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>
Until now, every event has had a particular target. We're about to simplify
key event delivery to match the first matching filter, so there is no
longer a global meaning to the tag argument to Source.Event.
Add fields to filters to specify their target tags.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Now that widgets by convention may be focused by issuing FocusCmd
directly, remove the now redundant Focus methods on Clickable, Editor,
Selectable.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
We're about to replace the per-widget Focus methods with the client
executing FocusCmd themselves. To ensure the soft keyboard is not
forgotten, ask to show it automatically on focus.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
With the introduction of filters, it is now possible to have one tag per
widget by convention. Note that gestures still have their own tags, for
disambiguation.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Processing one event at a time allows a widget to execute commands after
the event that triggered it, instead of after all matching events.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Change the semantics of commands to execute immediately. In cases where
execution of a command introduces a inconsistency, freeze event routing
and defer the command as well as queued events to the next frame.
Rename Source.Queue to Source.Execute to better fit the new command
semantics.
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>
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>
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>
This change gets rid of the event.Queue interface by replacing it with
input.Source values. Source provides the interface to Router necessary
to implement interface widgets.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
We're about to replace the interface Queue with a concrete input.Source.
This change renames the field accordingly.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
We're about to make Context.Queue a concrete type, and this change
replaces code that relies on Queue being an interface.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
In the early days of Gio, FrameEvent was part of package app. It was
moved to package system to enable layout.NewContext be a convenient
short-hand for constructing a layout.
However, it seems the better design to leave FrameEvent (and Insets) in
package app, and move layout.NewContext there as well. More importantly,
the move allows us to replace the event.Queue interface with a concrete
type.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit fixes a visual misalignment in scrollbars resulting from subtle differences
in the semantics of layout.Stack and layout.Background. layout.Stack will position expanded
children according to their minimum constraint regardless of their returned size, whereas
layout.Background uses their returned size. This means that layout.Expanded widgets returning
zero dimensions are positioned correctly, but they break when converted to use layout.Background.
This commit fixes the problem by returning correct dimensions from the scrollbar track.
Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
This matches the convention of other state update methods. While here, remove useless
dimensions return. The update doesn't draw anything, so there are no dimensions involved.
Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
It's relatively common to create a widget and then add a background to
it. Using layout.Stack causes bunch of heap allocs, which we would like
to avoid whenever we can.
This adds layout.Background which is roughly the same as:
layout.Stack{Alignment: layout.C}.Layout(gtx,
layout.Expanded(background),
layout.Stacked(widget)
)
goos: windows
goarch: amd64
pkg: gioui.org/layout
cpu: AMD Ryzen Threadripper 2950X 16-Core Processor
│ Stack │ Background │
│ sec/op │ sec/op vs base │
*-32 203.80n ± 1% 83.36n ± 3% -59.09% (p=0.000 n=10)
│ Stack │ Background │
│ B/op │ B/op vs base │
*-32 48.00 ± 0% 0.00 ± 0% -100.00% (p=0.000 n=10)
│ Stack │ Background │
│ allocs/op │ allocs/op vs base │
*-32 2.000 ± 0% 0.000 ± 0% -100.00% (p=0.000 n=10)
Signed-off-by: Egon Elbre <egonelbre@gmail.com>
This commit introduces Update(gtx) functions for both Selectable and Editor, allowing their
state to be updated explicitly prior to layout. This completes the transition that allows all
Gio widgets to have their state updated ahead-of-time, ensuring that there is zero frame lag
between an input event and the widget response to that event.
Signed-off-by: Chris Waldon <christopher.waldon.dev@gmail.com>
Selectable was using a key event filter copied directly from editor.go,
but it didn't actually process all those keys. Update the filter to only
ask for the keys that Selectable actually uses.
Signed-off-by: Larry Clapp <larry@theclapp.org>
This change replace the global rand use with a local source, to avoid
the recently deprecated global rand.Seed function. At the same time, the
time-dependent seeds are replaced with static numbers to ensure
reproducible benchmarks numbers.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
This change allows users of Float to determine its state before Layout
by calling Update.
While here, remove the value transformation represented by the min, max,
invert parameters; they're too many arguments for a computation that
may as well be done by the user.
Remove Float.Pos; it is better to compute its value from the dimensions
returned by Float.Layout.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Similar to an earlier change for other widgets, this change separate
Enum state changes for access earlier than Layout.
Signed-off-by: Elias Naur <mail@eliasnaur.com>
Elias Naur