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Last Post 25 Feb 2012 06:39 PM by  anon
Display nothing in widget_window?
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anon



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25 Feb 2012 06:39 PM
    Hi guys: I use IDL 8.1. I run the fellowing code and get nothing display in wedget window: wBase = WIDGET_BASE(/COLUMN,MAP=0) wDraw = WIDGET_WINDOW(wBase, XSIZE=400, YSIZE=400, RENDERER=1, UNAME='DRAWAREA') WIDGET_CONTROL, wBase, /REALIZE ; Retrieve the newly-created Window object. WIDGET_CONTROL, wDraw, GET_VALUE=oWin oWin.erase oWin.select p = PLOT(/TEST, /CURRENT, /FILL_BACKGROUND) WIDGET_CONTROL, wBase, MAP=1, /SHOW When I remove 'oWin.erase', display is successful. So, what's the problem, thanks! dave

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    08 Mar 2012 01:13 PM
    When using Object Graphics for the widget draw, the following command returns an object reference to the draw window: WIDGET_CONTROL, my_drawwidget, GET_VALUE=oWin where oWin is a window object. So, as a window GR object you can then use the ERASE procedure method erases the entire contents of the window. Therefore, if you use it the window will look empty. Cheers, fernando
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