Field Detail

• _mouseToViewDelta_x

  protected transient double _mouseToViewDelta_x

• _mouseToViewDelta_y

  protected transient double _mouseToViewDelta_y

• firstDrag

  protected transient boolean firstDrag

• views

  protected transient CellView[] views

• contextViews

  protected transient CellView[] contextViews

• portViews

  protected transient CellView[] portViews

• targetGroup

  protected transient CellView targetGroup

• ignoreTargetGroup

  protected transient CellView ignoreTargetGroup

• cachedBounds

  protected transient java.awt.geom.Rectangle2D cachedBounds

• initialLocation

  protected transient java.awt.geom.Point2D initialLocation

• handles

  protected transient CellHandle[] handles

• start

  protected transient java.awt.geom.Point2D start

• last

  protected transient java.awt.geom.Point2D last

• snapStart

  protected transient java.awt.geom.Point2D snapStart

• snapLast

  protected transient java.awt.geom.Point2D snapLast

• offgraphics

  protected transient java.awt.Graphics offgraphics

  Reference to graph off screen graphics

• isMoving

  protected boolean isMoving

  Indicates whether this handle is currently moving cells. Start may be non-null and isMoving false while the minimum movement has not been reached.

• isDragging

  protected boolean isDragging

  Indicates whether this handle has started drag and drop. Note: isDragging => isMoving.

• activeHandle

  protected transient CellHandle activeHandle

  The handle that consumed the last mousePressedEvent. Initially null.

• context

  protected transient GraphContext context

• isContextVisible

  protected boolean isContextVisible

• blockPaint

  protected boolean blockPaint

• current

  protected java.awt.geom.Point2D current

• disconnect

  protected transient ConnectionSet disconnect

Constructor Detail

• RootHandle

  public RootHandle​(GraphContext ctx)

  Creates a root handle which contains handles for the given cells. The root handle and all its childs point to the specified JGraph instance. The root handle is responsible for dragging the selection.

Method Detail

• getInitialLocation

  protected java.awt.geom.Point2D getInitialLocation​(java.lang.Object[] cells)

  Returns the initial location, which is the top left corner of the selection, ignoring all connected endpoints of edges.

• getContext

  public GraphContext getContext()

• paint

  public void paint​(java.awt.Graphics g)

  Description copied from interface: CellHandle
  Paint the handle on the given graphics object once.

  Specified by:

  paint in interface CellHandle

  Parameters:

  g - the graphics object to paint the handle on

• overlay

  public void overlay​(java.awt.Graphics g)

  Description copied from interface: CellHandle
  Paint the handle on the given graphics object during mouse operations.

  Specified by:

  overlay in interface CellHandle

  Parameters:

  g - the graphics object to paint the handle on

• mouseMoved

  public void mouseMoved​(java.awt.event.MouseEvent event)

  Invoked when the mouse pointer has been moved on a component (with no buttons down).

  Specified by:

  mouseMoved in interface CellHandle

  Parameters:

  event - the mouse event to be processed

• mousePressed

  public void mousePressed​(java.awt.event.MouseEvent event)

  Description copied from interface: CellHandle
  Messaged when a mouse button is pressed.

  Specified by:

  mousePressed in interface CellHandle

  Parameters:

  event - the mouse event to be processed

• findViewForPoint

  protected CellView findViewForPoint​(java.awt.geom.Point2D pt)

  Hook for subclassers to return a different view for a mouse click at pt. For example, this can be used to return a leaf cell instead of a group.

• findUnselectedInnermostGroup

  protected CellView findUnselectedInnermostGroup​(double x,
                                                  double y)

  Used for move into group to find the target group.

• startDragging

  protected void startDragging​(java.awt.event.MouseEvent event)

• getFirstOpaqueParent

  public java.awt.Component getFirstOpaqueParent​(java.awt.Component component)

  Returns:

  Returns the parent graph scrollpane for the specified graph.

• initOffscreen

  protected void initOffscreen()

• mouseDragged

  public void mouseDragged​(java.awt.event.MouseEvent event)

  Process mouse dragged event.

  Specified by:

  mouseDragged in interface CellHandle

  Parameters:

  event - the drag event to be processed

• constrainDrag

  protected java.awt.geom.Point2D constrainDrag​(java.awt.event.MouseEvent event,
                                                double totDx,
                                                double totDy,
                                                double dx,
                                                double dy)

  Hook method to constrain a mouse drag

  Parameters:

  event -

  totDx -

  totDy -

  dx -

  dy -

  Returns:

  a point describing any position constraining applied

• mouseReleased

  public void mouseReleased​(java.awt.event.MouseEvent event)

  Description copied from interface: CellHandle
  Messaged when the drag operation has terminated with a drop.

  Specified by:

  mouseReleased in interface CellHandle

  Parameters:

  event - the drop event to be processed