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Viewing changes to laf-widget/src/main/java/org/pushingpixels/lafwidget/tabbed/DefaultTabPreviewPainter.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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laf-widget/src/main/java/org/pushingpixels/lafwidget/tabbed/DefaultTabPreviewPainter.java
 
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/*
 
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 * Copyright (c) 2005-2010 Laf-Widget 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 Laf-Widget 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.lafwidget.tabbed;
 
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import java.awt.*;
 
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import java.awt.image.BufferedImage;
 
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import javax.swing.JTabbedPane;
 
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import org.pushingpixels.lafwidget.LafWidgetUtilities;
 
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/**
 
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 * Default implementation of the tab preview painter. The tab preview is a
 
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 * scaled-down (as necessary) thumbnail of the relevant tab.
 
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 * 
 
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 * @author Kirill Grouchnikov
 
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 */
 
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public class DefaultTabPreviewPainter extends TabPreviewPainter {
 
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        /*
 
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         * (non-Javadoc)
 
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         * 
 
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         * @see org.pushingpixels.lafwidget.tabbed.TabPreviewPainter#hasPreview(javax.swing.JTabbedPane,
 
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         *      int)
 
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         */
 
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        @Override
 
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    public boolean hasPreview(JTabbedPane tabPane, int tabIndex) {
 
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                return (tabPane.getComponentAt(tabIndex) != null);
 
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        }
 
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        /*
 
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         * (non-Javadoc)
 
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         * 
 
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         * @see org.pushingpixels.lafwidget.tabbed.TabPreviewPainter#isSensitiveToEvents(javax.swing.JTabbedPane,
 
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         *      int)
 
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         */
 
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        @Override
 
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    public boolean isSensitiveToEvents(JTabbedPane tabPane, int tabIndex) {
 
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                return tabPane.isEnabledAt(tabIndex);
 
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        }
 
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        /*
 
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         * (non-Javadoc)
 
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         * 
 
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         * @see org.pushingpixels.lafwidget.tabbed.TabPreviewPainter#previewTab(javax.swing.JTabbedPane,
 
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         *      int, java.awt.Graphics, int, int, int, int)
 
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         */
 
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        @Override
 
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    public void previewTab(JTabbedPane tabPane, int tabIndex, Graphics g,
 
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                        int x, int y, int w, int h) {
 
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                Component tabComponent = tabPane.getComponentAt(tabIndex);
 
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                if (tabComponent == null)
 
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                        return;
 
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                // if (!tabComponent.isShowing())
 
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                // return;
 
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                int compWidth = tabComponent.getWidth();
 
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                int compHeight = tabComponent.getHeight();
 
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                if ((compWidth > 0) && (compHeight > 0)) {
 
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                        // draw tab component
 
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                        BufferedImage tempCanvas = new BufferedImage(compWidth, compHeight,
 
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                                        BufferedImage.TYPE_INT_ARGB);
 
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                        Graphics tempCanvasGraphics = tempCanvas.getGraphics();
 
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                        tabComponent.paint(tempCanvasGraphics);
 
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                        // check if need to scale down
 
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                        double coef = Math.min((double) w / (double) compWidth, (double) h
 
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                                        / (double) compHeight);
 
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                        // fix for issue 177 in Substance - disabled tabs painted in
 
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                        // 50% opacity.
 
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                        Graphics2D g2 = (Graphics2D) g.create();
 
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                        if (!tabPane.isEnabledAt(tabIndex)) {
 
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                                g2.setComposite(AlphaComposite.getInstance(
 
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                                                AlphaComposite.SRC_OVER, 0.5f));
 
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                        }
 
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                        if (coef < 1.0) {
 
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                                int sdWidth = (int) (coef * compWidth);
 
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                                int sdHeight = (int) (coef * compHeight);
 
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                                int dx = (w - sdWidth) / 2;
 
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                                int dy = (h - sdHeight) / 2;
 
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                                g2.drawImage(LafWidgetUtilities.createThumbnail(tempCanvas,
 
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                                                sdWidth), dx, dy, null);
 
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                        } else {
 
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                                // System.out.println("Putting " + frame.hashCode() + "
 
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                                // -> " + snapshot.hashCode());
 
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                                g2.drawImage(tempCanvas, 0, 0, null);
 
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                        }
 
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                        g2.dispose();
 
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                }
 
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        }
 
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        /*
 
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         * (non-Javadoc)
 
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         * 
 
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         * @see org.pushingpixels.lafwidget.tabbed.TabPreviewPainter#hasPreviewWindow(javax.swing.JTabbedPane,
 
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         *      int)
 
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         */
 
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        @Override
 
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    public boolean hasPreviewWindow(JTabbedPane tabPane, int tabIndex) {
 
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                return true;
 
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        }
 
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        /*
 
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         * (non-Javadoc)
 
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         * 
 
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         * @see org.pushingpixels.lafwidget.tabbed.TabPreviewPainter#hasOverviewDialog(javax.swing.JTabbedPane)
 
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         */
 
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        @Override
 
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    public boolean hasOverviewDialog(JTabbedPane tabPane) {
 
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                return true;
 
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        }
 
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}