package be.nikiroo.fanfix.reader.ui; import java.awt.BorderLayout; import java.awt.EventQueue; import java.awt.Graphics2D; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.image.BufferedImage; import javax.swing.Icon; import javax.swing.ImageIcon; import javax.swing.JButton; import javax.swing.JEditorPane; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JProgressBar; import javax.swing.JScrollPane; import javax.swing.SwingConstants; import be.nikiroo.fanfix.Instance; import be.nikiroo.fanfix.bundles.StringIdGui; import be.nikiroo.fanfix.data.Chapter; import be.nikiroo.fanfix.data.Story; import be.nikiroo.utils.Image; import be.nikiroo.utils.ui.ImageUtilsAwt; /** * A {@link JPanel} that will show a {@link Story} chapter on screen. * * @author niki */ public class GuiReaderViewerPanel extends JPanel { private static final long serialVersionUID = 1L; private boolean imageDocument; private Chapter chap; private JScrollPane scroll; private GuiReaderViewerTextOutput htmlOutput; // text only: private JEditorPane text; // image only: private JLabel image; private JProgressBar imageProgress; private int currentImage; private JButton left; private JButton right; /** * Create a new viewer. * * @param story * the {@link Story} to work on. */ public GuiReaderViewerPanel(Story story) { super(new BorderLayout()); this.imageDocument = story.getMeta().isImageDocument(); this.text = new JEditorPane("text/html", ""); text.setEditable(false); text.setAlignmentY(TOP_ALIGNMENT); htmlOutput = new GuiReaderViewerTextOutput(); image = new JLabel(); image.setHorizontalAlignment(SwingConstants.CENTER); scroll = new JScrollPane(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED, JScrollPane.HORIZONTAL_SCROLLBAR_NEVER); scroll.getVerticalScrollBar().setUnitIncrement(16); if (!imageDocument) { add(scroll, BorderLayout.CENTER); } else { imageProgress = new JProgressBar(); imageProgress.setStringPainted(true); add(imageProgress, BorderLayout.SOUTH); JPanel main = new JPanel(new BorderLayout()); main.add(scroll, BorderLayout.CENTER); left = new JButton("    <    "); left.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { setImage(--currentImage); } }); main.add(left, BorderLayout.WEST); right = new JButton("    >    "); right.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { setImage(++currentImage); } }); main.add(right, BorderLayout.EAST); add(main, BorderLayout.CENTER); main.invalidate(); } setChapter(story.getMeta().getResume()); } /** * Load the given chapter. *

* Will always be text for a non-image document. *

* Will be an image and left/right controls for an image-document, except * for chapter 0 which will be text (chapter 0 = resume). * * @param chap * the chapter to load */ public void setChapter(Chapter chap) { this.chap = chap; if (!imageDocument) { setText(chap); } else { left.setVisible(chap.getNumber() > 0); right.setVisible(chap.getNumber() > 0); imageProgress.setVisible(chap.getNumber() > 0); imageProgress.setMinimum(0); imageProgress.setMaximum(chap.getParagraphs().size() - 1); if (chap.getNumber() == 0) { setText(chap); } else { setImage(0); } } } /** * Will set and display the current chapter text. * * @param chap * the chapter to display */ private void setText(final Chapter chap) { new Thread(new Runnable() { @Override public void run() { final String content = htmlOutput.convert(chap); // Wait until size computations are correct while (!scroll.isValid()) { try { Thread.sleep(1); } catch (InterruptedException e) { } } setText(content); } }).start(); } /** * Actually set the text in the UI. *

* Do NOT use this method from the UI thread. * * @param content * the text */ private void setText(final String content) { EventQueue.invokeLater(new Runnable() { @Override public void run() { text.setText(content); text.setCaretPosition(0); scroll.setViewportView(text); } }); } /** * Will set and display the current image, take care about the progression * and update the left and right cursors' enabled property. * * @param i * the image index to load */ private void setImage(int i) { left.setEnabled(i > 0); right.setEnabled(i + 1 < chap.getParagraphs().size()); if (i < 0 || i >= chap.getParagraphs().size()) { return; } imageProgress.setValue(i); imageProgress.setString(GuiReader.trans(StringIdGui.IMAGE_PROGRESSION, i + 1, chap.getParagraphs().size())); currentImage = i; final Image img = chap.getParagraphs().get(i).getContentImage(); // prepare the viewport to get the right sizes later on image.setIcon(null); scroll.setViewportView(image); new Thread(new Runnable() { @Override public void run() { // Wait until size computations are correct while (!scroll.isValid()) { try { Thread.sleep(1); } catch (InterruptedException e) { } } if (img == null) { setText("Error: cannot render image."); } else { setImage(img); } } }).start(); } /** * Actually set the image in the UI. *

* Do NOT use this method from the UI thread. * * @param img * the image to set */ private void setImage(Image img) { try { int scrollWidth = scroll.getWidth() - scroll.getVerticalScrollBar().getWidth(); BufferedImage buffImg = ImageUtilsAwt.fromImage(img); int iw = buffImg.getWidth(); int ih = buffImg.getHeight(); double ratio = ((double) ih) / iw; int w = scrollWidth; int h = (int) (ratio * scrollWidth); BufferedImage resizedImage = new BufferedImage(w, h, BufferedImage.TYPE_4BYTE_ABGR); Graphics2D g = resizedImage.createGraphics(); try { g.drawImage(buffImg, 0, 0, w, h, null); } finally { g.dispose(); } final Icon icon = new ImageIcon(resizedImage); EventQueue.invokeLater(new Runnable() { @Override public void run() { image.setIcon(icon); scroll.setViewportView(image); } }); } catch (Exception e) { Instance.getTraceHandler().error( new Exception("Failed to load image into label", e)); EventQueue.invokeLater(new Runnable() { @Override public void run() { text.setText("Error: cannot load image."); } }); } } }