metalutils.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

/*
 * @(#)MetalUtils.java	1.39 05/11/17
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
 
package javax.swing.plaf.metal;

import javax.swing.plaf.*;
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
import java.lang.ref.*;
import java.util.*;
import sun.swing.CachedPainter;
import sun.swing.ImageIconUIResource;

/**
 * This is a dumping ground for random stuff we want to use in several places.
 *
 * @version 1.39 11/17/05
 * @author Steve Wilson
 */

class MetalUtils {

    static void drawFlush3DBorder(Graphics g, Rectangle r) {
        drawFlush3DBorder(g, r.x, r.y, r.width, r.height);
    }

    /**
      * This draws the "Flush 3D Border" which is used throughout the Metal L&F
      */
    static void drawFlush3DBorder(Graphics g, int x, int y, int w, int h) {
        g.translate( x, y);
        g.setColor( MetalLookAndFeel.getControlDarkShadow() );
	g.drawRect( 0, 0, w-2, h-2 );
        g.setColor( MetalLookAndFeel.getControlHighlight() );
	g.drawRect( 1, 1, w-2, h-2 );
        g.setColor( MetalLookAndFeel.getControl() );
	g.drawLine( 0, h-1, 1, h-2 );
	g.drawLine( w-1, 0, w-2, 1 );
        g.translate( -x, -y);
    }

    /**
      * This draws a variant "Flush 3D Border"
      * It is used for things like pressed buttons.
      */
    static void drawPressed3DBorder(Graphics g, Rectangle r) {
        drawPressed3DBorder( g, r.x, r.y, r.width, r.height );
    }

    static void drawDisabledBorder(Graphics g, int x, int y, int w, int h) {
        g.translate( x, y);
        g.setColor( MetalLookAndFeel.getControlShadow() );
	g.drawRect( 0, 0, w-1, h-1 );
        g.translate(-x, -y);
    }

    /**
      * This draws a variant "Flush 3D Border"
      * It is used for things like pressed buttons.
      */
    static void drawPressed3DBorder(Graphics g, int x, int y, int w, int h) {
        g.translate( x, y);

        drawFlush3DBorder(g, 0, 0, w, h);

        g.setColor( MetalLookAndFeel.getControlShadow() );
	g.drawLine( 1, 1, 1, h-2 );
	g.drawLine( 1, 1, w-2, 1 );
        g.translate( -x, -y);
    }

    /**
      * This draws a variant "Flush 3D Border"
      * It is used for things like active toggle buttons.
      * This is used rarely.
      */
    static void drawDark3DBorder(Graphics g, Rectangle r) {
        drawDark3DBorder(g, r.x, r.y, r.width, r.height);
    }

    /**
      * This draws a variant "Flush 3D Border"
      * It is used for things like active toggle buttons.
      * This is used rarely.
      */
    static void drawDark3DBorder(Graphics g, int x, int y, int w, int h) {
        g.translate( x, y);

        drawFlush3DBorder(g, 0, 0, w, h);

        g.setColor( MetalLookAndFeel.getControl() );
	g.drawLine( 1, 1, 1, h-2 );
	g.drawLine( 1, 1, w-2, 1 );
        g.setColor( MetalLookAndFeel.getControlShadow() );
	g.drawLine( 1, h-2, 1, h-2 );
	g.drawLine( w-2, 1, w-2, 1 );
        g.translate( -x, -y);
    }

    static void drawButtonBorder(Graphics g, int x, int y, int w, int h, boolean active) {
        if (active) {
            drawActiveButtonBorder(g, x, y, w, h);	    
        } else {
            drawFlush3DBorder(g, x, y, w, h);
	}
    }

    static void drawActiveButtonBorder(Graphics g, int x, int y, int w, int h) {
        drawFlush3DBorder(g, x, y, w, h);
        g.setColor( MetalLookAndFeel.getPrimaryControl() );
	g.drawLine( x+1, y+1, x+1, h-3 );
	g.drawLine( x+1, y+1, w-3, x+1 );
        g.setColor( MetalLookAndFeel.getPrimaryControlDarkShadow() );
	g.drawLine( x+2, h-2, w-2, h-2 );
	g.drawLine( w-2, y+2, w-2, h-2 );
    }

    static void drawDefaultButtonBorder(Graphics g, int x, int y, int w, int h, boolean active) {
        drawButtonBorder(g, x+1, y+1, w-1, h-1, active);	    
        g.translate(x, y);
        g.setColor( MetalLookAndFeel.getControlDarkShadow() );
	g.drawRect( 0, 0, w-3, h-3 );
	g.drawLine( w-2, 0, w-2, 0);
	g.drawLine( 0, h-2, 0, h-2);
        g.translate(-x, -y);
    }
    
    static void drawDefaultButtonPressedBorder(Graphics g, int x, int y, int w, int h) {
        drawPressed3DBorder(g, x + 1, y + 1, w - 1, h - 1);
        g.translate(x, y);
        g.setColor(MetalLookAndFeel.getControlDarkShadow());
        g.drawRect(0, 0, w - 3, h - 3);
        g.drawLine(w - 2, 0, w - 2, 0);
        g.drawLine(0, h - 2, 0, h - 2);
        g.setColor(MetalLookAndFeel.getControl());
        g.drawLine(w - 1, 0, w - 1, 0);
        g.drawLine(0, h - 1, 0, h - 1);
        g.translate(-x, -y);
    }

    /*
     * Convenience function for determining ComponentOrientation.  Helps us
     * avoid having Munge directives throughout the code.
     */
    static boolean isLeftToRight( Component c ) {
        return c.getComponentOrientation().isLeftToRight();
    }
    
    static int getInt(Object key, int defaultValue) {
        Object value = UIManager.get(key);

        if (value instanceof Integer) {
            return ((Integer)value).intValue();
        }
        if (value instanceof String) {
            try {
                return Integer.parseInt((String)value);
            } catch (NumberFormatException nfe) {}
        }
        return defaultValue;
    }

    //
    // Ocean specific stuff.
    // 
    /**
     * Draws a radial type gradient. The gradient will be drawn vertically if
     * <code>vertical</code> is true, otherwise horizontally.
     * The UIManager key consists of five values:
     * r1 r2 c1 c2 c3. The gradient is broken down into four chunks drawn
     * in order from the origin.
     * <ol>
     * <li>Gradient r1 % of the size from c1 to c2
     * <li>Rectangle r2 % of the size in c2.
     * <li>Gradient r1 % of the size from c2 to c1
     * <li>The remaining size will be filled with a gradient from c1 to c3.
     * </ol>
     *
     * @param c Component rendering to
     * @param g Graphics to draw to.
     * @param key UIManager key used to look up gradient values.
     * @param x X coordinate to draw from
     * @param y Y coordinate to draw from
     * @param w Width to draw to
     * @param h Height to draw to
     * @param vertical Direction of the gradient
     * @return true if <code>key</code> exists, otherwise false.
     */
    static boolean drawGradient(Component c, Graphics g, String key,
                                int x, int y, int w, int h, boolean vertical) {
        java.util.List gradient = (java.util.List)UIManager.get(key);
        if (gradient == null || !(g instanceof Graphics2D)) {
            return false;
        }

        if (w <= 0 || h <= 0) {
            return true;
        }

        GradientPainter.INSTANCE.paint(
                c, (Graphics2D)g, gradient, x, y, w, h, vertical);
        return true;
    }


    private static class GradientPainter extends CachedPainter {
        /**
         * Instance used for painting.  This is the only instance that is
         * ever created.
         */
        public static final GradientPainter INSTANCE = new GradientPainter(8);

        // Size of images to create. For vertical gradients this is the width,