🚀 go-pugleaf

In article <360DCAE7.ABB78C37@xnote.com>, vernon@xnote.com says...
> I've got a question that I need some help on.
> 
> I've created a Panel, and dynamically added what are basically canvas'.
> How do I create an even that will allow me to click on the canvas?  I
> can't figure out how to create the actionevents when I dynamically
> create the canvas'.
> 
> Anyone got any ideas?
> 
> 
What I've done is to code a method that takes a component as an argument, 
and sets up delegating the various events I'm interested in to a single 
handler, which determines the work.  i.e.

  private void setAdapters( Component c ) {

    c.addMouseListener( new MouseAdapter() {
      public void mousePressed(MouseEvent event) {
        handleMouseEvent( event );
      }
      public void mouseEntered(MouseEvent event) {
        handleMouseEvent( event );
      }
      public void mouseExited(MouseEvent event) {
        handleMouseEvent( event );
      }
      public void mouseReleased(MouseEvent event) {
        handleMouseEvent( event );
      }
      public void mouseClicked(MouseEvent event) {
        handleMouseEvent( event );
      }

    });

    c.addMouseMotionListener( new MouseMotionAdapter() {
      public void mouseMoved(MouseEvent event) {
        handleMouseEvent( event );
      }
      public void mouseDragged(MouseEvent event) {
        handleMouseEvent( event );
      }
    });
  }

Then:

  void handleMouseEvent(MouseEvent e ) {
    ((DesignerPanel)getParent()).handleChildMouseEvent( e, this );
  }

Then in the master handler for the dynamically added components that 
resides in the parent:

  public void handleChildMouseEvent( MouseEvent e, DPComponent dp ) {
    Object source = e.getSource();
    switch(e.getID()) {

      case MouseEvent.MOUSE_ENTERED:
        if (bBatchMove ) {
          dp.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
          break;
        }


etc.
etc.

You might make a subclass of Canvas that contains enough info so that the 
master handler knows which one it is dealing with, if that is important 
for you.

Tad Frysinger
[TeamB]