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bug#19482: Changing to big font cause display problem

From: Jan D.
Subject: bug#19482: Changing to big font cause display problem
Date: Sun, 01 Mar 2015 17:18:55 +0100
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:17.0) Gecko/20130620 Thunderbird/17.0.7

martin rudalics skrev 2015-03-01 16:14:
Hi Jan


For my Gtk+ frame I currently get the following values for

(frame-outer-size 762 . 729)
(external-border-size 0 . 0)
(title-height . 25)
(menu-bar-external . t)
(menu-bar-size 752 . 25)
(tool-bar-external . t)
(tool-bar-position . top)
(tool-bar-size 752 . 44)
(frame-inner-size 752 . 630)

Now the sum of inner frame, tool bar, menu bar and title bar heights
gets me 724 (630 + 44 + 25 + 25) which means there are five pixels
missing wrt to the height of the outer frame.  These are obviously from
the bottom of the frame (bottom_off being 5 here) while apparently the
five pixels of the decoration at the top of the frame are not counted in
top_off.  The 5 + 5 missing pixels on the left and right of the frame
come from left_off and right_off, respectively.  The results for Lucid,
Motif and without toolkit frames are similar.

So I'd like to conclude that the size of my decorations are 5 everywhere
but I cannot find the 5 pixels from the decoration at the top.  25
pixels for the title bar sound reasonable, it appears quite as large as
the menu bar.  Any ideas?

We can only calculate the difference between Emacs top and the window manager window top. So the 5 pixels you are looking for are part of title-height. title-height should really be named "whatever the window manager window puts above the top of our Emacs window". It can be title bar, title bar + decoration, or just about anything. We can't know.

        Jan D.

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