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* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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package javax.swing.plaf.nimbus;
import java.awt.*;
import java.awt.geom.*;
import java.awt.image.*;
import javax.swing.*;
import javax.swing.Painter;
final class TreeCellPainter extends AbstractRegionPainter {
//package private integers representing the available states that
//this painter will paint. These are used when creating a new instance
//of TreeCellPainter to determine which region/state is being painted
//by that instance.
static final int BACKGROUND_ENABLED = 1;
static final int BACKGROUND_ENABLED_FOCUSED = 2;
static final int BACKGROUND_ENABLED_SELECTED = 3;
static final int BACKGROUND_SELECTED_FOCUSED = 4;
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 TreeCellPainter would be created. For the moment at least,
//however, all are created for each instance.
private Color color1 = decodeColor("nimbusFocus", 0.0f, 0.0f, 0.0f, 0);
private Color color2 = decodeColor("nimbusSelectionBackground", 0.0f, 0.0f, 0.0f, 0);
//Array of current component colors, updated in each paint call
private Object[] componentColors;
public TreeCellPainter(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_FOCUSED: paintBackgroundEnabledAndFocused(g); break;
case BACKGROUND_ENABLED_SELECTED: paintBackgroundEnabledAndSelected(g); break;
case BACKGROUND_SELECTED_FOCUSED: paintBackgroundSelectedAndFocused(g); break;
}
}
@Override
protected final PaintContext getPaintContext() {
return ctx;
}
private void paintBackgroundEnabledAndFocused(Graphics2D g) {
path = decodePath1();
g.setPaint(color1);
g.fill(path);
}
private void paintBackgroundEnabledAndSelected(Graphics2D g) {
rect = decodeRect1();
g.setPaint(color2);
g.fill(rect);
}
private void paintBackgroundSelectedAndFocused(Graphics2D g) {
rect = decodeRect1();
g.setPaint(color2);
g.fill(rect);
path = decodePath1();
g.setPaint(color1);
g.fill(path);
}
private Path2D decodePath1() {
path.reset();
path.moveTo(decodeX(0.0f), decodeY(0.0f));
path.lineTo(decodeX(0.0f), decodeY(3.0f));
path.lineTo(decodeX(3.0f), decodeY(3.0f));
path.lineTo(decodeX(3.0f), decodeY(0.0f));
path.lineTo(decodeX(0.24000001f), decodeY(0.0f));
path.lineTo(decodeX(0.24000001f), decodeY(0.24000001f));
path.lineTo(decodeX(2.7600007f), decodeY(0.24000001f));
path.lineTo(decodeX(2.7600007f), decodeY(2.7599998f));
path.lineTo(decodeX(0.24000001f), decodeY(2.7599998f));
path.lineTo(decodeX(0.24000001f), decodeY(0.0f));
path.lineTo(decodeX(0.0f), decodeY(0.0f));
path.closePath();
return path;
}
private Rectangle2D decodeRect1() {
rect.setRect(decodeX(0.0f), //x
decodeY(0.0f), //y
decodeX(3.0f) - decodeX(0.0f), //width
decodeY(3.0f) - decodeY(0.0f)); //height
return rect;
}
}