Struct components::Backend [−][src]
pub struct Backend(_, _);
Implementations
impl Backend[src]
impl Backend[src]pub fn get_font_options(&self) -> Option<FontOptions>[src]
Retrieves the font options for self.
Returns
the font options of the Backend.
The returned cairo::FontOptions is owned by the backend and should
not be modified or freed
pub fn get_resolution(&self) -> f64[src]
Gets the resolution for font handling on the screen.
The resolution is a scale factor between points specified in a
pango::FontDescription and cairo units. The default value is 96.0,
meaning that a 10 point font will be 13 units
high (10 * 96. / 72. = 13.3).
will set the resolution using the current backend when
initializing; the resolution is also stored in the
Settings:font-dpi property.
Returns
the current resolution, or -1 if no resolution has been set.
pub fn set_font_options(&self, options: &FontOptions)[src]
Sets the new font options for self. The Backend will
copy the cairo::FontOptions.
If options is None, the first following call to
Backend::get_font_options will return the default font
options for self.
This function is intended for actors creating a Pango layout using the PangoCairo API.
options
Cairo font options for the backend, or None
pub fn connect_font_changed<F>(&self, f: F) -> SignalHandlerId where
F: 'static + Fn(&Backend), [src]
F: 'static + Fn(&Backend),
The ::font-changed signal is emitted each time the font options
have been changed through Settings.
pub fn connect_resolution_changed<F>(&self, f: F) -> SignalHandlerId where
F: 'static + Fn(&Backend), [src]
F: 'static + Fn(&Backend),
The ::resolution-changed signal is emitted each time the font
resolutions has been changed through Settings.
pub fn connect_settings_changed<F>(&self, f: F) -> SignalHandlerId where
F: 'static + Fn(&Backend), [src]
F: 'static + Fn(&Backend),
The ::settings-changed signal is emitted each time the Settings
properties have been changed.
Trait Implementations
impl<T> PartialEq<T> for Backend where
T: ObjectType, [src]
impl<T> PartialEq<T> for Backend where
T: ObjectType, [src]impl<T> PartialOrd<T> for Backend where
T: ObjectType, [src]
impl<T> PartialOrd<T> for Backend where
T: ObjectType, [src]impl StaticType for Backend[src]
impl StaticType for Backend[src]pub fn static_type() -> Type[src]
Auto Trait Implementations
impl RefUnwindSafe for Backend
impl RefUnwindSafe for Backendimpl UnwindSafe for Backend
impl UnwindSafe for BackendBlanket Implementations
impl<Super, Sub> CanDowncast<Sub> for Super where
Sub: IsA<Super>,
Super: IsA<Super>, [src]
impl<Super, Sub> CanDowncast<Sub> for Super where
Sub: IsA<Super>,
Super: IsA<Super>, [src]impl<T> Cast for T where
T: ObjectType, [src]
impl<T> Cast for T where
T: ObjectType, [src]pub fn upcast<T>(self) -> T where
Self: IsA<T>,
T: ObjectType, [src]
Self: IsA<T>,
T: ObjectType,
pub fn upcast_ref<T>(&self) -> &T where
Self: IsA<T>,
T: ObjectType, [src]
Self: IsA<T>,
T: ObjectType,
pub fn downcast<T>(self) -> Result<T, Self> where
Self: CanDowncast<T>,
T: ObjectType, [src]
Self: CanDowncast<T>,
T: ObjectType,
pub fn downcast_ref<T>(&self) -> Option<&T> where
Self: CanDowncast<T>,
T: ObjectType, [src]
Self: CanDowncast<T>,
T: ObjectType,
pub fn dynamic_cast<T>(self) -> Result<T, Self> where
T: ObjectType, [src]
T: ObjectType,
pub fn dynamic_cast_ref<T>(&self) -> Option<&T> where
T: ObjectType, [src]
T: ObjectType,
pub unsafe fn unsafe_cast<T>(self) -> T where
T: ObjectType, [src]
T: ObjectType,
pub unsafe fn unsafe_cast_ref<T>(&self) -> &T where
T: ObjectType, [src]
T: ObjectType,
impl<Fr, To> IntoColor<To> for Fr where
To: FromColor<Fr>,
impl<Fr, To> IntoColor<To> for Fr where
To: FromColor<Fr>, pub fn into_color(self) -> To
impl<T> ObjectExt for T where
T: ObjectType, [src]
impl<T> ObjectExt for T where
T: ObjectType, [src]pub fn is<U>(&self) -> bool where
U: StaticType, [src]
U: StaticType,
pub fn get_type(&self) -> Type[src]
pub fn get_object_class(&self) -> &ObjectClass[src]
pub fn set_properties(
&self,
property_values: &[(&str, &dyn ToValue)]
) -> Result<(), BoolError>[src]
&self,
property_values: &[(&str, &dyn ToValue)]
) -> Result<(), BoolError>
pub fn set_property<'a, N>(
&self,
property_name: N,
value: &dyn ToValue
) -> Result<(), BoolError> where
N: Into<&'a str>, [src]
&self,
property_name: N,
value: &dyn ToValue
) -> Result<(), BoolError> where
N: Into<&'a str>,
pub fn get_property<'a, N>(&self, property_name: N) -> Result<Value, BoolError> where
N: Into<&'a str>, [src]
N: Into<&'a str>,
pub unsafe fn set_qdata<QD>(&self, key: Quark, value: QD) where
QD: 'static, [src]
QD: 'static,
pub unsafe fn get_qdata<QD>(&self, key: Quark) -> Option<&QD> where
QD: 'static, [src]
QD: 'static,
pub unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD> where
QD: 'static, [src]
QD: 'static,
pub unsafe fn set_data<QD>(&self, key: &str, value: QD) where
QD: 'static, [src]
QD: 'static,
pub unsafe fn get_data<QD>(&self, key: &str) -> Option<&QD> where
QD: 'static, [src]
QD: 'static,
pub unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD> where
QD: 'static, [src]
QD: 'static,
pub fn block_signal(&self, handler_id: &SignalHandlerId)[src]
pub fn unblock_signal(&self, handler_id: &SignalHandlerId)[src]
pub fn stop_signal_emission(&self, signal_name: &str)[src]
pub fn disconnect(&self, handler_id: SignalHandlerId)[src]
pub fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId where
F: 'static + Fn(&T, &ParamSpec) + Send + Sync, [src]
F: 'static + Fn(&T, &ParamSpec) + Send + Sync,
pub unsafe fn connect_notify_unsafe<F>(
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec), [src]
&self,
name: Option<&str>,
f: F
) -> SignalHandlerId where
F: Fn(&T, &ParamSpec),
pub fn notify<'a, N>(&self, property_name: N) where
N: Into<&'a str>, [src]
N: Into<&'a str>,
pub fn notify_by_pspec(&self, pspec: &ParamSpec)[src]
pub fn has_property<'a, N>(&self, property_name: N, type_: Option<Type>) -> bool where
N: Into<&'a str>, [src]
N: Into<&'a str>,
pub fn get_property_type<'a, N>(&self, property_name: N) -> Option<Type> where
N: Into<&'a str>, [src]
N: Into<&'a str>,
pub fn find_property<'a, N>(&self, property_name: N) -> Option<ParamSpec> where
N: Into<&'a str>, [src]
N: Into<&'a str>,
pub fn list_properties(&self) -> Vec<ParamSpec, Global>ⓘ[src]
pub fn connect<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
N: Into<&'a str>, [src]
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,
N: Into<&'a str>,
pub fn connect_local<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + 'static,
N: Into<&'a str>, [src]
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value> + 'static,
N: Into<&'a str>,
pub unsafe fn connect_unsafe<'a, N, F>(
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value>,
N: Into<&'a str>, [src]
&self,
signal_name: N,
after: bool,
callback: F
) -> Result<SignalHandlerId, BoolError> where
F: Fn(&[Value]) -> Option<Value>,
N: Into<&'a str>,
pub fn emit<'a, N>(
&self,
signal_name: N,
args: &[&dyn ToValue]
) -> Result<Option<Value>, BoolError> where
N: Into<&'a str>, [src]
&self,
signal_name: N,
args: &[&dyn ToValue]
) -> Result<Option<Value>, BoolError> where
N: Into<&'a str>,
pub fn downgrade(&self) -> WeakRef<T>[src]
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>, [src]
&'a self,
source_property: N,
target: &'a O,
target_property: M
) -> BindingBuilder<'a> where
O: ObjectType,
N: Into<&'a str>,
M: Into<&'a str>,
pub fn ref_count(&self) -> u32[src]
impl<T> ToSendValue for T where
T: SetValue + Send + ToValue + ?Sized, [src]
impl<T> ToSendValue for T where
T: SetValue + Send + ToValue + ?Sized, [src]pub fn to_send_value(&self) -> SendValue[src]
impl<V, T> VZip<V> for T where
V: MultiLane<T>,
impl<V, T> VZip<V> for T where
V: MultiLane<T>,