Struct gtk4::CssProvider [−][src]
pub struct CssProvider(_);Expand description
CssProvider is an object implementing the StyleProvider interface
for CSS.
It is able to parse CSS-like input in order to style widgets.
An application can make GTK parse a specific CSS style sheet by calling
load_from_file() or
load_from_resource()
and adding the provider with StyleContextExt::add_provider() or
StyleContext::add_provider_for_display().
In addition, certain files will be read when GTK is initialized.
First, the file $XDG_CONFIG_HOME/gtk-4.0/gtk.css is loaded if it
exists. Then, GTK loads the first existing file among
XDG_DATA_HOME/themes/THEME/gtk-VERSION/gtk-VARIANT.css,
$HOME/.themes/THEME/gtk-VERSION/gtk-VARIANT.css,
$XDG_DATA_DIRS/themes/THEME/gtk-VERSION/gtk-VARIANT.css and
DATADIR/share/themes/THEME/gtk-VERSION/gtk-VARIANT.css,
where THEME is the name of the current theme (see the
property::Settings::gtk-theme-name setting), VARIANT is the
variant to load (see the
property::Settings::gtk-application-prefer-dark-theme 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 4.0.
To track errors while loading CSS, connect to the
signal::CssProvider::parsing-error signal.
Implements
Implementations
Loads the data contained in file into self.
This clears any previously loaded information.
file
GFile pointing to a file to load
Loads the data contained in path into self.
This clears any previously loaded information.
path
the path of a filename to load, in the GLib filename encoding
Loads the data contained in the resource at resource_path into
the self.
This clears any previously loaded information.
resource_path
a GResource resource path
Loads a theme from the usual theme paths.
The actual process of finding the theme might change between releases, but it is guaranteed that this function uses the same mechanism to load the theme that GTK uses for loading its own theme.
name
A theme name
variant
variant to load, for example, “dark”, or
None for the default
pub fn connect_parsing_error<F: Fn(&Self, &CssSection, &Error) + 'static>(
&self,
f: F
) -> SignalHandlerId
pub fn connect_parsing_error<F: Fn(&Self, &CssSection, &Error) + 'static>(
&self,
f: F
) -> SignalHandlerId
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.
section
section the error happened in
error
The parsing error
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 CssProvider
impl !Send for CssProvider
impl !Sync for CssProvider
impl Unpin for CssProvider
impl UnwindSafe for CssProvider
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.