Popup-menus and object selection

JGo
1

Hi,

I’ve added a popup-menu to the JGoView canvas using its
addMouseListener method. The popup-menu is supposed to act on the
current object selection. However, the right-click changes this
selection, so this has to be suppressed. The following does this:

  new JGoView(document)
  {
    public boolean
    doMouseDown(int modifiers, Point dc, Point vc)
    {
      return

     &nbs p;  (modifiers & MouseEvent.BUTTON3_MASK) == 0 &&

     &nbs p;    super.doMouseDown(modifiers, dc, vc);
    }

    public boolean
    doMouseUp(int modifiers, Point dc, Point vc)
    {
      return

     &nbs p;  (modifiers & MouseEvent.BUTTON3_MASK) == 0 &&

     &nbs p;    super.doMouseUp(modifiers, dc, vc);
    }
  };

The problem with this solution is that it tests which button was
physically clicked, while it should test whether the mouse event was a
popup-trigger, as an ordinary mouse event listener does. Only then it
will be portable. Is there a way to achieve this?

Regards,

Werner.

2

I haven’t tried this, but maybe something like:
public boolean doMouseUp(int modifiers, Point dc, Point vc) {
if (getCurrentMouseEvent() != null &&
getCurrentMouseEvent().i sPopupTrigger()) {
return doPopupMenu(modifiers, dc, vc);
}
// otherwise implement the default behavior
return super.doMouseUp(modifiers, dc, vc);
}
Same for doMouseDown, of course.

3

It appears that getCurrentMouseEvent().isPopupTrigger() always returns true, no matter which button was pressed.

Werner.

4

That’s odd – it’s always worked for me. Flower uses it, for example.

5

I did indeed make a mistake when looking at the traces. Sorry for that.
Now I see that the down event is a popup trigger while the up isn’t.
This means I’ll have to keep state between the two methods in order to
kill the mouse event in other when one is a popup trigger, otherwise
the selection will still change. This will probably work, so thank you
very much again!

Werner.