javax.swing.plaf.basic
Class BasicDragGestureRecognizer

java.lang.Object
  javax.swing.plaf.basic.BasicDragGestureRecognizer

All Implemented Interfaces:

EventListener, MouseListener, MouseMotionListener

Direct Known Subclasses:

BasicListUI.ListDragGestureRecognizer, BasicTableUI.TableDragGestureRecognizer, BasicTextUI.TextDragGestureRecognizer, BasicTreeUI.TreeDragGestureRecognizer

class BasicDragGestureRecognizer

extends Object

implements MouseListener, MouseMotionListener

Default drag gesture recognition for drag operations performed by classses that have a dragEnabled property. The gesture for a drag in this package is a mouse press over a selection followed by some movement by enough pixels to keep it from being treated as a click.

Author:

Timothy Prinzing

Field Summary

private static boolean	checkedMotionThreshold
private MouseEvent	dndArmedEvent
private static int	motionThreshold

Constructor Summary

(package private)

BasicDragGestureRecognizer()

Method Summary

protected JComponent	getComponent(MouseEvent e)
private static int	getMotionThreshold()
private TransferHandler	getTransferHandler(MouseEvent e)
protected boolean	isDragPossible(MouseEvent e) Determines if the following are true: the press event is located over a selection the dragEnabled property is true A TranferHandler is installed This is implemented to check for a TransferHandler.
protected int	mapDragOperationFromModifiers(MouseEvent e)
void	mouseClicked(MouseEvent e) Invoked when the mouse button has been clicked (pressed and released) on a component.
void	mouseDragged(MouseEvent e) Invoked when a mouse button is pressed on a component and then dragged.
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 cursor has been moved onto a component but no buttons have been pushed.
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.

Methods inherited from class java.lang.Object

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

Field Detail

dndArmedEvent

private MouseEvent dndArmedEvent

motionThreshold

private static int motionThreshold

checkedMotionThreshold

private static boolean checkedMotionThreshold

Constructor Detail

BasicDragGestureRecognizer

BasicDragGestureRecognizer()

Method Detail

getMotionThreshold

private static int getMotionThreshold()

mapDragOperationFromModifiers

protected int mapDragOperationFromModifiers(MouseEvent e)

mouseClicked

public void mouseClicked(MouseEvent e)

Description copied from interface: MouseListener

Invoked when the mouse button has been clicked (pressed and released) on a component.

Specified by:

mouseClicked in interface MouseListener

mousePressed

public void mousePressed(MouseEvent e)

Description copied from interface: MouseListener

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

Specified by:

mousePressed in interface MouseListener

mouseReleased

public void mouseReleased(MouseEvent e)

Description copied from interface: MouseListener

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

Specified by:

mouseReleased in interface MouseListener

mouseEntered

public void mouseEntered(MouseEvent e)

Description copied from interface: MouseListener

Invoked when the mouse enters a component.

Specified by:

mouseEntered in interface MouseListener

mouseExited

public void mouseExited(MouseEvent e)

Description copied from interface: MouseListener

Invoked when the mouse exits a component.

Specified by:

mouseExited in interface MouseListener

mouseDragged

public void mouseDragged(MouseEvent e)

Description copied from interface: MouseMotionListener

Invoked when a mouse button is pressed on a component and then dragged. MOUSE_DRAGGED events will continue to be delivered to the component where the drag originated until the mouse button is released (regardless of whether the mouse position is within the bounds of the component).

Due to platform-dependent Drag&Drop implementations, MOUSE_DRAGGED events may not be delivered during a native Drag&Drop operation.

Specified by:

mouseDragged in interface MouseMotionListener

mouseMoved

public void mouseMoved(MouseEvent e)

Description copied from interface: MouseMotionListener

Invoked when the mouse cursor has been moved onto a component but no buttons have been pushed.

Specified by:

mouseMoved in interface MouseMotionListener

getTransferHandler

private TransferHandler getTransferHandler(MouseEvent e)

isDragPossible

protected boolean isDragPossible(MouseEvent e)

Determines if the following are true:

• the press event is located over a selection
• the dragEnabled property is true
• A TranferHandler is installed

This is implemented to check for a TransferHandler. Subclasses should perform the remaining conditions.

getComponent

protected JComponent getComponent(MouseEvent e)