The empty key.Filter.Name now means matching every key name. This is a
replacement for the previous special case where the top-level key.InputOp
handler would get all unmatched events.
Add special case for system events such as focus switch shortcuts.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Replace the key.Filter.Target field with a Focus field that matches only
of the specified tag has focus. This has the advantage of simpler event
delivery and for lower latency in delivering key events to new handlers.
For example, consider a UI where a button is activated by a key press,
which is turn displays a dialog with another button activated by the
same key. This change allows two button press(+releases) in the same frame
to arrive at the intended targets: one key press(+release) for each
button.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
If the client asks for the focus to be set to a tag, allow it. There is a
check at the end of Router.Frame that clears the focus if the tag turns
out to fail the requirements (visible and has asked for FocusEvents).
The change simplifies the logic for determining whether a command can
be executed immediately.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Refactor the pointer and key filter unions into the handler state struct.
This is a preparation for replacing calls to filtersMatches with queries
to the filter union.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
We're about to need per-handler state related to neither pointer nor
key input. This change merges the pointer and key handler state into one
state struct, tracked in the Router.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This change defers event routing from the time the event is queued until
the time Events is called. This allows a future change to execute
commands immediately and to react to event order changes during a frame.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Replace the per-event event queues with a single queue of events, each
marked with the target tag. This change is a prerequisite for lazy event
delivery.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Refactor delivery of reset events to be resolved and delivered as part of
Source.Events. This is a preparation for changing event handling to be
lazy.
Reset events are delivered to event handlers that are either new or
haven't been active in the previous frame for a particular event type
(pointer or key events), to ensure the handler state is reset.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
We're about to replace key.InputOp with a filter; this change separates
the input hint into its own operation.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Modeling focus change as an operation is awkward, because focus changes
logically happen during event processing, not layout. In particular, you
want to apply focus changes even if a widget is subsequently never laid
out.
Now that input.Source is concrete, it's much more straightforward to
offer focus changes as a command which can be queued through the
Source. A future change may similarly offer a command for directional
focus changes.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur