Remove all the old 2.x and 3.x version annotations.
GTK+ 4 is a new start, and from the perspective of a
GTK+ 4 developer all these APIs have been around since
the beginning.
This patch makes that work using 1 of 2 options:
1. Add all missing enums to the switch statement
or
2. Cast the switch argument to a uint to avoid having to do that (mostly
for GdkEventType).
I even found a bug while doing that: clearing a GtkImage with a surface
did not notify thae surface property.
The reason for enabling this flag even though it is tedious at times is
that it is very useful when adding values to an enum, because it makes
GTK immediately warn about all the switch statements where this enum is
relevant.
And I expect changes to enums to be frequent during the GTK4 development
cycle.
In these situations we must perform the "is it claimed" check before removing
the (touch)point, as doing so when the gesture is empty will be too late if
the gesture actually claimed input.
Those are now needless and wrong, as we get guarantees that handled
events will contain widget-relative coordinates. A side effect is
that these events are very possibly not explicitly sent to the
GdkWindow that implementations expect, any extra checks performed
through gtk_gesture_set_window() will be wrong, so the function has
been dropped entirely.
These complicate a lot of GdkWindow internals to implement features
that not a lot of apps use, and will be better achieved using gsk.
So, we just drop it all.
Always have Since: annotations at the very bottom, use the correct
ClassName::signal-name/ClassName:property-name syntax, fix a few typos
in type names, wrong function names, non-existing type names, etc.
These will be mutually exclusive with touch events, so it won't
be possible to trigger gestures through mixed input and whatnot.
The accounting of touchpad events is slightly different, there
will be a single internal PointData struct, stored in the hashtable
with the NULL event sequence/key (same than pointer events in
this regard), just that the events stored will be GdkEventTouchpad*,
so will hold information about all fingers at once.
But this difference is just internal, the GtkGesture API doesn't
make explicit assumptions about the number of points (the closest
to a per-point query API is gtk_gesture_get_sequences()). All
signals emitted just contain the last changed GdkEventSequence,
and API takes GdkEventSequences, so everything is consistent with
sequence=NULL for touchpad events.
Along the code, we're basically asking for 1) the total count of
touchpoints, and 2) the number of active touchpoints (not denied
nor ended).
Wrap both usecases into a _gtk_gesture_get_n_physical_touchpoints(),
and replace all occurrences.
The gestures that don't want touchpad gesture events are majority,
even those that want such events will only listen to subsets (eg.
pinch, swipe,...).
So it makes sense to ignore touchpad events by default, and let
subclasses opt those in.
Add some docs/example about the possible event handling ordering issues
that may appear on GtkGesture::begin between multiple gesture groups.
Mostly relevant for state changes.
If the event triggers GtkGesture::begin, and the handler ends up resetting
the gesture (say, due to taking a grab somewhere else within the handler),
still take the event as "managed", as it actually triggered recognition,
even if just to end abruptly.
https://bugzilla.gnome.org/show_bug.cgi?id=731711
It might happen that a gesture claims a sequence before any other gesture
in its group even handled a single event from that sequence. In that case,
ensure the state is set accordingly right when the sequence is handled in
those.
The "group" gesture testcase has been updated to observe this behavior.
Event controllers now auto-attach, and the GtkCapturePhase only determines
when are events dispatched, but all controllers are managed by the widget wrt
grabs.
All callers have been updated.
