Re: Pause Mouse and X11 Window Close

[John C. <j-c...@ra...>]

Ethan Merritt wrote:

> On Monday 21 June 2004 06:24 am, John Cerney wrote:
> 
>>I am waiting for mouse input so that mousing is available while the user
>>is viewing the plot. For example, if a 3d surface plot is displayed, I
>>would do a "pause mouse" so that the users could rotate/scale with plot
>>with their mouse.
> 
> 
> But that's not going to work.  If you say "pause mouse" then it will
> terminate at the first mouse click (or actually at the first time the
> button is released).  So you can't do rotate/scale/zoom inside a
> pause mouse as it is currently implemented.  This is something
> that Petr and I were discussing before, but we didn't come to any
> particular resolution.
> 
> But you don't need a 'pause mouse' command for this anyhow.
> What's wrong with a regular 'pause -1' command?  You can still
> exit from the pause via a ctrl-C, or a hotkey, or an external trigger.
> 
> Another possibility is to put gnuplot into a loop that goes something
> like
> 	load 'loop-until-key'
> 
> where the file 'loop-until-key' contains
> 	pause 1
> 	if (MOUSE_KEY != <something>) reread

I am currently doing something similar, but my 'loop-until-key' file 
contains:

pause mouse
if (defined(MOUSE_BUTTON)) \
     print "Mouse button Clicked:", MOUSE_BUTTON;\
else \
     print "No mouse click?" ;\
     exit ;\
reread


I do a "pause mouse" (rather than pause 1), because I want to detect a 
mouse button-3 key event in my main program so I can pop-up a context menu.

The only problem with the approach so far is (as we have discussed) if 
the windows is closed during the "pause mouse", gnuplot hangs.


> 
> Actually I don't think that quite works currently, but it could be made
> to work if people decide it's a useful option.
> 
> 
>> >  Wouldn't it be
>> > better to program a hot key ("bind <key> '<gnuplot commands>'")?
>> > That way the user can either hit the appropriate key or close
>> > the window and in either case the response is handled asynchronously.
>>
>>I could have a hotkey to close the window, but users are so conditioned
>>to just close windows when they are done with a window, I don't think
>>many would actually use the hotkey.
> 
> 
> The cvs version should now be able to detect normal window-close
> events.
> 

I tried this last night with the latest CVS version and it didn't appear 
to be working for me. My simple test was this file:

set mouse
set term x11
splot cos(x)*sin(y)
pause mouse
if (defined(MOUSE_BUTTON)) \
     print "1 Mouse button Clicked:", MOUSE_BUTTON;\
else \
     print "No mouse click?" ;\
     exit ;
print "doing something else";
pause mouse
if (defined(MOUSE_BUTTON)) \
     print "1 Mouse button Clicked:", MOUSE_BUTTON;\
else \
     print "No mouse click?" ;\
     exit ;


When I run gnuplot with this file, and close the plot window when it 
shows up, gnuplot still hangs. With the changes you made, I was 
expecting the close window to break-out of the pause mouse, and set 
MOUSE_BUTTON to undefined or -1 or something. Does the above file work 
the same way with you?

Thanks,

John