Struct gtk4::CssProvider
source · #[repr(transparent)]pub struct CssProvider { /* private fields */ }
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
gtk-theme-name
setting), VARIANT
is the
variant to load (see the
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
parsing-error
signal.
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.
StyleProvider
gtk-private-changed
Implements
Implementations§
source§impl CssProvider
impl CssProvider
sourcepub fn new() -> CssProvider
pub fn new() -> CssProvider
sourcepub fn load_from_data(&self, data: &str)
pub fn load_from_data(&self, data: &str)
sourcepub fn load_from_file(&self, file: &impl IsA<File>)
pub fn load_from_file(&self, file: &impl IsA<File>)
Loads the data contained in @file into @self.
This clears any previously loaded information.
file
GFile
pointing to a file to load
sourcepub fn load_from_path(&self, path: impl AsRef<Path>)
pub fn load_from_path(&self, path: impl AsRef<Path>)
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
sourcepub fn load_from_resource(&self, resource_path: &str)
pub fn load_from_resource(&self, resource_path: &str)
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
sourcepub fn load_named(&self, name: &str, variant: Option<&str>)
pub fn load_named(&self, name: &str, variant: Option<&str>)
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
sourcepub fn to_str(&self) -> GString
pub fn to_str(&self) -> GString
Converts the @self into a string representation in CSS format.
Using load_from_data()
with the return
value from this function on a new provider created with
new()
will basically create a duplicate
of this @self.
Returns
a new string representing the @self.
sourcepub 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§
source§impl Clone for CssProvider
impl Clone for CssProvider
source§impl Debug for CssProvider
impl Debug for CssProvider
source§impl Default for CssProvider
impl Default for CssProvider
source§impl Display for CssProvider
impl Display for CssProvider
source§impl HasParamSpec for CssProvider
impl HasParamSpec for CssProvider
type ParamSpec = ParamSpecObject
§type SetValue = CssProvider
type SetValue = CssProvider
type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, CssProvider>
fn param_spec_builder() -> Self::BuilderFn
source§impl Hash for CssProvider
impl Hash for CssProvider
source§impl Ord for CssProvider
impl Ord for CssProvider
source§impl ParentClassIs for CssProvider
impl ParentClassIs for CssProvider
source§impl<OT: ObjectType> PartialEq<OT> for CssProvider
impl<OT: ObjectType> PartialEq<OT> for CssProvider
source§impl<OT: ObjectType> PartialOrd<OT> for CssProvider
impl<OT: ObjectType> PartialOrd<OT> for CssProvider
1.0.0 · source§fn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
self
and other
) and is used by the <=
operator. Read moresource§impl StaticType for CssProvider
impl StaticType for CssProvider
source§fn static_type() -> Type
fn static_type() -> Type
Self
.impl Eq for CssProvider
impl IsA<StyleProvider> for CssProvider
Auto Trait Implementations§
impl RefUnwindSafe for CssProvider
impl !Send for CssProvider
impl !Sync for CssProvider
impl Unpin for CssProvider
impl UnwindSafe for CssProvider
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) -> SignalHandlerIdwhere
F: Fn(&T, &ParamSpec),
unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerIdwhere F: Fn(&T, &ParamSpec),
notify
signal of the object. Read more