KickJava   Java API By Example, From Geeks To Geeks.

Java > Open Source Codes > com > sun > java > swing > plaf > nimbus > MenuItemPainter


1 /*
2  * MenuItemPainter.java %E%
3  *
4  * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
5  * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
6  */
7 package com.sun.java.swing.plaf.nimbus;
8
9 import java.awt.*;
10 import java.awt.geom.*;
11 import java.awt.image.*;
12 import javax.swing.*;
13 import com.sun.java.swing.Painter;
14
15 /**
16  */
17 public final class MenuItemPainter extends AbstractRegionPainter {
18     //package private integers representing the available states that
19 //this painter will paint. These are used when creating a new instance
20 //of MenuItemPainter to determine which region/state is being painted
21 //by that instance.
22 static final int BACKGROUND_DISABLED = 1;
23     static final int BACKGROUND_ENABLED = 2;
24     static final int BACKGROUND_MOUSEOVER = 3;
25
26
27     private int state; //refers to one of the static final ints above
28 private PaintContext ctx;
29
30     //the following 4 variables are reused during the painting code of the layers
31 private Path2D path = new Path2D.Float();
32     private Rectangle2D rect = new Rectangle2D.Float(0, 0, 0, 0);
33     private RoundRectangle2D roundRect = new RoundRectangle2D.Float(0, 0, 0, 0, 0, 0);
34     private Ellipse2D ellipse = new Ellipse2D.Float(0, 0, 0, 0);
35
36     //All Colors used for painting are stored here. Ideally, only those colors being used
37 //by a particular instance of MenuItemPainter would be created. For the moment at least,
38 //however, all are created for each instance.
39 private Color color1 = decodeColor("nimbusSelection", 0.0f, 0.0f, 0.0f, 0);
40
41
42     //Array of current component colors, updated in each paint call
43 private Object JavaDoc[] componentColors;
44
45     public MenuItemPainter(PaintContext ctx, int state) {
46         super();
47         this.state = state;
48         this.ctx = ctx;
49     }
50
51     @Override JavaDoc
52     protected void doPaint(Graphics2D g, JComponent c, int width, int height, Object JavaDoc[] extendedCacheKeys) {
53         //populate componentColors array with colors calculated in getExtendedCacheKeys call
54 componentColors = extendedCacheKeys;
55         //generate this entire method. Each state/bg/fg/border combo that has
56 //been painted gets its own KEY and paint method.
57 switch(state) {
58             case BACKGROUND_MOUSEOVER: paintBackgroundMouseOver(g); break;
59
60         }
61     }
62         
63
64
65     @Override JavaDoc
66     protected final PaintContext getPaintContext() {
67         return ctx;
68     }
69
70     private void paintBackgroundMouseOver(Graphics2D g) {
71         rect = decodeRect1();
72         g.setPaint(color1);
73         g.fill(rect);
74
75     }
76
77
78
79     private Rectangle2D decodeRect1() {
80             rect.setRect(decodeX(1.0f), //x
81 decodeY(1.0f), //y
82 decodeX(2.0f) - decodeX(1.0f), //width
83 decodeY(2.0f) - decodeY(1.0f)); //height
84 return rect;
85     }
86
87
88
89
90 }
91
Popular Tags