svn-gvsig-desktop / branches / org.gvsig.desktop-2018a / org.gvsig.desktop.plugin / org.gvsig.app / org.gvsig.app.mainplugin / src / main / java / org / gvsig / app / gui / ProjectPreviewPanel.java @ 43891
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1 | 43506 | jjdelcerro | /*
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2 | * Copyright (C) 2017 gvSIG Association
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3 | *
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4 | * This program is free software: you can redistribute it and/or modify
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5 | * it under the terms of the GNU General Public License as published by
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6 | * the Free Software Foundation, either version 3 of the License, or
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7 | * (at your option) any later version.
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8 | *
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9 | * This program is distributed in the hope that it will be useful,
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10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 | * GNU General Public License for more details.
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13 | *
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14 | * You should have received a copy of the GNU General Public License
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15 | * along with this program. If not, see <http://www.gnu.org/licenses/>.
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16 | */
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17 | package org.gvsig.app.gui; |
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18 | |||
19 | import java.awt.Color; |
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20 | import java.awt.Dimension; |
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21 | import java.awt.Graphics; |
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22 | import java.awt.Image; |
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23 | import java.beans.PropertyChangeEvent; |
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24 | import java.beans.PropertyChangeListener; |
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25 | import java.io.File; |
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26 | import java.util.zip.ZipEntry; |
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27 | import java.util.zip.ZipFile; |
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28 | import javax.imageio.ImageIO; |
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29 | import javax.swing.JFileChooser; |
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30 | import javax.swing.JPanel; |
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31 | import org.slf4j.Logger; |
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32 | import org.slf4j.LoggerFactory; |
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33 | |||
34 | public class ProjectPreviewPanel extends JPanel |
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35 | implements PropertyChangeListener { |
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36 | |||
37 | private static final Logger LOG = LoggerFactory.getLogger(ProjectPreviewPanel.class); |
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38 | private static final long serialVersionUID = -8314273002829710953L; |
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39 | |||
40 | private int width, height; |
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41 | // private ImageIcon icon;
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42 | private Image image; |
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43 | private static final int ACCSIZE = 155; |
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44 | private final Color bg; |
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45 | |||
46 | public ProjectPreviewPanel() {
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47 | setPreferredSize(new Dimension(ACCSIZE, -1)); |
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48 | bg = getBackground(); |
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49 | } |
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50 | |||
51 | @Override
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52 | public void propertyChange(PropertyChangeEvent e) { |
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53 | String propertyName = e.getPropertyName();
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54 | |||
55 | // Make sure we are responding to the right event.
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56 | if (propertyName.equals(JFileChooser.SELECTED_FILE_CHANGED_PROPERTY)) { |
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57 | File selection = (File)e.getNewValue(); |
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58 | if (selection == null) { |
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59 | return;
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60 | } |
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61 | String name = selection.getAbsolutePath();
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62 | if ( name != null ) { |
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63 | try {
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64 | ZipFile zfile = new ZipFile(name); |
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65 | ZipEntry entry = zfile.getEntry("preview.jpg"); |
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66 | if( entry != null ) { |
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67 | image = ImageIO.read(zfile.getInputStream(entry));
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68 | scaleImage(); |
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69 | } else {
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70 | image = null;
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71 | } |
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72 | repaint(); |
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73 | 43607 | jjdelcerro | } catch(Throwable ex) { |
74 | LOG.warn("Can't load project preview. Ignore preview.",ex);
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75 | 43506 | jjdelcerro | } |
76 | } |
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77 | } |
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78 | } |
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79 | |||
80 | private void scaleImage() { |
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81 | width = image.getWidth(this);
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82 | height = image.getHeight(this);
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83 | double ratio = 1.0; |
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84 | |||
85 | /*
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86 | * Determine how to scale the image. Since the accessory can expand
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87 | * vertically make sure we don't go larger than 150 when scaling
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88 | * vertically.
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89 | */
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90 | if (width >= height) {
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91 | ratio = (double)(ACCSIZE-5) / width; |
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92 | width = ACCSIZE-5;
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93 | height = (int)(height * ratio);
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94 | } |
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95 | else {
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96 | if (getHeight() > 150) { |
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97 | ratio = (double)(ACCSIZE-5) / height; |
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98 | height = ACCSIZE-5;
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99 | width = (int)(width * ratio);
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100 | } |
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101 | else {
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102 | ratio = (double)getHeight() / height;
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103 | height = getHeight(); |
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104 | width = (int)(width * ratio);
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105 | } |
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106 | } |
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107 | |||
108 | image = image.getScaledInstance(width, height, Image.SCALE_DEFAULT);
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109 | } |
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110 | |||
111 | @Override
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112 | public void paintComponent(Graphics g) { |
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113 | g.setColor(bg); |
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114 | |||
115 | /*
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116 | * If we don't do this, we will end up with garbage from previous
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117 | * images if they have larger sizes than the one we are currently
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118 | * drawing. Also, it seems that the file list can paint outside
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119 | * of its rectangle, and will cause odd behavior if we don't clear
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120 | * or fill the rectangle for the accessory before drawing. This might
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121 | * be a bug in JFileChooser.
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122 | */
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123 | g.fillRect(0, 0, ACCSIZE, getHeight()); |
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124 | if( image != null ) { |
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125 | g.drawImage(image, getWidth() / 2 - width / 2 + 5, |
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126 | getHeight() / 2 - height / 2, this); |
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127 | } |
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128 | } |
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129 | |||
130 | } |