Struct gtk4::TextTagTable

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pub struct TextTagTable { /* private fields */ }
Expand description

The collection of tags in a TextBuffer

You may wish to begin by reading the text widget conceptual overview, which gives an overview of all the objects and data types related to the text widget and how they work together.

§GtkTextTagTables as GtkBuildable

The TextTagTable implementation of the Buildable interface supports adding tags by specifying “tag” as the “type” attribute of a <child> element.

An example of a UI definition fragment specifying tags:

<object class="GtkTextTagTable">
 <child type="tag">
   <object class="GtkTextTag"/>
 </child>
</object>

§Signals

§tag-added

Emitted every time a new tag is added in the TextTagTable.

§tag-changed

Emitted every time a tag in the TextTagTable changes.

§tag-removed

Emitted every time a tag is removed from the TextTagTable.

The @tag is still valid by the time the signal is emitted, but it is not associated with a tag table any more.

§Implements

[trait@glib::ObjectExt], BuildableExt

Implementations§

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impl TextTagTable

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pub fn new() -> TextTagTable

Creates a new TextTagTable.

The table contains no tags by default.

§Returns

a new TextTagTable

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pub fn add(&self, tag: &impl IsA<TextTag>) -> bool

Add a tag to the table.

The tag is assigned the highest priority in the table.

@tag must not be in a tag table already, and may not have the same name as an already-added tag.

§tag

a TextTag

§Returns

true on success.

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pub fn foreach<P: FnMut(&TextTag)>(&self, func: P)

Calls @func on each tag in @self, with user data @data.

Note that the table may not be modified while iterating over it (you can’t add/remove tags).

§func

a function to call on each tag

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pub fn size(&self) -> i32

Returns the size of the table (number of tags)

§Returns

number of tags in @self

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pub fn lookup(&self, name: &str) -> Option<TextTag>

Look up a named tag.

§name

name of a tag

§Returns

The tag

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pub fn remove(&self, tag: &impl IsA<TextTag>)

Remove a tag from the table.

If a TextBuffer has @self as its tag table, the tag is removed from the buffer. The table’s reference to the tag is removed, so the tag will end up destroyed if you don’t have a reference to it.

§tag

a TextTag

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pub fn connect_tag_added<F: Fn(&Self, &TextTag) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted every time a new tag is added in the TextTagTable.

§tag

the added tag.

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pub fn connect_tag_changed<F: Fn(&Self, &TextTag, bool) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted every time a tag in the TextTagTable changes.

§tag

the changed tag.

§size_changed

whether the change affects the TextView layout.

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pub fn connect_tag_removed<F: Fn(&Self, &TextTag) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted every time a tag is removed from the TextTagTable.

The @tag is still valid by the time the signal is emitted, but it is not associated with a tag table any more.

§tag

the removed tag.

Trait Implementations§

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impl Clone for TextTagTable

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for TextTagTable

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

Formats the value using the given formatter. Read more
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impl Default for TextTagTable

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl HasParamSpec for TextTagTable

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type ParamSpec = ParamSpecObject

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type SetValue = TextTagTable

Preferred value to be used as setter for the associated ParamSpec.
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type BuilderFn = fn(_: &str) -> ParamSpecObjectBuilder<'_, TextTagTable>

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for TextTagTable

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

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Ord for TextTagTable

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

This method returns an Ordering between self and other. Read more
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fn max(self, other: Self) -> Self
where Self: Sized,

Compares and returns the maximum of two values. Read more
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fn min(self, other: Self) -> Self
where Self: Sized,

Compares and returns the minimum of two values. Read more
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fn clamp(self, min: Self, max: Self) -> Self
where Self: Sized + PartialOrd,

Restrict a value to a certain interval. Read more
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impl ParentClassIs for TextTagTable

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

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

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<OT: ObjectType> PartialOrd<OT> for TextTagTable

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

This method returns an ordering between self and other values if one exists. Read more
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fn lt(&self, other: &Rhs) -> bool

This method tests less than (for self and other) and is used by the < operator. Read more
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fn le(&self, other: &Rhs) -> bool

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more
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fn gt(&self, other: &Rhs) -> bool

This method tests greater than (for self and other) and is used by the > operator. Read more
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fn ge(&self, other: &Rhs) -> bool

This method tests greater than or equal to (for self and other) and is used by the >= operator. Read more
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impl StaticType for TextTagTable

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for TextTagTable

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impl IsA<Buildable> for TextTagTable

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impl<O> GObjectPropertyExpressionExt for O
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fn property_expression(&self, property_name: &str) -> PropertyExpression

Create an expression looking up an object’s property.
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Create an expression looking up an object’s property with a weak reference.
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Get the ParamSpec of the property property_name of this object.
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Unblock a given signal handler.
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Connect to the signal signal_name on this object. Read more
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fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.
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Connect to the notify signal of the object. Read more
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Connect to the notify signal of the object. Read more
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Connect to the notify signal of the object. Read more
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fn notify(&self, property_name: &str)

Notify that the given property has changed its value. Read more
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Downgrade this object to a weak reference.
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