ATCS/src/com/gpl/rpg/atcontentstudio/ui/CollapsiblePanel.java

package com.gpl.rpg.atcontentstudio.ui;

import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.BorderFactory;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
  
public class CollapsiblePanel extends JPanel {  
  
	private static final long serialVersionUID = 319384990345722150L;
	
	String title;  
    TitledBorder border;  
  
    public CollapsiblePanel(String title) {
    	super();
    	this.title = title;
        border = BorderFactory.createTitledBorder(title);  
        setBorder(border);  
        BorderLayout borderLayout = new BorderLayout();  
        setLayout(borderLayout);  
        addMouseListener(mouseListener);  
    }  
  
    MouseListener mouseListener = new MouseAdapter() {  
        @Override  
        public void mouseClicked(MouseEvent e) {  
            toggleVisibility();  
        }  
    };  
  
    ComponentListener contentComponentListener = new ComponentAdapter() {  
        @Override  
        public void componentShown(ComponentEvent e) {  
            updateBorderTitle();  
        }  
        @Override  
        public void componentHidden(ComponentEvent e) {  
            updateBorderTitle();  
        }  
    };  
  
    public String getTitle() {  
        return title;  
    }  
  
    public void setTitle(String title) {
    	String oldTitle = this.title;
    	this.title = title;
        firePropertyChange("title", oldTitle, this.title);
        updateBorderTitle();
    }  
  
    @Override  
    public Component add(Component comp) {  
        comp.addComponentListener(contentComponentListener);  
        Component r = super.add(comp);  
        updateBorderTitle();  
        return r;  
    }  
  
    @Override  
    public Component add(String name, Component comp) {  
        comp.addComponentListener(contentComponentListener);  
        Component r = super.add(name, comp);  
        updateBorderTitle();  
        return r;  
    }  
  
    @Override  
    public Component add(Component comp, int index) {  
        comp.addComponentListener(contentComponentListener);  
        Component r = super.add(comp, index);  
        updateBorderTitle();  
        return r;  
    }  
  
    @Override  
    public void add(Component comp, Object constraints) {  
        comp.addComponentListener(contentComponentListener);  
        super.add(comp, constraints);  
        updateBorderTitle();  
    }  
  
    @Override  
    public void add(Component comp, Object constraints, int index) {  
        comp.addComponentListener(contentComponentListener);  
        super.add(comp, constraints, index);  
        updateBorderTitle();  
    }  
  
    @Override  
    public void remove(int index) {  
        Component comp = getComponent(index);  
        comp.removeComponentListener(contentComponentListener);  
        super.remove(index);  
    }  
  
    @Override  
    public void remove(Component comp) {  
        comp.removeComponentListener(contentComponentListener);  
        super.remove(comp);  
    }  
  
    @Override  
    public void removeAll() {  
        for (Component c : getComponents()) {  
            c.removeComponentListener(contentComponentListener);  
        }  
        super.removeAll();  
    }  
  
    protected void toggleVisibility() {  
        toggleVisibility(hasInvisibleComponent());  
    }  
  
    protected void toggleVisibility(boolean visible) {  
        for (Component c : getComponents()) {  
            c.setVisible(visible);  
        }  
        updateBorderTitle();  
    }  
  
    protected void updateBorderTitle() {  
        String arrow = "";  
        if (getComponentCount() > 0) {  
            arrow = (hasInvisibleComponent()?"[+] ":"[-] ");  
        }  
        border.setTitle(arrow+title);  
        repaint();  
    }  
  
    protected final boolean hasInvisibleComponent() {  
        for (Component c : getComponents()) {  
            if (!c.isVisible()) {  
                return true;  
            }  
        }  
        return false;  
    }  
    
    public void collapse() {
    	toggleVisibility(false);
    }
    public void expand() {
    	toggleVisibility(true);
    }
    public void setExpanded(boolean expand) {
    	toggleVisibility(expand);
    }
  
}