Red Hat Bugzilla – Bug 442769
Double-Click does not work with Metacity Window Manager and Motif with certain WM preference settings
Last modified: 2014-06-18 05:10:08 EDT
Description of problem: Double-Click mouse clicks do not work in Motif-based applications under GNOME/Metacity when the "Select Windows when the mouse moves over them" preference is enabled. The bug is reproducible with a simple Xt/Motif program available at the link below. Version-Release number of selected component (if applicable): metacity-2.16.0-10.el5 How reproducible: always Steps to Reproduce: 1. Launch test program 2. Single Click on displayed button and observer terminal output 3. Double Click on displayed button and observe that terminal still displays the words "Single click" 4. Perform same tests after disabling "Select Windows when the mouse moves over them" and observe the double-clicking on the button produces the words "Double click" in the terminal window. Additional info: Test program is available at http://www.ecs.csun.edu/~renzo/cs585/Heller.book/Volume6/ch11/multi_click.c Compile as: gcc -o mc -c multi_click.c -lXm -lXt -lX11 -L/usr/X11R6/lib Everything works perfectly when running with click to focus. From Soren -- Some preliminary results: - This bug is caused by spurious crossing events that causes Xt to think that the pointer left the button between the two clicks. - My guess is that this is related to metacity having a passive grab on the window in focus follows mouse mode. This is a pick-your-poison situation. Metacity can either have an XGrabButton on the window, or not. If it does, then crossing events will be generated, and we will see this bug, which is essentially gnome bug 102209 [1]. If it doesn't, then it has no way of intercepting clicks on the window which means that it can't focus or raise the window in response to clicks. The reason it works in click-to-focus is that in that case metacity drops the XGrabButton when the window is focused. We could do the same in sloppy mode, but then a user could alt-tab focus some other window and then have no way to focus the window again, except mousing out and back in. See gnome bug 115072 [2]. I believe any window manager will have the same problem, and that the only real fix is to add an extension to X that would allow XGrabButton without clicks causing crossing events. References: [1] http://bugzilla.gnome.org/show_bug.cgi?id=115072 [2] http://bugzilla.gnome.org/show_bug.cgi?id=102209 --------------- +++ This bug was initially created as a clone of Bug #184143 +++
Created attachment 302646 [details] patch
This request was evaluated by Red Hat Product Management for inclusion in a Red Hat Enterprise Linux maintenance release. Product Management has requested further review of this request by Red Hat Engineering, for potential inclusion in a Red Hat Enterprise Linux Update release for currently deployed products. This request is not yet committed for inclusion in an Update release.
2.16.12EL should fix it
An advisory has been issued which should help the problem described in this bug report. This report is therefore being closed with a resolution of ERRATA. For more information on therefore solution and/or where to find the updated files, please follow the link below. You may reopen this bug report if the solution does not work for you. http://rhn.redhat.com/errata/RHBA-2009-0130.html