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.
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Field Summary
Fields declared in class java.awt.dnd.DragGestureRecognizer
component, dragGestureListener, dragSource, events, sourceActions
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Constructor Summary
ModifierConstructorDescriptionprotected
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
.protected
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. -
Method Summary
Modifier and TypeMethodDescriptionvoid
Invoked when the mouse has been clicked on a component.void
Invoked when a mouse button is pressed on a component.void
Invoked when the mouse enters a component.void
Invoked when the mouse exits a component.void
Invoked when the mouse button has been moved on a component (with no buttons no down).void
Invoked when a mouse button has been pressed on aComponent
.void
Invoked when a mouse button has been released on a component.protected void
register this DragGestureRecognizer's Listeners with the Componentprotected void
unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this methodMethods declared in class java.awt.dnd.DragGestureRecognizer
addDragGestureListener, appendEvent, fireDragGestureRecognized, getComponent, getDragSource, getSourceActions, getTriggerEvent, removeDragGestureListener, resetRecognizer, setComponent, setSourceActions
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Constructor Details
-
MouseDragGestureRecognizer
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
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
-
MouseDragGestureRecognizer
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
c, and theComponent
to observe.- Parameters:
ds
- The DragSource for the Component cc
- The Component to observe
-
MouseDragGestureRecognizer
Construct a newMouseDragGestureRecognizer
given theDragSource
for theComponent
.- Parameters:
ds
- The DragSource for the Component
-
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Method Details
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registerListeners
protected void registerListeners()register this DragGestureRecognizer's Listeners with the Component- Specified by:
registerListeners
in classDragGestureRecognizer
-
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
Invoked when the mouse has been clicked on a component.- Specified by:
mouseClicked
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
-
mousePressed
Invoked when a mouse button has been pressed on aComponent
.- Specified by:
mousePressed
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
-
mouseReleased
Invoked when a mouse button has been released on a component.- Specified by:
mouseReleased
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
-
mouseEntered
Invoked when the mouse enters a component.- Specified by:
mouseEntered
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
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mouseExited
Invoked when the mouse exits a component.- Specified by:
mouseExited
in interfaceMouseListener
- Parameters:
e
- theMouseEvent
-
mouseDragged
Invoked when a mouse button is pressed on a component.- Specified by:
mouseDragged
in interfaceMouseMotionListener
- Parameters:
e
- theMouseEvent
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mouseMoved
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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