| 1 | // Jomic - a viewer for comic book archives. |
| 2 | // Copyright (C) 2004-2011 Thomas Aglassinger |
| 3 | // |
| 4 | // This program is free software: you can redistribute it and/or modify |
| 5 | // it under the terms of the GNU General Public License as published by |
| 6 | // the Free Software Foundation, either version 3 of the License, or |
| 7 | // (at your option) any later version. |
| 8 | // |
| 9 | // This program is distributed in the hope that it will be useful, |
| 10 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | // GNU General Public License for more details. |
| 13 | // |
| 14 | // You should have received a copy of the GNU General Public License |
| 15 | // along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 16 | package net.sf.jomic.common; |
| 17 | |
| 18 | import java.awt.Color; |
| 19 | import java.awt.Dimension; |
| 20 | import java.awt.Font; |
| 21 | import java.awt.FontMetrics; |
| 22 | import java.awt.Graphics; |
| 23 | import java.awt.Graphics2D; |
| 24 | import java.awt.RenderingHints; |
| 25 | import java.awt.Toolkit; |
| 26 | import java.awt.geom.AffineTransform; |
| 27 | import java.awt.image.RenderedImage; |
| 28 | import java.io.IOException; |
| 29 | import java.net.URL; |
| 30 | |
| 31 | import javax.imageio.ImageIO; |
| 32 | import javax.swing.BorderFactory; |
| 33 | import javax.swing.JFrame; |
| 34 | import javax.swing.JPanel; |
| 35 | import javax.swing.border.Border; |
| 36 | |
| 37 | /** |
| 38 | * Splash screen to show during loading. |
| 39 | * |
| 40 | * @author Thomas Aglassinger |
| 41 | */ |
| 42 | public class SplashScreen extends JFrame |
| 43 | { |
| 44 | private static final float SPLASH_WINDOW_SCALE = 0.3333F; |
| 45 | |
| 46 | public SplashScreen(String imageResourcePath) { |
| 47 | assert imageResourcePath != null; |
| 48 | |
| 49 | RenderedImage splashImage = readSplashImage(imageResourcePath); |
| 50 | float scale = splashScale(splashImage); |
| 51 | |
| 52 | JPanel imagePane = new SplashImagePane(splashImage, scale); |
| 53 | Border blackBorder = BorderFactory.createLineBorder(Color.black); |
| 54 | |
| 55 | imagePane.setBorder(blackBorder); |
| 56 | setResizable(false); |
| 57 | setUndecorated(true); |
| 58 | getContentPane().add(imagePane); |
| 59 | } |
| 60 | |
| 61 | public void dispose() { |
| 62 | super.dispose(); |
| 63 | } |
| 64 | |
| 65 | /** |
| 66 | * Show the splash screen in the center of the screen. |
| 67 | */ |
| 68 | public void splash() { |
| 69 | pack(); |
| 70 | |
| 71 | Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); |
| 72 | int x = (int) (screenSize.getWidth() - getWidth()) / 2; |
| 73 | int y = (int) (screenSize.getHeight() - getHeight()) / 2; |
| 74 | |
| 75 | setLocation(x, y); |
| 76 | setVisible(true); |
| 77 | } |
| 78 | |
| 79 | private RenderedImage readSplashImage(String imageResourcePath) { |
| 80 | URL imageUrl = SplashScreen.class.getResource(imageResourcePath); |
| 81 | |
| 82 | if (imageUrl == null) { |
| 83 | // Note: This must work without logging and localization being initialized. |
| 84 | throw new IllegalArgumentException("cannot find image resource: \"" + imageResourcePath + "\""); |
| 85 | } |
| 86 | RenderedImage splashImage; |
| 87 | |
| 88 | try { |
| 89 | splashImage = ImageIO.read(imageUrl); |
| 90 | } catch (IOException error) { |
| 91 | // If this failes, it most likely means that the default ImageIO |
| 92 | // cache directory got trashed. By default, it is located in the |
| 93 | // system temporary directory, for example "/tmp". You |
| 94 | // could try to completely remove and recreate this directory |
| 95 | // as described in the Jomic FAQ. |
| 96 | |
| 97 | // Note: This must work without logging and localization being initialized. |
| 98 | IllegalArgumentException error2 = new IllegalArgumentException( |
| 99 | "cannot read image resource: \"" + imageResourcePath + "\""); |
| 100 | |
| 101 | error2.initCause(error); |
| 102 | throw error2; |
| 103 | } |
| 104 | return splashImage; |
| 105 | } |
| 106 | |
| 107 | private float splashScale(RenderedImage splashImage) { |
| 108 | Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize(); |
| 109 | int screenWidth = (int) screenSize.getWidth(); |
| 110 | int screenHeight = (int) screenSize.getHeight(); |
| 111 | int actualImageWidth = splashImage.getWidth(); |
| 112 | int actualImageHeight = splashImage.getHeight(); |
| 113 | int targetImageWidth = (int) (SPLASH_WINDOW_SCALE * screenWidth); |
| 114 | int targetImageHeight = (int) (SPLASH_WINDOW_SCALE * screenHeight); |
| 115 | float widthScale = ((float) targetImageWidth) / actualImageWidth; |
| 116 | float heightScale = ((float) targetImageHeight) / actualImageHeight; |
| 117 | float scale = Math.min(widthScale, heightScale); |
| 118 | |
| 119 | return scale; |
| 120 | } |
| 121 | |
| 122 | /** |
| 123 | * JPanel to display the splash image, overlaid by application name and version information. |
| 124 | */ |
| 125 | private static class SplashImagePane extends JPanel |
| 126 | { |
| 127 | private static final float TEXT_INDENT_PERCENT = 0.97f; |
| 128 | private Font font; |
| 129 | private RenderedImage image; |
| 130 | private float scale; |
| 131 | |
| 132 | SplashImagePane(RenderedImage newImage, float newScale) { |
| 133 | assert newImage != null; |
| 134 | assert newScale > 0; |
| 135 | image = newImage; |
| 136 | scale = newScale; |
| 137 | |
| 138 | Dimension panelSize = new Dimension((int) (scale * image.getWidth()), (int) (scale * image.getHeight())); |
| 139 | |
| 140 | setPreferredSize(panelSize); |
| 141 | font = new Font(null); |
| 142 | } |
| 143 | |
| 144 | protected void paintComponent(Graphics g) { |
| 145 | assert g instanceof Graphics2D; |
| 146 | |
| 147 | Graphics2D g2 = (Graphics2D) g; |
| 148 | |
| 149 | g2.setFont(font); |
| 150 | g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON); |
| 151 | g2.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR); |
| 152 | |
| 153 | String text = "Jomic " + Version.VERSION_TAG; |
| 154 | FontMetrics metrics = g2.getFontMetrics(); |
| 155 | int textWidth = metrics.stringWidth(text); |
| 156 | int textHeight = metrics.getHeight(); |
| 157 | |
| 158 | g2.drawRenderedImage(image, AffineTransform.getScaleInstance(scale, scale)); |
| 159 | g2.drawString(text, |
| 160 | TEXT_INDENT_PERCENT * getWidth() - textWidth, |
| 161 | TEXT_INDENT_PERCENT * getHeight() - textHeight); |
| 162 | } |
| 163 | } |
| 164 | } |