Top Document: Motif FAQ (Part 6 of 9) Previous Document: 156) TOPIC: DRAWING AREA WIDGET Next Document: 158) How can I know when a DrawingArea has been resized? It See reader questions & answers on this topic! - Help others by sharing your knowledge any other, come to that). I want to send an expose event so that it will redraw itself. [Last modified: Nov 97] Answer: Use the Xlib call XClearArea(XtDisplay(w), XtWindow(w), 0, 0, 0, 0, True) This clears the widget's window and generates an expose event in doing so. The widgets expose action will then redraw it. This uses a round trip request. An alternative, without the round trip is from orca!mesa!rthomson@uunet.uu.net (Rich Thomson): Widget da; XmDrawingAreaCallbackStruct da_struct; da_struct.reason = XmCR_EXPOSE; da_struct.event = (XEvent *) NULL; da_struct.window = XtWindow(da); XtCallCallbacks(da, XmNexposeCallback, (XtPointer) &da_struct); Thanks to rand@ling.umu.se (Ola Andersson) for a correction to the above. User Contributions:Top Document: Motif FAQ (Part 6 of 9) Previous Document: 156) TOPIC: DRAWING AREA WIDGET Next Document: 158) How can I know when a DrawingArea has been resized? It Part1 - Part2 - Part3 - Part4 - Part5 - Part6 - Part7 - Part8 - Part9 - Single Page [ Usenet FAQs | Web FAQs | Documents | RFC Index ] Send corrections/additions to the FAQ Maintainer: kenton@rahul.net (Ken Lee)
Last Update March 27 2014 @ 02:11 PM
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