Struct gtk4::AspectFrame [−][src]
pub struct AspectFrame(_);Expand description
AspectFrame preserves the aspect ratio of its child.
The frame can respect the aspect ratio of the child widget, or use its own aspect ratio.
CSS nodes
AspectFrame uses a CSS node with name frame.
Implements
WidgetExt, glib::ObjectExt, AccessibleExt, BuildableExt, ConstraintTargetExt, WidgetExtManual, AccessibleExtManual
Implementations
Create a new AspectFrame.
xalign
Horizontal alignment of the child within the parent. Ranges from 0.0 (left aligned) to 1.0 (right aligned)
yalign
Vertical alignment of the child within the parent. Ranges from 0.0 (top aligned) to 1.0 (bottom aligned)
ratio
The desired aspect ratio.
obey_child
If true, ratio is ignored, and the aspect
ratio is taken from the requistion of the child.
Returns
the new AspectFrame.
Creates a new builder-pattern struct instance to construct AspectFrame objects.
This method returns an instance of AspectFrameBuilder which can be used to create AspectFrame objects.
Returns whether the child’s size request should override
the set aspect ratio of the AspectFrame.
Returns
whether to obey the child’s size request
Returns the horizontal alignment of the child within the
allocation of the AspectFrame.
Returns
the horizontal alignment
Returns the vertical alignment of the child within the
allocation of the AspectFrame.
Returns
the vertical alignment
Sets whether the aspect ratio of the child’s size
request should override the set aspect ratio of
the AspectFrame.
obey_child
If true, ratio is ignored, and the aspect
ratio is taken from the requistion of the child.
Sets the horizontal alignment of the child within the allocation
of the AspectFrame.
xalign
horizontal alignment, from 0.0 (left aligned) to 1.0 (right aligned)
Sets the vertical alignment of the child within the allocation
of the AspectFrame.
yalign
horizontal alignment, from 0.0 (top aligned) to 1.0 (bottom aligned)
Trait Implementations
This method returns an ordering between self and other values if one exists. Read more
This method tests less than (for self and other) and is used by the < operator. Read more
This method tests less than or equal to (for self and other) and is used by the <=
operator. Read more
This method tests greater than (for self and other) and is used by the > operator. Read more
Returns the type identifier of Self.
Auto Trait Implementations
impl RefUnwindSafe for AspectFrame
impl !Send for AspectFrame
impl !Sync for AspectFrame
impl Unpin for AspectFrame
impl UnwindSafe for AspectFrame
Blanket Implementations
Mutably borrows from an owned value. Read more
Upcasts an object to a superclass or interface T. Read more
Upcasts an object to a reference of its superclass or interface T. Read more
Tries to downcast to a subclass or interface implementor T. Read more
Tries to downcast to a reference of its subclass or interface implementor T. Read more
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
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
Casts to T unconditionally. Read more
Casts to &T unconditionally. Read more
Returns true if the object is an instance of (can be cast to) T.
pub fn set_property<'a, N, V>(
&self,
property_name: N,
value: V
) -> Result<(), BoolError> where
N: Into<&'a str>,
V: ToValue,
pub fn set_property_from_value<'a, N>(
&self,
property_name: N,
value: &Value
) -> Result<(), BoolError> where
N: Into<&'a str>,
pub fn set_properties_from_value(
&self,
property_values: &[(&str, Value)]
) -> Result<(), BoolError>
pub fn has_property<'a, N>(&self, property_name: N, type_: Option<Type>) -> bool where
N: Into<&'a str>,
pub fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where
N: Into<&'a str>,
Safety Read more
Safety Read more
Safety Read more
Safety Read more
pub fn connect<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
N: Into<&'a str>,
F: 'static + Fn(&[Value]) -> Option<Value> + Send + Sync,
Same as connect but takes a SignalId instead of a signal name.
pub fn connect_local<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
N: Into<&'a str>,
F: 'static + Fn(&[Value]) -> Option<Value>,
Same as connect_local but takes a SignalId instead of a signal name.
pub unsafe fn connect_unsafe<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
N: Into<&'a str>,
F: Fn(&[Value]) -> Option<Value>,
Same as connect_unsafe but takes a SignalId instead of a signal name.
Emit signal by signal id.
Same as emit but takes Value for the arguments.
Emit signal by its name.
Same as emit_by_name but takes Value for the arguments.
Emit signal with details by signal id.
Same as emit_with_details but takes Value for the arguments.
pub fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
pub fn connect_notify_local<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec),
pub unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec),
pub fn bind_property<'a, O, N, M>(
&'a self,
source_property: N,
target: &'a O,
target_property: M
) -> BindingBuilder<'a> where
O: ObjectType,
N: Into<&'a str>,
M: Into<&'a str>,
Returns a SendValue clone of self.