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bug#31745: 回复: bug#31745: 回复:回复:Re: 回复:bug#31745: Frame's bug whenwindow

From: martin rudalics
Subject: bug#31745: 回复: bug#31745: 回复:回复:Re: 回复:bug#31745: Frame's bug whenwindow-system
Date: Thu, 28 Jun 2018 14:25:20 +0200

>> (modify-frame-parameters nil '((left . 0) (top . 0) (width . 130) (height . 
> That does nothing, but the following resizes the frame:
> (modify-frame-parameters nil '((left . 0) (top . 0) (width . 100) (height . 
> And has done the right thing:
> (frame-parameter nil 'height) => 48
> (frame-parameter nil 'width) => 100

Looks like the missing link.  If your window manager refuses to resize
the frame, it probably decides that it would not fit on the screen.
Please increase separately from 48 and 100 till you find the
problematic value and compare it against your workspace size.

>> What give (frame-pixel-width) and (frame-pixel-height) for this frame
>> in the bad and good states?
> Bad:
> (frame-pixel-width) => 1849
> (frame-pixel-height) => 1680
> Good:
> (frame-pixel-width) => 1849
> (frame-pixel-height) => 1680

This looks like our bad.  Somehow we decide that the window manager
will comply and set the values we asked for.  Do these values also
occur with emacs -Q followed by

(modify-frame-parameters nil '((left . 0) (top . 0) (width . 130) (height . 

I suppose not since otherwise you would have probably told me so.

>> Can you try with another toolkit or X without any toolkit so we can
>> tell whether this is GTK or window manager specific?
> --with-x-toolkit={none,lucid} both work fine (although you can see the
>    modeline of the frame appear as if it were 80x36, and then it
>    resizes correctly to 130x56).

This implies that the bug is somewhere in our interception of X
messages and letting GTK not see them (otherwise GTK should have
reported an error).  However, it contradicts the assumption that the
window manager refuses to resize our frame since otherwise it would
have done so for the Lucid build too.  Rather it seems that GTK itself
decides that the frame is too large to fit on the screen.  But without
signalling an error?


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