edu.umd.cs.piccolox.swt

Class PSWTSelectionEventHandler

java.lang.Object

edu.umd.cs.piccolo.event.PBasicInputEventHandler

edu.umd.cs.piccolo.event.PDragSequenceEventHandler

edu.umd.cs.piccolox.event.PSelectionEventHandler

edu.umd.cs.piccolox.swt.PSWTSelectionEventHandler

All Implemented Interfaces:

PInputEventListener, EventListener

public class PSWTSelectionEventHandler
extends PSelectionEventHandler

Selection event handler modified to use SWT paths instead of normal paths.

Version:

1.0

Author:

Lance Good

Nested Class Summary

Nested classes/interfaces inherited from class edu.umd.cs.piccolox.event.PSelectionEventHandler

PSelectionEventHandler.BoundsFilter

Field Summary

Fields

Modifier and Type	Field and Description
(package private) Point2D	canvasPressPt
(package private) PSWTPath	marquee
(package private) PNode	marqueeParent
(package private) Point2D	pressPt

Fields inherited from class edu.umd.cs.piccolox.event.PSelectionEventHandler

SELECTION_CHANGED_NOTIFICATION

Constructor Summary

Constructors

Constructor and Description
PSWTSelectionEventHandler(PNode marqueeParent, List selectableParents) Creates a selection event handler.
PSWTSelectionEventHandler(PNode marqueeParent, PNode selectableParent) Creates a selection event handler.

Method Summary

Methods

Modifier and Type	Method and Description
void	decorateSelectedNode(PNode node) Modifies the provided node so that it is displayed as selected.
protected void	dragActivityStep(PInputEvent aEvent) This gets called continuously during the drag, and is used to animate the marquee.
protected void	endMarqueeSelection(PInputEvent e) Removes marquee and clears selection.
protected PBounds	getMarqueeBounds() Returns the bounds of the current selection marquee.
protected void	initializeMarquee(PInputEvent e) Creates an empty marquee child for use in displaying the marquee around the selection.
protected void	initializeSelection(PInputEvent pie) Starts a selection based on the provided event.
void	undecorateSelectedNode(PNode node) Undoes any modifications to the provided node so that it is not displayed as selected.
protected void	updateMarquee(PInputEvent pie) Updates the marquee rectangle as the result of a drag.

Methods inherited from class edu.umd.cs.piccolox.event.PSelectionEventHandler

addSelectableParent, computeMarqueeSelection, computeOptionMarqueeSelection, createNodeFilter, drag, dragStandardSelection, endDrag, endStandardSelection, getMarqueePaint, getMarqueePaintTransparency, getSelectableParents, getSelection, getSelectionReference, getSupportDeleteKey, init, isDeleteKeyActive, isMarqueeSelection, isOptionSelection, isSelectable, isSelected, keyPressed, removeSelectableParent, select, select, select, setDeleteKeyActive, setMarqueePaint, setMarqueePaintTransparency, setSelectableParent, setSelectableParents, startDrag, startMarqueeSelection, startOptionMarqueeSelection, startStandardOptionSelection, startStandardSelection, unselect, unselect, unselectAll

Methods inherited from class edu.umd.cs.piccolo.event.PDragSequenceEventHandler

dragActivityFinalStep, dragActivityFirstStep, getDragActivity, getMinDragStartDistance, getMousePressedCanvasPoint, isDragging, mouseDragged, mousePressed, mouseReleased, setIsDragging, setMinDragStartDistance, shouldStartDragInteraction, startDragActivity, stopDragActivity

Methods inherited from class edu.umd.cs.piccolo.event.PBasicInputEventHandler

acceptsEvent, getEventFilter, keyboardFocusGained, keyboardFocusLost, keyReleased, keyTyped, mouseClicked, mouseEntered, mouseExited, mouseMoved, mouseWheelRotated, mouseWheelRotatedByBlock, paramString, processEvent, setEventFilter

Methods inherited from class java.lang.Object

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

Field Detail

marquee

PSWTPath marquee

marqueeParent

PNode marqueeParent

pressPt

Point2D pressPt

canvasPressPt

Point2D canvasPressPt

Constructor Detail

PSWTSelectionEventHandler

public PSWTSelectionEventHandler(PNode marqueeParent,
                         PNode selectableParent)

Creates a selection event handler.

Parameters:

marqueeParent - The node to which the event handler dynamically adds a marquee (temporarily) to represent the area being selected.

selectableParent - The node whose children will be selected by this event handler.

PSWTSelectionEventHandler

public PSWTSelectionEventHandler(PNode marqueeParent,
                         List selectableParents)

Creates a selection event handler.

Parameters:

marqueeParent - The node to which the event handler dynamically adds a marquee (temporarily) to represent the area being selected.

selectableParents - A list of nodes whose children will be selected by this event handler.

Method Detail

decorateSelectedNode

public void decorateSelectedNode(PNode node)

Modifies the provided node so that it is displayed as selected.

Overrides:

decorateSelectedNode in class PSelectionEventHandler

Parameters:

node - node to be decorated

undecorateSelectedNode

public void undecorateSelectedNode(PNode node)

Undoes any modifications to the provided node so that it is not displayed as selected.

Overrides:

undecorateSelectedNode in class PSelectionEventHandler

Parameters:

node - node to be undecorated

initializeSelection

protected void initializeSelection(PInputEvent pie)

Starts a selection based on the provided event.

Overrides:

initializeSelection in class PSelectionEventHandler

Parameters:

pie - event used to populate the selection

initializeMarquee

protected void initializeMarquee(PInputEvent e)

Creates an empty marquee child for use in displaying the marquee around the selection.

Overrides:

initializeMarquee in class PSelectionEventHandler

Parameters:

e - event responsible for the initialization

updateMarquee

protected void updateMarquee(PInputEvent pie)

Updates the marquee rectangle as the result of a drag.

Overrides:

updateMarquee in class PSelectionEventHandler

Parameters:

pie - event responsible for the change in the marquee

getMarqueeBounds

protected PBounds getMarqueeBounds()

Returns the bounds of the current selection marquee.

Overrides:

getMarqueeBounds in class PSelectionEventHandler

Returns:

bounds of current selection marquee

endMarqueeSelection

protected void endMarqueeSelection(PInputEvent e)

Removes marquee and clears selection.

Overrides:

endMarqueeSelection in class PSelectionEventHandler

Parameters:

e - event responsible for the end of the selection

dragActivityStep

protected void dragActivityStep(PInputEvent aEvent)

This gets called continuously during the drag, and is used to animate the marquee.

Overrides:

dragActivityStep in class PSelectionEventHandler

Parameters:

aEvent - event responsible for this step in the drag sequence