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Re: Legend for plot [message #67981 is a reply to message #67979]

Tue, 15 September 2009 17:58

b.a
Messages: 26
Registered: July 2009

Junior Member

Thanks for your solution. But I couldn't get it to work. What happens
now, is that I get 3 separate window: one for my GUI (a simple tlb and
draw widget), one for the legend (but the legend doesn't appear in it)
and one for my plots.

Here is the code that I tried:
----------------------------------------------------
pro demolegend

x1 = [1,2,3,4,5]
y1 = [4,5,6,7,8]

x2 = [2,3,4,4.5,5]
y2 = [4,5,6,7,8]

tlb = Widget_Base(column=1, XSIZE=350, YSIZE= 400,$
XOFFSET=250, YOFFSET= 300)

dr_window = WIDGET_DRAW(tlb, UVALUE= 'draw', $
XSIZE= 348, YSIZE=200, GRAPHICS_LEVEL = 2)

mywindow = OBJ_NEW('IDLgrWindow')
myview = OBJ_NEW('IDLgrView')

itemNameArr = ['One', 'two']

myLegend = OBJ_NEW('IDLgrLegend', itemNameArr)
myview->Add, mylegend

WIDGET_CONTROL, dr_window, GET_VALUE = mywindow
;mywindow->Draw, myview

Widget_Control, tlb, /realize

plot, y2, x2, COLOR= 40, BACKGROUND= 255
oplot, y1, x1, COLOR= 80

Xmanager, 'demolegend', tlb

end
------------------------------------------------------------ ----------

as you see, I have commented this line:
;mywindow->Draw, myview

If I don't do that, it gives error:
Unable to invoke method on NULL object reference: <OBJREF
(<NullObject>)>.
ehich I think means that mywindow is a null object.

Can you think of any solution for this?

Thank you

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[Message index]

		Re: Legend for plot By: b.a on Tue, 15 September 2009 22:49
		Re: Legend for plot By: penteado on Tue, 15 September 2009 21:40
		Re: Legend for plot By: penteado on Tue, 15 September 2009 21:19
		Re: Legend for plot By: b.a on Tue, 15 September 2009 17:58
		Re: Legend for plot By: penteado on Fri, 11 September 2009 08:42
		Re: Legend for plot By: penteado on Wed, 16 September 2009 19:57

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