pub struct Scrollable { /* private fields */ }
Expand description
Scrollable
is an interface for widgets with native scrolling ability.
To implement this interface you should override the
hadjustment
and
vadjustment
properties.
§Creating a scrollable widget
All scrollable widgets should do the following.
-
When a parent widget sets the scrollable child widget’s adjustments, the widget should connect to the
value-changed
signal. The child widget should then populate the adjustments’ properties as soon as possible, which usually means queueing an allocation right away and populating the properties in theWidgetImpl::size_allocate()
implementation. -
Because its preferred size is the size for a fully expanded widget, the scrollable widget must be able to cope with underallocations. This means that it must accept any value passed to its
WidgetImpl::size_allocate()
implementation. -
When the parent allocates space to the scrollable child widget, the widget must ensure the adjustments’ property values are correct and up to date, for example using
AdjustmentExt::configure()
. -
When any of the adjustments emits the
value-changed
signal, the scrollable widget should scroll its contents.
§Properties
§hadjustment
Horizontal Adjustment
of the scrollable widget.
This adjustment is shared between the scrollable widget and its parent.
Readable | Writeable | Construct
§hscroll-policy
Determines when horizontal scrolling should start.
Readable | Writeable
§vadjustment
Vertical Adjustment
of the scrollable widget.
This adjustment is shared between the scrollable widget and its parent.
Readable | Writeable | Construct
§vscroll-policy
Determines when vertical scrolling should start.
Readable | Writeable
§Implements
GLib type: GObject with reference counted clone semantics.
Implementations§
Source§impl Scrollable
impl Scrollable
pub const NONE: Option<&'static Scrollable> = None
Trait Implementations§
Source§impl Clone for Scrollable
impl Clone for Scrollable
Source§impl Debug for Scrollable
impl Debug for Scrollable
Source§impl HasParamSpec for Scrollable
impl HasParamSpec for Scrollable
type ParamSpec = ParamSpecObject
Source§type SetValue = Scrollable
type SetValue = Scrollable
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, Scrollable>
fn param_spec_builder() -> Self::BuilderFn
Source§impl Hash for Scrollable
impl Hash for Scrollable
Source§impl<T: ScrollableImpl> IsImplementable<T> for Scrollable
impl<T: ScrollableImpl> IsImplementable<T> for Scrollable
Source§fn interface_init(iface: &mut Interface<Self>)
fn interface_init(iface: &mut Interface<Self>)
Source§fn instance_init(_instance: &mut InitializingObject<T>)
fn instance_init(_instance: &mut InitializingObject<T>)
Source§impl Ord for Scrollable
impl Ord for Scrollable
Source§fn cmp(&self, other: &Self) -> Ordering
fn cmp(&self, other: &Self) -> Ordering
Comparison for two GObjects.
Compares the memory addresses of the provided objects.
1.21.0 · Source§fn max(self, other: Self) -> Selfwhere
Self: Sized,
fn max(self, other: Self) -> Selfwhere
Self: Sized,
Source§impl<OT: ObjectType> PartialEq<OT> for Scrollable
impl<OT: ObjectType> PartialEq<OT> for Scrollable
Source§impl<OT: ObjectType> PartialOrd<OT> for Scrollable
impl<OT: ObjectType> PartialOrd<OT> for Scrollable
Source§impl StaticType for Scrollable
impl StaticType for Scrollable
Source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for Scrollable
impl IsA<Scrollable> for ColumnView
impl IsA<Scrollable> for GridView
impl IsA<Scrollable> for IconView
impl IsA<Scrollable> for ListBase
impl IsA<Scrollable> for ListView
impl IsA<Scrollable> for TextView
impl IsA<Scrollable> for TreeView
impl IsA<Scrollable> for Viewport
Auto Trait Implementations§
impl Freeze for Scrollable
impl RefUnwindSafe for Scrollable
impl !Send for Scrollable
impl !Sync for Scrollable
impl Unpin for Scrollable
impl UnwindSafe for Scrollable
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O: ObjectType,
fn bind_property<'a, 'f, 't, O>(
&'a self,
source_property: &'a str,
target: &'a O,
target_property: &'a str,
) -> BindingBuilder<'a, 'f, 't>where
O: ObjectType,
Source§unsafe fn run_dispose(&self)
unsafe fn run_dispose(&self)
Source§impl<T> PropertyGet for Twhere
T: HasParamSpec,
impl<T> PropertyGet for Twhere
T: HasParamSpec,
Source§impl<O> ScrollableExt for Owhere
O: IsA<Scrollable>,
impl<O> ScrollableExt for Owhere
O: IsA<Scrollable>,
Source§fn border(&self) -> Option<Border>
fn border(&self) -> Option<Border>
Source§fn hadjustment(&self) -> Option<Adjustment>
fn hadjustment(&self) -> Option<Adjustment>
Adjustment
used for horizontal scrolling. Read moreSource§fn hscroll_policy(&self) -> ScrollablePolicy
fn hscroll_policy(&self) -> ScrollablePolicy
ScrollablePolicy
. Read moreSource§fn vadjustment(&self) -> Option<Adjustment>
fn vadjustment(&self) -> Option<Adjustment>
Adjustment
used for vertical scrolling. Read moreSource§fn vscroll_policy(&self) -> ScrollablePolicy
fn vscroll_policy(&self) -> ScrollablePolicy
ScrollablePolicy
. Read moreSource§fn set_hadjustment(&self, hadjustment: Option<&impl IsA<Adjustment>>)
fn set_hadjustment(&self, hadjustment: Option<&impl IsA<Adjustment>>)
Scrollable
. Read moreSource§fn set_hscroll_policy(&self, policy: ScrollablePolicy)
fn set_hscroll_policy(&self, policy: ScrollablePolicy)
ScrollablePolicy
. Read moreSource§fn set_vadjustment(&self, vadjustment: Option<&impl IsA<Adjustment>>)
fn set_vadjustment(&self, vadjustment: Option<&impl IsA<Adjustment>>)
Scrollable
. Read moreSource§fn set_vscroll_policy(&self, policy: ScrollablePolicy)
fn set_vscroll_policy(&self, policy: ScrollablePolicy)
ScrollablePolicy
. Read more