com.maryanovsky.gwtutils.client
Interface DragAction

All Known Implementing Classes:

MapWidget.MapDragAction

public interface DragAction

An action which may be invoked when the mouse is dragged. See UserEventManager for further details.

Author:

Maryanovsky Alexander

Method Summary

void	mouseDragEnded(Widget target, PointView releasedPoint, PointView dragOffset) Invoked when a mouse-drag ends.
void	mouseDragged(Widget target, PointView mousePoint, PointView dragOffset) Invoked when the mouse is dragged.
void	mousePressed(Widget target, PointView pressedPoint) Invoked on mouse-press, when the drag possibly started.
void	mouseReleased(Widget target, PointView point) Invoked on mouse-release, when the drag action did not occur following the mouse-press.

Method Detail

mousePressed

void mousePressed(Widget target,
                  PointView pressedPoint)

Invoked on mouse-press, when the drag possibly started. "possibly", because it is impossible to tell whether a mouse-press is the start of a click or a drag gesture, at the time of the mouse-press. Only when mouseDragged(Widget, PointView, PointView) is invoked, is the drag gesture confirmed.

Parameters:

target - The widget where the mouse was pressed.

pressedPoint - The point where the mouse was pressed.

mouseReleased

void mouseReleased(Widget target,
                   PointView point)

Invoked on mouse-release, when the drag action did not occur following the mouse-press. Note that this is *not* invoked when the mouse drag did occur.

Parameters:

target - The widget where the mouse-drag started.

point - The point where the mouse was pressed and released.

mouseDragged

void mouseDragged(Widget target,
                  PointView mousePoint,
                  PointView dragOffset)

Invoked when the mouse is dragged.

Parameters:

target - The widget where the mouse was dragged.

mousePoint - The current location of the mouse pointer.

dragOffset - The offset from the point where the mouse was pressed to the current point.

mouseDragEnded

void mouseDragEnded(Widget target,
                    PointView releasedPoint,
                    PointView dragOffset)

Invoked when a mouse-drag ends.

Parameters:

target - The widget where the mouse was dragged.

releasedPoint - The point where the mouse was released.

dragOffset - The offset from the point where the mouse was pressed to the current point.