Struct gtk::EventControllerScroll
source · [−]#[repr(transparent)]pub struct EventControllerScroll { /* private fields */ }
v3_24
only.Expand description
EventControllerScroll
is an event controller meant to handle
scroll events from mice and touchpads. It is capable of handling
both discrete and continuous scroll events, abstracting them both
on the signal::EventControllerScroll::scroll
signal (deltas in the
discrete case are multiples of 1).
In the case of continuous scroll events, EventControllerScroll
encloses all signal::EventControllerScroll::scroll
events between two
signal::EventControllerScroll::scroll-begin
and signal::EventControllerScroll::scroll-end
signals.
The behavior of the event controller can be modified by the
flags given at creation time, or modified at a later point through
set_flags()
(e.g. because the scrolling
conditions of the widget changed).
The controller can be set up to emit motion for either/both vertical
and horizontal scroll events through EventControllerScrollFlags::VERTICAL
,
EventControllerScrollFlags::HORIZONTAL
and GTK_EVENT_CONTROLLER_SCROLL_BOTH
.
If any axis is disabled, the respective signal::EventControllerScroll::scroll
delta will be 0. Vertical scroll events will be translated to horizontal
motion for the devices incapable of horizontal scrolling.
The event controller can also be forced to emit discrete events on all devices
through EventControllerScrollFlags::DISCRETE
. This can be used to implement
discrete actions triggered through scroll events (e.g. switching across
combobox options).
The EventControllerScrollFlags::KINETIC
flag toggles the emission of the
signal::EventControllerScroll::decelerate
signal, emitted at the end of scrolling
with two X/Y velocity arguments that are consistent with the motion that
was received.
This object was added in 3.24.
Implements
Implementations
sourceimpl EventControllerScroll
impl EventControllerScroll
sourcepub fn new(
widget: &impl IsA<Widget>,
flags: EventControllerScrollFlags
) -> EventControllerScroll
pub fn new(
widget: &impl IsA<Widget>,
flags: EventControllerScrollFlags
) -> EventControllerScroll
Creates a new event controller that will handle scroll events
for the given widget
.
widget
a Widget
flags
behavior flags
Returns
a new EventControllerScroll
sourcepub fn flags(&self) -> EventControllerScrollFlags
pub fn flags(&self) -> EventControllerScrollFlags
sourcepub fn set_flags(&self, flags: EventControllerScrollFlags)
pub fn set_flags(&self, flags: EventControllerScrollFlags)
sourcepub fn connect_decelerate<F: Fn(&Self, f64, f64) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_decelerate<F: Fn(&Self, f64, f64) + 'static>(
&self,
f: F
) -> SignalHandlerId
Emitted after scroll is finished if the EventControllerScrollFlags::KINETIC
flag is set. vel_x
and vel_y
express the initial velocity that was
imprinted by the scroll events. vel_x
and vel_y
are expressed in
pixels/ms.
vel_x
X velocity
vel_y
Y velocity
sourcepub fn connect_scroll<F: Fn(&Self, f64, f64) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_scroll<F: Fn(&Self, f64, f64) + 'static>(
&self,
f: F
) -> SignalHandlerId
sourcepub fn connect_scroll_begin<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_scroll_begin<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId
Signals that a new scrolling operation has begun. It will only be emitted on devices capable of it.
sourcepub fn connect_scroll_end<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId
pub fn connect_scroll_end<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId
Signals that a new scrolling operation has finished. It will only be emitted on devices capable of it.
pub fn connect_flags_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId
Trait Implementations
sourceimpl Clone for EventControllerScroll
impl Clone for EventControllerScroll
sourceimpl Debug for EventControllerScroll
impl Debug for EventControllerScroll
sourceimpl Display for EventControllerScroll
impl Display for EventControllerScroll
sourceimpl Hash for EventControllerScroll
impl Hash for EventControllerScroll
sourceimpl Ord for EventControllerScroll
impl Ord for EventControllerScroll
1.21.0 · sourceconst fn max(self, other: Self) -> Self
const fn max(self, other: Self) -> Self
1.21.0 · sourceconst fn min(self, other: Self) -> Self
const fn min(self, other: Self) -> Self
1.50.0 · sourceconst fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: PartialOrd<Self>,
const fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: PartialOrd<Self>,
sourceimpl ParentClassIs for EventControllerScroll
impl ParentClassIs for EventControllerScroll
type Parent = EventController
sourceimpl<OT: ObjectType> PartialEq<OT> for EventControllerScroll
impl<OT: ObjectType> PartialEq<OT> for EventControllerScroll
sourceimpl<OT: ObjectType> PartialOrd<OT> for EventControllerScroll
impl<OT: ObjectType> PartialOrd<OT> for EventControllerScroll
sourcefn partial_cmp(&self, other: &OT) -> Option<Ordering>
fn partial_cmp(&self, other: &OT) -> Option<Ordering>
1.0.0 · sourceconst fn le(&self, other: &Rhs) -> bool
const fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresourceimpl StaticType for EventControllerScroll
impl StaticType for EventControllerScroll
sourcefn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for EventControllerScroll
impl IsA<EventController> for EventControllerScroll
Auto Trait Implementations
impl RefUnwindSafe for EventControllerScroll
impl !Send for EventControllerScroll
impl !Sync for EventControllerScroll
impl Unpin for EventControllerScroll
impl UnwindSafe for EventControllerScroll
Blanket Implementations
sourceimpl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
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T: ObjectType,
impl<T> Cast for Twhere
T: ObjectType,
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T: ObjectType,
Self: IsA<T>,
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U: IsClass + ParentClassIs,
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T: ObjectSubclass,
<U as ParentClassIs>::Parent: IsSubclassable<T>,
fn parent_instance_init<T>(instance: &mut InitializingObject<T>)where
T: ObjectSubclass,
<U as ParentClassIs>::Parent: IsSubclassable<T>,
sourceimpl<T> ObjectExt for Twhere
T: ObjectType,
impl<T> ObjectExt for Twhere
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U: StaticType,
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sourcefn set_properties_from_value(&self, property_values: &[(&str, Value)])
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ParamSpec
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sourceunsafe fn set_qdata<QD>(&self, key: Quark, value: QD)where
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QD: 'static,
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QD: 'static,
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QD: 'static,
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key
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QD: 'static,
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. Read moresourceunsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>where
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QD: 'static,
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. Read moresourcefn block_signal(&self, handler_id: &SignalHandlerId)
fn block_signal(&self, handler_id: &SignalHandlerId)
sourcefn unblock_signal(&self, handler_id: &SignalHandlerId)
fn unblock_signal(&self, handler_id: &SignalHandlerId)
sourcefn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)
fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)
sourcefn stop_signal_emission_by_name(&self, signal_name: &str)
fn stop_signal_emission_by_name(&self, signal_name: &str)
sourcefn connect<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
fn connect<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
signal_name
on this object. Read moresourcefn connect_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
fn connect_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
signal_id
on this object. Read moresourcefn connect_local<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
fn connect_local<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
signal_name
on this object. Read moresourcefn connect_local_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
fn connect_local_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: 'static + Fn(&[Value]) -> Option<Value>,
signal_id
on this object. Read moresourceunsafe fn connect_unsafe<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
unsafe fn connect_unsafe<F>(
&self,
signal_name: &str,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
signal_name
on this object. Read moresourceunsafe fn connect_unsafe_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
unsafe fn connect_unsafe_id<F>(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
callback: F
) -> SignalHandlerIdwhere
F: Fn(&[Value]) -> Option<Value>,
signal_id
on this object. Read moresourcefn connect_closure(
&self,
signal_name: &str,
after: bool,
closure: RustClosure
) -> SignalHandlerId
fn connect_closure(
&self,
signal_name: &str,
after: bool,
closure: RustClosure
) -> SignalHandlerId
signal_name
on this object. Read moresourcefn connect_closure_id(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
closure: RustClosure
) -> SignalHandlerId
fn connect_closure_id(
&self,
signal_id: SignalId,
details: Option<Quark>,
after: bool,
closure: RustClosure
) -> SignalHandlerId
signal_id
on this object. Read moresourcefn watch_closure(&self, closure: &impl AsRef<Closure>)
fn watch_closure(&self, closure: &impl AsRef<Closure>)
closure
to the lifetime of the object. When
the object’s reference count drops to zero, the closure will be
invalidated. An invalidated closure will ignore any calls to
invoke_with_values
, or
invoke
when using Rust closures. Read moresourcefn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>
fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>
Self::emit
but takes Value
for the arguments.sourcefn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value]
) -> Option<Value>
fn emit_by_name_with_values(
&self,
signal_name: &str,
args: &[Value]
) -> Option<Value>
sourcefn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_by_name_with_details<R>(
&self,
signal_name: &str,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_by_name_with_details_and_values(
&self,
signal_name: &str,
details: Quark,
args: &[Value]
) -> Option<Value>
fn emit_by_name_with_details_and_values(
&self,
signal_name: &str,
details: Quark,
args: &[Value]
) -> Option<Value>
sourcefn emit_with_details<R>(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
fn emit_with_details<R>(
&self,
signal_id: SignalId,
details: Quark,
args: &[&dyn ToValue]
) -> Rwhere
R: TryFromClosureReturnValue,
sourcefn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Option<Value>
fn emit_with_details_and_values(
&self,
signal_id: SignalId,
details: Quark,
args: &[Value]
) -> Option<Value>
sourcefn disconnect(&self, handler_id: SignalHandlerId)
fn disconnect(&self, handler_id: SignalHandlerId)
sourcefn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
notify
signal of the object. Read moresourcefn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec),
fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec),
notify
signal of the object. Read moresourceunsafe 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