Re: DisplayEvent not emulating central click

• To: ANDRES DAVID ACERO MONTOYA <adacero@xxxxxxxxxxxxxxxxxxxx>
• Subject: Re: DisplayEvent not emulating central click
• From: Bill Hibbard <billh@xxxxxxxxxxxxx>
• Date: Tue, 4 Feb 2003 14:25:58 -0600 (CST)

Hi Andres,

I am CC'ing visad-list because I have verified the problem
you noted in your original message. I get a related problem
on my Windows NT system. In my case when I press the center
mouse button, the java.awt.event.AWTEvent, which is also an
InputEvent, has its InputEvent.CTRL_MASK bit set to indicate
that the CTRL key is pressed, even though it isn't.

The behavior you observe, with the coordinates displayed
but no movement, can also be explained by the AWTEvent
having incorrect bits for CTRL and/or SHIFT keys. This looks
like a Java / Windows bug. You might be able to work around
with appropriate calls to MouseHelper.setFunctionMap(). See
visad/examples/Test00.java for an example.

Good luck,
Bill


On Mon, 3 Feb 2003, ANDRES DAVID ACERO MONTOYA wrote:

> Hello
>
> We still can´t find the source of the problem. We have made the change again
> to the old visad release and it worked (the emulation) but the new still
> doesn´t.
> All this without any change in the class that uses it. We are using a two
> button mouse,
>  jdk 1.4.0 and Windows 2000. When we made a :
>
> System.out.println(""+e);
>
> in the displayChanged(DisplayEvent e)
>
> and the output shows that is not detecting a simultaneous click but a
> separate one (new release of visad).
>
> Output:
>
> DisplayEvent: Display=display0, Id=FRAME_DONE, X=0, Y=0, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_PRESSED, X=202, Y=240, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_PRESSED_RIGHT, X=202, Y=240,
> remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_PRESSED, X=202, Y=240, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_PRESSED_LEFT, X=202, Y=240,
> remoteId=0
> DisplayEvent: Display=display0, Id=FRAME_DONE, X=0, Y=0, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_RELEASED, X=202, Y=240, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_RELEASED_LEFT, X=202, Y=240,
> remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_RELEASED, X=202, Y=240, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_RELEASED_RIGHT, X=202, Y=240,
> remoteId=0
> DisplayEvent: Display=display0, Id=FRAME_DONE, X=0, Y=0, remoteId=0
>
>
> Using a 3 button mouse and using the central button (and the new release
> of visad)
> the output is as follows:
>
> DisplayEvent: Display=display0, Id=MOUSE_PRESSED, X=210, Y=248, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_PRESSED_CENTER, X=210, Y=248,
> remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_RELEASED, X=210, Y=249, remoteId=0
> DisplayEvent: Display=display0, Id=MOUSE_RELEASED_CENTER, X=210, Y=249,
> remoteId=0
> DisplayEvent: Display=display0, Id=FRAME_DONE, X=0, Y=0, remoteId=0
>
>
> Another important detail is that when we use the two button mouse to
> emulate the central click the values
> of the domain set appear on the superior left corner of the display
> (latitude and longitude)
> but the event fired to the displayChanged is not the central click.
>
>
> Thanks again,
>
> Andres David Acero M.
> Universidad Nacional de Colombia Medellín
> HidroSIGJava Programmer
>
>
> > Hi Andres,
> >
> >> We have changed the visad release recently. And when we did it the
> >> emulation of the central button by pressing both buttons on the mouse
> >> stopped working. It may be a driver problem or have you changed it
> >> lately. If you haven´t would you be interested in the details of the
> >> circunstances?
> >
> > I just tried clicking the left and right buttons to
> > emulate the center button, with the latest release,
> > and it worked OK for me. Perhaps as you suggest you
> > have a driver problem.
> >
> > Good luck,
> > Bill
>
>
>
>

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