scrollbarscrollbarthumbpainter.java

来自「Mobile 应用程序使用 Java Micro Edition (Java M」· Java 代码 · 共 363 行 · 第 1/2 页

/*
 * ScrollBarScrollBarThumbPainter.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 ScrollBarScrollBarThumbPainter extends AbstractRegionPainter {
    //package private integers representing the available states that
    //this painter will paint. These are used when creating a new instance
    //of ScrollBarScrollBarThumbPainter to determine which region/state is being painted
    //by that instance.
    static final int BACKGROUND_DISABLED = 1;
    static final int BACKGROUND_ENABLED = 2;
    static final int BACKGROUND_FOCUSED = 3;
    static final int BACKGROUND_MOUSEOVER = 4;
    static final int BACKGROUND_PRESSED = 5;


    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 ScrollBarScrollBarThumbPainter would be created. For the moment at least,
    //however, all are created for each instance.
    private Color color1 = decodeColor("nimbusBase", 5.1498413E-4f, 0.18061227f, -0.35686278f, 0);
    private Color color2 = decodeColor("nimbusBase", 5.1498413E-4f, -0.21018237f, -0.18039218f, 0);
    private Color color3 = decodeColor("nimbusBase", 7.13408E-4f, -0.53277314f, 0.25098038f, 0);
    private Color color4 = decodeColor("nimbusBase", -0.07865167f, -0.6317617f, 0.44313723f, 0);
    private Color color5 = decodeColor("nimbusBase", 5.1498413E-4f, -0.44340658f, 0.26666665f, 0);
    private Color color6 = decodeColor("nimbusBase", 5.1498413E-4f, -0.4669379f, 0.38039213f, 0);
    private Color color7 = decodeColor("nimbusBase", -0.07865167f, -0.56512606f, 0.45098037f, 0);
    private Color color8 = decodeColor("nimbusBase", -0.0017285943f, -0.362987f, 0.011764705f, 0);
    private Color color9 = decodeColor("nimbusBase", 5.2034855E-5f, -0.41753247f, 0.09803921f, -222);
    private Color color10 = new Color(255, 200, 0, 255);
    private Color color11 = decodeColor("nimbusBase", -0.0017285943f, -0.362987f, 0.011764705f, -255);
    private Color color12 = decodeColor("nimbusBase", 0.010237217f, -0.5621849f, 0.25098038f, 0);
    private Color color13 = decodeColor("nimbusBase", 0.08801502f, -0.6317773f, 0.4470588f, 0);
    private Color color14 = decodeColor("nimbusBase", 5.1498413E-4f, -0.45950285f, 0.34117645f, 0);
    private Color color15 = decodeColor("nimbusBase", -0.0017285943f, -0.48277313f, 0.45098037f, 0);
    private Color color16 = decodeColor("nimbusBase", 0.0f, -0.6357143f, 0.45098037f, 0);
    private Color color17 = decodeColor("nimbusBase", -0.57865167f, -0.6357143f, -0.54901963f, 0);
    private Color color18 = decodeColor("nimbusBase", 0.0013483167f, 0.29021162f, -0.33725494f, 0);
    private Color color19 = decodeColor("nimbusBase", 0.002908647f, -0.29012606f, -0.015686274f, 0);
    private Color color20 = decodeColor("nimbusBase", -8.738637E-4f, -0.40612245f, 0.21960783f, 0);
    private Color color21 = decodeColor("nimbusBase", 0.0f, -0.01765871f, 0.015686274f, 0);
    private Color color22 = decodeColor("nimbusBase", 0.0f, -0.12714285f, 0.1372549f, 0);
    private Color color23 = decodeColor("nimbusBase", 0.0018727183f, -0.23116884f, 0.31372547f, 0);
    private Color color24 = decodeColor("nimbusBase", -8.738637E-4f, -0.3579365f, -0.33725494f, 0);
    private Color color25 = decodeColor("nimbusBase", 0.004681647f, -0.3857143f, -0.36078435f, 0);


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

    public ScrollBarScrollBarThumbPainter(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 BACKGROUND_MOUSEOVER: paintBackgroundMouseOver(g); break;
            case BACKGROUND_PRESSED: paintBackgroundPressed(g); break;

        }
    }
        


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

    private void paintBackgroundEnabled(Graphics2D g) {
        path = decodePath1();
        g.setPaint(decodeGradient1(path));
        g.fill(path);
        path = decodePath2();
        g.setPaint(decodeGradient2(path));
        g.fill(path);
        path = decodePath3();
        g.setPaint(decodeGradient3(path));
        g.fill(path);
        path = decodePath4();
        g.setPaint(color10);
        g.fill(path);
        path = decodePath5();
        g.setPaint(decodeGradient4(path));
        g.fill(path);

    }

    private void paintBackgroundMouseOver(Graphics2D g) {
        path = decodePath1();
        g.setPaint(decodeGradient1(path));
        g.fill(path);
        path = decodePath2();
        g.setPaint(decodeGradient5(path));
        g.fill(path);
        path = decodePath3();
        g.setPaint(decodeGradient3(path));
        g.fill(path);
        path = decodePath4();
        g.setPaint(color10);
        g.fill(path);
        path = decodePath5();
        g.setPaint(decodeGradient4(path));
        g.fill(path);

    }

    private void paintBackgroundPressed(Graphics2D g) {
        path = decodePath1();
        g.setPaint(decodeGradient6(path));
        g.fill(path);
        path = decodePath2();
        g.setPaint(decodeGradient7(path));
        g.fill(path);
        path = decodePath3();
        g.setPaint(decodeGradient8(path));
        g.fill(path);
        path = decodePath4();
        g.setPaint(color10);
        g.fill(path);
        path = decodePath6();
        g.setPaint(decodeGradient9(path));
        g.fill(path);

    }



    private Path2D decodePath1() {
        path.reset();
        path.moveTo(decodeX(0.0f), decodeY(1.0f));
        path.lineTo(decodeX(0.0f), decodeY(1.0666667f));
        path.curveTo(decodeAnchorX(0.0f, 0.0f), decodeAnchorY(1.0666667222976685f, 6.0f), decodeAnchorX(1.0f, -10.0f), decodeAnchorY(2.0f, 0.0f), decodeX(1.0f), decodeY(2.0f));
        path.lineTo(decodeX(2.0f), decodeY(2.0f));
        path.curveTo(decodeAnchorX(2.0f, 10.0f), decodeAnchorY(2.0f, 0.0f), decodeAnchorX(3.0f, 0.0f), decodeAnchorY(1.0666667222976685f, 6.0f), decodeX(3.0f), decodeY(1.0666667f));
        path.lineTo(decodeX(3.0f), decodeY(1.0f));
        path.lineTo(decodeX(0.0f), decodeY(1.0f));
        path.closePath();
        return path;
    }

    private Path2D decodePath2() {
        path.reset();
        path.moveTo(decodeX(0.06666667f), decodeY(1.0f));
        path.lineTo(decodeX(0.06666667f), decodeY(1.0666667f));
        path.curveTo(decodeAnchorX(0.06666667014360428f, -0.045454545454545414f), decodeAnchorY(1.0666667222976685f, 8.45454545454545f), decodeAnchorX(1.0f, -5.863636363636354f), decodeAnchorY(1.933333396911621f, 0.0f), decodeX(1.0f), decodeY(1.9333334f));
        path.lineTo(decodeX(2.0f), decodeY(1.9333334f));
        path.curveTo(decodeAnchorX(2.0f, 5.909090909090935f), decodeAnchorY(1.933333396911621f, -3.552713678800501E-15f), decodeAnchorX(2.933333396911621f, -0.045454545454546746f), decodeAnchorY(1.0666667222976685f, 8.36363636363636f), decodeX(2.9333334f), decodeY(1.0666667f));
        path.lineTo(decodeX(2.9333334f), decodeY(1.0f));
        path.lineTo(decodeX(0.06666667f), decodeY(1.0f));
        path.closePath();
        return path;
    }