Hi. I know this has been discussed before, and I am hoping I can convince those it may concern to change the current behaviour of switching to override redirect mode if _MOTIF_WM_INFO is not set.
If there is an authorative source on the issue, it would be the Motif Reference Manual (ISBN: 1-56592-654-4), available for download at http://www.ist.co.uk/motif/motif_refs.html Here is the relevant section (from Motif Functions and Macros): ---- START QUOTE ---- Name XmIsMotifWMRunning – check whether the Motif Window Manager (mwm) is running. Synopsis Boolean XmIsMotifWMRunning (Widget shell) Inputs shell Specifies the shell widget whose screen is queried. Returns True if mwm is running or False otherwise. Description XmIsMotifWMRunning() checks for the presence of the _MOTIF_WM_INFO property on the root window of the screen of the specified shell to determine whether the Motif Window Manager (mwm) is running on the screen. Usage mwm defines additional types of communication between itself and client pro- grams. This communication is optional, so an application should not depend on the communication or the presence of mwm for any functionality. XmIsMo- tifWMRunning() allows an application to check if mwm is running and act accordingly. See Also mwm(4). ---- END QUOTE ---- According to this, _MOTIF_WM_INFO should NOT be set in other window managers. _MOTIF_WM_INFO is not described itself, nor even mentioned in the rest of the document. Even if you do not consider this book authorative, the fact remains that the function exists, and uses _MOTIF_WM_INFO to check if MWM is running. Also, window managers handle input focus. Many users (e.g. me) would therefore have the borderless mode simply fail rather than switching to override redirect mode. I would imagine most users don't want to change behaviour by setting borderLess to true, only appearance. Any thoughts? Cheers, Ole Christian Tvedt -- I am not on the list. Please CC me on response.
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