- 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 ofDragGestureRecognizerdefines aDragGestureRecognizerfor 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 protectedMouseDragGestureRecognizer(DragSource ds)Construct a newMouseDragGestureRecognizergiven theDragSourcefor theComponent.protectedMouseDragGestureRecognizer(DragSource ds, Component c)Construct a newMouseDragGestureRecognizergiven theDragSourcefor theComponentc, and theComponentto observe.protectedMouseDragGestureRecognizer(DragSource ds, Component c, int act)Construct a newMouseDragGestureRecognizergiven theDragSourcefor theComponentc, theComponentto observe, and the action(s) permitted for this drag operation.protectedMouseDragGestureRecognizer(DragSource ds, Component c, int act, DragGestureListener dgl)Construct a newMouseDragGestureRecognizergiven theDragSourcefor theComponentc, theComponentto observe, the action(s) permitted for this drag operation, and theDragGestureListenerto notify when a drag gesture is detected.
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description voidmouseClicked(MouseEvent e)Invoked when the mouse has been clicked on a component.voidmouseDragged(MouseEvent e)Invoked when a mouse button is pressed on a component.voidmouseEntered(MouseEvent e)Invoked when the mouse enters a component.voidmouseExited(MouseEvent e)Invoked when the mouse exits a component.voidmouseMoved(MouseEvent e)Invoked when the mouse button has been moved on a component (with no buttons no down).voidmousePressed(MouseEvent e)Invoked when a mouse button has been pressed on aComponent.voidmouseReleased(MouseEvent e)Invoked when a mouse button has been released on a component.protected voidregisterListeners()register this DragGestureRecognizer's Listeners with the Componentprotected voidunregisterListeners()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 newMouseDragGestureRecognizergiven theDragSourcefor theComponentc, theComponentto observe, the action(s) permitted for this drag operation, and theDragGestureListenerto 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 newMouseDragGestureRecognizergiven theDragSourcefor theComponentc, theComponentto 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 newMouseDragGestureRecognizergiven theDragSourcefor theComponentc, and theComponentto observe.- Parameters:
ds- The DragSource for the Component cc- The Component to observe
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MouseDragGestureRecognizer
protected MouseDragGestureRecognizer(DragSource ds)
Construct a newMouseDragGestureRecognizergiven theDragSourcefor 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:
registerListenersin classDragGestureRecognizer
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unregisterListeners
protected void unregisterListeners()
unregister this DragGestureRecognizer's Listeners with the Component subclasses must override this method- Specified by:
unregisterListenersin classDragGestureRecognizer
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mouseClicked
public void mouseClicked(MouseEvent e)
Invoked when the mouse has been clicked on a component.- Specified by:
mouseClickedin 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:
mousePressedin 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:
mouseReleasedin interfaceMouseListener- Parameters:
e- theMouseEvent
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mouseEntered
public void mouseEntered(MouseEvent e)
Invoked when the mouse enters a component.- Specified by:
mouseEnteredin interfaceMouseListener- Parameters:
e- theMouseEvent
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mouseExited
public void mouseExited(MouseEvent e)
Invoked when the mouse exits a component.- Specified by:
mouseExitedin 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:
mouseDraggedin 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:
mouseMovedin interfaceMouseMotionListener- Parameters:
e- theMouseEvent
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