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>
We're about the refactor this quite subtle code, and the optimization
doesn't seem to carry its weight in complexity.
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>
Instead of having to supply the predicates for event filtering at the
time of layout, the new Filter type allows widgets to filter at the time
of calling Source.Events. There is then only the need for a single input
op type, in package event.
Filters most importantly allow the use of one tag for several event types,
and we can define that a widget w has &w as its primary tag, by convention.
This allows the replacement of per-widget Focus methods with direct uses
of FocusCmd{&w}, and the later addition of Source.Focused(&w) queries.
Note that the TestCursor test needed restructuring to avoid its use of
InputOps.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur