Existing default was requesting a window of size 1024×768 at position
(200,100). While it may seem a reasonable default on nowadays displays,
it was not on some intermediate size displays which are considered HiPPI
anyway.
Taking my personal example, my screen is 2560×1440, which is considered
HiPPI by GNOME 3 with a scale ratio of ×2. As a consequence, setting a
size of 1024×768 was actually creating a window of 2048×1536, which is
already higher than the screen. Worse, gtk_window_resize() resize the
window without taking into consideration the title bar, which in my case
added 74 pixels, so GIMP window started at 1610 pixels of height, much
bigger than my screen size, hence unusable (and for some reason, with
the title bar out of the screen so without knowing Super+click shortcut
to move or Super+Up to maximize, people would have a hard time to resize
or close GIMP).
This issue only happens at the first launch of GIMP, when no user
sessionrc exists yet. Once you resize yourself the main window, then
restart GIMP, it is fine (as next times, it will use the user's
sessionrc). Yet it is already a bad first impression.
For temporary workaround, let's use a smaller 800×600 defaults (which
will actually span on 1600×1200 pixels + decoration size on scale ratio
×2).
Still I don't like using arbitrary numbers for window size default.
As we see here, it can end up into all sort of weird result. Even more
with all the scale ratio business which didn't exist back in GTK+2.
Instead, the defaults should have no size, and our code should just
resize to whatever makes the most sense on the current display, which I
believe should likely be maximized. Unfortunately I have a hard time
with gtk_window_maximize() which doesn't seem to do anything at all
(does GNOME ignore _NET_WM_STATE_MAXIMIZE_* hints when requested by
applications maybe?). So until we find the right system, let's go with
this lower window size defaults at least.
Add a default toolrc file, installed in the sysconf dir, with a
more minimalistic tool layout using groups, inspired by Photoshop
(not identical, though, don't kill me! :)
It must not be a boolean but a `feature` option, with `auto` by default.
`auto` value mean enabled for macOS and Win32, and disabled for other
cases. This default logics disappeared in the meson build.
Also the mypaint-brushes package is a mandatory dependency, which must
always be checked. Absence is fatale.
Finally properly set the MYPAINT_BRUSHES_DIR macro depending on the
proper relocatable case.
Some gimprc properties' default values depend on the machine where
"make dist" in run. We had an ugly hack in place to force
(num-processors 1) in the installed system gimprc and its manpage, but
were still leaking "tile-cache-size" and "mypaint-brush-path".
The files are generated by the hidden options --dump-gimprc-system
and --dump-gimprc-manpage which exist only for this purpose.
In gimpconfig-dump.c, special case the three properties in
dump_gimprc_system() and dump_gimprc_manpage() to output constant
default values for "num-processors" and "tile-cache-size" and
output @mypaint_brushes_dir@ in "mypaint-brush-path" which can
be replaced at configure time.
Also introduce etc/gimprc.in so @mypaint_brushes_dir@ can actually be
substituted for the installed system gimprc.
Since we have many themes now, this new name better indicates that it
is meant to follow your desktop theme settings.
Also it will likely not remain the default theme.
Don't hardcode modifier masks in the wheel and keyboard input
controllers. Instead, hardcode accelerator strings and get the right
modifier mask from gtk_accelerator_parse() at runtime.
This turns e.g. "<Shift><Primary>" into Shift+Cmd on OS X and into
Shift+Ctrl on X11 and Windows.
Also rename the events accordingly and change the event names in the
default controllerrc.
Unrelated: reorder the actions so the ones with less modifiers are
listed first, and change the order of action matching to match the
actions with most modifiers (the last ones) first.
Jehan