com.yworks.yfiles.view.input

Interface IPositionHandler

All Superinterfaces:

IDragHandler

All Known Implementing Classes:

ConstrainedPositionHandler, LabelPositionHandler, ReparentStripePositionHandler

public interface IPositionHandler
extends IDragHandler

Interface for an object that can handle the position of an item displayed in a CanvasControl.

The point as indicated by Location describes the current world coordinate position of the element. It is up to the implementation how this position is interpreted. The values returned by that instance will be used for the "originalLocation" parameter in the IDragHandler.handleMove(IInputModeContext, com.yworks.yfiles.geometry.PointD, com.yworks.yfiles.geometry.PointD), IDragHandler.cancelDrag(IInputModeContext, com.yworks.yfiles.geometry.PointD) and IDragHandler.dragFinished(IInputModeContext, com.yworks.yfiles.geometry.PointD, com.yworks.yfiles.geometry.PointD) methods. Items can be dragged with the mouse and an instance of this class will modify their position accordingly. Typically client code will use the Location's coordinates to determine the current position of the elements. A drag will trigger the invocation of IDragHandler.initializeDrag(IInputModeContext), zero or more IDragHandler.handleMove(IInputModeContext, com.yworks.yfiles.geometry.PointD, com.yworks.yfiles.geometry.PointD) calls, and finally by either IDragHandler.dragFinished(IInputModeContext, com.yworks.yfiles.geometry.PointD, com.yworks.yfiles.geometry.PointD) or IDragHandler.cancelDrag(IInputModeContext, com.yworks.yfiles.geometry.PointD).

See Also:

IDragHandler, IHandle, MoveInputMode

Method Summary

Methods inherited from interface com.yworks.yfiles.view.input.IDragHandler

cancelDrag, dragFinished, getLocation, handleMove, initializeDrag