As the properties where set to not explicitly fire ::notify, no
signals where emitted. Let it be not explicit so that
the signal will be emitted on change

This allows the child to be allocated all the width up to a certain
point.

Librem5/libhandy#34

This is needed to let the titlebar handle rendering its background.

This widget present itself as the title bar of a window but is otherwise
a simple bin which can receive any widget.

This coupled with a transparent headerbar background can work around
graphical glitches when animation header bars in a leaflet.

This avoids starting the transition when unfolded, which doesn't make
sense as all children are visible.

Librem5/libhandy#35

Use a GtkSeparator to separate the stack sidebar from the various demo
widgets, use custom styling to make the sidebar not draw its own
separator, and move the start of the header bar and the header bar
separator out of their box and directly into the leaflet.

This allows to have the separators well aligned with no workaround other
than a simple custom style, to have no separator appearing when the
window is folded, and to not trigger the GTK+ bug making titlebar
separators appear black.

This is needed for the serparators to look right.

Always show a close button on the rightmost header bar.

Adrien Plazas authored Aug 27, 2018 and Guido Gunther committed Aug 30, 2018

Set the target and current mode transition positions to the final 1.0
value instead of the initial 0.0 one.

This fixes an inconsistency on initially unfolded leaflets as they would
be drawn in their folded state with no animation triggered to transition
to the final state as the target and the current values were the same.

Hides the last visible child at the end of an animation only if the
leaflet is folded. This avoids children to become incorrectly invisible
at the end of the transition when the leaflet is unfolded.

Librem5/libhandy#32

Previously it was initialized only inside the if branch, and was left
uninitialized left for the rest of the scope.

The variable is unsigned.

and fix the fallout.

This would have caught

    Librem5/libhandy!94

right away.

This avoids falling into the default error case when getting a column's
maximum width.

Let's not live in the past: we want to test for the future. This also
avoid our users to install an old runtime when they may already have
master installed.

HdyColumn was previously missing from libhandy.xml, meaning that
it could not be used or previewed from Glade. This commit adds
HdyColumn to the file.

Fixes Librem5/libhandy#16

When a separator is between two header bars it will take a special
style, better fitting its purpose. This moves the start header bar and
the separator following it into a box so they remain a single entity to
use in size groups, while making the separator a sibling of the header
bar to benefit from this special style.

This reveals the following bug in GTK+:
https://gitlab.gnome.org/GNOME/gtk/issues/1231

DialerButton: free letters

See merge request Librem5/libhandy!83

column: Fix height for width request

See merge request Librem5/libhandy!82

Use the width allocated to the child instead of the width allocated to
the column to compute the height requested by the column.

This avoids children whose height depends on their allocated width to be
cropped at the bottom of the column because it doesn't request enough
height.

Replace phone-dial-symbolic by call-start-symbolic

See merge request Librem5/libhandy!79

Silence all gtk-doc warnings and make sure they don't creep back in

See merge request Librem5/libhandy!78

Drop the custom phone-dial-symbolic icon to use call-start-symbolic,
which available in Adwaita, looks similar enough and is used in
application mockups.