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Showing posts with label JTextArea. Show all posts
Showing posts with label JTextArea. Show all posts

2017/12/26

aterai

Automatically extend its height when JTextArea gains focus

Code

textArea.addFocusListener(new FocusAdapter() {
  @Override public void focusLost(FocusEvent e) {
    String text = textArea.getText();
    label.setText(text.isEmpty() ? " " : text);
    cardLayout.show(cp, "TextField");
  }
});
label.addFocusListener(new FocusAdapter() {
  @Override public void focusGained(FocusEvent e) {
    cardLayout.show(cp, "TextArea");
    textArea.requestFocusInWindow();
  }
});

References

2017/06/29

aterai

Automatically adjust the height of JTable's row

Code

class TextAreaCellRenderer extends JTextArea implements TableCellRenderer {
  private final List< List< Integer > > rowAndCellHeightList = new ArrayList<>();

  @Override public void updateUI() {
    super.updateUI();
    setLineWrap(true);
    setBorder(BorderFactory.createEmptyBorder(2, 2, 2, 2));
    setName("Table.cellRenderer");
  }
  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected, boolean hasFocus,
      int row, int column) {
    setFont(table.getFont());
    setText(Objects.toString(value, ""));
    adjustRowHeight(table, row, column);
    return this;
  }

  /**
   * Calculate the new preferred height for a given row, and sets the height on the table.
   * http://blog.botunge.dk/post/2009/10/09/JTable-multiline-cell-renderer.aspx
   */
  private void adjustRowHeight(JTable table, int row, int column) {
    // The trick to get this to work properly is to set the width of the column to the
    // textarea. The reason for this is that getPreferredSize(), without a width tries
    // to place all the text in one line. By setting the size with the with of the column,
    // getPreferredSize() returnes the proper height which the row should have in
    // order to make room for the text.
    // int cWidth = table.getTableHeader().getColumnModel().getColumn(column).getWidth();
    // int cWidth = table.getCellRect(row, column, false).width; //Ignore IntercellSpacing
    // setSize(new Dimension(cWidth, 1000));

    setBounds(table.getCellRect(row, column, false));
    // doLayout();

    int preferredHeight = getPreferredSize().height;
    while (rowAndCellHeightList.size() <= row) {
      rowAndCellHeightList.add(new ArrayList<>(column));
    }
    List cellHeightList = rowAndCellHeightList.get(row);
    while (cellHeightList.size() <= column) {
      cellHeightList.add(0);
    }
    cellHeightList.set(column, preferredHeight);
    int max = cellHeightList.stream().max(Integer::compare).get();
    if (table.getRowHeight(row) != max) {
      table.setRowHeight(row, max);
    }
  }
  // ...

References

2017/03/30

aterai

Make a condensed Font and use it with JTextArea

Code

Font font = new Font(Font.MONOSPACED, Font.PLAIN, 18).deriveFont(
    AffineTransform.getScaleInstance(.9, 1d));
textArea.setFont(font);

References

2015/12/28

aterai

Copy on select for JTextArea

Code

class CopyOnSelectListener extends MouseAdapter implements CaretListener {
  private boolean dragActive;
  private int dot;
  private int mark;
  @Override public final void caretUpdate(CaretEvent e) {
    if (!dragActive) {
      fire(e.getSource());
    }
  }
  @Override public final void mousePressed(MouseEvent e) {
    dragActive = true;
  }
  @Override public final void mouseReleased(MouseEvent e) {
    dragActive = false;
    fire(e.getSource());
  }
  private void fire(Object c) {
    if (c instanceof JTextComponent) {
      JTextComponent tc = (JTextComponent) c;
      Caret caret = tc.getCaret();
      int d = caret.getDot();
      int m = caret.getMark();
      if (d != m && (dot != d || mark != m)) {
        String str = tc.getSelectedText();
        if (Objects.nonNull(str)) {
          //StringSelection data = new StringSelection(str);
          //Toolkit tk = Toolkit.getDefaultToolkit();
          //tk.getSystemClipboard().setContents(data, data);
          tc.copy();
        }
      }
      dot = d;
      mark = m;
    }
  }
}

References

2015/02/25

aterai

Logging into the JTextArea

Code

Logger logger = Logger.getLogger(TextAreaLogger.TEST.getClass().getName());
logger.setUseParentHandlers(false);
OutputStream os = new TextAreaOutputStream(new JTextArea());
logger.addHandler(new TextAreaHandler(os));
logger.info("test, TEST");

//...
class TextAreaHandler extends StreamHandler {
  private void configure() {
    setFormatter(new SimpleFormatter());
    try {
      setEncoding("UTF-8");
    } catch (IOException ex) {
      try {
        setEncoding(null);
      } catch (IOException ex2) {
        // doing a setEncoding with null should always work.
        // assert false;
        ex2.printStackTrace();
      }
    }
  }
  public TextAreaHandler(OutputStream os) {
    super();
    configure();
    setOutputStream(os);
  }
  //@see java/util/logging/ConsoleHandler.java
  @Override public void publish(LogRecord record) {
    super.publish(record);
    flush();
  }
  @Override public void close() {
    flush();
  }
}

References

2014/07/23

aterai

Highlight all search pattern matches in the JTextArea

Code

private Pattern getPattern() {
  String text = field.getText();
  if (text == null || text.isEmpty()) {
    return null;
  }
  try {
    String cw = checkWord.isSelected() ? "\\b" : "";
    String pattern = String.format("%s%s%s", cw, text, cw);
    int flags = checkCase.isSelected()
      ? 0
      : Pattern.CASE_INSENSITIVE | Pattern.UNICODE_CASE;
    return Pattern.compile(pattern, flags);
  } catch (PatternSyntaxException ex) {
    field.setBackground(WARNING_COLOR);
    return null;
  }
}

private void changeHighlight() {
  field.setBackground(Color.WHITE);
  Highlighter highlighter = textArea.getHighlighter();
  highlighter.removeAllHighlights();
  Document doc = textArea.getDocument();
  try {
    Pattern pattern = getPattern();
    if (pattern != null) {
      Matcher matcher = pattern.matcher(doc.getText(0, doc.getLength()));
      int pos = 0;
      while (matcher.find(pos)) {
        int start = matcher.start();
        int end   = matcher.end();
        highlighter.addHighlight(start, end, highlightPainter);
        pos = end;
      }
    }
    JLabel label = layerUI.hint;
    Highlighter.Highlight[] array = highlighter.getHighlights();
    int hits = array.length;
    if (hits == 0) {
      current = -1;
      label.setOpaque(true);
    } else {
      current = (current + hits) % hits;
      label.setOpaque(false);
      Highlighter.Highlight hh = highlighter.getHighlights()[current];
      highlighter.removeHighlight(hh);
      highlighter.addHighlight(
          hh.getStartOffset(), hh.getEndOffset(), currentPainter);
      scrollToCenter(textArea, hh.getStartOffset());
    }
    label.setText(String.format("%02d / %02d%n", current + 1, hits));
  } catch (BadLocationException e) {
    e.printStackTrace();
  }
  field.repaint();
}

References

2013/05/29

aterai

Column spanning TableCellRenderer

Code

class ColumnSpanningCellRenderer extends JPanel implements TableCellRenderer {
  private static final int TARGET_COLIDX = 0;
  private final JTextArea textArea = new JTextArea(2, 999999);
  private final JLabel label = new JLabel();
  private final JLabel iconLabel = new JLabel();
  private final JScrollPane scroll = new JScrollPane(textArea);

  protected ColumnSpanningCellRenderer() {
    super(new BorderLayout());

    scroll.setVerticalScrollBarPolicy(ScrollPaneConstants.VERTICAL_SCROLLBAR_NEVER);
    scroll.setHorizontalScrollBarPolicy(ScrollPaneConstants.HORIZONTAL_SCROLLBAR_NEVER);
    scroll.setBorder(BorderFactory.createEmptyBorder());
    scroll.setViewportBorder(BorderFactory.createEmptyBorder());
    scroll.setOpaque(false);
    scroll.getViewport().setOpaque(false);

    textArea.setBorder(BorderFactory.createEmptyBorder());
    textArea.setMargin(new Insets(0, 0, 0, 0));
    textArea.setForeground(Color.RED);
    textArea.setEditable(false);
    textArea.setFocusable(false);
    textArea.setOpaque(false);

    iconLabel.setBorder(BorderFactory.createEmptyBorder(0, 4, 0, 4));
    iconLabel.setOpaque(false);

    Border b1 = BorderFactory.createEmptyBorder(2, 2, 2, 2);
    Border b2 = BorderFactory.createMatteBorder(0, 0, 1, 1, Color.GRAY);
    label.setBorder(BorderFactory.createCompoundBorder(b2, b1));

    setBackground(textArea.getBackground());
    setOpaque(true);
    add(label, BorderLayout.NORTH);
    add(scroll);
  }
  @Override public Component getTableCellRendererComponent(
      JTable table, Object value, boolean isSelected,
      boolean hasFocus, int row, int column) {
    OptionPaneDescription d;
    if (value instanceof OptionPaneDescription) {
      d = (OptionPaneDescription) value;
      add(iconLabel, BorderLayout.WEST);
    } else {
      String title = Objects.toString(value, "");
      int mrow = table.convertRowIndexToModel(row);
      Object o = table.getModel().getValueAt(mrow, 0);
      if (o instanceof OptionPaneDescription) {
        OptionPaneDescription t = (OptionPaneDescription) o;
        d = new OptionPaneDescription(title, t.icon, t.text);
      } else {
        d = new OptionPaneDescription(title, null, "");
      }
      remove(iconLabel);
    }
    label.setText(d.title);
    textArea.setText(d.text);
    iconLabel.setIcon(d.icon);

    Rectangle cr = table.getCellRect(row, column, false);
    if (column != TARGET_COLIDX) {
      cr.x -= iconLabel.getPreferredSize().width;
    }
    scroll.getViewport().setViewPosition(cr.getLocation());

    if (isSelected) {
      setBackground(Color.ORANGE);
    } else {
      setBackground(Color.WHITE);
    }
    return this;
  }
}

class OptionPaneDescription {
  public final String title;
  public final Icon icon;
  public final String text;
  protected OptionPaneDescription(String title, Icon icon, String text) {
    this.title = title;
    this.icon  = icon;
    this.text  = text;
  }
}

References

2013/01/28

aterai

JScrollBar search highlighter

Code

Override WindowsScrollBarUI#paintTrack(...)

scrollbar.setUI(new WindowsScrollBarUI() {
  @Override protected void paintTrack(
      Graphics g, JComponent c, Rectangle trackBounds) {
    super.paintTrack(g, c, trackBounds);

    Rectangle rect = textArea.getBounds();
    double sy = trackBounds.getHeight() / rect.getHeight();
    AffineTransform at = AffineTransform.getScaleInstance(1.0, sy);
    Highlighter highlighter = textArea.getHighlighter();
    g.setColor(Color.YELLOW);
    try{
      for(Highlighter.Highlight hh: highlighter.getHighlights()) {
        Rectangle r = textArea.modelToView(hh.getStartOffset());
        Rectangle s = at.createTransformedShape(r).getBounds();
        int h = 2; //Math.max(2, s.height-2);
        g.fillRect(trackBounds.x, trackBounds.y+s.y, trackBounds.width, h);
      }
    }catch(BadLocationException e) {
      e.printStackTrace();
    }
  }
});

JLabel + Icon + RowHeader

final JScrollPane scroll = new JScrollPane(textArea);
JLabel label = new JLabel(new Icon() {
  private final Color THUMB_COLOR = new Color(0,0,255,50);
  private final Rectangle thumbRect = new Rectangle();
  private final JTextComponent textArea;
  private final JScrollBar scrollbar;
  public HighlightIcon(JTextComponent textArea, JScrollBar scrollbar) {
    this.textArea  = textArea;
    this.scrollbar = scrollbar;
  }
  @Override public void paintIcon(Component c, Graphics g, int x, int y) {
    //Rectangle rect   = textArea.getBounds();
    //Dimension sbSize = scrollbar.getSize();
    //Insets sbInsets  = scrollbar.getInsets();
    //double sy = (sbSize.height-sbInsets.top-sbInsets.bottom)/rect.getHeight();
    int itop = scrollbar.getInsets().top;
    BoundedRangeModel range = scrollbar.getModel();
    double sy = range.getExtent()/(double)(range.getMaximum()-range.getMinimum());
    AffineTransform at = AffineTransform.getScaleInstance(1.0, sy);
    Highlighter highlighter = textArea.getHighlighter();

    //paint Highlight
    g.setColor(Color.RED);
    try{
      for(Highlighter.Highlight hh: highlighter.getHighlights()) {
        Rectangle r = textArea.modelToView(hh.getStartOffset());
        Rectangle s = at.createTransformedShape(r).getBounds();
        int h = 2; //Math.max(2, s.height-2);
        g.fillRect(x, y+itop+s.y, getIconWidth(), h);
      }
    }catch(BadLocationException e) {
      e.printStackTrace();
    }

    //paint Thumb
    if(scrollbar.isVisible()) {
      //JViewport vport = Objects.requireNonNull(
      //  (JViewport)SwingUtilities.getAncestorOfClass(JViewport.class, textArea));
      //Rectangle thumbRect = vport.getBounds();
      thumbRect.height = range.getExtent();
      thumbRect.y = range.getValue(); //vport.getViewPosition().y;
      g.setColor(THUMB_COLOR);
      Rectangle s = at.createTransformedShape(thumbRect).getBounds();
      g.fillRect(x, y+itop+s.y, getIconWidth(), s.height);
    }
  }
  @Override public int getIconWidth() {
    return 8;
  }
  @Override public int getIconHeight() {
    JViewport vport = Objects.requireNonNull(
        (JViewport)SwingUtilities.getAncestorOfClass(JViewport.class, textArea));
    return vport.getHeight();
  }
});

scroll.setVerticalScrollBar(scrollbar);
/*
// Fixed Versions: 7 (b134)
scroll.setRowHeaderView(label);
/*/
// [JDK-6826074] JScrollPane does not revalidate the component hierarchy after scrolling - Java Bug System
// https://bugs.openjdk.java.net/browse/JDK-6826074
// Affected Versions: 6u12,6u16,7
JViewport vp = new JViewport() {
  @Override public void setViewPosition(Point p) {
    super.setViewPosition(p);
    revalidate();
  }
};
vp.setView(label);
scroll.setRowHeader(vp);

MatteBorder + Icon + RowHeader

JScrollBar scrollBar = new JScrollBar(JScrollBar.VERTICAL) {
  @Override public Dimension getPreferredSize() {
    Dimension d = super.getPreferredSize();
    d.width += getInsets().left;
    return d;
  }
  @Override public void updateUI() {
    super.updateUI();
    setBorder(BorderFactory.createMatteBorder(0, 4, 0, 0, new Icon() {
      @Override public void paintIcon(Component c, Graphics g, int x, int y) {
        //...
      }
      @Override public int getIconWidth() {
        return getInsets().left;
      }
      @Override public int getIconHeight() {
        return getHeight();
      }
    }));
  }
};
scroll.setVerticalScrollBar(scrollBar);

References

2011/07/29

aterai

Pause and Resume SwingWorker

Code

class RunAction extends AbstractAction{
  public RunAction() {
    super("run");
  }
  @Override public void actionPerformed(ActionEvent evt) {
    final JProgressBar bar1 = new JProgressBar(0, 100);
    final JProgressBar bar2 = new JProgressBar(0, 100);
    runButton.setEnabled(false);
    canButton.setEnabled(true);
    pauseButton.setEnabled(true);
    statusPanel.removeAll();
    statusPanel.add(bar1, BorderLayout.NORTH);
    statusPanel.add(bar2, BorderLayout.SOUTH);
    statusPanel.revalidate();
    worker = new SwingWorker < String, Progress > () {
      @Override public String doInBackground() {
        int current = 0;
        int lengthOfTask = 12; //filelist.size();
        publish(new Progress(Component.LOG, "Length Of Task: " + lengthOfTask));
        publish(new Progress(Component.LOG, "\n---------------------------\n"));
        while(current < lengthOfTask && !isCancelled()) {
          publish(new Progress(Component.LOG, "*"));
          if(!bar1.isDisplayable()) {
            return "Disposed";
          }
          try{
            convertFileToSomething();
          }catch(InterruptedException ie) {
            return "Interrupted";
          }
          publish(new Progress(Component.TOTAL, 100 * current / lengthOfTask));
          current++;
        }
        publish(new Progress(Component.LOG, "\n"));
        return "Done";
      }
      private final Random r = new Random();
      private void convertFileToSomething() throws InterruptedException{
        boolean flag = false;
        int current = 0;
        int lengthOfTask = 10+r.nextInt(50);
        while(current <= lengthOfTask && !isCancelled()) {
          if(isPaused) {
            try{
              Thread.sleep(500);
            }catch(InterruptedException ie) {
              return;
            }
            publish(new Progress(Component.PAUSE, flag));
            flag = !flag;
            continue;
          }
          int iv = 100 * current / lengthOfTask;
          Thread.sleep(20); // dummy
          publish(new Progress(Component.FILE, iv+1));
          current++;
        }
      }
      @Override protected void process(java.util.List < Progress > chunks) {
        for(Progress s: chunks) {
          switch(s.component) {
            case TOTAL: bar1.setValue((Integer)s.value); break;
            case FILE:  bar2.setValue((Integer)s.value); break;
            case LOG:   area.append((String)s.value); break;
            case PAUSE: {
              if((Boolean)s.value) {
                area.append("*");
              }else{
                try{
                  javax.swing.text.Document doc = area.getDocument();
                  doc.remove(area.getDocument().getLength()-1, 1);
                }catch(Exception ex) {
                    ex.printStackTrace();
                }
              }
              break;
            }
          }
        }
      }
      @Override public void done() {
        //...
      }
    };
    worker.execute();
  }
}
private boolean isPaused = false;
class PauseAction extends AbstractAction{
  public PauseAction() {
    super("pause");
  }
  @Override public void actionPerformed(ActionEvent evt) {
    isPaused = (worker!=null && !worker.isCancelled() && !isPaused);
    JButton b = (JButton)evt.getSource();
    b.setText(isPaused?"resume":"pause");
  }
}

References

2011/05/30

aterai

Translucent image caption using JTextArea, OverlayLayout, EaseInOut

Code

class ImageCaptionLabel extends JLabel implements HierarchyListener {
  private float alpha = 0.0f;
  private javax.swing.Timer animator;
  private int yy = 0;
  private JTextArea textArea = new JTextArea() {
    @Override protected void paintComponent(Graphics g) {
      Graphics2D g2 = (Graphics2D)g;
      g2.setPaint(getBackground());
      g2.fillRect(0, 0, getWidth(), getHeight());
      super.paintComponent(g);
    }
    //@Override public boolean contains(int x, int y) {
    //  return false;
    //}
  };
  public ImageCaptionLabel(String caption, Icon icon) {
    setIcon(icon);
    textArea.setFont(textArea.getFont().deriveFont(11f));
    textArea.setText(caption);
    textArea.setOpaque(false);
    textArea.setEditable(false);
    //textArea.setFocusable(false);
    textArea.setBackground(new Color(0,0,0,0));
    textArea.setForeground(Color.WHITE);
    textArea.setBorder(BorderFactory.createEmptyBorder(2,4,4,4));

    MouseAdapter ma = new MouseAdapter() {
      @Override public void mouseEntered(MouseEvent e) {
        dispatchMouseEvent(e);
      }
      @Override public void mouseExited(MouseEvent e) {
        dispatchMouseEvent(e);
      }
      private void dispatchMouseEvent(MouseEvent e) {
        Component src = e.getComponent();
        Component tgt = ImageCaptionLabel.this;
        tgt.dispatchEvent(SwingUtilities.convertMouseEvent(src, e, tgt));
      }
    };
    textArea.addMouseListener(ma);

    setBorder(BorderFactory.createCompoundBorder(
      BorderFactory.createLineBorder(new Color(222,222,222)),
      BorderFactory.createLineBorder(Color.WHITE, 4)));
    setLayout(new OverlayLayout(this) {
      @Override public void layoutContainer(Container parent) {
        //Insets insets = parent.getInsets();
        int ncomponents = parent.getComponentCount();
        if(ncomponents == 0) return;
        int width = parent.getWidth(); // - (insets.left + insets.right);
        int height = parent.getHeight(); // - (insets.left + insets.right);
        int x = 0; //insets.left; int y = insets.top;
        //for(int i=0;i < ncomponents;i++) {
        Component c = parent.getComponent(0); //= textArea;
        c.setBounds(x, height-yy, width, c.getPreferredSize().height);
        //}
      }
    });
    add(textArea);

    addMouseListener(new MouseAdapter() {
      private int delay = 4;
      private int count = 0;
      @Override public void mouseEntered(MouseEvent e) {
        if(animator!=null && animator.isRunning() ||
           yy==textArea.getPreferredSize().height) return;
        final double h = (double)textArea.getPreferredSize().height;
        animator = new javax.swing.Timer(delay, new ActionListener() {
          @Override public void actionPerformed(ActionEvent e) {
            double a = easeInOut(++count/h);
            yy = (int)(.5d+a*h);
            textArea.setBackground(new Color(0f,0f,0f,(float)(0.6*a)));
            if(yy >= textArea.getPreferredSize().height) {
              yy = textArea.getPreferredSize().height;
              animator.stop();
            }
            revalidate();
            repaint();
          }
        });
        animator.start();
      }
      @Override public void mouseExited(MouseEvent e) {
        if(animator!=null && animator.isRunning() ||
           contains(e.getPoint()) && yy==textArea.getPreferredSize().height) {
            return;
        }
        final double h = (double)textArea.getPreferredSize().height;
        animator = new javax.swing.Timer(delay, new ActionListener() {
          @Override public void actionPerformed(ActionEvent e) {
            double a = easeInOut(--count/h);
            yy = (int)(.5d+a*h);
            textArea.setBackground(new Color(0f,0f,0f,(float)(0.6*a)));
            if(yy <= 0) {
              yy = 0;
              animator.stop();
            }
            revalidate();
            repaint();
          }
        });
        animator.start();
      }
    });
    addHierarchyListener(this);
  }
  @Override public void hierarchyChanged(HierarchyEvent e) {
    if((e.getChangeFlags() & HierarchyEvent.DISPLAYABILITY_CHANGED)!=0 &&
       animator!=null && !isDisplayable()) {
      animator.stop();
    }
  }
  //http://www.anima-entertainment.de/math-easein-easeout-easeinout-and-bezier-curves
  //coders≫ Blog Archive ≫ Math: EaseIn EaseOut, EaseInOut and Bezier Curves
  public double easeInOut(double t) {
    if(t < 0.5d) {
      return 0.5d*Math.pow(t*2d, 3d);
    }else{
      return 0.5d*(Math.pow(t*2d-2d, 3d) + 2d);
    }
  }
}

References