menubarpainter.java

来自「Mobile 应用程序使用 Java Micro Edition (Java M」· Java 代码 · 共 136 行

/*
 * MenuBarPainter.java %E%
 *
 * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package com.sun.java.swing.plaf.nimbus;

import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
import com.sun.java.swing.Painter;

/**
 */
public final class MenuBarPainter extends AbstractRegionPainter {
    //package private integers representing the available states that
    //this painter will paint. These are used when creating a new instance
    //of MenuBarPainter to determine which region/state is being painted
    //by that instance.
    static final int BACKGROUND_ENABLED = 1;
    static final int BORDER_ENABLED = 2;


    private int state; //refers to one of the static final ints above
    private PaintContext ctx;

    //the following 4 variables are reused during the painting code of the layers
    private Path2D path = new Path2D.Float();
    private Rectangle2D rect = new Rectangle2D.Float(0, 0, 0, 0);
    private RoundRectangle2D roundRect = new RoundRectangle2D.Float(0, 0, 0, 0, 0, 0);
    private Ellipse2D ellipse = new Ellipse2D.Float(0, 0, 0, 0);

    //All Colors used for painting are stored here. Ideally, only those colors being used
    //by a particular instance of MenuBarPainter would be created. For the moment at least,
    //however, all are created for each instance.
    private Color color1 = decodeColor("nimbusBlueGrey", 0.0f, -0.07016757f, 0.12941176f, 0);
    private Color color2 = decodeColor("nimbusBlueGrey", -0.027777791f, -0.10255819f, 0.23921567f, 0);
    private Color color3 = decodeColor("nimbusBlueGrey", -0.111111104f, -0.10654225f, 0.23921567f, -29);
    private Color color4 = decodeColor("nimbusBlueGrey", 0.0f, -0.110526316f, 0.25490195f, -255);
    private Color color5 = decodeColor("nimbusBorder", 0.0f, 0.0f, 0.0f, 0);


    //Array of current component colors, updated in each paint call
    private Object[] componentColors;

    public MenuBarPainter(PaintContext ctx, int state) {
        super();
        this.state = state;
        this.ctx = ctx;
    }

    @Override
    protected void doPaint(Graphics2D g, JComponent c, int width, int height, Object[] extendedCacheKeys) {
        //populate componentColors array with colors calculated in getExtendedCacheKeys call
        componentColors = extendedCacheKeys;
        //generate this entire method. Each state/bg/fg/border combo that has
        //been painted gets its own KEY and paint method.
        switch(state) {
            case BACKGROUND_ENABLED: paintBackgroundEnabled(g); break;
            case BORDER_ENABLED: paintBorderEnabled(g); break;

        }
    }
        


    @Override
    protected final PaintContext getPaintContext() {
        return ctx;
    }

    private void paintBackgroundEnabled(Graphics2D g) {
        rect = decodeRect1();
        g.setPaint(color1);
        g.fill(rect);
        rect = decodeRect2();
        g.setPaint(decodeGradient1(rect));
        g.fill(rect);

    }

    private void paintBorderEnabled(Graphics2D g) {
        rect = decodeRect3();
        g.setPaint(color5);
        g.fill(rect);

    }



    private Rectangle2D decodeRect1() {
            rect.setRect(decodeX(1.0f), //x
                         decodeY(0.0f), //y
                         decodeX(2.0f) - decodeX(1.0f), //width
                         decodeY(1.9523809f) - decodeY(0.0f)); //height
        return rect;
    }

    private Rectangle2D decodeRect2() {
            rect.setRect(decodeX(1.0f), //x
                         decodeY(0.0f), //y
                         decodeX(2.0f) - decodeX(1.0f), //width
                         decodeY(2.0f) - decodeY(0.0f)); //height
        return rect;
    }

    private Rectangle2D decodeRect3() {
            rect.setRect(decodeX(1.0f), //x
                         decodeY(2.0f), //y
                         decodeX(2.0f) - decodeX(1.0f), //width
                         decodeY(3.0f) - decodeY(2.0f)); //height
        return rect;
    }



    private Paint decodeGradient1(Shape s) {
        Rectangle2D bounds = s.getBounds2D();
        float x = (float)bounds.getX();
        float y = (float)bounds.getY();
        float w = (float)bounds.getWidth();
        float h = (float)bounds.getHeight();
        return decodeGradient((1.0f * w) + x, (0.0f * h) + y, (1.0f * w) + x, (1.0f * h) + y,
                new float[] { 0.0f,0.015f,0.03f,0.23354445f,0.7569444f },
                new Color[] { color2,
                            decodeColor(color2,color3,0.5f),
                            color3,
                            decodeColor(color3,color4,0.5f),
                            color4});
    }


}