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Viewing changes to substance/src/main/java/org/pushingpixels/substance/api/painter/overlay/TopShadowOverlayPainter.java

  • Committer: Package Import Robot
  • Author(s): Felix Natter
  • Date: 2016-01-18 20:58:45 UTC
  • Revision ID: package-import@ubuntu.com-20160118205845-crbmrkda61qsi5qa
Tags: upstream-7.3+dfsg2
Import upstream version 7.3+dfsg2

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substance/src/main/java/org/pushingpixels/substance/api/painter/overlay/TopShadowOverlayPainter.java
 
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/*
 
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 * Copyright (c) 2005-2010 Substance Kirill Grouchnikov. All Rights Reserved.
 
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 *
 
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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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 * 
 
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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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 *     
 
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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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 *     
 
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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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 *     
 
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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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 */
 
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package org.pushingpixels.substance.api.painter.overlay;
 
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import java.awt.*;
 
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import javax.swing.SwingUtilities;
 
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import org.pushingpixels.substance.api.DecorationAreaType;
 
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import org.pushingpixels.substance.api.SubstanceSkin;
 
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import org.pushingpixels.substance.api.painter.SubstancePainterUtils;
 
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import org.pushingpixels.substance.internal.utils.SubstanceColorUtilities;
 
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/**
 
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 * Overlay painter that paints a few pixel-high drop shadow at the top edge of
 
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 * the relevant decoration area. This class is part of officially supported API.
 
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 * 
 
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 * @author Kirill Grouchnikov
 
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 * @since version 5.3
 
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 */
 
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public final class TopShadowOverlayPainter implements SubstanceOverlayPainter {
 
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        /**
 
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         * Singleton instance.
 
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         */
 
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        private static TopShadowOverlayPainter INSTANCE;
 
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        /**
 
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         * Returns the single instance of this class.
 
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         * 
 
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         * @return Single instance of this class.
 
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         */
 
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        public synchronized static TopShadowOverlayPainter getInstance() {
 
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                if (INSTANCE == null)
 
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                        INSTANCE = new TopShadowOverlayPainter();
 
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                return INSTANCE;
 
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        }
 
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        /**
 
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         * Private constructor to enforce that {@link #getInstance()} is the only
 
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         * way an application can get an instance of this class.
 
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         */
 
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        private TopShadowOverlayPainter() {
 
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        }
 
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        @Override
 
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        public void paintOverlay(Graphics2D graphics, Component comp,
 
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                        DecorationAreaType decorationAreaType, int width, int height,
 
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                        SubstanceSkin skin) {
 
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                Color shadowColor = SubstanceColorUtilities
 
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                                .getBackgroundFillColor(comp).darker();
 
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                // need to handle components "embedded" in other components
 
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                Component topMostWithSameDecorationAreaType = SubstancePainterUtils
 
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                                .getTopMostParentWithDecorationAreaType(comp,
 
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                                                decorationAreaType);
 
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                Point inTopMost = SwingUtilities.convertPoint(comp, new Point(0, 0),
 
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                                topMostWithSameDecorationAreaType);
 
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                int dy = inTopMost.y;
 
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                Graphics2D g2d = (Graphics2D) graphics.create();
 
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                g2d.translate(0, -dy);
 
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                g2d.setPaint(new GradientPaint(0, 0, SubstanceColorUtilities
 
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                                .getAlphaColor(shadowColor, 160), 0, 4, SubstanceColorUtilities
 
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                                .getAlphaColor(shadowColor, 16)));
 
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                g2d.fillRect(0, 0, comp.getWidth(), 4);
 
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                g2d.dispose();
 
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        }
 
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        @Override
 
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        public String getDisplayName() {
 
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                return "Top Shadow";
 
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        }
 
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}