Struct gtk4::PadController
source · #[repr(transparent)]pub struct PadController { /* private fields */ }
Expand description
PadController
is an event controller for the pads found in drawing
tablets.
Pads are the collection of buttons and tactile sensors often found around the stylus-sensitive area.
These buttons and sensors have no implicit meaning, and by default they
perform no action. PadController
is provided to map those to
gio::Action
objects, thus letting the application give them a more
semantic meaning.
Buttons and sensors are not constrained to triggering a single action,
some GDK_SOURCE_TABLET_PAD
devices feature multiple “modes”. All these
input elements have one current mode, which may determine the final action
being triggered.
Pad devices often divide buttons and sensors into groups. All elements
in a group share the same current mode, but different groups may have
different modes. See Gdk::DevicePad::get_n_groups()
and
Gdk::DevicePad::get_group_n_modes()
.
Each of the actions that a given button/strip/ring performs for a given mode
is defined by a PadActionEntry
. It contains an action name that
will be looked up in the given gio::ActionGroup
and activated whenever
the specified input element and mode are triggered.
A simple example of PadController
usage: Assigning button 1 in all
modes and pad devices to an “invert-selection” action:
⚠️ The following code is in c ⚠️
GtkPadActionEntry *pad_actions[] = {
{ GTK_PAD_ACTION_BUTTON, 1, -1, "Invert selection", "pad-actions.invert-selection" },
…
};
…
action_group = g_simple_action_group_new ();
action = g_simple_action_new ("pad-actions.invert-selection", NULL);
g_signal_connect (action, "activate", on_invert_selection_activated, NULL);
g_action_map_add_action (G_ACTION_MAP (action_group), action);
…
pad_controller = gtk_pad_controller_new (action_group, NULL);
The actions belonging to rings/strips will be activated with a parameter
of type G_VARIANT_TYPE_DOUBLE
bearing the value of the given axis, it
is required that those are made stateful and accepting this GVariantType
.
Properties
action-group
Readable | Writeable | Construct Only
pad
Readable | Writeable | Construct Only
EventController
name
The name for this controller, typically used for debugging purposes.
Readable | Writeable
propagation-limit
The limit for which events this controller will handle.
Readable | Writeable
propagation-phase
The propagation phase at which this controller will handle events.
Readable | Writeable
widget
The widget receiving the GdkEvents
that the controller will handle.
Readable
Implements
Implementations§
source§impl PadController
impl PadController
sourcepub fn new(group: &impl IsA<ActionGroup>, pad: Option<&Device>) -> PadController
pub fn new(group: &impl IsA<ActionGroup>, pad: Option<&Device>) -> PadController
Creates a new PadController
that will associate events from @pad to
actions.
A None
pad may be provided so the controller manages all pad devices
generically, it is discouraged to mix PadController
objects with
None
and non-None
@pad argument on the same toplevel window, as execution
order is not guaranteed.
The PadController
is created with no mapped actions. In order to
map pad events to actions, use set_action_entries()
or set_action()
.
Be aware that pad events will only be delivered to Window
s, so adding
a pad controller to any other type of widget will not have an effect.
group
GActionGroup
to trigger actions from
pad
A GDK_SOURCE_TABLET_PAD
device, or None
to handle all pads
Returns
A newly created PadController
sourcepub fn builder() -> PadControllerBuilder
pub fn builder() -> PadControllerBuilder
Creates a new builder-pattern struct instance to construct PadController
objects.
This method returns an instance of PadControllerBuilder
which can be used to create PadController
objects.
sourcepub fn set_action(
&self,
type_: PadActionType,
index: i32,
mode: i32,
label: &str,
action_name: &str
)
pub fn set_action( &self, type_: PadActionType, index: i32, mode: i32, label: &str, action_name: &str )
Adds an individual action to @self.
This action will only be activated if the given button/ring/strip number in @index is interacted while the current mode is @mode. -1 may be used for simple cases, so the action is triggered on all modes.
The given @label should be considered user-visible, so internationalization rules apply. Some windowing systems may be able to use those for user feedback.
type_
the type of pad feature that will trigger this action
index
the 0-indexed button/ring/strip number that will trigger this action
mode
the mode that will trigger this action, or -1 for all modes.
label
Human readable description of this action, this string should be deemed user-visible.
action_name
action name that will be activated in the GActionGroup
sourcepub fn set_action_entries(&self, entries: &[PadActionEntry])
pub fn set_action_entries(&self, entries: &[PadActionEntry])
A convenience function to add a group of action entries on @self.
See PadActionEntry
and set_action()
.
entries
the action entries to set on @self
pub fn action_group(&self) -> Option<ActionGroup>
pub fn pad(&self) -> Option<Device>
Trait Implementations§
source§impl Clone for PadController
impl Clone for PadController
source§impl Debug for PadController
impl Debug for PadController
source§impl Default for PadController
impl Default for PadController
source§impl Display for PadController
impl Display for PadController
source§impl HasParamSpec for PadController
impl HasParamSpec for PadController
type ParamSpec = ParamSpecObject
§type SetValue = PadController
type SetValue = PadController
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, PadController>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for PadController
impl Hash for PadController
source§impl Ord for PadController
impl Ord for PadController
source§impl ParentClassIs for PadController
impl ParentClassIs for PadController
type Parent = EventController
source§impl<OT: ObjectType> PartialEq<OT> for PadController
impl<OT: ObjectType> PartialEq<OT> for PadController
source§impl<OT: ObjectType> PartialOrd<OT> for PadController
impl<OT: ObjectType> PartialOrd<OT> for PadController
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl StaticType for PadController
impl StaticType for PadController
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for PadController
impl IsA<EventController> for PadController
Auto Trait Implementations§
impl RefUnwindSafe for PadController
impl !Send for PadController
impl !Sync for PadController
impl Unpin for PadController
impl UnwindSafe for PadController
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fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere F: Fn(&T, &ParamSpec) + 'static,
notify
signal of the object. Read moresource§unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec),
unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerIdwhere F: Fn(&T, &ParamSpec),
notify
signal of the object. Read more