synthmenuitemui.java

JAVA的一些源码 JAVA2 STANDARD EDITION DEVELOPMENT KIT 5.0

/*
 * @(#)SynthMenuItemUI.java	1.22 06/12/14
 *
 * Copyright 2004 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package javax.swing.plaf.synth;

import javax.swing.plaf.basic.BasicHTML;
import java.awt.*;
import java.awt.event.*;
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;

import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.plaf.*;
import javax.swing.plaf.basic.*;
import javax.swing.text.View;
import sun.swing.plaf.synth.*;
import com.sun.java.swing.SwingUtilities2;


/**
 * Synth's MenuItemUI.
 *
 * @version 1.22, 12/14/06
 * @author Georges Saab
 * @author David Karlton
 * @author Arnaud Weber
 * @author Fredrik Lagerblad
 */
class SynthMenuItemUI extends BasicMenuItemUI implements
                                   PropertyChangeListener, SynthUI {
    private SynthStyle style;
    private SynthStyle accStyle;

    private String acceleratorDelimiter;

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

    //
    // The next handful of static methods are used by both SynthMenuUI
    // and SynthMenuItemUI. This is necessitated by SynthMenuUI not
    // extending SynthMenuItemUI.
    //
    static Dimension getPreferredMenuItemSize(SynthContext context,
           SynthContext accContext, boolean useCheckAndArrow, JComponent c,
           Icon checkIcon, Icon arrowIcon, int defaultTextIconGap,
           String acceleratorDelimiter) {
        JMenuItem b = (JMenuItem) c;
        Icon icon = (Icon) b.getIcon(); 
        String text = b.getText();
        KeyStroke accelerator =  b.getAccelerator();
        String acceleratorText = "";

        if (accelerator != null) {
            int modifiers = accelerator.getModifiers();
            if (modifiers > 0) {
                acceleratorText = KeyEvent.getKeyModifiersText(modifiers);
                acceleratorText += acceleratorDelimiter;
          }
            int keyCode = accelerator.getKeyCode();
            if (keyCode != 0) {
                acceleratorText += KeyEvent.getKeyText(keyCode);
            } else {
                acceleratorText += accelerator.getKeyChar();
            }
        }

        Font font = context.getStyle().getFont(context);
        FontMetrics fm = b.getFontMetrics(font);
        FontMetrics fmAccel = b.getFontMetrics(accContext.getStyle().
                                               getFont(accContext));

        resetRects();
        
        layoutMenuItem(
                  context, fm, accContext, text, fmAccel, acceleratorText,
                  icon, checkIcon, arrowIcon, b.getVerticalAlignment(),
                  b.getHorizontalAlignment(), b.getVerticalTextPosition(),
                  b.getHorizontalTextPosition(), viewRect, iconRect, textRect,
                  acceleratorRect, checkIconRect, arrowIconRect,
                  text == null ? 0 : defaultTextIconGap, defaultTextIconGap,
                  useCheckAndArrow);
        // find the union of the icon and text rects
        r.setBounds(textRect);
        r = SwingUtilities.computeUnion(iconRect.x,
                                        iconRect.y,
                                        iconRect.width,
                                        iconRect.height,
                                        r);

	// To make the accelerator texts appear in a column,
        // find the widest MenuItem text and the widest accelerator text.

	// Get the parent, which stores the information.
	Container parent = b.getParent();

        if (parent instanceof JPopupMenu) {
            SynthPopupMenuUI popupUI = (SynthPopupMenuUI)SynthLookAndFeel.
                             getUIOfType(((JPopupMenu)parent).getUI(),
                                         SynthPopupMenuUI.class);

            if (popupUI != null) {
                r.width = popupUI.adjustTextWidth(r.width);

                popupUI.adjustAcceleratorWidth(acceleratorRect.width);
	    
                r.width += popupUI.getMaxAcceleratorWidth();
            }
	}
        else if (parent != null && !(b instanceof JMenu &&
                                     ((JMenu)b).isTopLevelMenu())) {
	    r.width += acceleratorRect.width;
        }
	
	if( useCheckAndArrow ) {
	    // Add in the checkIcon
	    r.width += checkIconRect.width;
	    r.width += defaultTextIconGap;

	    // Add in the arrowIcon
	    r.width += defaultTextIconGap;
	    r.width += arrowIconRect.width;
        }	

	r.width += 2*defaultTextIconGap;

        Insets insets = b.getInsets();
        if(insets != null) {
            r.width += insets.left + insets.right;
            r.height += insets.top + insets.bottom;
        }

        // if the width is even, bump it up one. This is critical
        // for the focus dash line to draw properly
        if(r.width%2 == 0) {
            r.width++;
        }

        // if the height is even, bump it up one. This is critical
        // for the text to center properly
        if(r.height%2 == 0) {
            r.height++;
        }
	return r.getSize();
    }

    static void paint(SynthContext context, SynthContext accContext,
                      Graphics g, Icon checkIcon, Icon arrowIcon,
                      boolean useCheckAndArrow, String acceleratorDelimiter,
                      int defaultTextIconGap) {
        JComponent c = context.getComponent();
        JMenuItem b = (JMenuItem)c;
        ButtonModel model = b.getModel();
        Insets i = b.getInsets();

        resetRects();

        viewRect.setBounds(0, 0, b.getWidth(), b.getHeight());

        viewRect.x += i.left;
        viewRect.y += i.top;
        viewRect.width -= (i.right + viewRect.x);
        viewRect.height -= (i.bottom + viewRect.y);

        SynthStyle style = context.getStyle();
        Font f = style.getFont(context);
        g.setFont(f);
        FontMetrics fm = SwingUtilities2.getFontMetrics(c, g, f);
        FontMetrics accFM = SwingUtilities2.getFontMetrics(c, g,
                                 accContext.getStyle().
                                             getFont(accContext));

        // get Accelerator text
        KeyStroke accelerator =  b.getAccelerator();
        String acceleratorText = "";
        if (accelerator != null) {
            int modifiers = accelerator.getModifiers();
            if (modifiers > 0) {
                acceleratorText = KeyEvent.getKeyModifiersText(modifiers);
                acceleratorText += acceleratorDelimiter;
	    }

            int keyCode = accelerator.getKeyCode();
            if (keyCode != 0) {
                acceleratorText += KeyEvent.getKeyText(keyCode);
            } else {
                acceleratorText += accelerator.getKeyChar();
            }
        }
        
        // layoutl the text and icon
        String text = layoutMenuItem(context, fm, accContext,
            b.getText(), accFM, acceleratorText, b.getIcon(),
            checkIcon, arrowIcon,
            b.getVerticalAlignment(), b.getHorizontalAlignment(),
            b.getVerticalTextPosition(), b.getHorizontalTextPosition(),
            viewRect, iconRect, textRect, acceleratorRect, 
            checkIconRect, arrowIconRect,
            b.getText() == null ? 0 : defaultTextIconGap,
            defaultTextIconGap, useCheckAndArrow
        );

        // Paint the Check
        if (checkIcon != null && useCheckAndArrow ) {
            SynthIcon.paintIcon(checkIcon, context, g, checkIconRect.x,
                    checkIconRect.y, checkIconRect.width, checkIconRect.height);
        }

        // Paint the Icon
        if(b.getIcon() != null) {
            Icon icon;
            if(!model.isEnabled()) {
                icon = (Icon) b.getDisabledIcon();
            } else if(model.isPressed() && model.isArmed()) {
                icon = (Icon) b.getPressedIcon();
                if(icon == null) {
                    // Use default icon
                    icon = (Icon) b.getIcon();
                } 
            } else {
                icon = (Icon) b.getIcon();
            }
              
            if (icon!=null) {
                SynthIcon.paintIcon(icon, context, g, iconRect.x,
                    iconRect.y, iconRect.width, iconRect.height);
            }
        }

        // Draw the Text
        if(text != null) {
 	    View v = (View) c.getClientProperty(BasicHTML.propertyKey);
 	    if (v != null) {
 		v.paint(g, textRect);
 	    } else {
                g.setColor(style.getColor(context, ColorType.TEXT_FOREGROUND));
                g.setFont(style.getFont(context));
                style.getGraphicsUtils(context).paintText(context, g, text,
                        textRect.x, textRect.y, b.getDisplayedMnemonicIndex());
	    }
	}
	
        // Draw the Accelerator Text
        if(acceleratorText != null && !acceleratorText.equals("")) {
            // Get the maxAccWidth from the parent to calculate the offset.
            int accOffset = 0;
            Container parent = b.getParent();
            if (parent != null && parent instanceof JPopupMenu) {
                SynthPopupMenuUI popupUI = (SynthPopupMenuUI)
                                       ((JPopupMenu)parent).getUI();
                if (popupUI != null) {
                    // Calculate the offset, with which the accelerator texts
                    // will be drawn with.
                    int max = popupUI.getMaxAcceleratorWidth();
                    if (max > 0) {
                        accOffset = max - acceleratorRect.width;
                    }
                }
            }

            SynthStyle accStyle = accContext.getStyle();

            g.setColor(accStyle.getColor(accContext,
                                         ColorType.TEXT_FOREGROUND));
            g.setFont(accStyle.getFont(accContext));
            accStyle.getGraphicsUtils(accContext).paintText(
                     accContext, g, acceleratorText, acceleratorRect.x -
                     accOffset, acceleratorRect.y, -1);
        }

        // Paint the Arrow
        if (arrowIcon != null && useCheckAndArrow) {
            SynthIcon.paintIcon(arrowIcon, context, g, arrowIconRect.x,
                    arrowIconRect.y, arrowIconRect.width, arrowIconRect.height);
        }
    }

    /** 
     * Compute and return the location of the icons origin, the 
     * location of origin of the text baseline, and a possibly clipped
     * version of the compound labels string.  Locations are computed
     * relative to the viewRect rectangle. 
     */

    private static String layoutMenuItem(
        SynthContext context,
        FontMetrics fm,
        SynthContext accContext,
        String text,
        FontMetrics fmAccel,
        String acceleratorText,
        Icon icon,
        Icon checkIcon,
        Icon arrowIcon,
        int verticalAlignment,
        int horizontalAlignment,