combo_box_popdown() currently skips popping down our menu if it is NULL.
But the required call to this at end-of-life was in destroy(), by which
point dispose() already NULLed the menu, so Menu::popdown() would never
run, even if it should. Fix this by trying popdown() earlier in unmap().
Also, add a converse assurance that we don’t popup() while not mapped.
Even once we remove all the now-pointless NULL checks, destroy() was the
wrong place to call combo_box_popdown(), and unmap() is the right place.
gtk_init() removed its support for supporting arguments, so we ought to do
likewise for Windows, which actually defines items that call gtk_init()
the old way (and also get rid of argument support in those functions,
since the direction is to not support them).
https://bugzilla.gnome.org/show_bug.cgi?id=773299
Commit fdc0c6426b removed the appears-as-
list style property, & hence the ability to put the ComboBox into list
mode – but it left behind a pile of hijinks that were only used in said
mode & so were now doing absolutely nothing. This commit deletes those.
While doing that, I got carried away…so this also stops pointlessly type
checking popup_widget, as that can never be anything but a GtkTreeMenu.
It still checks for NULL everywhere, which shouldn’t be needed, but (A)
this commit is already too big, & (B) simply removing such checks where
they _seem_ unnecessary causes bad times. I’ll puzzle through that later
Commit fdc0c6426b for removing (partly!)
appears-as-list also deleted the code that propagated wrap-width to the
TreeMenu and thus put us into “grid mode”. This restores that code.
And as Benjamin noted, calling check_appearance() here is wrong, so bye.
We want to simplify our initialization code and remove all commandline
argument handling from it. The first stop for this is to reduce the
number of gtk_init variants we have.
This is how windows are meant to be hidden as per the wayland
protocol, there's no need to destroy the xdg_surface and other
interfaces.
Also, rename gdk_wayland_window_hide_surface() to clear_surface(),
as that's what it does.
https://bugzilla.gnome.org/show_bug.cgi?id=773686
i.e. when wrap-width > 0. This was only being done for non-grid cases.
So, ComboBoxes in grid mode did not indicate their selection when popped
up and required users to keynav from ‘nothing’ (at the top-left) to the
item they wanted to select. By selecting the active item in advance, now
it’s highlighted & acts as the starting point for keynav around the grid
