AbstractDragListener

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org.jempeg.empeg.emplode.action
Class AbstractDragListener

java.lang.Object
  org.jempeg.empeg.emplode.action.AbstractDragListener

All Implemented Interfaces:: java.util.EventListener, java.awt.event.MouseListener, java.awt.event.MouseMotionListener

Direct Known Subclasses:: TableDragListener, TreeDragListener

public abstract class AbstractDragListener
extends java.lang.Object
implements java.awt.event.MouseListener, java.awt.event.MouseMotionListener

AbstractDragListener implements simple drag-and-drop support for components. This handles autoscrolling. If only we could use J2SE for "real" dnd :(

Version:: $Revision: 1.5 $

Field Summary

private static int DRAG_THRESHOLD


private boolean myCanDragOutside


private boolean myDragging


private javax.swing.JLabel myDragLabel


private java.awt.Rectangle myDragRectangle


private java.lang.Object myDragSource


private java.lang.Object myDropTarget


private javax.swing.JFrame myFrame


private java.awt.Point myStartingPoint


Constructor Summary

AbstractDragListener(javax.swing.JFrame _frame)


Method Summary

protected abstract void drop(java.lang.Object _dragSource, java.lang.Object _dropTarget)


protected java.lang.Object getDragSource()


protected abstract java.lang.Object getDragSource(java.awt.event.MouseEvent _event)


protected abstract java.lang.String getDragTitle()


protected java.lang.Object getDropTarget()


protected abstract java.lang.Object getDropTarget(java.awt.event.MouseEvent _event)


void mouseClicked(java.awt.event.MouseEvent _event)
          This method is called when the mouse is clicked (pressed and released in short succession) on a component.

void mouseDragged(java.awt.event.MouseEvent _event)
          This method is called when the mouse is moved over a component while a button has been pressed.

void mouseEntered(java.awt.event.MouseEvent _event)
          This method is called when the mouse enters a component.

void mouseExited(java.awt.event.MouseEvent _event)
          This method is called when the mouse exits a component.

void mouseMoved(java.awt.event.MouseEvent _event)
          This method is called when the mouse is moved over a component while no button is pressed.

void mousePressed(java.awt.event.MouseEvent _event)
          This method is called when the mouse is pressed over a component.

void mouseReleased(java.awt.event.MouseEvent _event)
          This method is called when the mouse is released over a component.

protected void removeDragLabel()


protected void setCanDragOutside(boolean _canDragOutside)


Methods inherited from class java.lang.Object

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

Field Detail

DRAG_THRESHOLD

private static final int DRAG_THRESHOLD

See Also:: Constant Field Values

myFrame

private javax.swing.JFrame myFrame

myDragLabel

private javax.swing.JLabel myDragLabel

myDragSource

private java.lang.Object myDragSource

myDropTarget

private java.lang.Object myDropTarget

myDragRectangle

private java.awt.Rectangle myDragRectangle

myCanDragOutside

private boolean myCanDragOutside

myDragging

private boolean myDragging

myStartingPoint

private java.awt.Point myStartingPoint

Constructor Detail

AbstractDragListener

public AbstractDragListener(javax.swing.JFrame _frame)

Method Detail

getDragSource

protected abstract java.lang.Object getDragSource(java.awt.event.MouseEvent _event)

getDropTarget

protected abstract java.lang.Object getDropTarget(java.awt.event.MouseEvent _event)

getDragTitle

protected abstract java.lang.String getDragTitle()

drop

protected abstract void drop(java.lang.Object _dragSource,
                             java.lang.Object _dropTarget)

getDragSource

protected java.lang.Object getDragSource()

getDropTarget

protected java.lang.Object getDropTarget()

setCanDragOutside

protected void setCanDragOutside(boolean _canDragOutside)

mouseMoved

public void mouseMoved(java.awt.event.MouseEvent _event)

Description copied from interface: java.awt.event.MouseMotionListener

This method is called when the mouse is moved over a component while no button is pressed.

Specified by:: mouseMoved in interface java.awt.event.MouseMotionListener

mouseDragged

public void mouseDragged(java.awt.event.MouseEvent _event)

Description copied from interface: java.awt.event.MouseMotionListener

This method is called when the mouse is moved over a component while a button has been pressed.

Specified by:: mouseDragged in interface java.awt.event.MouseMotionListener