Struct gtk4::Viewport

impl Viewport

pub fn new(
hadjustment: Option<&impl IsA<Adjustment>>,
vadjustment: Option<&impl IsA<Adjustment>>
) -> Viewport

Creates a new Viewport.

The new viewport uses the given adjustments, or default adjustments if none are given.

pub fn builder() -> ViewportBuilder

Creates a new builder-pattern struct instance to construct Viewport objects.

This method returns an instance of ViewportBuilder which can be used to create Viewport objects.

pub fn child(&self) -> Option<Widget>

Gets the child widget of @self.

pub fn is_scroll_to_focus(&self) -> bool

Gets whether the viewport is scrolling to keep the focused child in view.

Returns

true if the viewport keeps the focus child scrolled to view

pub fn set_child(&self, child: Option<&impl IsA<Widget>>)

Sets the child widget of @self.

pub fn set_scroll_to_focus(&self, scroll_to_focus: bool)

Sets whether the viewport should automatically scroll to keep the focused child in view.

`scroll_to_focus`

whether to keep the focus widget scrolled to view

pub fn connect_child_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId

pub fn connect_scroll_to_focus_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId

Trait Implementations§

impl Clone for Viewport

fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source§

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for Viewport

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

impl Default for Viewport

fn default() -> Self

Returns the “default value” for a type. Read more

impl Display for Viewport

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

impl Hash for Viewport

fn hash<H>(&self, state: &mut H)where
H: Hasher,

Feeds this value into the given Hasher. Read more

1.3.0 · source§

fn hash_slice<H>(data: &[Self], state: &mut H)where
H: Hasher,
Self: Sized,

Feeds a slice of this type into the given Hasher. Read more

impl Ord for Viewport

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other. Read more

1.21.0 · source§

fn max(self, other: Self) -> Selfwhere
Self: Sized,

Compares and returns the maximum of two values. Read more

1.21.0 · source§

fn min(self, other: Self) -> Selfwhere
Self: Sized,

Compares and returns the minimum of two values. Read more

1.50.0 · source§

fn clamp(self, min: Self, max: Self) -> Selfwhere
Self: Sized + PartialOrd<Self>,

Restrict a value to a certain interval. Read more

impl ParentClassIs for Viewport

impl<OT: ObjectType> PartialEq<OT> for Viewport

fn eq(&self, other: &OT) -> bool

This method tests for self and other values to be equal, and is used by ==.

1.0.0 · source§

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<OT: ObjectType> PartialOrd<OT> for Viewport

fn partial_cmp(&self, other: &OT) -> Option<Ordering>

This method returns an ordering between self and other values if one exists. Read more

1.0.0 · source§

fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more

1.0.0 · source§

fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

1.0.0 · source§

fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more

1.0.0 · source§

fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more

impl StaticType for Viewport

fn static_type() -> Type

Returns the type identifier of Self.

Auto Trait Implementations§

impl RefUnwindSafe for Viewport

Blanket Implementations§

impl<O> AccessibleExtManual for Owhere
O: IsA<Accessible>,

fn update_property(&self, properties: &[Property<'_>])

Updates an array of accessible properties. Read more

fn update_relation(&self, relations: &[Relation<'_>])

Updates an array of accessible relations. Read more

fn update_state(&self, states: &[State])

Updates an array of accessible states. Read more

impl<T> Any for Twhere
T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for Twhere
T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

impl<T> Cast for Twhere
T: ObjectType,

fn upcast<T>(self) -> Twhere
T: ObjectType,
Self: IsA<T>,

Upcasts an object to a superclass or interface T. Read more

fn upcast_ref<T>(&self) -> &Twhere
T: ObjectType,
Self: IsA<T>,

Upcasts an object to a reference of its superclass or interface T. Read more

fn downcast<T>(self) -> Result<T, Self>where
T: ObjectType,
Self: CanDowncast<T>,

Tries to downcast to a subclass or interface implementor T. Read more

fn downcast_ref<T>(&self) -> Option<&T>where
T: ObjectType,
Self: CanDowncast<T>,

Tries to downcast to a reference of its subclass or interface implementor T. Read more

fn dynamic_cast<T>(self) -> Result<T, Self>where
T: ObjectType,

Tries to cast to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more

fn dynamic_cast_ref<T>(&self) -> Option<&T>where
T: ObjectType,

Tries to cast to reference to an object of type T. This handles upcasting, downcasting and casting between interface and interface implementors. All checks are performed at runtime, while downcast and upcast will do many checks at compile-time already. Read more

unsafe fn unsafe_cast<T>(self) -> Twhere
T: ObjectType,

Casts to T unconditionally. Read more

unsafe fn unsafe_cast_ref<T>(&self) -> &Twhere
T: ObjectType,

Casts to &T unconditionally. Read more

impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into for Twhere
U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

impl IsSubclassableExt for Uwhere
U: IsClass + ParentClassIs,

fn parent_class_init<T>(class: &mut Class)where
T: ObjectSubclass,
::Parent: IsSubclassable<T>,

fn parent_instance_init<T>(instance: &mut InitializingObject<T>)where
T: ObjectSubclass,
::Parent: IsSubclassable<T>,

impl<T> ObjectExt for Twhere
T: ObjectType,

fn is(&self) -> boolwhere
U: StaticType,

Returns true if the object is an instance of (can be cast to) T.

fn type_(&self) -> Type

Returns the type of the object.

fn object_class(&self) -> &Class<Object>

Returns the ObjectClass of the object. Read more

fn class(&self) -> &Class<T>where
T: IsClass,

Returns the class of the object.

fn class_of(&self) -> Option<&Class>where
U: IsClass,

Returns the class of the object in the given type T. Read more

fn interface(&self) -> Option<InterfaceRef<'_, U>>where
U: IsInterface,

Returns the interface T of the object. Read more

fn set_property<V>(&self, property_name: &str, value: V)where
V: ToValue,

Sets the property property_name of the object to value value. Read more

fn set_property_from_value(&self, property_name: &str, value: &Value)

Sets the property property_name of the object to value value. Read more

fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])

Sets multiple properties of the object at once. Read more

fn set_properties_from_value(&self, property_values: &[(&str, Value)])

Sets multiple properties of the object at once. Read more

fn property<V>(&self, property_name: &str) -> Vwhere
V: 'static + for<'b> FromValue<'b>,

Gets the property property_name of the object and cast it to the type V. Read more

fn property_value(&self, property_name: &str) -> Value

Gets the property property_name of the object. Read more

fn has_property(&self, property_name: &str, type_: Option<Type>) -> bool

Check if the object has a property property_name of the given type_. Read more

fn property_type(&self, property_name: &str) -> Option<Type>

Get the type of the property property_name of this object. Read more

fn find_property(&self, property_name: &str) -> Option<ParamSpec>

Get the ParamSpec of the property property_name of this object.

fn list_properties(&self) -> PtrSlice<ParamSpec>

Return all ParamSpec of the properties of this object.

fn freeze_notify(&self) -> PropertyNotificationFreezeGuard

Freeze all property notifications until the return guard object is dropped. Read more

unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)where
QD: 'static,

Set arbitrary data on this object with the given key. Read more

unsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>where
QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more

unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>where
QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more

unsafe fn set_data<QD>(&self, key: &str, value: QD)where
QD: 'static,

Set arbitrary data on this object with the given key. Read more

unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>where
QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more

unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>where
QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more

fn block_signal(&self, handler_id: &SignalHandlerId)

Block a given signal handler. Read more

fn unblock_signal(&self, handler_id: &SignalHandlerId)

Unblock a given signal handler.

fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)

Stop emission of the currently emitted signal.

fn stop_signal_emission_by_name(&self, signal_name: &str)

Stop emission of the currently emitted signal by the (possibly detailed) signal name.

fn connect<F>(
 &self,
 signal_name: &str,
 after: bool,
 callback: F
) -> SignalHandlerIdwhere
 F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,

Connect to the signal signal_name on this object. Read more

fn connect_id<F>(
 &self,
 signal_id: SignalId,
 details: Option<Quark>,
 after: bool,
 callback: F
) -> SignalHandlerIdwhere
 F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,

Connect to the signal signal_id on this object. Read more

fn connect_local<F>(
 &self,
 signal_name: &str,
 after: bool,
 callback: F
) -> SignalHandlerIdwhere
 F: 'static + Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_name on this object. Read more

fn connect_local_id<F>(
 &self,
 signal_id: SignalId,
 details: Option<Quark>,
 after: bool,
 callback: F
) -> SignalHandlerIdwhere
 F: 'static + Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_id on this object. Read more

unsafe fn connect_unsafe<F>(
 &self,
 signal_name: &str,
 after: bool,
 callback: F
) -> SignalHandlerIdwhere
 F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_name on this object. Read more

unsafe fn connect_unsafe_id<F>(
 &self,
 signal_id: SignalId,
 details: Option<Quark>,
 after: bool,
 callback: F
) -> SignalHandlerIdwhere
 F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_id on this object. Read more

fn connect_closure(
    &self,
    signal_name: &str,
    after: bool,
    closure: RustClosure
) -> SignalHandlerId

Connect a closure to the signal signal_name on this object. Read more

fn connect_closure_id(
 &self,
 signal_id: SignalId,
 details: Option<Quark>,
 after: bool,
 closure: RustClosure
) -> SignalHandlerId

Connect a closure to the signal signal_id on this object. Read more

fn watch_closure(&self, closure: &impl AsRef<Closure>)

Limits the lifetime of 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.

fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,

Emit signal by signal id. Read more

fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>

Same as Self::emit but takes Value for the arguments.

fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> Rwhere
R: TryFromClosureReturnValue,

Emit signal by its name. Read more

fn emit_by_name_with_values(
 &self,
 signal_name: &str,
 args: &[Value]
) -> Option<Value>

Emit signal by its name. Read more

fn emit_by_name_with_details<R>(
 &self,
 signal_name: &str,
 details: Quark,
 args: &[&dyn ToValue]
) -> Rwhere
 R: TryFromClosureReturnValue,

Emit signal by its name with details. Read more

fn emit_by_name_with_details_and_values(
 &self,
 signal_name: &str,
 details: Quark,
 args: &[Value]
) -> Option<Value>

Emit signal by its name with details. Read more

fn emit_with_details<R>(
 &self,
 signal_id: SignalId,
 details: Quark,
 args: &[&dyn ToValue]
) -> Rwhere
 R: TryFromClosureReturnValue,

Emit signal by signal id with details. Read more

fn emit_with_details_and_values(
 &self,
 signal_id: SignalId,
 details: Quark,
 args: &[Value]
) -> Option<Value>

Emit signal by signal id with details. Read more

fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.

fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,

Connect to the notify signal of the object. Read more

fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerIdwhere
F: 'static + Fn(&T, &ParamSpec),

Connect to the notify signal of the object. Read more

unsafe fn connect_notify_unsafe<F>(
 &self,
 name: Option<&str>,
 f: F
) -> SignalHandlerIdwhere
 F: Fn(&T, &ParamSpec),

Connect to the notify signal of the object. Read more

fn notify(&self, property_name: &str)

Notify that the given property has changed its value. Read more

fn notify_by_pspec(&self, pspec: &ParamSpec)

Notify that the given property has changed its value. Read more

fn downgrade(&self) -> WeakRef<T>

Downgrade this object to a weak reference.

fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>where
F: 'static + FnOnce() + Send,

Add a callback to be notified when the Object is disposed.

fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>where
F: 'static + FnOnce(),

Add a callback to be notified when the Object is disposed. Read more

fn bind_property<'f, 't, O, 'a>(
 &'a self,
 source_property: &'a str,
 target: &'a O,
 target_property: &'a str
) -> BindingBuilder<'a, 'f, 't>where
 O: ObjectType,

Bind property source_property on this object to the target_property on the target object. Read more

fn ref_count(&self) -> u32

Returns the strong reference count of this object.

unsafe fn run_dispose(&self)

Runs the dispose mechanism of the object. Read more

impl<T> StaticTypeExt for Twhere
T: StaticType,

fn ensure_type()

Ensures that the type has been registered with the type system.

impl<T> ToClosureReturnValue for Twhere
T: ToValue,

fn to_closure_return_value(&self) -> Option<Value>

impl<T> ToOwned for Twhere
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

impl<T> ToString for Twhere
T: Display + ?Sized,

default fn to_string(&self) -> String

Converts the given value to a String. Read more

impl<T, U> TryFrom for Twhere
U: Into<T>,

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>

Performs the conversion.

impl<T> TryFromClosureReturnValue for Twhere
T: 'static + for<'a> FromValue<'a> + StaticType,

fn try_from_closure_return_value(v: Option<Value>) -> Result<T, BoolError>

impl<T, U> TryInto for Twhere
U: TryFrom<T>,

type Error = >::Error

The type returned in the event of a conversion error.

const: unstable · source§

fn try_into(self) -> Result<U, >::Error>

Performs the conversion.

impl<Super, Sub> CanDowncast for Superwhere
Super: IsA<Super>,
Sub: IsA<Super>,