motifdesktopiconui.java

来自「JAVA 所有包」· Java 代码 · 共 349 行

/*
 * @(#)MotifDesktopIconUI.java	1.29 05/11/30
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package com.sun.java.swing.plaf.motif;

import sun.swing.SwingUtilities2;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import java.beans.*;
import java.util.EventListener;
import java.io.Serializable;


/**
 * Motif rendition of the component.
 *
 * @version 1.29 11/30/05
 * @author Thomas Ball
 * @author Rich Schiavi
 */
public class MotifDesktopIconUI extends BasicDesktopIconUI
{
    protected DesktopIconActionListener desktopIconActionListener;
    protected DesktopIconMouseListener  desktopIconMouseListener;

    protected Icon       defaultIcon;
    protected IconButton iconButton;
    protected IconLabel  iconLabel;

    // This is only used for its system menu, but we need a reference to it so
    // we can remove its listeners.
    private MotifInternalFrameTitlePane sysMenuTitlePane;

    JPopupMenu systemMenu;
    EventListener mml;

    final static int LABEL_HEIGHT = 18;
    final static int LABEL_DIVIDER = 4;    // padding between icon and label

    final static Font defaultTitleFont =
	new Font(Font.SANS_SERIF, Font.PLAIN, 12);

    public static ComponentUI createUI(JComponent c)    {
        return new MotifDesktopIconUI();
    }

    public MotifDesktopIconUI() {
    }

    protected void installDefaults(){
	super.installDefaults();
	setDefaultIcon(UIManager.getIcon("DesktopIcon.icon"));
	iconButton = createIconButton(defaultIcon);
        // An underhanded way of creating a system popup menu.
        sysMenuTitlePane =  new MotifInternalFrameTitlePane(frame);
        systemMenu = sysMenuTitlePane.getSystemMenu();

        MotifBorders.FrameBorder border = new MotifBorders.FrameBorder(desktopIcon);
	desktopIcon.setLayout(new BorderLayout());
        iconButton.setBorder(border);
	desktopIcon.add(iconButton, BorderLayout.CENTER);
        iconLabel = createIconLabel(frame);
        iconLabel.setBorder(border);
        desktopIcon.add(iconLabel, BorderLayout.SOUTH);
        desktopIcon.setSize(desktopIcon.getPreferredSize());
        desktopIcon.validate();
	JLayeredPane.putLayer(desktopIcon, JLayeredPane.getLayer(frame));
    }

    protected void installComponents(){
    }

    protected void uninstallComponents(){
    }
    
    protected void installListeners(){
	super.installListeners();
	desktopIconActionListener = createDesktopIconActionListener();
	desktopIconMouseListener = createDesktopIconMouseListener();
	iconButton.addActionListener(desktopIconActionListener);
	iconButton.addMouseListener(desktopIconMouseListener);
        iconLabel.addMouseListener(desktopIconMouseListener);
    }

    JInternalFrame.JDesktopIcon getDesktopIcon(){
      return desktopIcon;
    }

    void setDesktopIcon(JInternalFrame.JDesktopIcon d){
      desktopIcon = d;
    }

    JInternalFrame getFrame(){
      return frame;
    }
  
    void setFrame(JInternalFrame f){
      frame = f ;
    }

    protected void showSystemMenu(){
      systemMenu.show(iconButton, 0, getDesktopIcon().getHeight());
    }
    
    protected void hideSystemMenu(){
      systemMenu.setVisible(false);
    }

    protected IconLabel createIconLabel(JInternalFrame frame){
	return new IconLabel(frame);
    }
    
    protected IconButton createIconButton(Icon i){
	return new IconButton(i);
    }
    
    protected DesktopIconActionListener createDesktopIconActionListener(){
	return new DesktopIconActionListener();
    }

    protected DesktopIconMouseListener createDesktopIconMouseListener(){
	return new DesktopIconMouseListener();
    }
    
    protected void uninstallDefaults(){
	super.uninstallDefaults();
	desktopIcon.setLayout(null);
	desktopIcon.remove(iconButton);
	desktopIcon.remove(iconLabel);
    }
	
    protected void uninstallListeners(){
        super.uninstallListeners();
        iconButton.removeActionListener(desktopIconActionListener);
        iconButton.removeMouseListener(desktopIconMouseListener);
        sysMenuTitlePane.uninstallListeners();
    }

    public Dimension getMinimumSize(JComponent c) {
        JInternalFrame iframe = desktopIcon.getInternalFrame();
	
        int w = defaultIcon.getIconWidth();
        int h = defaultIcon.getIconHeight() + LABEL_HEIGHT + LABEL_DIVIDER;

	Border border = iframe.getBorder();
	if(border != null) {
	    w += border.getBorderInsets(iframe).left + 
                border.getBorderInsets(iframe).right;
	    h += border.getBorderInsets(iframe).bottom + 
                border.getBorderInsets(iframe).top;
        }

	return new Dimension(w, h);
    }

    public Dimension getPreferredSize(JComponent c) {
        return getMinimumSize(c);
    }

    public Dimension getMaximumSize(JComponent c){
        return getMinimumSize(c);
    }

    /**
      * Returns the default desktop icon.
      */
    public Icon getDefaultIcon() {
	return defaultIcon;
    }

    /**
      * Sets the icon used as the default desktop icon.
      */
    public void setDefaultIcon(Icon newIcon) {
	defaultIcon = newIcon;
    }

    protected class IconLabel extends JPanel {
	JInternalFrame frame;

        IconLabel(JInternalFrame f) {
            super();
	    this.frame = f;
            setFont(defaultTitleFont);

            // Forward mouse events to titlebar for moves.
            addMouseMotionListener(new MouseMotionListener() {
                public void mouseDragged(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseMoved(MouseEvent e) {
                    forwardEventToParent(e);
                }
            });
            addMouseListener(new MouseListener() {
                public void mouseClicked(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mousePressed(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseReleased(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseEntered(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseExited(MouseEvent e) {
                    forwardEventToParent(e);
                }
            });
        }

        void forwardEventToParent(MouseEvent e) {
            getParent().dispatchEvent(new MouseEvent(
                getParent(), e.getID(), e.getWhen(), e.getModifiers(),
                e.getX(), e.getY(), e.getXOnScreen(),
                e.getYOnScreen(), e.getClickCount(),
                e.isPopupTrigger(), MouseEvent.NOBUTTON));
        }

        public boolean isFocusTraversable() { 
            return false; 
        }

        public Dimension getMinimumSize() {
            return new Dimension(defaultIcon.getIconWidth() + 1,
                                 LABEL_HEIGHT + LABEL_DIVIDER);
        }

        public Dimension getPreferredSize() {
            String title = frame.getTitle();
            FontMetrics fm = frame.getFontMetrics(defaultTitleFont);
            int w = 4;
            if (title != null) {
                w += SwingUtilities2.stringWidth(frame, fm, title);
            }
            return new Dimension(w, LABEL_HEIGHT + LABEL_DIVIDER);
        }

        public void paint(Graphics g) {
            super.paint(g);

            // touch-up frame
            int maxX = getWidth() - 1;
            Color shadow = 
                UIManager.getColor("inactiveCaptionBorder").darker().darker();
            g.setColor(shadow);
            g.setClip(0, 0, getWidth(), getHeight());
            g.drawLine(maxX - 1, 1, maxX - 1, 1);
            g.drawLine(maxX, 0, maxX, 0);

            // fill background
            g.setColor(UIManager.getColor("inactiveCaption"));
            g.fillRect(2, 1, maxX - 3, LABEL_HEIGHT + 1);

            // draw text -- clipping to truncate text like CDE/Motif
            g.setClip(2, 1, maxX - 4, LABEL_HEIGHT);
            int y = LABEL_HEIGHT - SwingUtilities2.getFontMetrics(frame, g).
                                                   getDescent();
            g.setColor(UIManager.getColor("inactiveCaptionText"));
            String title = frame.getTitle();
            if (title != null) {
                SwingUtilities2.drawString(frame, g, title, 4, y);
            }
        }
    }

    protected class IconButton extends JButton {
        Icon icon;

        IconButton(Icon icon) {
            super(icon);
            this.icon = icon;
            // Forward mouse events to titlebar for moves.
            addMouseMotionListener(new MouseMotionListener() {
                public void mouseDragged(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseMoved(MouseEvent e) {
                    forwardEventToParent(e);
                }
            });
            addMouseListener(new MouseListener() {
                public void mouseClicked(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mousePressed(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseReleased(MouseEvent e) {
                    if (!systemMenu.isShowing()) {
                        forwardEventToParent(e);
                    }
                }
                public void mouseEntered(MouseEvent e) {
                    forwardEventToParent(e);
                }
                public void mouseExited(MouseEvent e) {
                    forwardEventToParent(e);
                }
            });
        }

        void forwardEventToParent(MouseEvent e) {
            getParent().dispatchEvent(new MouseEvent(
                getParent(), e.getID(), e.getWhen(), e.getModifiers(),
                e.getX(), e.getY(), e.getXOnScreen(), e.getYOnScreen(),
                e.getClickCount(), e.isPopupTrigger(), MouseEvent.NOBUTTON ));
        }

        public boolean isFocusTraversable() { 
            return false; 
        }
    }


    protected class DesktopIconActionListener implements ActionListener {
        public void actionPerformed(ActionEvent e){
	    systemMenu.show(iconButton, 0, getDesktopIcon().getHeight());
	}
    }

    protected class DesktopIconMouseListener extends MouseAdapter {
	// if we drag or move we should deengage the popup
        public void mousePressed(MouseEvent e){
	    if (e.getClickCount() > 1) {
		try {
		    getFrame().setIcon(false);
		} catch (PropertyVetoException e2){ }
		systemMenu.setVisible(false);
		/* the mouse release will not get reported correctly,
		   because the icon will no longer be in the hierarchy;
		   maybe that should be fixed, but until it is, we need
		   to do the required cleanup here. */
	        getFrame().getDesktopPane().getDesktopManager().endDraggingFrame((JComponent)e.getSource());
	    }
	}
    }
}