GdkEvent has been a "I-can't-believe-this-is-not-OOP" type for ages,
using a union of sub-types. This has always been problematic when it
comes to implementing accessor functions: either you get generic API
that takes a GdkEvent and uses a massive switch() to determine which
event types have the data you're looking for; or you create namespaced
accessors, but break language bindings horribly, as boxed types cannot
have derived types.
The recent conversion of GskRenderNode (which had similar issues) to
GTypeInstance, and the fact that GdkEvent is now a completely opaque
type, provide us with the chance of moving GdkEvent to GTypeInstance,
and have sub-types for GdkEvent.
The change from boxed type to GTypeInstance is pretty small, all things
considered, but ends up cascading to a larger commit, as we still have
backends and code in GTK trying to access GdkEvent structures directly.
Additionally, the naming of the public getter functions requires
renaming all the data structures to conform to the namespace/type-name
pattern.
This removes the use of the context menu and shift group
intents in gdkevents.c. If it turns out to be important,
we need to introduce vfuncs for gdk_event_triggers_context_menu
and gdk_event_matches.
Add all of the keyboard translation results in the key event,
so we can translate the keyboard state at the time the event
is created, and avoid doing state translation at match time.
We actually need to carry two sets of translation results,
since we ignore CapsLock when matching accelerators, in
gdk_event_matches().
At the same time, drop the scancode field - it is only ever
set on win32, and is basically unused in GTK.
Update all callers.
This allows treating drop events like touch events, which GTK groups by
event sequence.
It's a bit ugly that we just case the GdkDrop pointer, but event
sequences are only meant to be unique pointer ids, so it's fine.
Rearrange a few things, and move some booleans
into the Any struct, by using a bitfield there.
Some more cleanup could be done - the flags field
with its PENDING and FLUSHED members appears
entirely unused. Nobody is setting those flags.
Restructure the getters for event fields to
be more targeted at particular event types.
Update all callers, and replace all direct
event struct access with getters.
As a side-effect, this drops some unused getters.
Add private API to construct events. This is a step towards
making events readonly, and not objects anymore.
The constructors here are sufficient to convert the Wayland
backend over. More may be added for other backends as needed.
Open issues:
- history
Don't store coordinates as shorts. Use doubles,
as everywhere else. Also add x, y in addition
to x_root, y_root, and actually return those
in gdk_event_get_coords.
Setting it as qdata on the object doesn't save any memory since we use
the user_data as the event target, which every event has set these days.
This way is also faster since just reffing the object doesn't do any
locking.
The previous attempt at removing configure events entirely
was causing some dialogs not to show up under Wayland.
Presumably due to ordering issues with emitting ::size-change
out of the backend.
Instead, keep configure events in the event queue, but handle
them on the gdk side. This keeps the ordering intact, while
still removing configure events from the api. The dialogs
show up now.
Rename gdkdnd.h to gdkdrag.h, to go along with gdkdrop.h
This commit includes the necessary updates to the X11, Wayland
and Broadway backends. Other backends have to be updated separately.
This is to go along with the newly introduced GdkDrop.
This commit includes the necessary updates to the X11, Wayland
and Broadway backends. Other backends have to be updated separately.
