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* Copyright (c) 2005-2010 Substance Kirill Grouchnikov. All Rights Reserved.
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* o Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* o Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* o Neither the name of Substance Kirill Grouchnikov nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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package org.pushingpixels.substance.internal.ui;
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import java.awt.Color;
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import java.awt.Graphics;
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import javax.swing.JComponent;
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import javax.swing.JPanel;
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import javax.swing.plaf.*;
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import javax.swing.plaf.basic.BasicPanelUI;
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import org.pushingpixels.substance.api.SubstanceLookAndFeel;
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import org.pushingpixels.substance.internal.painter.BackgroundPaintingUtils;
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import org.pushingpixels.substance.internal.utils.SubstanceColorUtilities;
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import org.pushingpixels.substance.internal.utils.SubstanceCoreUtilities;
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* UI for panels in <b>Substance</b> look and feel.
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* @author Kirill Grouchnikov
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public class SubstancePanelUI extends BasicPanelUI {
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* @see javax.swing.plaf.ComponentUI#createUI(javax.swing.JComponent)
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public static ComponentUI createUI(JComponent comp) {
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SubstanceCoreUtilities.testComponentCreationThreadingViolation(comp);
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return new SubstancePanelUI();
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* javax.swing.plaf.basic.BasicPanelUI#installDefaults(javax.swing.JPanel)
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protected void installDefaults(JPanel p) {
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super.installDefaults(p);
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// support for per-window skins
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Color backgr = p.getBackground();
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if ((backgr == null) || (backgr instanceof UIResource)) {
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Color backgroundFillColor = SubstanceColorUtilities
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.getBackgroundFillColor(p);
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// fix for issue 436 - logic in getBackground() of
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// custom panels can result in null value
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if (backgroundFillColor != null) {
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p.setBackground(new ColorUIResource(backgroundFillColor));
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* @see javax.swing.plaf.ComponentUI#update(java.awt.Graphics,
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* javax.swing.JComponent)
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public void update(Graphics g, JComponent c) {
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if (!SubstanceLookAndFeel.isCurrentLookAndFeel())
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if (toPaintBackground(c)) {
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BackgroundPaintingUtils.update(g, c, false);
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* Returns indication whether the panel background should be filled.
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* Component (should be {@link JPanel}).
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* @return <code>true</code> if the panel background should be filled with
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* the background color, <code>false</code> otherwise.
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protected boolean toPaintBackground(JComponent c) {
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return SubstanceCoreUtilities.isOpaque(c);