File Doc Category Size Date Package
MouseDragGestureRecognizer.java API Doc Java SE 5 API 5562 Fri Aug 26 14:56:48 BST 2005 java.awt.dnd

MouseDragGestureRecognizer

java.lang.Object
- java.awt.dnd.DragGestureRecognizer

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 {@link 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 {@link DragSource#createDefaultDragGestureRecognizer} follow this convention.

author: Laurence P. G. Cable
version: 1.14
see: java.awt.dnd.DragGestureListener
see: java.awt.dnd.DragGestureEvent
see: java.awt.dnd.DragSource

Fields Summary
private static final long
serialVersionUID
Constructors Summary
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.
param
ds The DragSource for the Component c
param
c The Component to observe
param
act The actions permitted for this Drag
param
dgl The DragGestureListener to notify when a gesture is detected
super(ds, c, act, dgl);
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.
param
ds The DragSource for the Component c
param
c The Component to observe
param
act The actions permitted for this drag
this(ds, c, act, null);
protected MouseDragGestureRecognizer(DragSource ds, Component c)
Construct a new MouseDragGestureRecognizer given the DragSource for the Component c, and the Component to observe.
param
ds The DragSource for the Component c
param
c The Component to observe
this(ds, c, DnDConstants.ACTION_NONE);
protected MouseDragGestureRecognizer(DragSource ds)
Construct a new MouseDragGestureRecognizer given the DragSource for the Component.
param
ds The DragSource for the Component
this(ds, null);
Methods Summary
public void mouseClicked(java.awt.event.MouseEvent e)
Invoked when the mouse has been clicked on a component.
param
e the MouseEvent

public void mouseDragged(java.awt.event.MouseEvent e)
Invoked when a mouse button is pressed on a component.
param
e the MouseEvent

public void mouseEntered(java.awt.event.MouseEvent e)
Invoked when the mouse enters a component.
param
e the MouseEvent

public void mouseExited(java.awt.event.MouseEvent e)
Invoked when the mouse exits a component.
param
e the MouseEvent

public void mouseMoved(java.awt.event.MouseEvent e)
Invoked when the mouse button has been moved on a component (with no buttons no down).
param
e the MouseEvent

public void mousePressed(java.awt.event.MouseEvent e)
Invoked when a mouse button has been pressed on a Component.
param
e the MouseEvent

public void mouseReleased(java.awt.event.MouseEvent e)
Invoked when a mouse button has been released on a component.
param
e the MouseEvent

protected void registerListeners()
register this DragGestureRecognizer's Listeners with the Component
component.addMouseListener(this); component.addMouseMotionListener(this);
protected void unregisterListeners()
unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this method
component.removeMouseListener(this); component.removeMouseMotionListener(this);