Struct gtk::StyleContext

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#[repr(transparent)]
pub struct StyleContext { /* private fields */ }

Expand description

StyleContext is an object that stores styling information affecting a widget defined by WidgetPath.

In order to construct the final style information, StyleContext queries information from all attached GtkStyleProviders. Style providers can be either attached explicitly to the context through StyleContextExt::add_provider(), or to the screen through add_provider_for_screen(). The resulting style is a combination of all providers’ information in priority order.

For GTK+ widgets, any StyleContext returned by WidgetExt::style_context() will already have a WidgetPath, a gdk::Screen and RTL/LTR information set. The style context will also be updated automatically if any of these settings change on the widget.

If you are using the theming layer standalone, you will need to set a widget path and a screen yourself to the created style context through StyleContextExt::set_path() and possibly StyleContextExt::set_screen(). See the “Foreign drawing“ example in gtk3-demo.

Style Classes # {`gtkstylecontext`-classes}

Widgets can add style classes to their context, which can be used to associate different styles by class. The documentation for individual widgets lists which style classes it uses itself, and which style classes may be added by applications to affect their appearance.

GTK+ defines macros for a number of style classes.

Style Regions

Widgets can also add regions with flags to their context. This feature is deprecated and will be removed in a future GTK+ update. Please use style classes instead.

GTK+ defines macros for a number of style regions.

Custom styling in UI libraries and applications

If you are developing a library with custom GtkWidgets that render differently than standard components, you may need to add a StyleProvider yourself with the GTK_STYLE_PROVIDER_PRIORITY_FALLBACK priority, either a CssProvider or a custom object implementing the StyleProvider interface. This way themes may still attempt to style your UI elements in a different way if needed so.

If you are using custom styling on an applications, you probably want then to make your style information prevail to the theme’s, so you must use a StyleProvider with the GTK_STYLE_PROVIDER_PRIORITY_APPLICATION priority, keep in mind that the user settings in XDG_CONFIG_HOME/gtk-3.0/gtk.css will still take precedence over your changes, as it uses the GTK_STYLE_PROVIDER_PRIORITY_USER priority.

Implements

StyleContextExt, glib::ObjectExt, StyleContextExtManual

Struct gtk::StyleContext

Implementations

impl StyleContext

pub const NONE: Option<&'static StyleContext> = None

pub fn new() -> StyleContext

pub fn builder() -> StyleContextBuilder

pub fn add_provider_for_screen( screen: &Screen, provider: &impl IsA<StyleProvider>, priority: u32)

pub fn remove_provider_for_screen( screen: &Screen, provider: &impl IsA<StyleProvider>)

pub fn reset_widgets(screen: &Screen)

Trait Implementations

impl Clone for StyleContext

fn clone(&self) -> Self

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

impl Debug for StyleContext

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

impl Default for StyleContext

fn default() -> Self

impl Display for StyleContext

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

impl Hash for StyleContext

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

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

impl Ord for StyleContext

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

const fn max(self, other: Self) -> Self

const fn min(self, other: Self) -> Self

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

impl ParentClassIs for StyleContext

type Parent = Object

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

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

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

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

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

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

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

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

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

impl StaticType for StyleContext

fn static_type() -> Type

impl Eq for StyleContext

Auto Trait Implementations

impl RefUnwindSafe for StyleContext

impl !Send for StyleContext

impl !Sync for StyleContext

impl Unpin for StyleContext

impl UnwindSafe for StyleContext

Blanket Implementations

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

fn type_id(&self) -> TypeId

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

fn borrow(&self) -> &T

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

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

impl<T> Cast for Twhere T: ObjectType,

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

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

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

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

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

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

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

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

impl<T> From<T> for T

fn from(t: T) -> T

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

fn into(self) -> U

impl<U> IsSubclassableExt for Uwhere U: IsClass + ParentClassIs,

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

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

impl<T> ObjectExt for Twhere T: ObjectType,

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

fn type_(&self) -> Type

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

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

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

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

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

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

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

pub fn add_provider_for_screen(
screen: &Screen,
provider: &impl IsA<StyleProvider>,
priority: u32
)

pub fn remove_provider_for_screen(
screen: &Screen,
provider: &impl IsA<StyleProvider>
)

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

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

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

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

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

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

impl<T> Cast for Twhere
T: ObjectType,

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

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

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

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

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

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

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

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

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

impl<U> IsSubclassableExt for Uwhere
U: IsClass + ParentClassIs,

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

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

impl<T> ObjectExt for Twhere
T: ObjectType,

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

impl<T> StaticTypeExt for Twhere
T: StaticType,

impl<T> ToClosureReturnValue for Twhere
T: ToValue,

impl<T> ToOwned for Twhere
T: Clone,