Struct CssProvider 

pub struct CssProvider { /* private fields */ }

GtkCssProvider is an object implementing the StyleProvider interface. It is able to parse [CSS-like][css-overview] input in order to style widgets.

An application can make GTK+ parse a specific CSS style sheet by calling CssProviderExt::load_from_file() or CssProviderExt::load_from_resource() and adding the provider with StyleContextExt::add_provider() or StyleContext::add_provider_for_screen().

In addition, certain files will be read when GTK+ is initialized. First, the file $XDG_CONFIG_HOME/gtk-3.0/gtk.css is loaded if it exists. Then, GTK+ loads the first existing file among XDG_DATA_HOME/themes/THEME/gtk-VERSION/gtk.css, $HOME/.themes/THEME/gtk-VERSION/gtk.css, $XDG_DATA_DIRS/themes/THEME/gtk-VERSION/gtk.css and DATADIR/share/themes/THEME/gtk-VERSION/gtk.css, where THEME is the name of the current theme (see the gtk-theme-name setting), DATADIR is the prefix configured when GTK+ was compiled (unless overridden by the GTK_DATA_PREFIX environment variable), and VERSION is the GTK+ version number. If no file is found for the current version, GTK+ tries older versions all the way back to 3.0.

In the same way, GTK+ tries to load a gtk-keys.css file for the current key theme, as defined by gtk-key-theme-name.

Signals

parsing-error

Signals that a parsing error occurred. the path, line and position describe the actual location of the error as accurately as possible.

Parsing errors are never fatal, so the parsing will resume after the error. Errors may however cause parts of the given data or even all of it to not be parsed at all. So it is a useful idea to check that the parsing succeeds by connecting to this signal.

Note that this signal may be emitted at any time as the css provider may opt to defer parsing parts or all of the input to a later time than when a loading function was called.

Implements

CssProviderExt, [trait@glib::ObjectExt], StyleProviderExt

GLib type: GObject with reference counted clone semantics.

Implementations

impl CssProvider

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

pub fn new() -> CssProvider

Returns a newly created CssProvider.

Returns

A new CssProvider

pub fn default() -> Option<CssProvider>

👎Deprecated:

Since 3.24

Returns the provider containing the style settings used as a fallback for all widgets.

Deprecated since 3.24

Use new() instead.

Returns

The provider used for fallback styling. This memory is owned by GTK+, and you must not free it.

pub fn named(name: &str, variant: Option<&str>) -> Option<CssProvider>

Loads a theme from the usual theme paths

name

A theme name

variant

variant to load, for example, “dark”, or None for the default

Returns

a CssProvider with the theme loaded. This memory is owned by GTK+, and you must not free it.

Trait Implementations

impl Clone for CssProvider

fn clone(&self) -> Self

Makes a clone of this shared reference.

This increments the strong reference count of the object. Dropping the object will decrement it again.

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

Performs copy-assignment from source.

impl Debug for CssProvider

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

Formats the value using the given formatter.

impl Default for CssProvider

fn default() -> Self

Returns the “default value” for a type.

impl Display for CssProvider

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

Formats the value using the given formatter.

impl Eq for CssProvider

impl HasParamSpec for CssProvider

type ParamSpec = ParamSpecObject

type SetValue = CssProvider

Preferred value to be used as setter for the associated ParamSpec.

type BuilderFn = fn(&str) -> ParamSpecObjectBuilder<'_, CssProvider>

fn param_spec_builder() -> Self::BuilderFn

impl Hash for CssProvider

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

where H: Hasher,

Hashes the memory address of this object.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl IsA<StyleProvider> for CssProvider

impl Ord for CssProvider

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

Comparison for two GObjects.

Compares the memory addresses of the provided objects.

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

where Self: Sized,

Compares and returns the maximum of two values.

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

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl ParentClassIs for CssProvider

type Parent = Object

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

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

Equality for two GObjects.

Two GObjects are equal if their memory addresses are equal.

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

Inequality operator !=.

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

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

Partial comparison for two GObjects.

Compares the memory addresses of the provided objects.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StaticType for CssProvider

fn static_type() -> Type

Returns the type identifier of Self.