| Re: How to erase a (function graphics) plot. [message #79452] |
Mon, 05 March 2012 09:02  |
Mark Piper
Messages: 198
Registered: December 2009
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Senior Member |
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On 3/5/2012 5:53 AM, alx wrote:
> On 5 mar, 06:27, wlandsman<wlands...@gmail.com> wrote:
>> I am building a widget application with a widget_window for displaying function graphics plots. By default, function graphics does not erase the old plot in the same window.
>>
>> p1 = plot(indgen(10))
>> p2 = plot( sin(indgen(10),/current)
>>
>> There is a delete method
>>
>> p1.delete
>>
>> but that doesn't delete the axes, which still get jumbled together. There is a close method but that destroys the window, and I'd like to keep reusing the widget_window.
>>
>> Right now I am erasing the plot by loading a white IMAGE() but I hope there is a better way.
>>
>> Thanks, --Wayne
>>
>>
>
> p1.delete looks like to be equivalent to p1.setdata(0), i.e. erasing
> only the data. If you want to erase the entire plot, you can erases
> the axes by doing:
> IDL> p1['AXIS0'].delete ;erase X axis
> IDL> p1['AXIS1'].delete ;erase Y axis
> alx.
In 8.2, there will be an ::Erase method for NG, analogous to ERASE for
DG. (In 8.0 & 8.1, I've "erased" plots as Alain has.)
mp
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| Re: How to erase a (function graphics) plot. [message #79455 is a reply to message #79452] |
Mon, 05 March 2012 04:53  |
lecacheux.alain
Messages: 325
Registered: January 2008
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Senior Member |
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On 5 mar, 06:27, wlandsman <wlands...@gmail.com> wrote:
> I am building a widget application with a widget_window for displaying function graphics plots. By default, function graphics does not erase the old plot in the same window.
>
> p1 = plot(indgen(10))
> p2 = plot( sin(indgen(10),/current)
>
> There is a delete method
>
> p1.delete
>
> but that doesn't delete the axes, which still get jumbled together. There is a close method but that destroys the window, and I'd like to keep reusing the widget_window.
>
> Right now I am erasing the plot by loading a white IMAGE() but I hope there is a better way.
>
> Thanks, --Wayne
>
>
p1.delete looks like to be equivalent to p1.setdata(0), i.e. erasing
only the data. If you want to erase the entire plot, you can erases
the axes by doing:
IDL> p1['AXIS0'].delete ;erase X axis
IDL> p1['AXIS1'].delete ;erase Y axis
alx.
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| Re: How to erase a (function graphics) plot. [message #88542 is a reply to message #79452] |
Sun, 11 May 2014 12:01 |
Bob[4]
Messages: 24
Registered: April 2009
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Junior Member |
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On Monday, March 5, 2012 10:02:57 AM UTC-7, Mark Piper wrote:
> On 3/5/2012 5:53 AM, alx wrote:
>
>> On 5 mar, 06:27, wlandsman<wlands...@gmail.com> wrote:
>
>>> I am building a widget application with a widget_window for displaying function graphics plots. By default, function graphics does not erase the old plot in the same window.
>
>>>
>
>>> p1 = plot(indgen(10))
>
>>> p2 = plot( sin(indgen(10),/current)
>
>>>
>
>>> There is a delete method
>
>>>
>
>>> p1.delete
>
>>>
>
>>> but that doesn't delete the axes, which still get jumbled together. There is a close method but that destroys the window, and I'd like to keep reusing the widget_window.
>
>>>
>
>>> Right now I am erasing the plot by loading a white IMAGE() but I hope there is a better way.
>
>>>
>
>>> Thanks, --Wayne
>
>>>
>
>>>
>
>>
>
>> p1.delete looks like to be equivalent to p1.setdata(0), i.e. erasing
>
>> only the data. If you want to erase the entire plot, you can erases
>
>> the axes by doing:
>
>> IDL> p1['AXIS0'].delete ;erase X axis
>
>> IDL> p1['AXIS1'].delete ;erase Y axis
>
>> alx.
>
>
>
> In 8.2, there will be an ::Erase method for NG, analogous to ERASE for
>
> DG. (In 8.0 & 8.1, I've "erased" plots as Alain has.)
>
>
>
> mp
Did this happen? I don't see it in 8.3.
An erase method would be very useful. I find that when I rerun a script that greats a (function graphics) plot it always creates a new window, which steals the focus (and pops up the new window in the wrong place). This drives me crazy. It would be much better if I could erase the old one and reuse the same window. Then my window layout would stay put and focus would stay in the editing window.
Am I missing something?
Bob
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| Re: How to erase a (function graphics) plot. [message #88544 is a reply to message #88543] |
Mon, 12 May 2014 03:13 |
andeh
Messages: 23
Registered: April 2011
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Junior Member |
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On Monday, 12 May 2014 02:19:10 UTC+1, Chris Torrence wrote:
>>
>
>> Did this happen? I don't see it in 8.3.
>
>>
>
>>
>
>>
>
>> An erase method would be very useful. I find that when I rerun a script that greats a (function graphics) plot it always creates a new window, which steals the focus (and pops up the new window in the wrong place). This drives me crazy. It would be much better if I could erase the old one and reuse the same window. Then my window layout would stay put and focus would stay in the editing window.
>
>>
>
>>
>
>>
>
>> Am I missing something?
>
>>
>
>>
>
>>
>
>> Bob
>
>
>
> Yep...
>
>
>
> http://www.exelisvis.com/docs/Erase_Method.html
>
>
>
> Looks like it got missed in the docs for each graphics function, but it's there!
>
> -Chris
I have a function that works most of the time to deal with this. You pass it to the CURRENT keyword in your fg plotting command.
;+
; NAME:
; current = FG_CURRENT( id )
;
;
; PURPOSE:
; Clear an object graphics window if it exists, so that re-running
; code doesn't created another set of plots in a new window. The
; function is designed to be passed directly to a plotting command
; via the CURRENT keyword.
;
; INPUT:
; id: Object reference for a function graphics plot.
;
;
; OUTPUT:
; Flag to be passed to plotting object. If the output is 1, then
; the object has been successfully cleared and selected so that
; the /CURRENT keyword should be correct.
;
;
; EXAMPLE USE:
;
; ;; Create the same plot twice.
; plot_object_0 = PLOT( [0,5] )
; plot_object_0 = PLOT( [5,0] )
;
; ;; Now use FG_CURRENT to clear instead of creating a new one.
; plot_object_1 = PLOT( [0,5], CURRENT=FG_CURRENT(plot_object_1) )
; plot_object_1 = PLOT( [5,0], CURRENT=FG_CURRENT(plot_object_1) )
;
;
;
; HISTORY:
; 17 FEB 2014 (AJAS) Created.
;
;-
FUNCTION FG_CURRENT, id
;; If there's an error, return current=0.
CATCH, Error_status
IF Error_status NE 0 THEN BEGIN
PRINT, 'FG_CURRENT: ', !ERROR_STATE.MSG
CATCH, /CANCEL
RETURN, 0b
ENDIF
;; Unless the current window is appropriately set,
;; we don't flag it.
current = 0b
;; Check that we are dealing with an object reference.
IF SIZE(/TYPE,id) EQ 11 THEN BEGIN
HELP, id, OUTPUT=help_id
;; If it looks like a plot, then erase the contents and select.
;; This is not an exhaustive check.
IF (STRSPLIT(/EXTRACT,help_id))[1] NE 'OBJREF' THEN BEGIN
wid = id.WINDOW
wid.ERASE
wid.SELECT
current = 1b
ENDIF
ENDIF
RETURN, current
END
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| Re: How to erase a (function graphics) plot. [message #88548 is a reply to message #88547] |
Mon, 12 May 2014 08:41 |
chris_torrence@NOSPAM
Messages: 528
Registered: March 2007
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Senior Member |
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On Monday, May 12, 2014 8:49:02 AM UTC-6, bobnn...@gmail.com wrote:
> On Sunday, May 11, 2014 7:19:10 PM UTC-6, Chris Torrence wrote:
>
>>>
>
>>
>
>>> Did this happen? I don't see it in 8.3.
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>> An erase method would be very useful. I find that when I rerun a script that greats a (function graphics) plot it always creates a new window, which steals the focus (and pops up the new window in the wrong place). This drives me crazy. It would be much better if I could erase the old one and reuse the same window. Then my window layout would stay put and focus would stay in the editing window.
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>> Am I missing something?
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>>
>
>>
>
>>> Bob
>
>>
>
>>
>
>>
>
>> Yep...
>
>>
>
>>
>
>>
>
>> http://www.exelisvis.com/docs/Erase_Method.html
>
>>
>
>>
>
>>
>
>> Looks like it got missed in the docs for each graphics function, but it's there!
>
>>
>
>> -Chris
>
>
>
> Thanks, Chris. This works, except that it doesn't erase the plot (it is still in the window). But plotting a new plot to current does erase it and plots the new one. Is this the intended behavior (I would have thought that erase would erase)?
>
>
>
> I'm using IDL 8.3 on Mac OS X 10.9.2 (note that I use the X11 backend since I run it from X11 emacs).
>
>
>
> Bob
Yep, I noticed that also. I thought it was just a quirk on my Mac, but I can reproduce it on Windows as well... I'll go ahead and fix it for the next service pack.
Thanks!
-Chris
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