Pan/zoom not working with numlock

[ma-laforge]

I actually thought Immerse did not support pan/zoom until I saw Tim's YouTube video.

The problem is that GtkUtilities.jl is not properly masking for modifier keys that are considered "significant".

I had to replace:

keymatch(event, keydesc) = event.keyval == keydesc[1] && event.state == UInt32(keydesc[2])

With the following:

function gtk_accelerator_get_default_mod_mask()
	ccall((:gtk_accelerator_get_default_mod_mask,Gtk.libgtk),Cint,())
end

keymatch(event, keydesc) = event.keyval == keydesc[1] &&
	(event.state&gtk_accelerator_get_default_mod_mask()) == UInt32(keydesc[2])

Now, I can zoom even if my NumLock key is on... but similar masking would also be necessary on the mouse operations.

Comments

• I did not make a PR because my guess is that accelerator_get_default_mod_mask() should be in Gtk.jl - and someone that better understands the Gtk.jl naming convention should probably be adding it.
• Note that gtk_accelerator_set_default_mod_mask() is only supposed to be set at "application startup" - which I believe means it could potentially be stored as a const while "loading" Gtk.jl (Not sure how this would work out, though).

[ma-laforge]

Oh, mabe I should include a reference:
https://developer.gnome.org/gtk3/stable/checklist-modifiers.html