RE: JTree doubleclick

[Song, Mingjian]

Hi, Klaus,

 

I think you might want to look into the source code of

javax.swing.plaf.basic.BasicTreeUI class.

 

It defines a MouseHandler inner-class to handle the mouse

click on the Tree. The mouseHandler calls a protected method

to check if the mouse event is a "toggle" event.

 

/**

 * The following code was copied straightly from the

 * BasicTreeUI.java source code

 */

 

/**
 * Returning true indicates the row under the mouse should be toggled
 * based on the event. This is invoked after checkForClickInExpandControl,
 * implying the location is not in the expand (toggle) control
 */
protected boolean isToggleEvent(MouseEvent event) {
   if(!SwingUtilities.isLeftMouseButton(event)) {
       return false;
   }

 

   // NOTE: This will be enabled in a future release.
   int           clickCount = 2;//tree.getToggleClickCount();

 

   if(clickCount <= 0) {
       return false;
   }
   return (event.getClickCount() == clickCount);
}

 

I guess if you override this method in your customized UI class,

so it return false even if it is double click, it might work.

 

I never tried it before, but hope it helps.

 

Mingjian Song

 

-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On Behalf Of [EMAIL PROTECTED]
Sent: Monday, March 18, 2002 7:30 AM
To: [EMAIL PROTECTED]
Subject: JTree doubleclick

Hi,

I need a JTree which open a Dialog Window if someone makes a doubleclick on a node.
It is no big problem and I made it work, but my problem is, that the Tree does expand/collapse each time someone doubleclicks on it. (This is default behaviour)

Is there a way to turn this behaviour off? I dont want to turn off all expand/collapse events, because I must be able to expand / collapse by clicking on the '+/- ' signs in front of a node to expand/collapse this node, ('+/-' look so in windows Look & Feel only).

Anyone understands my english and can help me?

Klaus Krieger