Windows: Pressure sensitivity does only work after second start

[andreasb242]

On the first start pressure sensitivity is not available, after restart it's working.
As this is probably a GTK issue there will probably be no real fix, instead create a workaround.

[andreasb242]

After testing I found out:
start Xournal++, do not touch with the pen
start again, touch with the Pen. Does not work
start the 3rd time: working

So it don't matter how many times it's started, it needs pen contact and then a restart. Strange, and really hard to find a workaround.

[andreasb242]

GTK Bug https://gitlab.gnome.org/GNOME/gtk/issues/1549

[cbm755]

Also, just to note that xournal does this too (presumably b/c its underlying GTK bug).

[andreasb242]

Yes, this is a GTK Bug, I found it already, but had no time to fix it.

 andreasb242 @andreasb242 commented 1 day ago

I got a hint on my other Merge Request: https://gitlab.gnome.org/GNOME/gtk/blob/gtk-3-24/gdk/win32/gdkdevicemanager-win32.c#L1065

The axes count is initialized dynamically on init. My guess is now, that this count is not there, if the pen has not yet touched the screen. I didn't check this yet, but it would produce exactly the current behavior.

I could confirm this behavior, but I didn't get my mac pull merged yet, so I wont work on two GTK pulls at the same time.

[jason076]

I have a Surface Pro4 and my Stylus is always recognized as a normal mouse. I have tried the workarounds from above, but they dont't work. I have the Xournal++ Version 1.0.12

[LittleHuba]

@jason076
Please try #1151.
You will have to compile by hand though.

[jason076]

@jason076
Please try #1151.
You will have to compile by hand though.

@LittleHuba
I have compiled and tried it, but it does not recognizes any input devices. The stylus is still working like a normal mouse.