improve some checks when switching look and feel

this should improve compatibility with newer jdk versions

.gitattributes

@@ -0,0 +1,6 @@
+# Set default behavior to automatically normalize line endings.
+* text=auto
+
+# Force bash scripts to always use LF line endings so that if a repo is accessed
+# in Unix via a file share from Windows, the scripts will work.
+*.sh text eol=lf

.github/workflows/release.yml

@@ -11,51 +11,46 @@ jobs:
     steps:
     - uses: actions/checkout@v2
 
-    - name: Set up JDK
-      uses: actions/setup-java@v2
-      with:
-        java-version: '11'
-        distribution: 'adopt'
-
-    - name: Install NSIS
-      uses: joncloud/makensis-action@v4
-
-    - name: Build JAR
-      shell: bash
-      run: |
-        cd ATCS/packaging
-        chmod +x package.sh
-        ./package.sh -windows
-
-    - name: Create Installer
-      shell: bash
-      run: |
-        cd ATCS/packaging/Windows
-        makensis ATCS_Installer.nsi
-
     - name: Get Version
       id: get_version
       shell: bash
       run: |
-        VERSION=$(cat ATCS/packaging/ATCS_latest | sed 's/^v//')
+        echo "Reading version from file:"
+        cat res/ATCS_latest
+        echo ""
+        VERSION=$(tr -d '[:space:]' < "res/ATCS_latest")
+        echo "Processed version: $VERSION"
         echo "VERSION=$VERSION" >> $GITHUB_ENV
+        echo "Environment variable set to: $VERSION"
 
-    - name: Upload ZIP to Release
-      uses: actions/upload-release-asset@v1
+    - name: Set up JDK
+      uses: actions/setup-java@v2
+      with:
+        java-version: '11'
+        distribution: 'temurin'
+
+    - name: Build JAR
+      shell: bash
+      run: |
+        cd packaging
+        chmod +x package.sh
+        echo "Building JAR and ZIP for version: ${{ env.VERSION }}"
+        ./package.sh -windows
+        echo "Created artifacts:"
+        ls -la common/ATCS.jar
+        ls -la ATCS_${{ env.VERSION }}.zip
+
+    - name: Install NSIS
+      uses: joncloud/makensis-action@v4
+      with:
+        script-file: packaging/Windows/ATCS_Installer.nsi
+        arguments: /DVERSION="${{ env.VERSION }}"
+
+    - name: Upload Release Assets
+      uses: softprops/action-gh-release@v1
       env:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
-        upload_url: ${{ github.event.release.upload_url }}
-        asset_path: ./ATCS/packaging/ATCS_${{ env.VERSION }}.zip
-        asset_name: ATCS_${{ env.VERSION }}.zip
-        asset_content_type: application/zip
-
-    - name: Upload Installer to Release
-      uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ github.event.release.upload_url }}
-        asset_path: ./ATCS/packaging/Windows/ATCS_v${{ env.VERSION }}_Setup.exe
-        asset_name: ATCS_v${{ env.VERSION }}_Setup.exe
-        asset_content_type: application/octet-stream
+        files: |
+          ./packaging/ATCS_${{ env.VERSION }}.zip
+          ./packaging/ATCS_${{ env.VERSION }}_Setup.exe

.idea/misc.xml

@@ -1,4 +1,4 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
-  <component name="ProjectRootManager" version="2" default="true" />
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK" />
 </project>

hacked-libtiled/tiled/core/TileSet.java

@@ -98,7 +98,11 @@ public class TileSet implements Iterable<Tile>
         
         File f = new File(imgFilename);
 
-        BufferedImage image = ImageIO.read(f.getCanonicalFile());
+        BufferedImage image;
+        try {
+            image = ImageIO.read(f.getCanonicalFile());
+        } catch (IOException e) { throw new IOException("Failed to load " + imgFilename);
+        }
         if (image == null) {
             throw new IOException("Failed to load " + imgFilename);
         }

packaging/Linux/.gitignore

@@ -1,2 +0,0 @@
-/ATCS_v*.zip
-/ATCS_v*.zip.rename

packaging/Linux/ATCS/ATCS.cmd

@@ -1,20 +0,0 @@
-@echo off
-
-set "ATCS_DIR=%~dp0"
-set "MAX_MEM=512M"
-set "CP=%ATCS_DIR%lib\*"
-set "JAVA=javaw.exe"
-set "JAVA_OPTS=-DFONT_SCALE=1.0 -Dswing.aatext=true"
-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

@@ -1,22 +0,0 @@
-#!/bin/bash
-ATCS_DIR=$(dirname $(readlink -f "$0" || greadlink -f "$0" || stat -f "$0"))
-MAX_MEM=512M
-CP=$(find ${ATCS_DIR}/lib/ -name '*.jar' | paste -sd: -)
-JAVA=java
-JAVA_OPTS='-DFONT_SCALE=1.0 -Dswing.aatext=true'
-ENV_FILE=${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/Linux/ATCS/lib/.gitignore

@@ -1 +0,0 @@
-/*.jar

packaging/Windows/ATCS_Installer.nsi

@@ -1,13 +1,12 @@
 !include MUI2.nsh
 
-!system 'for /f "delims=" %%a in ('type ..\ATCS_latest') do set "VERSION=%%a" && exit'
-!define VERSION "$%VERSION:~1%"
+; Version will be passed as /DVERSION=vx.x.x
 !define TRAINER_VERSION "0.1.5"
 !define JAVA_BIN "java"
 !define ATCS_SOURCE_DIR "..\..\"
 
-Name "Andor's Trail Content Studio v${VERSION}"
-OutFile "ATCS_v${VERSION}_Setup.exe"
+Name "Andor's Trail Content Studio ${VERSION}"
+OutFile "..\ATCS_${VERSION}_Setup.exe"
 InstallDir "$PROGRAMFILES\ATCS\"
 
 ;SetCompressor /SOLID /FINAL lzma
@@ -15,10 +14,10 @@ InstallDir "$PROGRAMFILES\ATCS\"
 Var StartMenuFolder
 
 !define MUI_WELCOMEPAGE_TITLE "Welcome to Andor's Trail Content Studio installer"
-!define MUI_WELCOMEPAGE_TEXT "This will install Andor's Trail Content Studio v${VERSION}"
-!define MUI_FINISHPAGE_TEXT "Andor's Trail Content Studio v${VERSION} - Install completed !"
+!define MUI_WELCOMEPAGE_TEXT "This will install Andor's Trail Content Studio ${VERSION}"
+!define MUI_FINISHPAGE_TEXT "Andor's Trail Content Studio ${VERSION} - Install completed !"
 !define MUI_STARTMENUPAGE_DEFAULTFOLDER "Andor's Trail Content Studio"
-!define MUI_PAGE_HEADER_TEXT "Installing Andor's Trail Content Studio v${VERSION}"
+!define MUI_PAGE_HEADER_TEXT "Installing Andor's Trail Content Studio ${VERSION}"
 
 
 ;Start Menu Folder Page Configuration

packaging/common/ATCS.sh

@@ -1,21 +1,26 @@
 #!/bin/bash
-ATCS_DIR=$(dirname $(readlink -f "$0" || greadlink -f "$0" || stat -f "$0"))
+ATCS_DIR="$(dirname "$(readlink -f "$0" || greadlink -f "$0" || stat -f "$0")")"
+echo "ATCS_DIR: '${ATCS_DIR}'"
 
-MAX_MEM=512M
-
-JAVA=java
+MAX_MEM="512M"
+JAVA="java"
 JAVA_OPTS='-DFONT_SCALE=1.0 -Dswing.aatext=true'
-ENV_FILE=${ATCS_DIR}/ATCS.env
 
-if [ -f ${ENV_FILE} ]; then
-	source ${ENV_FILE}
+ENV_FILE="${ATCS_DIR}/ATCS.env"
+
+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 "" >>${ENV_FILE}
+  {
+    echo "#MAX_MEM=\"${MAX_MEM}\""
+    echo "#JAVA=\"${JAVA}\""
+    echo "#JAVA_OPTS=\"${JAVA_OPTS}\""
+    echo ""
+  }>"${ENV_FILE}"
 fi
 
 export ENV_FILE
 
-$JAVA ${JAVA_OPTS} -Xmx${MAX_MEM} -jar ${ATCS_DIR}/ATCS.jar
+# shellcheck disable=SC2086
+# (spellchecker is disabled for this line, because we want it to be split into multiple arguments)
+$JAVA ${JAVA_OPTS} -Xmx${MAX_MEM} -jar "${ATCS_DIR}/ATCS.jar"

packaging/package.sh

@@ -18,7 +18,7 @@ ATCS_SOURCE_DIR=$(dirname "${PACKAGING_DIR}")
 TEMP_DIR="${PACKAGING_DIR}/tmp"
 JAR_LOCATION="${PACKAGING_DIR}/ATCS.jar" # Output JAR location as per script
 MANIFEST_LOCATION="${PACKAGING_DIR}/Manifest.txt"
-VERSION_FILE="${PACKAGING_DIR}/ATCS_latest"
+VERSION_FILE="${ATCS_SOURCE_DIR}/res/ATCS_latest"
 SOURCE_BASE_DIR="${ATCS_SOURCE_DIR}/src" # Base directory for standard source code
 LIB_BASE_DIR="${ATCS_SOURCE_DIR}/lib"     # Base directory for libraries
 
@@ -29,7 +29,7 @@ EXTRA_SOURCE_DIRS=(
   "siphash-zackehh/src/main/java"
 )
 
-# --- Libraries to include (from IntelliJ artifact definition) ---
+# --- Libraries to include ---
 LIBRARIES=(
   "AndorsTrainer_v0.1.5.jar"
   "bsh-2.0b4.jar"
@@ -44,7 +44,7 @@ LIBRARIES=(
 
 # --- Get version ---
 echo "Getting version"
-VERSION=$(cat "${VERSION_FILE}")
+VERSION=$(tr -d '[:space:]' < "${VERSION_FILE}")
 echo "Got version ${VERSION}"
 
 # --- Prepare temporary directory ---
@@ -62,7 +62,7 @@ done
 
 # --- Set ClassPath ---
 echo "Getting source files"
-# Find all java files in source directories and compile them
+# Find all java files in source directories
 SOURCE_FILES=$(find "${SOURCE_BASE_DIR}" "${EXTRA_SOURCE_DIRS[@]/#/${ATCS_SOURCE_DIR}/}" -name "*.java" -print)
 #echo "SourceFiles: ${SOURCE_FILES}"
 echo ""
@@ -70,6 +70,8 @@ echo ""
 # --- Build Java classes ---
 echo 'Building java classes'
 
+# shellcheck disable=SC2086
+# (we need word splitting here to pass multiple files)
 javac -cp "${TEMP_DIR}" -d "${TEMP_DIR}" ${SOURCE_FILES}
 if [ $? -ne 0 ]; then
     echo "Compilation failed. Please check errors above."
@@ -84,6 +86,7 @@ mkdir -p "${TEMP_DIR}/com/gpl/rpg/atcontentstudio/img"
 mkdir -p "${TEMP_DIR}/tiled/io/resources/"
 cp -r "${ATCS_SOURCE_DIR}"/src/com/gpl/rpg/atcontentstudio/img/* "${TEMP_DIR}/com/gpl/rpg/atcontentstudio/img/" # some icons
 cp -r "${ATCS_SOURCE_DIR}"/hacked-libtiled/tiled/io/resources/* "${TEMP_DIR}/tiled/io/resources/" # dtd file for tmx maps
+cp "${VERSION_FILE}" "${TEMP_DIR}/" # Copy version file
 
 # --- Create JAR file ---
 echo ""
@@ -114,7 +117,10 @@ else
     # Use zip command on Linux
     zip -r "ATCS_${VERSION}.zip" common/* # archive the 'common' folder which now contains the JAR and libs
 fi
+if [ $? -ne 0 ]; then
+    echo "Archive creation failed."
+    exit 1
+fi
 echo "Created archive at ${PACKAGING_DIR}/ATCS_${VERSION}.zip"
-cd "${PACKAGING_DIR}" || exit
 
 echo "Script finished."

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

@@ -14,11 +14,7 @@ import java.io.InputStreamReader;
 import java.net.MalformedURLException;
 import java.net.URISyntaxException;
 import java.net.URL;
-import java.util.Enumeration;
-import java.util.HashMap;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
@@ -41,194 +37,219 @@ 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 = "v0.6.21";
+    public static final String APP_NAME = "Andor's Trail Content Studio";
+    public static final String APP_VERSION = readVersionFromFile();
+    public static final String CHECK_UPDATE_URL = "https://andorstrail.com/static/ATCS_latest";
+    public static final String DOWNLOAD_URL = "https://andorstrail.com/viewtopic.php?f=6&t=4806";
 
-	public static final String CHECK_UPDATE_URL = "https://andorstrail.com/static/ATCS_latest";
-	public static final String DOWNLOAD_URL = "https://andorstrail.com/viewtopic.php?f=6&t=4806";
+    public static final String FONT_SCALE_ENV_VAR_NAME = "FONT_SCALE";
 
-	public static final String FONT_SCALE_ENV_VAR_NAME = "FONT_SCALE";
+    public static boolean STARTED = false;
+    public static float SCALING = 1.0f;
+    public static StudioFrame frame = null;
 
-	public static boolean STARTED = false;
-	public static float SCALING = 1.0f;
-	public static StudioFrame frame = null;
+    // Need to keep a strong reference to it, to avoid garbage collection that'll
+    // reset these loggers.
+    public static final List<Logger> configuredLoggers = new LinkedList<Logger>();
 
-	// Need to keep a strong reference to it, to avoid garbage collection that'll
-	// reset these loggers.
-	public static final List<Logger> configuredLoggers = new LinkedList<Logger>();
+    /**
+     * @param args
+     */
+    public static void main(String[] args) {
+        String fontScaling = System.getProperty(FONT_SCALE_ENV_VAR_NAME);
+        Float fontScale = null;
+        if (fontScaling != null) {
+            try {
+                fontScale = Float.parseFloat(fontScaling);
+                SCALING = fontScale;
+            } catch (NumberFormatException e) {
+                System.err.println("Failed to parse font scaling parameter. Using default.");
+                e.printStackTrace();
+            }
+        }
 
-	/**
-	 * @param args
-	 */
-	public static void main(String[] args) {
-		String fontScaling = System.getProperty(FONT_SCALE_ENV_VAR_NAME);
-		Float fontScale = null;
-		if (fontScaling != null) {
-			try {
-				fontScale = Float.parseFloat(fontScaling);
-				SCALING = fontScale;
-			} catch (NumberFormatException e) {
-				System.err.println("Failed to parse font scaling parameter. Using default.");
-				e.printStackTrace();
-			}
-		}
+        ConfigCache.init();
 
-		ConfigCache.init();
+        String laf = ConfigCache.getFavoriteLaFClassName();
+        setLookAndFeel(laf);
 
-		try {
-			String laf = ConfigCache.getFavoriteLaFClassName();
-			if (laf == null)
-				laf = UIManager.getSystemLookAndFeelClassName();
-			UIManager.setLookAndFeel(laf);
-		} catch (ClassNotFoundException e) {
-			e.printStackTrace();
-		} catch (InstantiationException e) {
-			e.printStackTrace();
-		} catch (IllegalAccessException e) {
-			e.printStackTrace();
-		} catch (UnsupportedLookAndFeelException e) {
-			e.printStackTrace();
-		}
+        // Need to keep a strong reference to it, to avoid garbage collection that'll
+        // reset this setting.
+        Logger l = Logger.getLogger(ExpressionParser.class.getName());
+        l.setLevel(Level.OFF);
+        configuredLoggers.add(l);
 
-		scaleUIFont();
+        final WorkspaceSelector wsSelect = new WorkspaceSelector();
+        wsSelect.pack();
+        Dimension sdim = Toolkit.getDefaultToolkit().getScreenSize();
+        Dimension wdim = wsSelect.getSize();
+        wsSelect.setLocation((sdim.width - wdim.width) / 2, (sdim.height - wdim.height) / 2);
+        wsSelect.setVisible(true);
 
-		// Need to keep a strong reference to it, to avoid garbage collection that'll
-		// reset this setting.
-		Logger l = Logger.getLogger(ExpressionParser.class.getName());
-		l.setLevel(Level.OFF);
-		configuredLoggers.add(l);
+        wsSelect.addWindowListener(new WindowAdapter() {
+            @Override
+            public synchronized void windowClosed(WindowEvent e) {
+                if (wsSelect.selected != null && !STARTED) {
+                    ATContentStudio.STARTED = true;
+                    final File workspaceRoot = new File(wsSelect.selected);
+                    WorkerDialog.showTaskMessage("Loading your workspace...", null, new Runnable() {
+                        public void run() {
+                            Workspace.setActive(workspaceRoot);
+                            if (Workspace.activeWorkspace.settings.useInternet.getCurrentValue()
+                                    && Workspace.activeWorkspace.settings.checkUpdates.getCurrentValue()) {
+                                new Thread() {
+                                    public void run() {
+                                        checkUpdate();
+                                    }
+                                }.start();
+                            }
+                            frame = new StudioFrame(APP_NAME + " " + APP_VERSION);
+                            frame.setVisible(true);
+                            frame.setDefaultCloseOperation(StudioFrame.DO_NOTHING_ON_CLOSE);
+                        }
 
-		final WorkspaceSelector wsSelect = new WorkspaceSelector();
-		wsSelect.pack();
-		Dimension sdim = Toolkit.getDefaultToolkit().getScreenSize();
-		Dimension wdim = wsSelect.getSize();
-		wsSelect.setLocation((sdim.width - wdim.width) / 2, (sdim.height - wdim.height) / 2);
-		wsSelect.setVisible(true);
+                        ;
+                    });
+                    for (File f : ConfigCache.getKnownWorkspaces()) {
+                        if (workspaceRoot.equals(f)) {
+                            if (!workspaceRoot.equals(ConfigCache.getLatestWorkspace())) {
+                                ConfigCache.setLatestWorkspace(f);
+                            }
+                            return;
+                        }
+                    }
+                    ConfigCache.addWorkspace(workspaceRoot);
+                    ConfigCache.setLatestWorkspace(workspaceRoot);
 
-		wsSelect.addWindowListener(new WindowAdapter() {
-			@Override
-			public synchronized void windowClosed(WindowEvent e) {
-				if (wsSelect.selected != null && !STARTED) {
-					ATContentStudio.STARTED = true;
-					final File workspaceRoot = new File(wsSelect.selected);
-					WorkerDialog.showTaskMessage("Loading your workspace...", null, new Runnable() {
-						public void run() {
-							Workspace.setActive(workspaceRoot);
-							if (Workspace.activeWorkspace.settings.useInternet.getCurrentValue()
-									&& Workspace.activeWorkspace.settings.checkUpdates.getCurrentValue()) {
-								new Thread() {
-									public void run() {
-										checkUpdate();
-									}
-								}.start();
-							}
-							frame = new StudioFrame(APP_NAME + " " + APP_VERSION);
-							frame.setVisible(true);
-							frame.setDefaultCloseOperation(StudioFrame.DO_NOTHING_ON_CLOSE);
-						};
-					});
-					for (File f : ConfigCache.getKnownWorkspaces()) {
-						if (workspaceRoot.equals(f)) {
-							if (!workspaceRoot.equals(ConfigCache.getLatestWorkspace())) {
-								ConfigCache.setLatestWorkspace(f);
-							}
-							return;
-						}
-					}
-					ConfigCache.addWorkspace(workspaceRoot);
-					ConfigCache.setLatestWorkspace(workspaceRoot);
+                }
+            }
+        });
+    }
 
-				}
-			}
-		});
-	}
+    public static void setLookAndFeel(String laf) {
+        if (laf == null)
+        {
+            System.out.println("No look and feel specified, using system default.");
+            laf = UIManager.getSystemLookAndFeelClassName();
+        }
+        System.out.println("Info: Setting look and feel to: " + laf);
 
-	private static void checkUpdate() {
-		BufferedReader in = null;
-		try {
-			URL url = new URL(CHECK_UPDATE_URL);
-			in = new BufferedReader(new InputStreamReader(url.openStream()));
+        try {
+            UIManager.setLookAndFeel(laf);
+        } catch (ClassNotFoundException e) {
+            System.err.println("Failed to load system look and feel. ");
+            System.err.println("Installed look and feel classes: ");
+            for (UIManager.LookAndFeelInfo info : UIManager.getInstalledLookAndFeels()) {
+                System.err.println("  " + info.getName() + " (" + info.getClassName() + ")");
+            }
+            System.err.println("Tried to load: " + laf + " but got this error:");
 
-			String inputLine, lastLine = null;
-			while ((inputLine = in.readLine()) != null) {
-				lastLine = inputLine;
-			}
-			if (lastLine != null && !lastLine.equals(APP_VERSION)) {
+            e.printStackTrace();
+        } catch (InstantiationException | UnsupportedLookAndFeelException | IllegalAccessException e) {
+            e.printStackTrace();
+        }
+        var newLaF = UIManager.getLookAndFeel();
+        System.out.println("Using look and feel: " + newLaF.getName() + " (" + newLaF.getClass().getName() + ")");
 
-				// for copying style
-				JLabel label = new JLabel();
-				Font font = label.getFont();
-				Color color = label.getBackground();
+        scaleUIFont();
+    }
 
-				// create some css from the label's font
-				StringBuffer style = new StringBuffer("font-family:" + font.getFamily() + ";");
-				style.append("font-weight:" + (font.isBold() ? "bold" : "normal") + ";");
-				style.append("font-size:" + font.getSize() + "pt;");
-				style.append("background-color: rgb(" + color.getRed() + "," + color.getGreen() + "," + color.getBlue()
-						+ ");");
+    private static void checkUpdate() {
+        BufferedReader in = null;
+        try {
+            URL url = new URL(CHECK_UPDATE_URL);
+            in = new BufferedReader(new InputStreamReader(url.openStream()));
 
-				JEditorPane ep = new JEditorPane("text/html",
-						"<html><body style=\"" + style + "\">" + "You are not running the latest ATCS version.<br/>"
-								+ "You can get the latest version (" + lastLine + ") by clicking the link below.<br/>"
-								+ "<a href=\"" + DOWNLOAD_URL + "\">" + DOWNLOAD_URL + "</a><br/>" + "<br/>"
-								+ "</body></html>");
+            String inputLine, lastLine = null;
+            while ((inputLine = in.readLine()) != null) {
+                lastLine = inputLine;
+            }
+            if (lastLine != null && !lastLine.equals(APP_VERSION)) {
 
-				ep.setEditable(false);
-				ep.setBorder(null);
+                // for copying style
+                JLabel label = new JLabel();
+                Font font = label.getFont();
+                Color color = label.getBackground();
 
-				ep.addHyperlinkListener(new HyperlinkListener() {
+                // create some css from the label's font
+                StringBuffer style = new StringBuffer("font-family:" + font.getFamily() + ";");
+                style.append("font-weight:" + (font.isBold() ? "bold" : "normal") + ";");
+                style.append("font-size:" + font.getSize() + "pt;");
+                style.append("background-color: rgb(" + color.getRed() + "," + color.getGreen() + "," + color.getBlue()
+                        + ");");
 
-					@Override
-					public void hyperlinkUpdate(HyperlinkEvent e) {
-						try {
-							if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED)) {
-								Desktop.getDesktop().browse(e.getURL().toURI());
-							}
-						} catch (IOException e1) {
-							e1.printStackTrace();
-						} catch (URISyntaxException e1) {
-							e1.printStackTrace();
-						}
-					}
-				});
+                JEditorPane ep = new JEditorPane("text/html",
+                        "<html><body style=\"" + style + "\">" + "You are not running the latest ATCS version.<br/>"
+                                + "You can get the latest version (" + lastLine + ") by clicking the link below.<br/>"
+                                + "<a href=\"" + DOWNLOAD_URL + "\">" + DOWNLOAD_URL + "</a><br/>" + "<br/>"
+                                + "</body></html>");
 
-				JOptionPane.showMessageDialog(null, ep, "Update available", JOptionPane.INFORMATION_MESSAGE);
-			}
-		} catch (MalformedURLException e) {
-			e.printStackTrace();
-		} catch (IOException e) {
-			e.printStackTrace();
-		} finally {
-			try {
-				if (in != null)
-					in.close();
-			} catch (IOException e) {
-				e.printStackTrace();
-			}
-		}
-	}
+                ep.setEditable(false);
+                ep.setBorder(null);
 
-	public static void scaleUIFont() {
-		if (SCALING != 1.0f) {
-			System.out.println("Scaling fonts to " + SCALING);
-			UIDefaults defaults = UIManager.getLookAndFeelDefaults();
-			Map<Object, Object> newDefaults = new HashMap<Object, Object>();
-			for (Enumeration<Object> e = defaults.keys(); e.hasMoreElements();) {
-				Object key = e.nextElement();
-				Object value = defaults.get(key);
-				if (value instanceof Font) {
-					Font font = (Font) value;
-					int newSize = (int) (font.getSize() * SCALING);
-					if (value instanceof FontUIResource) {
-						newDefaults.put(key, new FontUIResource(font.getName(), font.getStyle(), newSize));
-					} else {
-						newDefaults.put(key, new Font(font.getName(), font.getStyle(), newSize));
-					}
-				}
-			}
-			for (Object key : newDefaults.keySet()) {
-				defaults.put(key, newDefaults.get(key));
-			}
-		}
-	}
+                ep.addHyperlinkListener(new HyperlinkListener() {
+
+                    @Override
+                    public void hyperlinkUpdate(HyperlinkEvent e) {
+                        try {
+                            if (e.getEventType().equals(HyperlinkEvent.EventType.ACTIVATED)) {
+                                Desktop.getDesktop().browse(e.getURL().toURI());
+                            }
+                        } catch (IOException e1) {
+                            e1.printStackTrace();
+                        } catch (URISyntaxException e1) {
+                            e1.printStackTrace();
+                        }
+                    }
+                });
+
+                JOptionPane.showMessageDialog(null, ep, "Update available", JOptionPane.INFORMATION_MESSAGE);
+            }
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                if (in != null)
+                    in.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+    }
+
+    public static void scaleUIFont() {
+        if (SCALING != 1.0f) {
+            System.out.println("Scaling fonts to " + SCALING);
+            UIDefaults defaults = UIManager.getLookAndFeelDefaults();
+            Map<Object, Object> newDefaults = new HashMap<Object, Object>();
+            for (Enumeration<Object> e = defaults.keys(); e.hasMoreElements(); ) {
+                Object key = e.nextElement();
+                Object value = defaults.get(key);
+                if (value instanceof Font) {
+                    Font font = (Font) value;
+                    int newSize = (int) (font.getSize() * SCALING);
+                    if (value instanceof FontUIResource) {
+                        newDefaults.put(key, new FontUIResource(font.getName(), font.getStyle(), newSize));
+                    } else {
+                        newDefaults.put(key, new Font(font.getName(), font.getStyle(), newSize));
+                    }
+                }
+            }
+            for (Object key : newDefaults.keySet()) {
+                defaults.put(key, newDefaults.get(key));
+            }
+        }
+    }
+
+    private static String readVersionFromFile() {
+        try (BufferedReader reader = new BufferedReader(new InputStreamReader(
+                Objects.requireNonNull(ATContentStudio.class.getResourceAsStream("/ATCS_latest"))))) {
+            return reader.readLine();
+        } catch (IOException e) {
+            e.printStackTrace();
+            return "unknown";
+        }
+    }
 }

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

@@ -333,6 +333,10 @@ public class NPC extends JSONElement {
 		}
 		if (this.icon_id != null) {
 			String spritesheetId = this.icon_id.split(":")[0];
+			if (proj.getSpritesheet(spritesheetId) == null) {
+				Notification.addError("Error Spritesheet "+id+". has no backlink.");
+				return;
+			}
 			proj.getSpritesheet(spritesheetId).addBacklink(this);
 		}
 		

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

@@ -162,21 +162,12 @@ public class StudioFrame extends JFrame {
 			changeLaF.add(lafItem);
 			lafItem.addActionListener(new ActionListener() {
 				@Override
-				public void actionPerformed(ActionEvent e) {
-					try {
-						UIManager.setLookAndFeel(i.getClassName());
-						ATContentStudio.scaleUIFont();
-						SwingUtilities.updateComponentTreeUI(ATContentStudio.frame);
-						ConfigCache.setFavoriteLaFClassName(i.getClassName());
-					} catch (ClassNotFoundException e1) {
-						e1.printStackTrace();
-					} catch (InstantiationException e1) {
-						e1.printStackTrace();
-					} catch (IllegalAccessException e1) {
-						e1.printStackTrace();
-					} catch (UnsupportedLookAndFeelException e1) {
-						e1.printStackTrace();
-					}
+				public void actionPerformed(ActionEvent e1) {
+                    String lookAndFeel = i.getClassName();
+                    ATContentStudio.setLookAndFeel(lookAndFeel);
+                    SwingUtilities.updateComponentTreeUI(ATContentStudio.frame);
+                    ConfigCache.setFavoriteLaFClassName(lookAndFeel);
+
 				}
 			});
 		}