AfflictionNetworks/samskivert
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- listen for mouseExited during a drag and clear the target

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- broke enter/exit/released into their own methods
- don't assume components don't have their own custom cursors, restore their
old cursors when we're done with them.


git-svn-id: https://samskivert.googlecode.com/svn/trunk@816 6335cc39-0255-0410-8fd6-9bcaacd3b74c
This commit is contained in:
ray
2002-08-20 21:05:10 +00:00
parent e12f2e9a51
commit 756d6d9702
1 changed files with 60 additions and 22 deletions
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projects/samskivert/src/java/com/samskivert/swing/dnd/DnDManager.java
+60 -22
View File
@@ -1,5 +1,5 @@
//
// $Id: DnDManager.java,v 1.1 2002/08/20 02:49:19 ray Exp $
// $Id: DnDManager.java,v 1.2 2002/08/20 21:05:10 ray Exp $
package com.samskivert.swing.dnd;
@@ -124,38 +124,73 @@ public class DnDManager
// and start out with the no-drop cursor
_lastComp = _sourceComp;
_oldCursor = _lastComp.getCursor();
_lastComp.setCursor(_cursors[1]);
}
// documentation inherited from interface AWTEventListener
public void eventDispatched (AWTEvent event)
{
int id = event.getID();
if (id == MouseEvent.MOUSE_ENTERED) {
Component oldcomp = _lastComp;
_lastComp = ((MouseEvent) event).getComponent();
_lastTarget = findAppropriateTarget(_lastComp);
_lastComp.setCursor(_cursors[(_lastTarget == null) ? 1 : 0]);
if (_lastComp != oldcomp) {
oldcomp.setCursor(null);
}
switch (event.getID()) {
case MouseEvent.MOUSE_ENTERED:
mouseEntered((MouseEvent) event);
break;
} else if (id == MouseEvent.MOUSE_RELEASED) {
// since the release comes with a component of the source,
// we use the last enter...
if (_lastTarget != null) {
_lastTarget.dropCompleted(_data[0]);
_source.dragCompleted(_lastTarget);
}
case MouseEvent.MOUSE_EXITED:
mouseExited((MouseEvent) event);
break;
if (_lastComp != null) {
_lastComp.setCursor(null);
}
Toolkit.getDefaultToolkit().removeAWTEventListener(this);
reset();
case MouseEvent.MOUSE_RELEASED:
mouseReleased((MouseEvent) event);
break;
}
}
/**
* Handle the mouse entering a new component.
*/
protected void mouseEntered (MouseEvent event)
{
Component oldcomp = _lastComp;
_lastComp = ((MouseEvent) event).getComponent();
_lastTarget = findAppropriateTarget(_lastComp);
if (_lastComp != oldcomp) {
oldcomp.setCursor(_oldCursor);
_oldCursor = _lastComp.getCursor();
}
_lastComp.setCursor(_cursors[(_lastTarget == null) ? 1 : 0]);
}
/**
* Handle the mouse leaving a component.
*/
protected void mouseExited (MouseEvent event)
{
_lastTarget = null;
if (_lastComp != null) {
_lastComp.setCursor(_oldCursor);
}
}
/**
* Handle the mouse button being released.
*/
protected void mouseReleased (MouseEvent event)
{
// since the release comes with a component of the source,
// we use the last enter...
if (_lastTarget != null) {
_lastTarget.dropCompleted(_data[0]);
_source.dragCompleted(_lastTarget);
}
if (_lastComp != null) {
_lastComp.setCursor(_oldCursor);
}
Toolkit.getDefaultToolkit().removeAWTEventListener(this);
reset();
}
/**
* Find the lowest accepting parental target to this component.
*/
@@ -218,6 +253,9 @@ public class DnDManager
/** The last target, or null if no last target. */
protected DropTarget _lastTarget;
/** The cursor that used to be set for _lastComp. */
protected Cursor _oldCursor;
/** The accept/reject cursors. */
protected Cursor[] _cursors = new Cursor[2];