Package org.jgraph.plaf.basic

Class BasicGraphUI.RootHandle

java.lang.Object
org.jgraph.plaf.basic.BasicGraphUI.RootHandle
All Implemented Interfaces:
Serializable, CellHandle
Enclosing class:
BasicGraphUI
public class BasicGraphUI.RootHandle extends Object implements CellHandle, Serializable
See Also:

  • Field Details

    • _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 Rectangle2D cachedBounds

    • initialLocation

      protected transient Point2D initialLocation

    • handles

      protected transient CellHandle[] handles

    • start

      protected transient Point2D start

    • last

      protected transient Point2D last

    • snapStart

      protected transient Point2D snapStart

    • snapLast

      protected transient Point2D snapLast

    • offgraphics

      protected transient 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 Point2D current

    • disconnect

      protected transient ConnectionSet disconnect

  • Constructor Details

    • 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 Details

    • getInitialLocation

      protected Point2D getInitialLocation(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(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(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(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(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(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(MouseEvent event)

    • getFirstOpaqueParent

      public Component getFirstOpaqueParent(Component component)
      Returns:
      Returns the parent graph scrollpane for the specified graph.

    • initOffscreen

      protected void initOffscreen()

    • mouseDragged

      public void mouseDragged(MouseEvent event)
      Process mouse dragged event.
      Specified by:
      mouseDragged in interface CellHandle
      Parameters:
      event - the drag event to be processed

    • constrainDrag

      protected Point2D constrainDrag(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(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