01: /*
02: * Copyright (c) 2005-2008 Substance Kirill Grouchnikov. All Rights Reserved.
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * o Redistributions of source code must retain the above copyright notice,
08: * this list of conditions and the following disclaimer.
09: *
10: * o Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * o Neither the name of Substance Kirill Grouchnikov nor the names of
15: * its contributors may be used to endorse or promote products derived
16: * from this software without specific prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
20: * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
21: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
22: * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
23: * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
24: * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
25: * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
26: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
27: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
28: * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29: */
30: package org.jvnet.substance.painter;
31:
32: import java.awt.*;
33:
34: import javax.swing.JTabbedPane;
35:
36: import org.jvnet.substance.SubstanceTabbedPaneUI;
37:
38: /**
39: * Decay translucency {@link ControlBackgroundComposite}. The component is
40: * painted translucent, the translucency is computed based on the distance to
41: * the closest active sibling. Currently this composite is relevant only for
42: * {@link JTabbedPane}s.
43: *
44: * @author Kirill Grouchnikov
45: */
46: public class DecayControlBackgroundComposite extends
47: ControlBackgroundComposite {
48: /*
49: * (non-Javadoc)
50: *
51: * @see org.jvnet.substance.painter.ControlBackgroundComposite#getBackgroundComposite(java.awt.Component,
52: * java.awt.Container, int, boolean)
53: */
54: public Composite getBackgroundComposite(Component component,
55: Container container, int componentIndex,
56: boolean isPaintedActive) {
57: if (isPaintedActive)
58: return AlphaComposite.SrcOver;
59:
60: if ((container instanceof JTabbedPane) && (componentIndex >= 0)) {
61: JTabbedPane tabPane = (JTabbedPane) container;
62: SubstanceTabbedPaneUI ui = (SubstanceTabbedPaneUI) tabPane
63: .getUI();
64: Rectangle tabRect = ui.getTabRectangle(componentIndex);
65: Rectangle selectedTabRect = ui.getTabRectangle(tabPane
66: .getSelectedIndex());
67: int dx = selectedTabRect.x + selectedTabRect.width / 2
68: - tabRect.x - tabRect.width / 2;
69: int dy = selectedTabRect.y + selectedTabRect.height / 2
70: - tabRect.y - tabRect.height / 2;
71: double dist = Math.pow(dx * dx + dy * dy, 0.3);
72: double decay = 1.0 - Math.log(1.0 + dist) / 7.0;
73: if (decay < 0.2)
74: decay = 0.2;
75: return AlphaComposite.getInstance(AlphaComposite.SRC_OVER,
76: (float) decay);
77: }
78:
79: return AlphaComposite.SrcOver;
80: }
81: }
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