Package org.jgraph.graph

Class BasicMarqueeHandler

java.lang.Object
org.jgraph.graph.BasicMarqueeHandler
public class BasicMarqueeHandler extends Object
A simple implementation of a marquee handler for JGraph.

  • Field Details

    • previousCursor

      protected transient Cursor previousCursor

    • marqueeBounds

      protected Rectangle2D marqueeBounds

    • startPoint

      protected Point2D startPoint

    • currentPoint

      protected Point2D currentPoint

  • Constructor Details

    • BasicMarqueeHandler

      public BasicMarqueeHandler()

  • Method Details

    • isForceMarqueeEvent

      public boolean isForceMarqueeEvent(MouseEvent event)

    • mouseReleased

      public void mouseReleased(MouseEvent e)
      Stops the current marquee selection.

    • handleMarqueeEvent

      public void handleMarqueeEvent(MouseEvent e, JGraph graph, Rectangle2D bounds)
      Hook for subclassers. Current implementation checks if graph selection is enabled. This is called from mouseReleased to execute the marquee selection.

    • mouseDragged

      public void mouseDragged(MouseEvent e)
      Includes the specified startPoint in the marquee selection. Calls overlay.

    • processMouseDraggedEvent

      protected void processMouseDraggedEvent(MouseEvent e)
      Called from mouse dragged to update the marquee state during a repaint.

    • paint

      public void paint(JGraph graph, Graphics g)
      Called after the component was repainted (after autoscroll). This is used to indicate that the graphics is no more dirty.

    • overlay

      public void overlay(JGraph graph, Graphics g, boolean clear)
      Draw the current state of the handler. This is called twice by the overlay method and also by the paint method. The caller's intention is that the overlay method draws exactly the current state of the handler so that it may be used for XOR paint. The drag method calls overlay, changes the state, and calls overlay again to use this. However, since it is not always possible to clear the screen with an exact repaint the caller passes a flag to indicate if the graphics object should be cleared with this call (eg. if a subsequent call follows).
      Parameters:
      g -

    • mousePressed

      public void mousePressed(MouseEvent e)
      Start the marquee at the specified startPoint. This invokes expandMarqueeToPoint to initialize marquee selection.

    • isMarqueeTriggerEvent

      public boolean isMarqueeTriggerEvent(MouseEvent e, JGraph graph)
      Hook for subclassers. Current implementation checks if graph selection is enabled. This is called from mousePressed before initiating the marquee selection.

    • mouseMoved

      public void mouseMoved(MouseEvent e)
      Empty.

    • getCurrentPoint

      public Point2D getCurrentPoint()
      Returns the currentPoint.
      Returns:
      Point

    • getMarqueeBounds

      public Rectangle2D getMarqueeBounds()
      Returns the marqueeBounds.
      Returns:
      Rectangle

    • getPreviousCursor

      public Cursor getPreviousCursor()
      Returns the previousCursor.
      Returns:
      Cursor

    • getStartPoint

      public Point2D getStartPoint()
      Returns the startPoint.
      Returns:
      Point

    • setCurrentPoint

      public void setCurrentPoint(Point2D currentPoint)
      Sets the currentPoint.
      Parameters:
      currentPoint - The currentPoint to set

    • setMarqueeBounds

      public void setMarqueeBounds(Rectangle2D marqueeBounds)
      Sets the marqueeBounds.
      Parameters:
      marqueeBounds - The marqueeBounds to set

    • setPreviousCursor

      public void setPreviousCursor(Cursor previousCursor)
      Sets the previousCursor.
      Parameters:
      previousCursor - The previousCursor to set

    • setStartPoint

      public void setStartPoint(Point2D startPoint)
      Sets the startPoint.
      Parameters:
      startPoint - The startPoint to set

    • getGraphForEvent

      public static JGraph getGraphForEvent(MouseEvent event)
      Returns:
      Returns the source of the event as a graph.