Trait gtk4::prelude::StyleContextExt[][src]

pub trait StyleContextExt: 'static {
Show 20 methods fn add_class(&self, class_name: &str);
fn add_provider(&self, provider: &impl IsA<StyleProvider>, priority: u32);
fn border(&self) -> Border;
fn color(&self) -> RGBA;
fn display(&self) -> Display;
fn margin(&self) -> Border;
fn padding(&self) -> Border;
fn scale(&self) -> i32;
fn state(&self) -> StateFlags;
fn has_class(&self, class_name: &str) -> bool;
fn lookup_color(&self, color_name: &str) -> Option<RGBA>;
fn remove_class(&self, class_name: &str);
fn remove_provider(&self, provider: &impl IsA<StyleProvider>);
fn restore(&self);
fn save(&self);
fn set_display(&self, display: &impl IsA<Display>);
fn set_scale(&self, scale: i32);
fn set_state(&self, flags: StateFlags);
fn to_string(&self, flags: StyleContextPrintFlags) -> GString;
fn connect_display_notify<F: Fn(&Self) + 'static>(
        &self,
        f: F
    ) -> SignalHandlerId;
}
Expand description

Trait containing all StyleContext methods.

Implementors

StyleContext

Required methods

Adds a style class to self, so later uses of the style context will make use of this new class for styling.

In the CSS file format, a Entry defining a “search” class, would be matched by:

entry.search { ... }

While any widget defining a “search” class would be matched by:

.search { ... }
class_name

class name to use in styling

Adds a style provider to self, to be used in style construction.

Note that a style provider added by this function only affects the style of the widget to which self belongs. If you want to affect the style of all widgets, use StyleContext::add_provider_for_display().

Note: If both priorities are the same, a StyleProvider added through this function takes precedence over another added through StyleContext::add_provider_for_display().

provider

a StyleProvider

priority

the priority of the style provider. The lower it is, the earlier it will be used in the style construction. Typically this will be in the range between GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and GTK_STYLE_PROVIDER_PRIORITY_USER

Gets the border for a given state as a Border.

Returns
border

return value for the border settings

Gets the foreground color for a given state.

Returns
color

return value for the foreground color

Returns the gdk::Display to which self is attached.

Returns

a gdk::Display.

Gets the margin for a given state as a Border.

Returns
margin

return value for the margin settings

Gets the padding for a given state as a Border.

Returns
padding

return value for the padding settings

Returns the scale used for assets.

Returns

the scale

Returns the state used for style matching.

This method should only be used to retrieve the StateFlags to pass to StyleContext methods, like padding(). If you need to retrieve the current state of a Widget, use WidgetExt::state_flags().

Returns

the state flags

Returns true if self currently has defined the given class name.

class_name

a class name

Returns

true if self has class_name defined

Looks up and resolves a color name in the self color map.

color_name

color name to lookup

Returns

true if color_name was found and resolved, false otherwise

color

Return location for the looked up color

Removes class_name from self.

class_name

class name to remove

Removes provider from the style providers list in self.

provider

a StyleProvider

Restores self state to a previous stage.

See save().

Saves the self state.

This allows temporary modifications done through add_class(), remove_class(), set_state() to be quickly reverted in one go through restore().

The matching call to restore() must be done before GTK returns to the main loop.

Attaches self to the given display.

The display is used to add style information from “global” style providers, such as the display’s Settings instance.

If you are using a StyleContext returned from WidgetExt::style_context(), you do not need to call this yourself.

display

a gdk::Display

Sets the scale to use when getting image assets for the style.

scale

scale

Sets the state to be used for style matching.

flags

state to represent

Converts the style context into a string representation.

The string representation always includes information about the name, state, id, visibility and style classes of the CSS node that is backing self. Depending on the flags, more information may be included.

This function is intended for testing and debugging of the CSS implementation in GTK. There are no guarantees about the format of the returned string, it may change.

flags

Flags that determine what to print

Returns

a newly allocated string representing self

Implementors