Struct gtk4::Scrollable
source · #[repr(transparent)]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 thevfunc::Gtk::Widget::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
vfunc::Gtk::Widget::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
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 Display for Scrollable
impl Display for Scrollable
source§impl HasParamSpec for Scrollable
impl HasParamSpec for Scrollable
type ParamSpec = ParamSpecObject
§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§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
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 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 RefUnwindSafe for Scrollable
impl !Send for Scrollable
impl !Sync for Scrollable
impl Unpin for Scrollable
impl UnwindSafe for Scrollable
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