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[Tcl-bugs] [ tktoolkit-Bugs-220776 ] update idletasks does not update repacked widgets on Windows
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From: SourceForge.net <no...@so...> - 2004-04-05 22:02:30
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Bugs item #220776, was opened at 2000-11-01 00:53 Message generated for change (Comment added) made by jaspert You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=112997&aid=220776&group_id=12997 Category: 69. Events Group: obsolete: 8.0.3 Status: Open Resolution: None Priority: 6 Submitted By: Brent B. Welch (welch) Assigned to: Jeffrey Hobbs (hobbs) Summary: update idletasks does not update repacked widgets on Windows Initial Comment: OriginalBugID: 674 Bug Version: 8.0.3 SubmitDate: '1998-09-02' LastModified: '2000-04-09' Severity: LOW Status: Assigned Submitter: lfb ChangedBy: hobbs OS: All Windows OSVersion: NA Machine: NA FixedInVersion: NA button .foo -text "Hello World!" pack .foo -expand yes pack propagate . 0 . configure -width 200 -height 200 foreach anchor {center n ne e se s sw w nw center } { pack .foo -anchor $anchor # update the display update idletasks # wait half a sec after 500 } Notice how the update idletasks does not remove the image of the button after it has been repacked. Ick. Reported on c.l.t by da...@gt... (John F. Davis) (lfb) This is a code fragment taken from Brent's book! -- The work-around is to use 'update' instead of 'update idle'. The problem is that the redraw of the of the button is occurring within an idle callback, but evidently the redraw of the underlying frame isn't. Problem still in 8.2. -- 12/14/1999 hobbs ---------------------------------------------------------------------- Comment By: Jasper Taylor (jaspert) Date: 2004-04-05 12:30 Message: Logged In: YES user_id=456242 I have a problem which might be related to this (happens under WinXP but 98 and Unix are OK). An application doing a long calculation uses a message box and 'update idletasks' to keep the user informed of its progress. But if you raise another window, then the application's main window, the messages no longer get updated, giving the user the impression the application has hung. ---------------------------------------------------------------------- Comment By: Vince Darley (vincentdarley) Date: 2002-08-28 12:49 Message: Logged In: YES user_id=32170 Problem still in 8.4b3. Similar problem seems to occur on tkaqua (MacOS X), but I believe for different reasons. ---------------------------------------------------------------------- Comment By: Vince Darley (vincentdarley) Date: 2002-07-02 15:55 Message: Logged In: YES user_id=32170 It would be good to fix this annoying behaviour before Tk 8.4 goes final. "update" is sometimes not a good workaround, because all sorts of new events start to appear! ---------------------------------------------------------------------- Comment By: Nobody/Anonymous (nobody) Date: 2001-09-27 19:45 Message: Logged In: NO Here's another simple manifestation of a similar problem: >wish label .l -bg red frame .w -width 250 -height 20 -bg blue pack .l -side left -fill none pack .w -side right update pack propagate . 0 update % repeat these lines to show the bug .l configure -text "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" update .l configure -text hi ; update idletasks ; after 1000 Occurs with Tk8.4a4 on Win2000sp2. Lots of ugly 'AAAA' left behind when the label redraws. This behaviour causes some unfortunate problems in some applications I use which need to display lots of messages to the user (in a 'status bar' type thing). If the messages come too fast, garbage results, and 'update' is not a satisfactory solution... ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=112997&aid=220776&group_id=12997 |