- java.lang.Object
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- java.awt.dnd.DragGestureRecognizer
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- java.awt.dnd.MouseDragGestureRecognizer
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- All Implemented Interfaces:
MouseListener
,MouseMotionListener
,Serializable
,EventListener
public abstract class MouseDragGestureRecognizer extends DragGestureRecognizer implements MouseListener, MouseMotionListener
This abstract subclass ofDragGestureRecognizer
defines aDragGestureRecognizer
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
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Field Summary
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Fields declared in class java.awt.dnd.DragGestureRecognizer
component, dragGestureListener, dragSource, events, sourceActions
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Constructor Summary
Constructors Modifier Constructor Description protected
MouseDragGestureRecognizer(DragSource ds)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
.protected
MouseDragGestureRecognizer(DragSource ds, Component c)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, and theComponent
to observe.protected
MouseDragGestureRecognizer(DragSource ds, Component c, int act)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, theComponent
to observe, and the action(s) permitted for this drag operation.protected
MouseDragGestureRecognizer(DragSource ds, Component c, int act, DragGestureListener dgl)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, theComponent
to observe, the action(s) permitted for this drag operation, and theDragGestureListener
to notify when a drag gesture is detected.
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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 aComponent
.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 Componentprotected 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
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Constructor Detail
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MouseDragGestureRecognizer
protected MouseDragGestureRecognizer(DragSource ds, Component c, int act, DragGestureListener dgl)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, theComponent
to observe, the action(s) permitted for this drag operation, and theDragGestureListener
to notify when a drag gesture is detected.- Parameters:
ds
- The DragSource for the Component cc
- The Component to observeact
- The actions permitted for this Dragdgl
- The DragGestureListener to notify when a gesture is detected
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MouseDragGestureRecognizer
protected MouseDragGestureRecognizer(DragSource ds, Component c, int act)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, theComponent
to observe, and the action(s) permitted for this drag operation.- Parameters:
ds
- The DragSource for the Component cc
- The Component to observeact
- The actions permitted for this drag
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MouseDragGestureRecognizer
protected MouseDragGestureRecognizer(DragSource ds, Component c)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, and theComponent
to observe.- Parameters:
ds
- The DragSource for the Component cc
- The Component to observe
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MouseDragGestureRecognizer
protected MouseDragGestureRecognizer(DragSource ds)
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
.- Parameters:
ds
- The DragSource for the Component
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Method Detail
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registerListeners
protected void registerListeners()
register this DragGestureRecognizer's Listeners with the Component- Specified by:
registerListeners
in classDragGestureRecognizer
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unregisterListeners
protected void unregisterListeners()
unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this method- Specified by:
unregisterListeners
in classDragGestureRecognizer
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mouseClicked
public void mouseClicked(MouseEvent e)
Invoked when the mouse has been clicked on a component.- Specified by:
mouseClicked
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
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mousePressed
public void mousePressed(MouseEvent e)
Invoked when a mouse button has been pressed on aComponent
.- Specified by:
mousePressed
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
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mouseReleased
public void mouseReleased(MouseEvent e)
Invoked when a mouse button has been released on a component.- Specified by:
mouseReleased
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
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mouseEntered
public void mouseEntered(MouseEvent e)
Invoked when the mouse enters a component.- Specified by:
mouseEntered
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
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mouseExited
public void mouseExited(MouseEvent e)
Invoked when the mouse exits a component.- Specified by:
mouseExited
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
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mouseDragged
public void mouseDragged(MouseEvent e)
Invoked when a mouse button is pressed on a component.- Specified by:
mouseDragged
in interfaceMouseMotionListener
- Parameters:
e
- theMouseEvent
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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 interfaceMouseMotionListener
- Parameters:
e
- theMouseEvent
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