src/be/nikiroo/fanfix/reader/ui/GuiReaderViewerPanel.java

   1 package be.nikiroo.fanfix.reader.ui;
   2
   3 import java.awt.BorderLayout;
   4 import java.awt.EventQueue;
   5 import java.awt.Graphics2D;
   6 import java.awt.event.ActionEvent;
   7 import java.awt.event.ActionListener;
   8 import java.awt.image.BufferedImage;
   9
  10 import javax.swing.Icon;
  11 import javax.swing.ImageIcon;
  12 import javax.swing.JButton;
  13 import javax.swing.JEditorPane;
  14 import javax.swing.JLabel;
  15 import javax.swing.JPanel;
  16 import javax.swing.JProgressBar;
  17 import javax.swing.JScrollPane;
  18 import javax.swing.SwingConstants;
  19
  20 import be.nikiroo.fanfix.Instance;
  21 import be.nikiroo.fanfix.bundles.StringIdGui;
  22 import be.nikiroo.fanfix.data.Chapter;
  23 import be.nikiroo.fanfix.data.MetaData;
  24 import be.nikiroo.fanfix.data.Story;
  25 import be.nikiroo.utils.Image;
  26 import be.nikiroo.utils.ui.ImageUtilsAwt;
  27
  28 /**
  29  * A {@link JPanel} that will show a {@link Story} chapter on screen.
  30  *
  31  * @author niki
  32  */
  33 public class GuiReaderViewerPanel extends JPanel {
  34         private static final long serialVersionUID = 1L;
  35
  36         private boolean imageDocument;
  37         private Chapter chap;
  38         private JScrollPane scroll;
  39         private GuiReaderViewerTextOutput htmlOutput;
  40
  41         // text only:
  42         private JEditorPane text;
  43
  44         // image only:
  45         private JLabel image;
  46         private JProgressBar imageProgress;
  47         private int currentImage;
  48         private JButton left;
  49         private JButton right;
  50
  51         /**
  52          * Create a new viewer.
  53          *
  54          * @param story
  55          *            the {@link Story} to work on
  56          */
  57         public GuiReaderViewerPanel(Story story) {
  58                 this(story.getMeta(), story.getMeta().isImageDocument());
  59         }
  60
  61         /**
  62          * Create a new viewer.
  63          *
  64          * @param meta
  65          *            the {@link MetaData} of the story to show
  66          * @param isImageDocument
  67          *            TRUE if it is an image document, FALSE if not
  68          */
  69         public GuiReaderViewerPanel(MetaData meta, boolean isImageDocument) {
  70                 super(new BorderLayout());
  71
  72                 this.imageDocument = isImageDocument;
  73
  74                 this.text = new JEditorPane("text/html", "");
  75                 text.setEditable(false);
  76                 text.setAlignmentY(TOP_ALIGNMENT);
  77                 htmlOutput = new GuiReaderViewerTextOutput();
  78
  79                 image = new JLabel();
  80                 image.setHorizontalAlignment(SwingConstants.CENTER);
  81
  82                 scroll = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED,
  83                                 JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
  84                 scroll.getVerticalScrollBar().setUnitIncrement(16);
  85
  86                 if (!imageDocument) {
  87                         add(scroll, BorderLayout.CENTER);
  88                 } else {
  89                         imageProgress = new JProgressBar();
  90                         imageProgress.setStringPainted(true);
  91                         add(imageProgress, BorderLayout.SOUTH);
  92
  93                         JPanel main = new JPanel(new BorderLayout());
  94                         main.add(scroll, BorderLayout.CENTER);
  95
  96                         left = new JButton("<HTML>&nbsp; &nbsp; &lt; &nbsp; &nbsp;</HTML>");
  97                         left.addActionListener(new ActionListener() {
  98                                 @Override
  99                                 public void actionPerformed(ActionEvent e) {
 100                                         setImage(--currentImage);
 101                                 }
 102                         });
 103                         main.add(left, BorderLayout.WEST);
 104
 105                         right = new JButton("<HTML>&nbsp; &nbsp; &gt; &nbsp; &nbsp;</HTML>");
 106                         right.addActionListener(new ActionListener() {
 107                                 @Override
 108                                 public void actionPerformed(ActionEvent e) {
 109                                         setImage(++currentImage);
 110                                 }
 111                         });
 112                         main.add(right, BorderLayout.EAST);
 113
 114                         add(main, BorderLayout.CENTER);
 115                         main.invalidate();
 116                 }
 117
 118                 setChapter(meta.getResume());
 119         }
 120
 121         /**
 122          * Load the given chapter.
 123          * <p>
 124          * Will always be text for a non-image document.
 125          * <p>
 126          * Will be an image and left/right controls for an image-document, except
 127          * for chapter 0 which will be text (chapter 0 = resume).
 128          *
 129          * @param chap
 130          *            the chapter to load
 131          */
 132         public void setChapter(Chapter chap) {
 133                 this.chap = chap;
 134
 135                 if (!imageDocument) {
 136                         setText(chap);
 137                 } else {
 138                         left.setVisible(chap.getNumber() > 0);
 139                         right.setVisible(chap.getNumber() > 0);
 140                         imageProgress.setVisible(chap.getNumber() > 0);
 141
 142                         imageProgress.setMinimum(0);
 143                         imageProgress.setMaximum(chap.getParagraphs().size() - 1);
 144
 145                         if (chap.getNumber() == 0) {
 146                                 setText(chap);
 147                         } else {
 148                                 setImage(0);
 149                         }
 150                 }
 151         }
 152
 153         /**
 154          * Will set and display the current chapter text.
 155          *
 156          * @param chap
 157          *            the chapter to display
 158          */
 159         private void setText(final Chapter chap) {
 160                 new Thread(new Runnable() {
 161                         @Override
 162                         public void run() {
 163                                 final String content = htmlOutput.convert(chap);
 164                                 // Wait until size computations are correct
 165                                 while (!scroll.isValid()) {
 166                                         try {
 167                                                 Thread.sleep(1);
 168                                         } catch (InterruptedException e) {
 169                                         }
 170                                 }
 171
 172                                 setText(content);
 173                         }
 174                 }).start();
 175         }
 176
 177         /**
 178          * Actually set the text in the UI.
 179          * <p>
 180          * Do <b>NOT</b> use this method from the UI thread.
 181          *
 182          * @param content
 183          *            the text
 184          */
 185         private void setText(final String content) {
 186                 EventQueue.invokeLater(new Runnable() {
 187                         @Override
 188                         public void run() {
 189                                 text.setText(content);
 190                                 text.setCaretPosition(0);
 191                                 scroll.setViewportView(text);
 192                         }
 193                 });
 194         }
 195
 196         /**
 197          * Will set and display the current image, take care about the progression
 198          * and update the left and right cursors' <tt>enabled</tt> property.
 199          *
 200          * @param i
 201          *            the image index to load
 202          */
 203         private void setImage(int i) {
 204                 left.setEnabled(i > 0);
 205                 right.setEnabled(i + 1 < chap.getParagraphs().size());
 206
 207                 if (i < 0 || i >= chap.getParagraphs().size()) {
 208                         return;
 209                 }
 210
 211                 imageProgress.setValue(i);
 212                 imageProgress.setString(GuiReader.trans(StringIdGui.IMAGE_PROGRESSION,
 213                                 i + 1, chap.getParagraphs().size()));
 214
 215                 currentImage = i;
 216
 217                 final Image img = chap.getParagraphs().get(i).getContentImage();
 218
 219                 // prepare the viewport to get the right sizes later on
 220                 image.setIcon(null);
 221                 scroll.setViewportView(image);
 222
 223                 new Thread(new Runnable() {
 224                         @Override
 225                         public void run() {
 226                                 // Wait until size computations are correct
 227                                 while (!scroll.isValid()) {
 228                                         try {
 229                                                 Thread.sleep(1);
 230                                         } catch (InterruptedException e) {
 231                                         }
 232                                 }
 233
 234                                 if (img == null) {
 235                                         setText("Error: cannot render image.");
 236                                 } else {
 237                                         setImage(img);
 238                                 }
 239                         }
 240                 }).start();
 241         }
 242
 243         /**
 244          * Actually set the image in the UI.
 245          * <p>
 246          * Do <b>NOT</b> use this method from the UI thread.
 247          *
 248          * @param img
 249          *            the image to set
 250          */
 251         private void setImage(Image img) {
 252                 try {
 253                         int scrollWidth = scroll.getWidth()
 254                                         - scroll.getVerticalScrollBar().getWidth();
 255
 256                         BufferedImage buffImg = ImageUtilsAwt.fromImage(img);
 257
 258                         int iw = buffImg.getWidth();
 259                         int ih = buffImg.getHeight();
 260                         double ratio = ((double) ih) / iw;
 261
 262                         int w = scrollWidth;
 263                         int h = (int) (ratio * scrollWidth);
 264
 265                         BufferedImage resizedImage = new BufferedImage(w, h,
 266                                         BufferedImage.TYPE_4BYTE_ABGR);
 267
 268                         Graphics2D g = resizedImage.createGraphics();
 269                         try {
 270                                 g.drawImage(buffImg, 0, 0, w, h, null);
 271                         } finally {
 272                                 g.dispose();
 273                         }
 274
 275                         final Icon icon = new ImageIcon(resizedImage);
 276                         EventQueue.invokeLater(new Runnable() {
 277                                 @Override
 278                                 public void run() {
 279                                         image.setIcon(icon);
 280                                         scroll.setViewportView(image);
 281                                 }
 282                         });
 283                 } catch (Exception e) {
 284                         Instance.getTraceHandler().error(
 285                                         new Exception("Failed to load image into label", e));
 286                         EventQueue.invokeLater(new Runnable() {
 287                                 @Override
 288                                 public void run() {
 289                                         text.setText("Error: cannot load image.");
 290                                 }
 291                         });
 292                 }
 293         }
 294 }