01: /*BEGIN_COPYRIGHT_BLOCK
02: *
03: * Copyright (c) 2001-2007, JavaPLT group at Rice University (javaplt@rice.edu)
04: * All rights reserved.
05: *
06: * Redistribution and use in source and binary forms, with or without
07: * modification, are permitted provided that the following conditions are met:
08: * * Redistributions of source code must retain the above copyright
09: * notice, this list of conditions and the following disclaimer.
10: * * Redistributions in binary form must reproduce the above copyright
11: * notice, this list of conditions and the following disclaimer in the
12: * documentation and/or other materials provided with the distribution.
13: * * Neither the names of DrJava, the JavaPLT group, Rice University, nor the
14: * names of its contributors may be used to endorse or promote products
15: * derived from this software without specific prior written permission.
16: *
17: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18: * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19: * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20: * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
21: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
22: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
23: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
24: * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
25: * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
26: * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
27: * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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29: * This software is Open Source Initiative approved Open Source Software.
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35: * END_COPYRIGHT_BLOCK*/
36:
37: package edu.rice.cs.util.swing;
38:
39: import javax.swing.*;
40: import java.awt.*;
41:
42: /** This icon takes the given icon and centers it into a canvas of the given width and height. This is like a canvas
43: * resize for Icons. If the new size is smaller than the icon's size, then the edges of the given icon are clipped.
44: */
45: public class CenteredIcon implements Icon {
46: private Icon _base;
47: private int _w = 0;
48: private int _h = 0;
49:
50: public CenteredIcon(Icon base, int width, int height) {
51: _base = base;
52: _w = width;
53: _h = height;
54: }
55:
56: public int getIconHeight() {
57: return _h;
58: }
59:
60: public int getIconWidth() {
61: return _w;
62: }
63:
64: public void paintIcon(Component c, Graphics g, int x, int y) {
65: Shape oldClip = g.getClip();
66: g.setClip(x, y, _w, _h);
67: int centerX = x + (_w / 2);
68: int centerY = y + (_h / 2);
69: int subRadX = _base.getIconWidth() / 2;
70: int subRadY = _base.getIconHeight() / 2;
71: _base.paintIcon(c, g, centerX - subRadX, centerY - subRadY);
72: g.setClip(oldClip);
73: }
74:
75: public Icon getBaseIcon() {
76: return _base;
77: }
78: }
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