ptolemy.vergil.basic

Class LocatableNodeDragInteractor

java.lang.Object

diva.canvas.interactor.AbstractInteractor

diva.canvas.interactor.DragInteractor

diva.graph.NodeDragInteractor

ptolemy.vergil.basic.LocatableNodeDragInteractor

All Implemented Interfaces:

diva.canvas.event.LayerListener, diva.canvas.event.LayerMotionListener, diva.canvas.interactor.Interactor, java.util.EventListener

public class LocatableNodeDragInteractor
extends diva.graph.NodeDragInteractor

An interaction role that drags nodes that have locatable objects as semantic objects. When the node is dragged, this interactor updates the location in the locatable object with the new location of the figure.

The dragging of a selection is undoable, and is based on the difference between the point where the mouse was pressed and where the mouse was released. This information is used to create MoML to undo the move if requested.

Since:

Ptolemy II 2.0

Author:

Steve Neuendorffer

Pt.AcceptedRating:

Red (johnr)

Pt.ProposedRating:

Red (eal)

Constructor Summary

Constructors

Constructor and Description
LocatableNodeDragInteractor(LocatableNodeController controller) Create a new interactor contained within the given controller.

Method Summary

Modifier and Type	Method and Description
void	mousePressed(diva.canvas.event.LayerEvent e) When the mouse is pressed before dragging, store a copy of the pressed point location so that a relative move can be evaluated for undo purposes.
void	mouseReleased(diva.canvas.event.LayerEvent e) When the mouse is released after dragging, mark the frame modified and update the panner, and generate an undo entry for the move.
void	setSnapResolution(double resolution) Specify the snap resolution.
void	translate(diva.canvas.event.LayerEvent e, double x, double y) Drag all selected nodes and move any attached edges.

Methods inherited from class diva.graph.NodeDragInteractor

getController

Methods inherited from class diva.canvas.interactor.DragInteractor

addLayerListener, appendConstraint, constrainPoint, fireLayerEvent, getSelectiveEnabled, getTargetArray, getX, getY, mouseDragged, prependConstraint, removeLayerListener, setSelectiveEnabled, setTargetArray, setup, targets

Methods inherited from class diva.canvas.interactor.AbstractInteractor

accept, getMouseFilter, isConsuming, isEnabled, isMotionEnabled, mouseClicked, mouseEntered, mouseExited, mouseMoved, setConsuming, setEnabled, setMotionEnabled, setMouseFilter

Methods inherited from class java.lang.Object

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

Constructor Detail

LocatableNodeDragInteractor

public LocatableNodeDragInteractor(LocatableNodeController controller)

Create a new interactor contained within the given controller.

Parameters:

controller - The controller.

Method Detail

mousePressed

public void mousePressed(diva.canvas.event.LayerEvent e)

When the mouse is pressed before dragging, store a copy of the pressed point location so that a relative move can be evaluated for undo purposes.

Specified by:

mousePressed in interface diva.canvas.event.LayerListener

Overrides:

mousePressed in class diva.canvas.interactor.DragInteractor

Parameters:

e - The press event.

mouseReleased

public void mouseReleased(diva.canvas.event.LayerEvent e)

When the mouse is released after dragging, mark the frame modified and update the panner, and generate an undo entry for the move. If no movement has occurred, then do nothing.

Specified by:

mouseReleased in interface diva.canvas.event.LayerListener

Overrides:

mouseReleased in class diva.canvas.interactor.DragInteractor

Parameters:

e - The release event.

setSnapResolution

public void setSnapResolution(double resolution)

Specify the snap resolution. The default snap resolution is 5.0.

Parameters:

resolution - The snap resolution.

translate

public void translate(diva.canvas.event.LayerEvent e,
                      double x,
                      double y)

Drag all selected nodes and move any attached edges. Update the locatable nodes with the current location.

Overrides:

translate in class diva.graph.NodeDragInteractor

Parameters:

e - The event triggering this translation.

x - The horizontal delta.

y - The vertical delta.