| PLOT() function...which WINDOW() to plot to...? [message #81352] |
Wed, 12 September 2012 06:56  |
![Paul Van Delst[1] is currently offline](theme/default/images/xoffline.png.pagespeed.ic.XRkd1fkXye.png "Paul Van Delst[1] is currently offline")
Paul Van Delst[1]
Messages: 1157
Registered: April 2002
|
Senior Member |
|
|
Hello,
I have some code that does this:
; Set the graphics buffering
buffer = KEYWORD_SET(png)
then, inside some loops (director and file lists), a window is created
like so:
w = WINDOW( $
WINDOW_TITLE = rts_file_list[i], $
DIMENSIONS = [800,w_ysize], $
BUFFER = buffer )
and then inside an addition loop (data items), a plot is created like so:
index++
pn = PLOT( $
channel_index, new_data, $
XTITLE=xtitle, $
TITLE = item_name[j], $
LAYOUT = [ n_col, n_row, index ], $
NAME = legend_name[0], $
COLOR = 'red', $
THICK = 2, $
CURRENT = w )
Note in the last command the keyword assignment "CURRENT = w".
And then finally,
IF ( buffer ) THEN $
w.SAVE, dir_list[n] + PATH_SEP() + $
FILE_BASENAME(file_root,".bin") + ".png", $
HEIGHT=w_ysize
Note that the main procedure keyword "png" is what determines whether or
not the plots got to a window on screen, or to a buffer. And, if they go
to a buffer, those plots are then saved as a png file.
I have noticed two things:
1) If I have existing graphics windows on screen (say from a bunch of
previous plots) and I run my program to create more onscreen plots, then
if I click on any of the *other* windows, my current plotting run
starts plotting to *that* window, not the one defined by the graphics id
variable "w".
2) If I set the "png" keyword to plot to the buffer so as to create
output files (and thus no onscreen output), if I again click on *any*
existing windows on screen, it becomes the target of the plotting
commands and my new plots get overwritten on anything existing onscreen.
Needless to say the final png output is also screwy.
Now, checking the PLOT() documentation it does not mention at all that
the CURRENT keyword is anything but a binary keyword (unlike the
OVERPLOT keyword where you can specify graphics references).
Fair enough. But, then, how does one set the current plotting window
such that inadvertent, or purposeful, clicks on some other existing
window doesn't cause the plotting to transfer to that window?
I want to create a window, and have everything plot in that window (be
it onscreen or in buffer) regardless of what other graphics windows I
have onscreen that I happen to be looking at and click on.
I presume there is some magical combination of keywords that will do that?
Thanks for any info.
cheers,
paulv
|
|
|
|
|
|
|
|
| Re: PLOT() function...which WINDOW() to plot to...? [message #81438 is a reply to message #81352] |
Wed, 12 September 2012 14:31  |
Paul Van Delst[1]
Messages: 1157
Registered: April 2002
|
Senior Member |
|
|
Yay! Thanks.
What's the schedule for v8.2.2 release?
cheers,
paulv
On 09/12/12 15:47, Chris Torrence wrote:
> Hi Paul,
>
> I just changed the CURRENT keyword for IDL 8.2.2, so you can pass in
> a graphic reference, just like you were trying to do in your original
> example. It will automatically make that window be current and ensure
> that your new graphics goes into that window.
>
> Cheers, Chris ExelisVIS
|
|
|
|
| Re: PLOT() function...which WINDOW() to plot to...? [message #81441 is a reply to message #81352] |
Wed, 12 September 2012 13:31 |
chris_torrence@NOSPAM
Messages: 528
Registered: March 2007
|
Senior Member |
|
|
On Wednesday, September 12, 2012 1:53:12 PM UTC-6, David Fanning wrote:
> Chris Torrence writes:
>
>
>
>> I just changed the CURRENT keyword for IDL 8.2.2, so you can
>
>> pass in a graphic reference.
>
>
>
> Any chance we can sneak this into IDL 8.2.1 so we can
>
> have it this year? :-)
>
>
>
> Cheers,
>
>
>
> David
>
It's too late for 8.2.1, but I can email you the code if you really want the changes. However, that won't do any good for anyone else...
-Chris
|
|
|
|
|
|
|
|
| Re: PLOT() function...which WINDOW() to plot to...? [message #81444 is a reply to message #81352] |
Wed, 12 September 2012 11:59 |
Paul Van Delst[1]
Messages: 1157
Registered: April 2002
|
Senior Member |
|
|
On 09/12/12 11:58, Paul van Delst wrote:
> Hello,
>
> On 09/12/12 11:07, David Fanning wrote:
>> Paul van Delst writes:
>>
>>> I want to create a window, and have everything plot in that window (be
>>> it onscreen or in buffer) regardless of what other graphics windows I
>>> have onscreen that I happen to be looking at and click on.
>>>
>>> I presume there is some magical combination of keywords that will do
>>> that?
>>
>> I think you have to write your loop like this, using
>> the SetCurrent method on the window you want to draw
>> into:
>>
>> w.SetCurrent
>> index++
>> pn = PLOT( $
> [snip]
>> CURRENT = 1 )
>
> Yeah, I did look at that method (and implemented it as you say) but it
> does not solve the basic problem.
And it introduces a new one if I set the output to go to buffer:
IDL> display_diffs, names=['gfortran 4.4.6 PROD', 'baseline'], /png
..etc..
% Attempt to call undefined method: 'GRAPHICSBUFFER::SETCURRENT'.
% Execution halted at: DISPLAY_RESULT_DIFFERENCES 103
CRTM/branches/RB-2.1/src/Build/test/forward/display_diffs.pr o
% $MAIN$
So if you set the BUFFER keyword in the WINDOW() call, the method
SetCurrent becomes invalid for the graphics id.
So now I have to a
IF ( ~buffer ) THEN w.SetCurrent
before each FG call.
Wha...? I gotta be doing something wrong here.
cheers,
paulv
|
|
|
|
| Re: PLOT() function...which WINDOW() to plot to...? [message #81447 is a reply to message #81352] |
Wed, 12 September 2012 09:14 |
David Fanning
Messages: 11724
Registered: August 2001
|
Senior Member |
|
|
Paul van Delst writes:
> I want to create a window, and have everything plot in that window (be
> it onscreen or in buffer) regardless of what other graphics windows I
> have onscreen that I happen to be looking at and click on.
>
> I presume there is some magical combination of keywords that will do that?
I think you have to write your loop like this, using
the SetCurrent method on the window you want to draw
into:
w.SetCurrent
index++
pn = PLOT( $
channel_index, new_data, $
XTITLE=xtitle, $
TITLE = item_name[j], $
LAYOUT = [ n_col, n_row, index ], $
NAME = legend_name[0], $
COLOR = 'red', $
THICK = 2, $
CURRENT = 1 )
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
|
|
|
|
| Re: PLOT() function...which WINDOW() to plot to...? [message #81449 is a reply to message #81352] |
Wed, 12 September 2012 08:58 |
Paul Van Delst[1]
Messages: 1157
Registered: April 2002
|
Senior Member |
|
|
Hello,
On 09/12/12 11:07, David Fanning wrote:
> Paul van Delst writes:
>
>> I want to create a window, and have everything plot in that window (be
>> it onscreen or in buffer) regardless of what other graphics windows I
>> have onscreen that I happen to be looking at and click on.
>>
>> I presume there is some magical combination of keywords that will do that?
>
> I think you have to write your loop like this, using
> the SetCurrent method on the window you want to draw
> into:
>
> w.SetCurrent
> index++
> pn = PLOT( $
[snip]
> CURRENT = 1 )
Yeah, I did look at that method (and implemented it as you say) but it
does not solve the basic problem.
If I click on a different window in that infinitesimal amount of time
between the execution of
w.SetCurrent
and
pn = PLOT(...)
the same problem crops up since "w" is no longer the current window.
It's typical that, while plot#n is being written to screen, I'm looking
at plot#(n-1). As soon as I click on that window and give it focus,
everything goes pear-shaped. You're effectively forced to do non-IDL-y
stuff while the program is (slowly) plotting all the FG graphics.
Additionally, it adds the burden of having to put a "w.SetCurrent"
before every single FG call! And that *still* may not be efficacious
depending on how "click-y" one is with existing windows.
It seems to be such a gaping hole in the basic design of these graphics
features that I am sure I am still missing something.
- With DG clicking on windows was a completely separate operation from
setting the current graphics window in a program via WSET.
- With FG, the two operations are intertwined. Clicking on *ANY*
graphics window has exactly the same effect as executing the SetCurrent
method... even if the program is running, and even if the program has
been directed to send all graphics to a buffer rather than onscreen.
Unless there is something in the documentation that I'm missing (or just
misunderstanding), I regard this as a fundamental flaw: there is no way
for a programmer to guarantee the code will run the way it was intended
(i.e. *always* plot to *this* window).
Anyhoo... I guess I'll bring the donuts to the next IDL support group
meeting...
cheers,
paulv
p.s. Argh!
|
|
|
|
| Re: PLOT() function...which WINDOW() to plot to...? [message #81450 is a reply to message #81352] |
Wed, 12 September 2012 08:07 |
David Fanning
Messages: 11724
Registered: August 2001
|
Senior Member |
|
|
Paul van Delst writes:
> I want to create a window, and have everything plot in that window (be
> it onscreen or in buffer) regardless of what other graphics windows I
> have onscreen that I happen to be looking at and click on.
>
> I presume there is some magical combination of keywords that will do that?
I think you have to write your loop like this, using
the SetCurrent method on the window you want to draw
into:
w.SetCurrent
index++
pn = PLOT( $
channel_index, new_data, $
XTITLE=xtitle, $
TITLE = item_name[j], $
LAYOUT = [ n_col, n_row, index ], $
NAME = legend_name[0], $
COLOR = 'red', $
THICK = 2, $
CURRENT = 1 )
Cheers,
David
--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thui. ("Perhaps thou speakest truth.")
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
