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Viewing changes to flamingo/src/main/java/org/pushingpixels/flamingo/internal/utils/ButtonSizingUtils.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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flamingo/src/main/java/org/pushingpixels/flamingo/internal/utils/ButtonSizingUtils.java
 
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/*
 
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 * Copyright (c) 2005-2010 Flamingo 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 Flamingo 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.flamingo.internal.utils;
 
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import java.awt.*;
 
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import java.awt.image.BufferedImage;
 
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import java.beans.PropertyChangeEvent;
 
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import java.beans.PropertyChangeListener;
 
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import javax.swing.*;
 
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public class ButtonSizingUtils {
 
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        private static ButtonSizingUtils instance;
 
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        private Insets outsets;
 
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        private Insets toggleOutsets;
 
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        public static synchronized ButtonSizingUtils getInstance() {
 
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                if (instance == null)
 
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                        instance = new ButtonSizingUtils();
 
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                return instance;
 
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        }
 
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        private ButtonSizingUtils() {
 
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                this.outsets = this.syncOutsets(new JButton(""));
 
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                this.toggleOutsets = this.syncOutsets(new JToggleButton(""));
 
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                UIManager.addPropertyChangeListener(new PropertyChangeListener() {
 
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                        @Override
 
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                        public void propertyChange(PropertyChangeEvent evt) {
 
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                                if ("lookAndFeel".equals(evt.getPropertyName())) {
 
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                                        outsets = syncOutsets(new JButton(""));
 
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                                        toggleOutsets = syncOutsets(new JToggleButton(""));
 
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                                }
 
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                        }
 
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                });
 
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        }
 
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        private Insets syncOutsets(AbstractButton renderer) {
 
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                JPanel panel = new JPanel(null);
 
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                renderer.putClientProperty("JButton.buttonStyle", "square");
 
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                renderer.setFocusable(false);
 
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                renderer.setOpaque(false);
 
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                panel.add(renderer);
 
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                renderer.setBounds(0, 0, 100, 50);
 
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                GraphicsEnvironment e = GraphicsEnvironment
 
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                                .getLocalGraphicsEnvironment();
 
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                GraphicsDevice d = e.getDefaultScreenDevice();
 
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                GraphicsConfiguration c = d.getDefaultConfiguration();
 
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                BufferedImage compatibleImage = c.createCompatibleImage(100, 50,
 
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                                Transparency.TRANSLUCENT);
 
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                renderer.paint(compatibleImage.getGraphics());
 
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                // analyze top
 
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                int top = 0;
 
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                for (int i = 0; i < 25; i++) {
 
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                        int rgba = compatibleImage.getRGB(50, i);
 
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                        int alpha = (rgba >>> 24) & 0xFF;
 
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                        if (alpha == 255) {
 
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                                top = i;
 
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                                break;
 
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                        }
 
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                }
 
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                // analyze bottom
 
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                int bottom = 0;
 
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                for (int i = 49; i > 25; i--) {
 
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                        int rgba = compatibleImage.getRGB(50, i);
 
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                        int alpha = (rgba >>> 24) & 0xFF;
 
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                        if (alpha == 255) {
 
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                                bottom = 49 - i;
 
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                                break;
 
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                        }
 
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                }
 
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                // analyze left
 
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                int left = 0;
 
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                for (int i = 0; i < 50; i++) {
 
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                        int rgba = compatibleImage.getRGB(i, 25);
 
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                        int alpha = (rgba >>> 24) & 0xFF;
 
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                        if (alpha == 255) {
 
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                                left = i;
 
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                                break;
 
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                        }
 
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                }
 
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                // analyze right
 
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                int right = 0;
 
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                for (int i = 99; i > 50; i--) {
 
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                        int rgba = compatibleImage.getRGB(i, 25);
 
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                        int alpha = (rgba >>> 24) & 0xFF;
 
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                        if (alpha == 255) {
 
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                                right = 99 - i;
 
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                                break;
 
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                        }
 
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                }
 
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                return new Insets(top, left, bottom, right);
 
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        }
 
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        public Insets getOutsets() {
 
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                return new Insets(outsets.top, outsets.left, outsets.bottom,
 
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                                outsets.right);
 
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        }
 
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        public Insets getToggleOutsets() {
 
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                return new Insets(toggleOutsets.top, toggleOutsets.left,
 
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                                toggleOutsets.bottom, toggleOutsets.right);
 
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        }
 
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}