Module java.desktop

Package java.awt.dnd

Class MouseDragGestureRecognizer

java.lang.Object

java.awt.dnd.DragGestureRecognizer

java.awt.dnd.MouseDragGestureRecognizer

All Implemented Interfaces:

MouseListener, MouseMotionListener, Serializable, EventListener

public abstract class MouseDragGestureRecognizer
extends DragGestureRecognizer
implements MouseListener, MouseMotionListener

This abstract subclass of DragGestureRecognizer defines a DragGestureRecognizer for mouse-based gestures. Each platform implements its own concrete subclass of this class, available via the Toolkit.createDragGestureRecognizer() method, to encapsulate the recognition of the platform dependent mouse gesture(s) that initiate a Drag and Drop operation.

Mouse drag gesture recognizers should honor the drag gesture motion threshold, available through DragSource.getDragThreshold(). A drag gesture should be recognized only when the distance in either the horizontal or vertical direction between the location of the latest mouse dragged event and the location of the corresponding mouse button pressed event is greater than the drag gesture motion threshold.

Drag gesture recognizers created with DragSource.createDefaultDragGestureRecognizer(java.awt.Component, int, java.awt.dnd.DragGestureListener) follow this convention.

See Also:

DragGestureListener, DragGestureEvent, DragSource, Serialized Form

Field Summary

Fields declared in class java.awt.dnd.DragGestureRecognizer

component, dragGestureListener, dragSource, events, sourceActions

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	MouseDragGestureRecognizer(DragSource ds)	Construct a new MouseDragGestureRecognizer given the DragSource for the Component.
protected	MouseDragGestureRecognizer(DragSource ds, Component c)	Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, and the Component to observe.
protected	MouseDragGestureRecognizer(DragSource ds, Component c, int act)	Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, the Component to observe, and the action(s) permitted for this drag operation.
protected	MouseDragGestureRecognizer(DragSource ds, Component c, int act, DragGestureListener dgl)	Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, the Component to observe, the action(s) permitted for this drag operation, and the DragGestureListener to notify when a drag gesture is detected.

Method Summary

Modifier and Type	Method	Description
void	mouseClicked(MouseEvent e)	Invoked when the mouse has been clicked on a component.
void	mouseDragged(MouseEvent e)	Invoked when a mouse button is pressed on a component.
void	mouseEntered(MouseEvent e)	Invoked when the mouse enters a component.
void	mouseExited(MouseEvent e)	Invoked when the mouse exits a component.
void	mouseMoved(MouseEvent e)	Invoked when the mouse button has been moved on a component (with no buttons no down).
void	mousePressed(MouseEvent e)	Invoked when a mouse button has been pressed on a Component.
void	mouseReleased(MouseEvent e)	Invoked when a mouse button has been released on a component.
protected void	registerListeners()	register this DragGestureRecognizer's Listeners with the Component
protected void	unregisterListeners()	unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this method

Methods declared in class java.awt.dnd.DragGestureRecognizer

addDragGestureListener, appendEvent, fireDragGestureRecognized, getComponent, getDragSource, getSourceActions, getTriggerEvent, removeDragGestureListener, resetRecognizer, setComponent, setSourceActions

Methods declared in class java.lang.Object

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

Constructor Details

MouseDragGestureRecognizer

protected MouseDragGestureRecognizer(DragSource ds, Component c, int act, DragGestureListener dgl)

Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, the Component to observe, the action(s) permitted for this drag operation, and the DragGestureListener to notify when a drag gesture is detected.

Parameters:

ds - The DragSource for the Component c

c - The Component to observe

act - The actions permitted for this Drag

dgl - The DragGestureListener to notify when a gesture is detected

MouseDragGestureRecognizer

protected MouseDragGestureRecognizer(DragSource ds, Component c, int act)

Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, the Component to observe, and the action(s) permitted for this drag operation.

Parameters:

ds - The DragSource for the Component c

c - The Component to observe

act - The actions permitted for this drag

MouseDragGestureRecognizer

protected MouseDragGestureRecognizer(DragSource ds, Component c)

Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, and the Component to observe.

Parameters:

ds - The DragSource for the Component c

c - The Component to observe

MouseDragGestureRecognizer

protected MouseDragGestureRecognizer(DragSource ds)

Construct a new MouseDragGestureRecognizer given the DragSource for the Component.

Parameters:

ds - The DragSource for the Component

Method Details

registerListeners

protected void registerListeners()

register this DragGestureRecognizer's Listeners with the Component

Specified by:

registerListeners in class DragGestureRecognizer

unregisterListeners

protected void unregisterListeners()

unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this method

Specified by:

unregisterListeners in class DragGestureRecognizer

mouseClicked

public void mouseClicked(MouseEvent e)

Invoked when the mouse has been clicked on a component.

Specified by:

mouseClicked in interface MouseListener

Parameters:

e - the MouseEvent

mousePressed

public void mousePressed(MouseEvent e)

Invoked when a mouse button has been pressed on a Component.

Specified by:

mousePressed in interface MouseListener

Parameters:

e - the MouseEvent

mouseReleased

public void mouseReleased(MouseEvent e)

Invoked when a mouse button has been released on a component.

Specified by:

mouseReleased in interface MouseListener

Parameters:

e - the MouseEvent

mouseEntered

public void mouseEntered(MouseEvent e)

Invoked when the mouse enters a component.

Specified by:

mouseEntered in interface MouseListener

Parameters:

e - the MouseEvent

mouseExited

public void mouseExited(MouseEvent e)

Invoked when the mouse exits a component.

Specified by:

mouseExited in interface MouseListener

Parameters:

e - the MouseEvent

mouseDragged

public void mouseDragged(MouseEvent e)

Invoked when a mouse button is pressed on a component.

Specified by:

mouseDragged in interface MouseMotionListener

Parameters:

e - the MouseEvent

mouseMoved

public void mouseMoved(MouseEvent e)

Invoked when the mouse button has been moved on a component (with no buttons no down).

Specified by:

mouseMoved in interface MouseMotionListener

Parameters:

e - the MouseEvent