The current GcalEventWidget implementation is a direct
GtkWidget subclass, which means we have to take care of
all the implementation details such as raising GdkWindows
and managing the drawing all by ourselves.
The event widget, however, can be easily described through
a GtkBuilder file. This would simplify the implementation
and makes us maintain less code.
Fix that by making GcalEventWidget a GtkBin subclass.
This is mainly a copy-paste from an old branch authored
by Matthias Clasen. The code style was updated to match
Calendar's one, and the theming was improved a little bit.
This commit introduces the ability in Edit dialog to
display the currently available alarms, as well as basic
editing of these alarms.
Currently, only removing the alarms and modifying it to
play a sound or not is available. The following up commit
will add the ability to add new alarms.
We don't have to load most of the menus we're currently loading
by using the very handy automatic resource loading.
This patch fixup so the app loads resources automagically.
Instead of throwing it all for GcalWindow to handle,
add a new class called GcalQuickAddPopover that handles
event creation.
Events are always all day when created from the quick
add popover, unless the user wants to change it and click
'Edit Details' button.
In the future, we'll look forward adding natural language
support, so the user can type the times directly from the
entry (like e.g. "soccer at park from 10am to 11:30am").
