| Re: xmanager does not block [message #19131] |
Mon, 28 February 2000 00:00 |
davidf
Messages: 2866
Registered: September 1996
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Senior Member |
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marc (m_schellens@hotmail.com) writes:
> I have a program, wich calls:
> xmanager,name,tlb
> (without /NO_BLOCK) but xmanager immediately returns.
> Is there a common mistake I might have made?
No mistake. I'm guessing you are calling this program
from within a widget program that is *itself* blocking.
Only the first program that calls for a block actually
blocks. All the rest run through the block. In practice
you usually make these other program modal programs.
You can read this article for more information:
http://www.dfanning.com/tips/modal_blocking.html
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting
Phone: 970-221-0438 E-Mail: davidf@dfanning.com
Coyote's Guide to IDL Programming: http://www.dfanning.com/
Toll-Free IDL Book Orders: 1-888-461-0155
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| Re: xmanager does not block [message #19140 is a reply to message #19131] |
Mon, 28 February 2000 00:00  |
Karri Kaksonen
Messages: 27
Registered: October 1999
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Junior Member |
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Marc,
I assume that you try to do the same thing I had problems with.
To have IDL do calculations while you want to access menus
and process keypresses etc.
I found a solution that works for me:
Create a procedure that sends events like
pro rawgui::send_event,widgetID
event = { $
id:widgetID, $
top:self.tlb, $
handler:widgetID, $
select: 1l $
}
widget_control,widgetID,send_event=event
end
Create a procedure that starts the processing like
pro rawgui::reconstart
self->send_event,self.reconrestID
end
Create a procedure that does one piece of processing
pro rawgui::reconstep
self.proviewfileio->prodat
if more_to_do ne 0 then self->send_event,self.reconrestID
end
Create an event handler like
pro rawgui_events, event
widget_control, event.top, get_uvalue=self, /no_copy
widget_control, event.id, get_uvalue=request
case request of
'readall': begin
self->reconstart
end
'reconrest': begin
self->reconstep
end
end
Now you can put xmanager where it belongs
pro rawgui::makewindow
self.viewID = obj_new('idlgrview', color=[80,80,80],
viewplane_rect=self.viewport)
tlb = widget_base(title='Marconi Medical MRI Data Display',
column=2, tlb_size_events = 1, mbar=menuID)
... a lot of buttons etc ...
self.reconrestID = widget_label(tlb, value='',
uvalue='reconrest', event_pro='rawgui_events')
xmanager, 'rawgui', tlb, /no_block, group_leader=groupLeader,
event_handler='rawgui_events'
end
I also believe that xmanager should always return.
to block or not to block refers to whether you can
use the command line while your program executes.
--
Hope this helps...,
Karri
marc wrote:
>
> marc wrote:
>>
>> I have a program, wich calls:
>> xmanager,name,tlb
>> (without /NO_BLOCK) but xmanager immediately returns.
>> Is there a common mistake I might have made?
>>
>> thanks,
>> :-) marc
> Might it be because I call xmanager from within a widget procedure?
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| Re: xmanager does not block [message #19144 is a reply to message #19131] |
Mon, 28 February 2000 00:00 |
marc schellens[1]
Messages: 183
Registered: January 2000
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Senior Member |
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marc wrote:
>
> I have a program, wich calls:
> xmanager,name,tlb
> (without /NO_BLOCK) but xmanager immediately returns.
> Is there a common mistake I might have made?
>
> thanks,
> :-) marc
Might it be because I call xmanager from within a widget procedure?
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