jlunny@TWG.COM ("John Lunny") (12/20/89)
hi, at the outset i would like to warn you that i am new at this X programming thing. i'm trying to port an X Lib application to Motif. I decided to go with the XmDrawingArea Widget, so that i could keep my old X Lib calls. so i create a drawing area widget via XmCreateDrawingArea. However, the X Lib calls require a window with which to draw into. i thought this could easily be the result of a XtWindow() call on the widget returned from XmCreateDrawingArea. however, when i try to create the graphics context with this window id, it comes back with a badDrawable error. in a nutshell.. drawingarea = XmCreateDrawingArea (...); XtManagechild (drawingarea); ... w = XtWindow (drawingarea); XCreateGC (dpy, w, ...); any ideas??? thanks in advance. jlunny@twg.com
converse@EXPO.LCS.MIT.EDU (Donna Converse) (12/20/89)
> i'm trying to port an X Lib application to Motif. > ... > when i try to create the graphics > context with this window id, it comes back with a badDrawable > error. > drawingarea = XmCreateDrawingArea (...); > XtManagechild (drawingarea); > ... Call XtRealizeWidget (see section 2.5 of the Intrinsics) with an argument of your toplevel widget. Windows of widgets are created when a widget is realized, not when a widget is created. Calling XCreateGC with a window ID of 0 (no window) would give the type of error that you describe. > w = XtWindow (drawingarea); > XCreateGC (dpy, w, ...); Donna Converse