com.jgraph.pad.graph
Class JGraphpadMarqueeHandler

java.lang.Object
  org.jgraph.graph.BasicMarqueeHandler
      com.jgraph.pad.graph.JGraphpadMarqueeHandler

public class JGraphpadMarqueeHandler

extends org.jgraph.graph.BasicMarqueeHandler

Marquee handler that implements popup menus and folding (by icon). This implements the event processing order for all graphs in the following way:

• If a folding icon is under the mouse pointer all processing is blocked until the mouse is released. On release, the group's collapsed state is toggled and the group is selected.
• If the right mouse button is used without holding down the shift key then a popup menu is displayed. If there is a cell under the mouse pointer which is not selected, then the cell is selected on mouse down. If the mouse is right-clicked on the background then the selection is cleared before the popup is displayed.

Field Summary

protected JGraphEditor	editor References the enclosing editor.
protected org.jgraph.graph.CellView	groupView Holds the group view if the interaction started on a folding icon.
static String	NODENAME_CELLPOPUPMENU Defines the nodename used to configure the cellpopupmenu.
static String	NODENAME_GRAPHPOPUPMENU Defines the nodename used to configure the graphpopupmenu.

Fields inherited from class org.jgraph.graph.BasicMarqueeHandler

currentPoint, marqueeBounds, previousCursor, startPoint

Constructor Summary

JGraphpadMarqueeHandler(JGraphEditor editor)
Constructs a new editor using the specified editor to configure and create popup menus.

Method Summary

protected org.jgraph.graph.CellView	getGroupByFoldingHandle(org.jgraph.JGraph graph, Point2D pt) Returns the cell view at the specified location if the location is over the cell view's folding icon.
protected Node	getPopupMenuConfiguration(MouseEvent event) Returns the popup menu configuration for the specified event.
boolean	isForceMarqueeEvent(MouseEvent event) Extends the parent's implementation to implement the event processing order.
void	mousePressed(MouseEvent event) Overrides the parent's implementation to either block processing if a group view is scheduled to be collapsed/expanded or immediately select the cell under the mouse pointer if it is not selected.
void	mouseReleased(MouseEvent e) Overrides the parent's implementation to display a popup menu using getPopupMenuConfiguration(MouseEvent) to obtain the configuration or toggle the collapsed state of groupView and select the respective cell.

Methods inherited from class org.jgraph.graph.BasicMarqueeHandler

getCurrentPoint, getGraphForEvent, getMarqueeBounds, getPreviousCursor, getStartPoint, handleMarqueeEvent, isMarqueeTriggerEvent, mouseDragged, mouseMoved, overlay, paint, processMouseDraggedEvent, setCurrentPoint, setMarqueeBounds, setPreviousCursor, setStartPoint

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

NODENAME_GRAPHPOPUPMENU

public static String NODENAME_GRAPHPOPUPMENU

Defines the nodename used to configure the graphpopupmenu.

NODENAME_CELLPOPUPMENU

public static String NODENAME_CELLPOPUPMENU

Defines the nodename used to configure the cellpopupmenu.

editor

protected JGraphEditor editor

References the enclosing editor. The editor is used to configure and create the popup menus.

groupView

protected org.jgraph.graph.CellView groupView

Holds the group view if the interaction started on a folding icon.

Constructor Detail

JGraphpadMarqueeHandler

public JGraphpadMarqueeHandler(JGraphEditor editor)

Constructs a new editor using the specified editor to configure and create popup menus.

Parameters:

editor - The enclosing editor.

Method Detail

isForceMarqueeEvent

public boolean isForceMarqueeEvent(MouseEvent event)

Extends the parent's implementation to implement the event processing order.

Parameters:

event - The object that describes the event.

mousePressed

public void mousePressed(MouseEvent event)

Overrides the parent's implementation to either block processing if a group view is scheduled to be collapsed/expanded or immediately select the cell under the mouse pointer if it is not selected.

Parameters:

event - The object that describes the event.

mouseReleased

public void mouseReleased(MouseEvent e)

Overrides the parent's implementation to display a popup menu using getPopupMenuConfiguration(MouseEvent) to obtain the configuration or toggle the collapsed state of groupView and select the respective cell. The state of the handler is reset after event processing.

Parameters:

e - The object that describes the event.

getPopupMenuConfiguration

protected Node getPopupMenuConfiguration(MouseEvent event)

Returns the popup menu configuration for the specified event. This implementation looks at the event source and returns a NODENAME_CELLPOPUPMENU or NODENAME_GRAPHPOPUPMENU configuration based on the selection state of the graph.

Parameters:

event - The event that triggered the display of the popup menu.

Returns:

Returns the popup menu configuration for event.

getGroupByFoldingHandle

protected org.jgraph.graph.CellView getGroupByFoldingHandle(org.jgraph.JGraph graph,
                                                            Point2D pt)

Returns the cell view at the specified location if the location is over the cell view's folding icon.

Parameters:

graph - The graph to get the cell views from.

pt - The location to check for a folding icon.

Returns:

Returns the topmost cell view who's folding icon is under the mouse pointer.