of the game.<br/>" +
+				"What you change here will be changed in your ATCS project only.<br/>" +
 				"None of this is exported to JSON or TMX, although it must be set correctly in order to choose tiles & icons correctly.<br/>" +
 				"</i></html>");
 		return label;
@@ -83,7 +89,19 @@ public class SpritesheetEditor extends Editor {
 		
 		pane.setLayout(new JideBoxLayout(pane, JideBoxLayout.PAGE_AXIS, 6));
 
-		add(getWarningLabel(), JideBoxLayout.FIX);
+		JPanel buttonPane = new JPanel();
+		buttonPane.setLayout(new JideBoxLayout(buttonPane, JideBoxLayout.LINE_AXIS));
+		JButton openImage = new JButton(new ImageIcon(DefaultIcons.getTileLayerImage()));
+		openImage.addActionListener(new ActionListener() {
+			@Override
+			public void actionPerformed(ActionEvent e) {
+				DesktopIntegration.openImage(((Spritesheet)target).spritesheetFile);
+			}
+		});
+		buttonPane.add(openImage, JideBoxLayout.FIX);
+		buttonPane.add(getWarningLabel(), JideBoxLayout.FIX);
+		buttonPane.add(new JPanel(), JideBoxLayout.VARY);
+		pane.add(buttonPane, JideBoxLayout.FIX);
 		addLabelField(pane, "Spritesheet ID: ", sheet.id);
 		addLabelField(pane, "File: ", sheet.spritesheetFile.getAbsolutePath());
 		widthField = addIntegerField(pane, "Sprite width (px): ", sheet.spriteWidth, false, true, listener);
@@ -242,7 +260,7 @@ public class SpritesheetEditor extends Editor {
 			
 		}
 
-		List<TableModelListener> listeners = new ArrayList<TableModelListener>();
+		List<TableModelListener> listeners = new CopyOnWriteArrayList<TableModelListener>();
 		
 		@Override
 		public void addTableModelListener(TableModelListener l) {
@@ -341,7 +359,7 @@ public class SpritesheetEditor extends Editor {
 			return null;
 		}
 
-		List<ListDataListener> listeners = new ArrayList<ListDataListener>();
+		List<ListDataListener> listeners = new CopyOnWriteArrayList<ListDataListener>();
 		
 		@Override
 		public void addListDataListener(ListDataListener l) {
@@ -427,6 +445,7 @@ public class SpritesheetEditor extends Editor {
 			} else if (source == categoryBox) {
 				sheet.category = (Spritesheet.Category) value;
 			}
+			sheet.save();
 		}
 	}
 

src/com/gpl/rpg/atcontentstudio/ui/tools/ItemsTableView.java

@@ -2,6 +2,7 @@ package com.gpl.rpg.atcontentstudio.ui.tools;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.Icon;
 import javax.swing.ImageIcon;
@@ -200,7 +201,7 @@ public class ItemsTableView extends ElementTableView {
 			//not editable.
 		}
 
-		List<TableModelListener> listeners = new ArrayList<TableModelListener>();
+		List<TableModelListener> listeners = new CopyOnWriteArrayList<TableModelListener>();
 		
 		@Override
 		public void addTableModelListener(TableModelListener l) {

src/com/gpl/rpg/atcontentstudio/ui/tools/NPCsTableView.java

@@ -2,6 +2,7 @@ package com.gpl.rpg.atcontentstudio.ui.tools;
 
 import java.util.ArrayList;
 import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 
 import javax.swing.Icon;
 import javax.swing.ImageIcon;
@@ -157,7 +158,7 @@ public class NPCsTableView extends ElementTableView {
 			//not editable.
 		}
 
-		List<TableModelListener> listeners = new ArrayList<TableModelListener>();
+		List<TableModelListener> listeners = new CopyOnWriteArrayList<TableModelListener>();
 		
 		@Override
 		public void addTableModelListener(TableModelListener l) {

src/com/gpl/rpg/atcontentstudio/utils/DesktopIntegration.java

@@ -0,0 +1,67 @@
+package com.gpl.rpg.atcontentstudio.utils;
+
+import java.awt.Desktop;
+import java.io.File;
+import java.io.IOException;
+import java.util.Locale;
+
+import com.gpl.rpg.atcontentstudio.model.Workspace;
+
+public class DesktopIntegration {
+	
+	public static void openTmxMap(File f) {
+		if (Workspace.activeWorkspace.settings.useSystemDefaultMapEditor.getCurrentValue()) {
+			try {
+				Desktop.getDesktop().open(f);
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		} else {
+			try {
+				Runtime.getRuntime().exec(Workspace.activeWorkspace.settings.mapEditorCommand.getCurrentValue()+" "+f.getAbsolutePath());
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+	
+	public static void openImage(File f) {
+		if (Workspace.activeWorkspace.settings.useSystemDefaultImageViewer.getCurrentValue()) {
+			try {
+				Desktop.getDesktop().open(f);
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		} else if (Workspace.activeWorkspace.settings.useSystemDefaultImageEditor.getCurrentValue()) {
+			try {
+				Desktop.getDesktop().edit(f);
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		} else {
+			try {
+				Runtime.getRuntime().exec(Workspace.activeWorkspace.settings.imageEditorCommand.getCurrentValue()+" "+f.getAbsolutePath());
+			} catch (IOException e) {
+				e.printStackTrace();
+			}
+		}
+	}
+	
+	
+	
+	public static enum OSType {
+		Windows, MacOS, NIX, Other
+	}
+	
+	public static OSType detectedOS = detectOS();
+	
+	private static OSType detectOS() {
+		String os = System.getProperty("os.name", "generic").toLowerCase(Locale.ENGLISH);
+		if ((os.indexOf("mac") >= 0) || (os.indexOf("darwin") >= 0)) return OSType.MacOS;
+		if (os.indexOf("win") >= 0) return OSType.Windows;
+		if ((os.indexOf("nux") >= 0) || (os.indexOf("nix") >= 0) || (os.indexOf("aix") >= 0) || (os.indexOf("sunos") >= 0) || (os.indexOf("solaris") >= 0)) return OSType.NIX;
+		return OSType.Other;
+	}
+	
+
+}

src/com/gpl/rpg/atcontentstudio/utils/FileUtils.java

@@ -6,9 +6,15 @@ import java.io.File;
 import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
+import java.io.FileWriter;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.nio.file.CopyOption;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardCopyOption;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipOutputStream;
 
@@ -108,7 +114,85 @@ public class FileUtils {
 				}
 			}
 		}
-		
+	}
+	
+	public static boolean makeSymlink(File targetFile, File linkFile) {
+		Path target = Paths.get(targetFile.getAbsolutePath());
+		Path link = Paths.get(linkFile.getAbsolutePath());
+		if (!Files.exists(link)) {
+			try {
+				Files.createSymbolicLink(link, target);
+			} catch (Exception e) {
+				System.err.println("Failed to create symbolic link to target \""+targetFile.getAbsolutePath()+"\" as \""+linkFile.getAbsolutePath()+"\" the java.nio way:");
+				e.printStackTrace();
+				switch (DesktopIntegration.detectedOS) {
+				case Windows:
+					System.err.println("Trying the Windows way with mklink");
+					try {
+						Runtime.getRuntime().exec("cmd.exe /C mklink "+(targetFile.isDirectory() ? "/J " : "")+linkFile.getAbsolutePath()+" "+targetFile.getAbsolutePath());
+					} catch (IOException e1) {
+						e1.printStackTrace();
+					}
+					System.err.println("Attempting UAC elevation through VBS script.");
+					if (!linkFile.exists()) {
+						runWithUac("cmd.exe /C mklink "+(targetFile.isDirectory() ? "/J " : "")+linkFile.getAbsolutePath()+" "+targetFile.getAbsolutePath(), 3, linkFile);
+					}
+					break;
+				case MacOS:
+				case NIX:
+				case Other:
+					System.err.println("Trying the unix way with ln -s");
+					try {
+						Runtime.getRuntime().exec("ln -s "+targetFile.getAbsolutePath()+" "+linkFile.getAbsolutePath());
+					} catch (IOException e1) {
+						e1.printStackTrace();
+					}
+					break;
+				default:
+					System.out.println("Unrecognized OS. Please contact ATCS dev.");
+					break;
+					
+				}
+			}
+		}
+		if (!Files.exists(link)) {
+			System.err.println("Failed to create link \""+linkFile.getAbsolutePath()+"\" targetting \""+targetFile.getAbsolutePath()+"\"");
+			System.err.println("You can try running ATCS with administrative privileges once, or create the symbolic link manually.");
+		}
+		return true;
+	}
+
+	public static File backupFile(File f) {
+		try {
+			Path returned = Files.copy(Paths.get(f.getAbsolutePath()), Paths.get(f.getAbsolutePath()+".bak"), StandardCopyOption.REPLACE_EXISTING);
+			return returned.toFile();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		return null;
+	}
+	
+	static final String uacBatName = "ATCS_elevateWithUac.bat";
+	public static void runWithUac(String command, int tries, File checkExists) {
+		File tmpFolder = new File(System.getProperty("java.io.tmpdir"));
+		File batFile = new File(tmpFolder, uacBatName);
+		batFile.deleteOnExit();
+		FileWriter writer;
+		try {
+			writer = new FileWriter(batFile, false);
+			writer.write(
+				"@echo Set objShell = CreateObject(\"Shell.Application\") > %temp%\\sudo.tmp.vbs\r\n"
+				+ "@echo args = Right(\"%*\", (Len(\"%*\") - Len(\"%1\"))) >> %temp%\\sudo.tmp.vbs\r\n"
+				+ "@echo objShell.ShellExecute \"%1\", args, \"\", \"runas\" >> %temp%\\sudo.tmp.vbs\r\n"
+				+ "@cscript %temp%\\sudo.tmp.vbs\r\n"
+				+ "del /f %temp%\\sudo.tmp.vbs\r\n");
+			writer.close();
+			while (!checkExists.exists() && tries-- > 0) {
+				Runtime.getRuntime().exec(new String[]{"cmd.exe","/C", batFile.getAbsolutePath()+" "+command});
+			}
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 		
 	}