The airbrush tool has only one button, and the button mapping combo box
does not work.
We should not bail out if the widget has been removed, that means that
the stylus does not support the second button.
Check upfront the number of buttons to know if the top button parameter
is available.
https://bugzilla.gnome.org/show_bug.cgi?id=746263
We currently install two signal handlers for button-press-event and
selection-changed. As the former also calls the latter, the two interact
in non-obvious ways that can lead to two alerts being played at the same
time under certain circumstances.
Avoid this problem by setting activate-on-single-click on the tree view
and listening to the row-activated signal to drive previews and model
changes.
https://bugzilla.gnome.org/show_bug.cgi?id=671446
The language input chooser is being created and destroyed every time
it is opened and closed. This is noticeably slow and is hardly
necessary as the values it contains should not change.
To fix this, these changes reuse the same instance of the input chooser
(by hiding and showing it) instead of renewing it.
The input chooser is also now shown using gtk_dialog_run to avoid having
it destroyed from the default delete event.
These changes prevent warnings when unreferencing the default input
source, locale and back rows which are never instanced by some locales
(and thus null).
The language input chooser is being leaked. The reason for the leak
is a "circular reference": the input chooser keeps a GtkBuilder
instance that gets destroyed when the chooser is, itself, destroyed.
However, the input chooser is never destroyed because the GtkBuilder
instance keeps a reference to it.
These changes dismiss the GtkBuilder once it is no longer needed in the
input chooser which fixes the leak.
When switching from a particular IPv4 or IPv6 "addresses" method to
another, make sure that "address", "DNS" and "routes" are applied or
ignored depending on that method's capabilities.
For example, when switching from manual to automatic IPv4 "addresses"
method, we need to make sure that the old IP address, gateway, etc.
aren't actually used in the new setting.
https://bugzilla.gnome.org/show_bug.cgi?id=734337
