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This PR allows widgets to inform the runtime about whether they have handled an event or not.
Specifically, a new
event::Status
enum has been introduced. It has two variants:Ignored
andCaptured
, andWidget::on_event
now must return one of them:Captured
if the event was handled by the implementor.Ignored
otherwise.As a consequence,
UserInterface::update
has been changed to return anevent::Status
for every processedEvent
. This should help users that are integratingiced
with their own custom event loop to implement proper event propagation (see #408 and #455).Furthermore,
subscription::Recipe
iniced_native
now takes a stream of(Event, event::Status)
as input, effectively allowing subscriptions to discard events that have already been processed by a widget. This is specially useful for implementing global hotkeys (e.g. if aTextInput
is focused, hotkeys will not trigger when typing on it).Fixes #408.
Closes #455.