metalinternalframetitlepane.java

java jdk 1.4的源码

/*
 * @(#)MetalInternalFrameTitlePane.java	1.51 03/01/23
 *
 * Copyright 2003 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */

package javax.swing.plaf.metal;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.border.*;
import javax.swing.event.InternalFrameEvent;
import java.util.EventListener;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeEvent;
import javax.swing.plaf.basic.BasicInternalFrameTitlePane;


/**
 * Class that manages a JLF title bar
 * @version 1.51 01/23/03
 * @author Steve Wilson
 * @author Brian Beck
 * @since 1.3
 */

public class MetalInternalFrameTitlePane  extends BasicInternalFrameTitlePane {

    protected boolean isPalette = false;  	
    protected Icon paletteCloseIcon;
    protected int paletteTitleHeight;

    private static final Border handyEmptyBorder = new EmptyBorder(0,0,0,0);

    /**
     * Key used to lookup Color from UIManager. If this is null,
     * <code>getWindowTitleBackground</code> is used.
     */
    private String selectedBackgroundKey;
    /**
     * Key used to lookup Color from UIManager. If this is null,
     * <code>getWindowTitleForeground</code> is used.
     */
    private String selectedForegroundKey;
    /**
     * Key used to lookup shadow color from UIManager. If this is null,
     * <code>getPrimaryControlDarkShadow</code> is used.
     */
    private String selectedShadowKey;
    /**
     * Boolean indicating the state of the <code>JInternalFrame</code>s
     * closable property at <code>updateUI</code> time.
     */
    private boolean wasClosable;

    int buttonsWidth = 0;	
    
    MetalBumps activeBumps 
        = new MetalBumps( 0, 0,
                          MetalLookAndFeel.getPrimaryControlHighlight(),
                          MetalLookAndFeel.getPrimaryControlDarkShadow(),
                          MetalLookAndFeel.getPrimaryControl() );
    MetalBumps inactiveBumps 
        = new MetalBumps( 0, 0,
                          MetalLookAndFeel.getControlHighlight(),
                          MetalLookAndFeel.getControlDarkShadow(),
                          MetalLookAndFeel.getControl() );
    MetalBumps paletteBumps;

    private Color activeBumpsHighlight = MetalLookAndFeel.
                             getPrimaryControlHighlight();
    private Color activeBumpsShadow = MetalLookAndFeel.
                             getPrimaryControlDarkShadow();
					    
    public MetalInternalFrameTitlePane(JInternalFrame f) {
        super( f );
    }

    public void addNotify() {
        super.addNotify();
        // This is done here instead of in installDefaults as I was worried
        // that the BasicInternalFrameUI might not be fully initialized, and
        // that if this resets the closable state the BasicInternalFrameUI
        // Listeners that get notified might be in an odd/uninitialized state.
        updateOptionPaneState();
    }

    protected void installDefaults() {
        super.installDefaults();
        setFont( UIManager.getFont("InternalFrame.titleFont") );
        paletteTitleHeight
            = UIManager.getInt("InternalFrame.paletteTitleHeight");
        paletteCloseIcon = UIManager.getIcon("InternalFrame.paletteCloseIcon");
        wasClosable = frame.isClosable();
        selectedForegroundKey = selectedBackgroundKey = null;
    }
    
    protected void uninstallDefaults() {
        super.uninstallDefaults();
        if (wasClosable != frame.isClosable()) {
            frame.setClosable(wasClosable);
        }
    }

    protected void createButtons() {
        super.createButtons();

        Boolean paintActive = frame.isSelected() ? Boolean.TRUE:Boolean.FALSE;
        iconButton.putClientProperty("paintActive", paintActive);
        iconButton.setBorder(handyEmptyBorder);
        iconButton.getAccessibleContext().setAccessibleName(
            UIManager.getString(
                "InternalFrameTitlePane.iconifyButtonAccessibleName"));
    
        maxButton.putClientProperty("paintActive", paintActive);
        maxButton.setBorder(handyEmptyBorder);
        maxButton.getAccessibleContext().setAccessibleName(
            UIManager.getString("InternalFrameTitlePane.maximizeButtonAccessibleName"));
        
        closeButton.putClientProperty("paintActive", paintActive);
        closeButton.setBorder(handyEmptyBorder);
        closeButton.getAccessibleContext().setAccessibleName(
            UIManager.getString("InternalFrameTitlePane.closeButtonAccessibleName"));

        // The palette close icon isn't opaque while the regular close icon is.
        // This makes sure palette close buttons have the right background.
        closeButton.setBackground(MetalLookAndFeel.getPrimaryControlShadow());
    }

    /**
     * Override the parent's method to do nothing. Metal frames do not 
     * have system menus.
     */
    protected void assembleSystemMenu() {}

    /**
     * Override the parent's method to do nothing. Metal frames do not 
     * have system menus.
     */
    protected void addSystemMenuItems(JMenu systemMenu) {}

    /**
     * Override the parent's method to do nothing. Metal frames do not 
     * have system menus.
     */
    protected void showSystemMenu() {}

    /**
     * Override the parent's method avoid creating a menu bar. Metal frames
     * do not have system menus.
     */
    protected void addSubComponents() {
        add(iconButton);
        add(maxButton);
        add(closeButton);
    }

    protected PropertyChangeListener createPropertyChangeListener() {
        return new MetalPropertyChangeHandler();
    }
    
    protected LayoutManager createLayout() {
        return new MetalTitlePaneLayout();
    }

    class MetalPropertyChangeHandler
        extends BasicInternalFrameTitlePane.PropertyChangeHandler
    {
        public void propertyChange(PropertyChangeEvent evt) {
	    String prop = (String)evt.getPropertyName();
            if( prop.equals(JInternalFrame.IS_SELECTED_PROPERTY) ) {
                Boolean b = (Boolean)evt.getNewValue();
                iconButton.putClientProperty("paintActive", b);
                closeButton.putClientProperty("paintActive", b);
                maxButton.putClientProperty("paintActive", b);
            }
            else if ("JInternalFrame.messageType".equals(prop)) {
                updateOptionPaneState();
                frame.repaint();
            }
            super.propertyChange(evt);
        }
    }

    class MetalTitlePaneLayout extends TitlePaneLayout {    
        public void addLayoutComponent(String name, Component c) {}
        public void removeLayoutComponent(Component c) {}   
        public Dimension preferredLayoutSize(Container c)  {
            return minimumLayoutSize(c);
        }

        public Dimension minimumLayoutSize(Container c) {
            // Compute width.
            int width = 30;
            if (frame.isClosable()) {
                width += 21;
            }
            if (frame.isMaximizable()) {
                width += 16 + (frame.isClosable() ? 10 : 4);
            }
            if (frame.isIconifiable()) {
                width += 16 + (frame.isMaximizable() ? 2 :
                    (frame.isClosable() ? 10 : 4));
            }
            FontMetrics fm = getFontMetrics(getFont());
            String frameTitle = frame.getTitle();
            int title_w = frameTitle != null ? fm.stringWidth(frameTitle) : 0;
            int title_length = frameTitle != null ? frameTitle.length() : 0;

            if (title_length > 2) {
                int subtitle_w =
                    fm.stringWidth(frame.getTitle().substring(0, 2) + "...");
                width += (title_w < subtitle_w) ? title_w : subtitle_w;
            }
            else {
                width += title_w;
            }

            // Compute height.
            int height = 0;
            if (isPalette) {
                height = paletteTitleHeight;
            } else {
                int fontHeight = fm.getHeight();
                fontHeight += 7;
                Icon icon = frame.getFrameIcon();
                int iconHeight = 0;
                if (icon != null) {
                    // SystemMenuBar forces the icon to be 16x16 or less.
                    iconHeight = Math.min(icon.getIconHeight(), 16);
                }
                iconHeight += 5;
                height = Math.max(fontHeight, iconHeight);
            }

            return new Dimension(width, height);
        } 
    
        public void layoutContainer(Container c) {
            boolean leftToRight = MetalUtils.isLeftToRight(frame);
       
            int w = getWidth();
            int x = leftToRight ? w : 0;
            int y = 2;
            int spacing;
      
            // assumes all buttons have the same dimensions
            // these dimensions include the borders
            int buttonHeight = closeButton.getIcon().getIconHeight(); 
            int buttonWidth = closeButton.getIcon().getIconWidth();

            if(frame.isClosable()) {
                if (isPalette) {
                    spacing = 3;