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Printer combo conversion

See merge request !2095

There was still some code expecting to deal with tree
models. Convert it to work with list models.

We don't need it here.

Use a GtkDropDown for the printer combo.

Fix notebook tabs

Closes #2842 and #2841

See merge request !2092

Using the bubble works just fine here, and keeps buttons
in notebook tabs working without side-effects.

Fixes: #2841

Make gtk_file_chooser_get_filter work for portal case (issue #1820, master)

Closes #1820

See merge request !2070

Shift-Tabbing was getting stuck in GtkSearchEntry and
GtkPasswordEntry, since they grab the focus to a child
of theirs. Copy the same fix that we are already using
in GtkEntry.

Fixes: #2842

Remove a few instances of GTK+ in the docs.

button: Center images

See merge request !2090

Editable label

See merge request !2081

If we leave the valign to be the default fill, then
the images pick up baseline alignment from the environment,
which can occasionally lead to misplaced -/+ icons in
spinbuttons, for example in the "Page Setup" tab of
the print dialog.

Use GtkListView and GtkEditableLabel here.

This is more in line with the expected behavior for
editable lists.

inspector: Don't set style classes on app widgets

See merge request !2089

Due to a mixup, the inspector was setting .dim-label on
widgets that get unmapped, instead of the labels representing
them in the object tree.

dropdown: Style fixups

See merge request !2088

Make the dropdown popover have a .menu style class,
and add padding to the rows in the popover. Also,
make the popover left-aligned with the button.

Final frame clock work

See merge request !2087

Yariv Barkan authored Jun 10, 2020 and Alexander Larsson committed Jun 15, 2020

Fix scheduling of the frame clock when we don't receive "frame drawn"
messages from the compositor.

If we received "frame drawn" events recently, then the "smooth frame
time" would be in sync with the vsync time. When we don't receive frame
drawn events, the "smooth frame time" is simply incremented by constant
multiples of the refresh interval. In both cases we can use this smooth
time as the basis for scheduling the next clock cycle.

By only using the "smooth frame time" as a basis we also benefit from
more consistent scheduling cadence. If, for example, we got "frame
drawn" events, then didn't receive them for a few frames, we would still
be in sync when we start receiving these events again.

Yariv Barkan authored Jun 10, 2020 and Alexander Larsson committed Jun 15, 2020

When an animation is started while the application is idle, that often
happens as a result of some external event. This can be an input event,
an expired timer, data arriving over the network etc. The result is that
the first animation clock cycle could be scheduled at some random time,
as opposed to follow up cycles which are usually scheduled right after a
vsync.

Since the frame time we report to the application is correlated to the
time when the frame clock was scheduled to run, this can result in
uneven times reported in the first few animation frames. In order to fix
that, we measure the phase of the first clock cycle - i.e. the offset
between the first cycle and the preceding vsync. Once we start receiving
"frame drawn" signals, the cadence of the frame clock scheduling becomes
tied to the vsync. In order to maintain the regularity of the reported
frame times, we adjust subsequent reported frame times with the
aforementioned phase.

Fix various compiler warnings with the 64bit mingw build

See merge request !2020

spinbutton: Bring back auto-sizing

See merge request !2085

64 bit is more common now and also tests more things because
sizeof(glong) != sizeof(gpointer)

Use better matching format modifiers/specifiers, initialise some things
which in theory wont be written to because of getters using g_return_if_fail(),
a cast, and gsize as input for malloc because gsize!=glong on 64bit Windows.

Fix the lpr print backend build (redundant-decls)

See merge request !2084

We lost this when GtkSpinButton was first ported
to the new editable regime, and then the GtkBoxLayout.

Bring it back, but without text measurement, by overriding
width-chars for the GtkText inside, and only do it if
GtkSpinButton::width-chars is unset (ie -1).

Also adjust the documentation slightly to point out
how auto-sizing can be turned off.

Class and instance _init() functions are already declared by
G_DEFINE_DYNAMIC_TYPE ().

widget-factory: Make the print dialog more functional

See merge request !2083

Allow opening the papersize dialog.