Struct gtk4::builders::LabelBuilder

pub struct LabelBuilder { /* private fields */ }

A builder-pattern type to construct Label objects.

Implementations

impl LabelBuilder

pub fn new() -> Self

Create a new LabelBuilder.

pub fn build(self) -> Label

Build the Label.

pub fn attributes(self, attributes: &AttrList) -> Self

A list of style attributes to apply to the text of the label.

pub fn ellipsize(self, ellipsize: EllipsizeMode) -> Self

The preferred place to ellipsize the string, if the label does not have enough room to display the entire string.

Note that setting this property to a value other than pango::EllipsizeMode::None has the side-effect that the label requests only enough space to display the ellipsis “…”. In particular, this means that ellipsizing labels do not work well in notebook tabs, unless the property::NotebookPage::tab-expand child property is set to true. Other ways to set a label’s width are WidgetExt::set_size_request() and Label::set_width_chars().

pub fn extra_menu(self, extra_menu: &impl IsA<MenuModel>) -> Self

A menu model whose contents will be appended to the context menu.

pub fn justify(self, justify: Justification) -> Self

The alignment of the lines in the text of the label, relative to each other.

This does not affect the alignment of the label within its allocation. See property::Label::xalign for that.

pub fn label(self, label: &str) -> Self

The contents of the label.

If the string contains Pango markup (see parse_markup()), you will have to set the property::Label::use-markup property to true in order for the label to display the markup attributes. See also Label::set_markup() for a convenience function that sets both this property and the property::Label::use-markup property at the same time.

If the string contains underlines acting as mnemonics, you will have to set the property::Label::use-underline property to true in order for the label to display them.

pub fn lines(self, lines: i32) -> Self

The number of lines to which an ellipsized, wrapping label should be limited.

This property has no effect if the label is not wrapping or ellipsized. Set this property to -1 if you don’t want to limit the number of lines.

pub fn max_width_chars(self, max_width_chars: i32) -> Self

The desired maximum width of the label, in characters.

If this property is set to -1, the width will be calculated automatically.

See the section on text layout for details of how property::Label::width-chars and property::Label::max-width-chars determine the width of ellipsized and wrapped labels.

pub fn mnemonic_widget(self, mnemonic_widget: &impl IsA<Widget>) -> Self

The widget to be activated when the labels mnemonic key is pressed.

pub fn natural_wrap_mode(self, natural_wrap_mode: NaturalWrapMode) -> Self

Available on crate feature v4_6 only.

Select the line wrapping for the natural size request.

This only affects the natural size requested. For the actual wrapping used, see the property::Label::wrap-mode property.

The default is NaturalWrapMode::Inherit, which inherits the behavior of the property::Label::wrap-mode property.

pub fn selectable(self, selectable: bool) -> Self

Whether the label text can be selected with the mouse.

pub fn single_line_mode(self, single_line_mode: bool) -> Self

Whether the label is in single line mode.

In single line mode, the height of the label does not depend on the actual text, it is always set to ascent + descent of the font. This can be an advantage in situations where resizing the label because of text changes would be distracting, e.g. in a statusbar.

pub fn use_markup(self, use_markup: bool) -> Self

true if the text of the label includes Pango markup.

See parse_markup().

pub fn use_underline(self, use_underline: bool) -> Self

true if the text of the label indicates a mnemonic with _.

pub fn width_chars(self, width_chars: i32) -> Self

The desired width of the label, in characters.

If this property is set to -1, the width will be calculated automatically.

See the section on text layout for details of how property::Label::width-chars and property::Label::max-width-chars determine the width of ellipsized and wrapped labels.

pub fn wrap(self, wrap: bool) -> Self

true if the label text will wrap if it gets too wide.

pub fn wrap_mode(self, wrap_mode: WrapMode) -> Self

Controls how the line wrapping is done.

This only affects the formatting if line wrapping is on (see the property::Label::wrap property). The default is pango::WrapMode::Word, which means wrap on word boundaries.

For sizing behavior, also consider the property::Label::natural-wrap-mode property.

pub fn xalign(self, xalign: f32) -> Self

The horizontal alignment of the label text inside its size allocation.

Compare this to property::Widget::halign, which determines how the labels size allocation is positioned in the space available for the label.

pub fn yalign(self, yalign: f32) -> Self

The vertical alignment of the label text inside its size allocation.

Compare this to property::Widget::valign, which determines how the labels size allocation is positioned in the space available for the label.

pub fn can_focus(self, can_focus: bool) -> Self

Whether the widget or any of its descendents can accept the input focus.

This property is meant to be set by widget implementations, typically in their instance init function.

pub fn can_target(self, can_target: bool) -> Self

Whether the widget can receive pointer events.

pub fn css_classes(self, css_classes: Vec<String>) -> Self

A list of css classes applied to this widget.

pub fn css_name(self, css_name: &str) -> Self

The name of this widget in the CSS tree.

This property is meant to be set by widget implementations, typically in their instance init function.

pub fn cursor(self, cursor: &Cursor) -> Self

The cursor used by @widget.

pub fn focus_on_click(self, focus_on_click: bool) -> Self

Whether the widget should grab focus when it is clicked with the mouse.

This property is only relevant for widgets that can take focus.

pub fn focusable(self, focusable: bool) -> Self

Whether this widget itself will accept the input focus.

pub fn halign(self, halign: Align) -> Self

How to distribute horizontal space if widget gets extra space.

pub fn has_tooltip(self, has_tooltip: bool) -> Self

Enables or disables the emission of the ::query-tooltip signal on @widget.

A value of true indicates that @widget can have a tooltip, in this case the widget will be queried using signal::Widget::query-tooltip to determine whether it will provide a tooltip or not.

pub fn height_request(self, height_request: i32) -> Self

Override for height request of the widget.

If this is -1, the natural request will be used.

pub fn hexpand(self, hexpand: bool) -> Self

Whether to expand horizontally.

pub fn hexpand_set(self, hexpand_set: bool) -> Self

Whether to use the hexpand property.

pub fn layout_manager(self, layout_manager: &impl IsA<LayoutManager>) -> Self

The LayoutManager instance to use to compute the preferred size of the widget, and allocate its children.

This property is meant to be set by widget implementations, typically in their instance init function.

pub fn margin_bottom(self, margin_bottom: i32) -> Self

Margin on bottom side of widget.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from WidgetExt::set_size_request() for example.

pub fn margin_end(self, margin_end: i32) -> Self

Margin on end of widget, horizontally.

This property supports left-to-right and right-to-left text directions.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from WidgetExt::set_size_request() for example.

pub fn margin_start(self, margin_start: i32) -> Self

Margin on start of widget, horizontally.

This property supports left-to-right and right-to-left text directions.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from WidgetExt::set_size_request() for example.

pub fn margin_top(self, margin_top: i32) -> Self

Margin on top side of widget.

This property adds margin outside of the widget’s normal size request, the margin will be added in addition to the size from WidgetExt::set_size_request() for example.

pub fn name(self, name: &str) -> Self

The name of the widget.

pub fn opacity(self, opacity: f64) -> Self

The requested opacity of the widget.

pub fn overflow(self, overflow: Overflow) -> Self

How content outside the widget’s content area is treated.

This property is meant to be set by widget implementations, typically in their instance init function.

pub fn receives_default(self, receives_default: bool) -> Self

Whether the widget will receive the default action when it is focused.

pub fn sensitive(self, sensitive: bool) -> Self

Whether the widget responds to input.

pub fn tooltip_markup(self, tooltip_markup: &str) -> Self

Sets the text of tooltip to be the given string, which is marked up with Pango markup.

Also see Tooltip::set_markup().

This is a convenience property which will take care of getting the tooltip shown if the given string is not None: property::Widget::has-tooltip will automatically be set to true and there will be taken care of signal::Widget::query-tooltip in the default signal handler.

Note that if both property::Widget::tooltip-text and property::Widget::tooltip-markup are set, the last one wins.

pub fn tooltip_text(self, tooltip_text: &str) -> Self

Sets the text of tooltip to be the given string.

Also see Tooltip::set_text().

This is a convenience property which will take care of getting the tooltip shown if the given string is not None: property::Widget::has-tooltip will automatically be set to true and there will be taken care of signal::Widget::query-tooltip in the default signal handler.

Note that if both property::Widget::tooltip-text and property::Widget::tooltip-markup are set, the last one wins.

pub fn valign(self, valign: Align) -> Self

How to distribute vertical space if widget gets extra space.

pub fn vexpand(self, vexpand: bool) -> Self

Whether to expand vertically.

pub fn vexpand_set(self, vexpand_set: bool) -> Self

Whether to use the vexpand property.

pub fn visible(self, visible: bool) -> Self

Whether the widget is visible.

pub fn width_request(self, width_request: i32) -> Self

Override for width request of the widget.

If this is -1, the natural request will be used.

pub fn accessible_role(self, accessible_role: AccessibleRole) -> Self

The accessible role of the given Accessible implementation.

The accessible role cannot be changed once set.

Trait Implementations

impl Clone for LabelBuilder

fn clone(&self) -> LabelBuilder

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for LabelBuilder

fn default() -> LabelBuilder

Returns the “default value” for a type.