Examples of org.jgraph.JGraph$GraphSelectionRedirector

org.jgraph.JGraph
Handles creating a new GraphSelectionEvent with the JGraph as the source and passing it off to all the listeners.
Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. A future release of Swing will provide support for long term persistence.

    /*
     * (non-Javadoc)
     */
    public void mouseDragged(MouseEvent e) {
      if (lastPoint != null) {
        JGraph graph = getCurrentGraph();
        JScrollPane scrollPane = getParentScrollPane(graph);
        if (scrollPane != null && currentGraph != null) {
          JViewport viewport = scrollPane.getViewport();
          Rectangle rect = viewport.getViewRect();
          double scale = backingGraph.getScale() / graph.getScale();
          double x = (e.getX() - lastPoint.getX()) / scale;
          double y = (e.getY() - lastPoint.getY()) / scale;
          lastPoint = e.getPoint();
          x = rect.getX() + ((x > 0) ? rect.getWidth() : 0) + x;
          y = rect.getY() + ((y > 0) ? rect.getHeight() : 0) + y;
          Point2D pt = new Point2D.Double(x, y);
          graph.scrollPointToVisible(pt);
          navigatorPane.repaint();
        }
      }
    }

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    try {
      if (e != null && marqueeBounds != null) {
        if (!(e.getSource() instanceof JGraph))
          throw new IllegalArgumentException("MarqueeHandler cannot "
              + "handle event from unknown source: " + e);
        JGraph graph = (JGraph) e.getSource();
        Rectangle2D bounds = graph
            .fromScreen((Rectangle2D) marqueeBounds.clone());
        handleMarqueeEvent(e, graph, bounds);
        graph.setCursor(previousCursor);
        Rectangle dirty = new Rectangle((int) marqueeBounds.getX(),
            (int) marqueeBounds.getY(), (int) marqueeBounds
                .getWidth() + 1, (int) marqueeBounds
                .getHeight() + 1);
        dirty.width++;
        dirty.height++;
        graph.repaint(dirty);
      }
    } finally {
      currentPoint = null;
      startPoint = null;
      marqueeBounds = null;

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    if (startPoint != null) {
      if (!(e.getSource() instanceof JGraph))
        throw new IllegalArgumentException(
            "MarqueeHandler cannot handle event from unknown source: "
                + e);
      JGraph graph = (JGraph) e.getSource();
      Graphics g = graph.getGraphics();


      // Xor the current display
      Color bg = graph.getBackground();
      Color fg = graph.getMarqueeColor();
      if (graph.isXorEnabled()) {
        g.setColor(fg);
        g.setXORMode(bg);
        overlay(graph, g, true);
      }
      Rectangle2D dirty = (Rectangle2D) marqueeBounds.clone();
      processMouseDraggedEvent(e);


      // Repaint
      if (graph.isXorEnabled()) {
        g.setColor(bg);
        g.setXORMode(fg);
        overlay(graph, g, false);
      } else {
        dirty.add(marqueeBounds);
        graph.repaint((int) dirty.getX()-1, (int) dirty.getY()-1,
            (int) dirty.getWidth()+2, (int) dirty.getHeight()+2);
      }
    }
  }

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        .getY(), 0, 0);
    if (!(e.getSource() instanceof JGraph))
      throw new IllegalArgumentException(
          "MarqueeHandler cannot handle event from unknown source: "
              + e);
    JGraph graph = (JGraph) e.getSource();
    if (isMarqueeTriggerEvent(e, graph)) {
      previousCursor = graph.getCursor();
      graph.setCursor(new Cursor(Cursor.CROSSHAIR_CURSOR));
    }
  }

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                g2.setStroke(new BasicStroke(lineWidth, c, j, 10.0f, lineDash, dashOffset));
                if (view.lineShape != null) g2.draw(view.lineShape);


        Object[] labels = GraphConstants.getExtraLabels(view
            .getAllAttributes());
        JGraph graph = (JGraph)this.graph.get();
        g.setFont(DefaultStaticConfiguration.DEFAULT_SMALLLABEL_FONT);
        if (labels != null) {
          for (int i = 0; i < labels.length; i++)
            paintLabel(g, graph.convertValueToString(labels[i]),
                getExtraLabelPosition(view, i),
                false || !simpleExtraLabels);
        }

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   * 
   * @param event
   *            The object that describes the event.
   */
  public void mousePressed(MouseEvent event) {
    JGraph graph = getGraphForEvent(event);
    startPoint = event.getPoint();
    previousCursor = graph.getCursor();
    // Workaround for the fact that you have to click the button
    // twice to get the panning cursor to appear properly, this
    // makes it appear after the first drag, which is a
    // slight improvement -- DCP 29/06/2006 (case 147).
    graph.setCursor(panningCursor);
    marqueeBounds = null;
    m_XDifference = event.getX();
    m_YDifference = event.getY();
    dx = 0;
    dy = 0;

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   * 
   * @param event
   *            The object that describes the event.
   */
  protected void processMouseDraggedEvent(MouseEvent event) {
    JGraph graph = getGraphForEvent(event);
    Component c = graph.getParent();


    // Added this test to move up the hierarchy and get the parent ViewPort,
    // if the graph is actually contained in a JPanel
    if (c instanceof JPanel) {
      c = c.getParent();
    }


    if (c instanceof JViewport) {
      JViewport jv = (JViewport) c;
      Point p = jv.getViewPosition();
      int newX = p.x - (event.getX() - m_XDifference);
      int newY = p.y - (event.getY() - m_YDifference);
      dx += (event.getX() - startPoint.getX());
      dy += (event.getY() - m_YDifference);


      int maxX = graph.getWidth() - jv.getWidth();
      int maxY = graph.getHeight() - jv.getHeight();
      if (newX < 0)
        newX = 0;
      if (newX > maxX)
        newX = maxX;
      if (newY < 0)

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   * 
   * @param event
   *            The object that describes the event.
   */
  public void mouseReleased(MouseEvent event) {
    JGraph graph = getGraphForEvent(event);
    if (previousCursor != null) {
      graph.setCursor(previousCursor);
    }
    event.consume();
  }

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   *            The current graph to set.
   */
  public void setCurrentGraph(JGraph sourceGraph) {
    if (sourceGraph == null || getParentGraph(sourceGraph) == null) {
      if (sourceGraph != null) {
        JGraph oldValue = getCurrentGraph();


        // Removes listeners from the previous graph
        if (oldValue != null && sourceGraph != oldValue) {
          oldValue.getModel().removeGraphModelListener(this);
          oldValue.getGraphLayoutCache()
              .removeGraphLayoutCacheListener(this);
          oldValue.removePropertyChangeListener(this);
          JScrollPane scrollPane = getParentScrollPane(oldValue);
          if (scrollPane != null) {
            scrollPane.removeComponentListener(componentListener);
            scrollPane.getVerticalScrollBar()
                .removeAdjustmentListener(this);

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   * Updates the scale of the backing graph.
   */
  protected void updateScale() {
    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        JGraph graph = getCurrentGraph();
        if (graph != null) {
          Dimension d = graph.getPreferredSize();
          Dimension b = graph.getBounds().getSize();
          d.width = Math.max(d.width, b.width);
          b.height = Math.max(d.height, b.height);
          double scale = graph.getScale();
          d.setSize(d.width * 1 / scale, d.height * 1 / scale);
          Dimension s = getScrollPane().getViewport().getSize();
          double sx = s.getWidth() / d.getWidth();
          double sy = s.getHeight() / d.getHeight();
          scale = Math.min(Math.min(sx, sy), getMaximumScale());

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