[wx-dev] [ wxwindows-Bugs-1933147 ] Command Event sent twice

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Bugs item #1933147, was opened at 2008-04-03 09:43
Message generated for change (Comment added) made by roebling
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Benjamin I. Williams (biwillia76)
Assigned to: Nobody/Anonymous (nobody)
Summary: Command Event sent twice

Initial Comment:

Hi,

I noticed the following new behavior recently and wanted to check if this is or isn't a bug.  This behavior can be found in the 2.8 branch.  I haven't yet tested it with trunk.

I had a spurious evt.Skip() in a command handler.  For a long time, wxWidgets 2.8.7 included, the command was only fired once.   With the Skip(), now the command is fired twice.  Here's a sample of what I'm talking about.


    void OnOpenURL(wxCommandEvent& evt)
    {
        wxMessageBox(wxT("Command Clicked"));
        evt.Skip();
    }

The message box will appear twice.

I've attached a full sample which demonstrates this problem.

All the best,
Ben


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>Comment By: Robert Roebling (roebling)
Date: 2008-04-22 18:56

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Sending out the event twice is clearly a bug. Simply generating a
backtrace when the event is fired the second time should reveal where it
comes from and probably also explain why.

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Comment By: AYF (az911)
Date: 2008-04-03 10:00

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This looks like my post here:
https://sourceforge.net/tracker/index.php?func=detail&aid=1929968&group_id=9863&atid=109863
I didn't think to check all command events, but   	 
wxEVT_COMMAND_MENU_SELECTED fires twice if skipped. And I have tested this
with the trunk on wxMSW.

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Comment By: Stefan Csomor (csomor)
Date: 2008-04-03 09:54

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Hi Ben

at least on mac this is the behavior because events get re-emitted by the
OS at different levels if the event has not been handled, and the
notHandledErr corresponds to calling evt.Skip()

Best,

Stefan

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