gradientpainter.java

软件开发的综合文档设计

// Copyright 2003 Sun Microsystems, Inc. All Rights Reserved.
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import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.synth.*;

public class GradientPainter extends SynthPainter {
    public void paintTextFieldBackground(SynthContext context,
                                          Graphics g, int x, int y,
                                          int w, int h) {
        // For simplicity this always recreates the GradientPaint, in a 
        // real app you should cache this to avoid garbage.
        Graphics2D g2 = (Graphics2D)g;
        g2.setPaint(new GradientPaint((float)x, (float)y, Color.WHITE,
                   (float)(x + w), (float)(y + h), Color.RED));
        g2.fillRect(x, y, w, h);
        g2.setPaint(null);
    }
}