Struct gtk4::Widget

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

The base class for all widgets.

Widget is the base class all widgets in GTK derive from. It manages the widget lifecycle, layout, states and style.

§Height-for-width Geometry Management

GTK uses a height-for-width (and width-for-height) geometry management system. Height-for-width means that a widget can change how much vertical space it needs, depending on the amount of horizontal space that it is given (and similar for width-for-height). The most common example is a label that reflows to fill up the available width, wraps to fewer lines, and therefore needs less height.

Height-for-width geometry management is implemented in GTK by way of two virtual methods:

There are some important things to keep in mind when implementing height-for-width and when using it in widget implementations.

If you implement a direct Widget subclass that supports height-for-width or width-for-height geometry management for itself or its child widgets, the WidgetImpl::request_mode() virtual function must be implemented as well and return the widget’s preferred request mode. The default implementation of this virtual function returns SizeRequestMode::ConstantSize, which means that the widget will only ever get -1 passed as the for_size value to its WidgetImpl::measure() implementation.

The geometry management system will query a widget hierarchy in only one orientation at a time. When widgets are initially queried for their minimum sizes it is generally done in two initial passes in the SizeRequestMode chosen by the toplevel.

For example, when queried in the normal SizeRequestMode::HeightForWidth mode:

First, the default minimum and natural width for each widget in the interface will be computed using WidgetExt::measure() with an orientation of Orientation::Horizontal and a for_size of -1. Because the preferred widths for each widget depend on the preferred widths of their children, this information propagates up the hierarchy, and finally a minimum and natural width is determined for the entire toplevel. Next, the toplevel will use the minimum width to query for the minimum height contextual to that width using WidgetExt::measure() with an orientation of Orientation::Vertical and a for_size of the just computed width. This will also be a highly recursive operation. The minimum height for the minimum width is normally used to set the minimum size constraint on the toplevel.

After the toplevel window has initially requested its size in both dimensions it can go on to allocate itself a reasonable size (or a size previously specified with GtkWindowExt::set_default_size()). During the recursive allocation process it’s important to note that request cycles will be recursively executed while widgets allocate their children. Each widget, once allocated a size, will go on to first share the space in one orientation among its children and then request each child’s height for its target allocated width or its width for allocated height, depending. In this way a Widget will typically be requested its size a number of times before actually being allocated a size. The size a widget is finally allocated can of course differ from the size it has requested. For this reason, Widget caches a small number of results to avoid re-querying for the same sizes in one allocation cycle.

If a widget does move content around to intelligently use up the allocated size then it must support the request in both SizeRequestModes even if the widget in question only trades sizes in a single orientation.

For instance, a Label that does height-for-width word wrapping will not expect to have WidgetImpl::measure() with an orientation of Orientation::Vertical called because that call is specific to a width-for-height request. In this case the label must return the height required for its own minimum possible width. By following this rule any widget that handles height-for-width or width-for-height requests will always be allocated at least enough space to fit its own content.

Here are some examples of how a SizeRequestMode::HeightForWidth widget generally deals with width-for-height requests:

⚠️ The following code is in c ⚠️

static void
foo_widget_measure (GtkWidget      *widget,
                    GtkOrientation  orientation,
                    int             for_size,
                    int            *minimum_size,
                    int            *natural_size,
                    int            *minimum_baseline,
                    int            *natural_baseline)
{
  if (orientation == GTK_ORIENTATION_HORIZONTAL)
    {
      // Calculate minimum and natural width
    }
  else // VERTICAL
    {
      if (i_am_in_height_for_width_mode)
        {
          int min_width, dummy;

          // First, get the minimum width of our widget
          GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_HORIZONTAL, -1,
                                                  &min_width, &dummy, &dummy, &dummy);

          // Now use the minimum width to retrieve the minimum and natural height to display
          // that width.
          GTK_WIDGET_GET_CLASS (widget)->measure (widget, GTK_ORIENTATION_VERTICAL, min_width,
                                                  minimum_size, natural_size, &dummy, &dummy);
        }
      else
        {
          // ... some widgets do both.
        }
    }
}

Often a widget needs to get its own request during size request or allocation. For example, when computing height it may need to also compute width. Or when deciding how to use an allocation, the widget may need to know its natural size. In these cases, the widget should be careful to call its virtual methods directly, like in the code example above.

It will not work to use the wrapper function WidgetExt::measure() inside your own WidgetImpl::size_allocate() implementation. These return a request adjusted by SizeGroup, the widget’s align and expand flags, as well as its CSS style.

If a widget used the wrappers inside its virtual method implementations, then the adjustments (such as widget margins) would be applied twice. GTK therefore does not allow this and will warn if you try to do it.

Of course if you are getting the size request for another widget, such as a child widget, you must use WidgetExt::measure(); otherwise, you would not properly consider widget margins, SizeGroup, and so forth.

GTK also supports baseline vertical alignment of widgets. This means that widgets are positioned such that the typographical baseline of widgets in the same row are aligned. This happens if a widget supports baselines, has a vertical alignment using baselines, and is inside a widget that supports baselines and has a natural “row” that it aligns to the baseline, or a baseline assigned to it by the grandparent.

Baseline alignment support for a widget is also done by the WidgetImpl::measure() virtual function. It allows you to report both a minimum and natural size.

If a widget ends up baseline aligned it will be allocated all the space in the parent as if it was Align::Fill, but the selected baseline can be found via WidgetExt::baseline(). If the baseline has a value other than -1 you need to align the widget such that the baseline appears at the position.

§GtkWidget as GtkBuildable

The Widget implementation of the Buildable interface supports various custom elements to specify additional aspects of widgets that are not directly expressed as properties.

If the widget uses a LayoutManager, Widget supports a custom <layout> element, used to define layout properties:

<object class="GtkGrid" id="my_grid">
  <child>
    <object class="GtkLabel" id="label1">
      <property name="label">Description</property>
      <layout>
        <property name="column">0</property>
        <property name="row">0</property>
        <property name="row-span">1</property>
        <property name="column-span">1</property>
      </layout>
    </object>
  </child>
  <child>
    <object class="GtkEntry" id="description_entry">
      <layout>
        <property name="column">1</property>
        <property name="row">0</property>
        <property name="row-span">1</property>
        <property name="column-span">1</property>
      </layout>
    </object>
  </child>
</object>

Widget allows style information such as style classes to be associated with widgets, using the custom <style> element:

<object class="GtkButton" id="button1">
  <style>
    <class name="my-special-button-class"/>
    <class name="dark-button"/>
  </style>
</object>

Widget allows defining accessibility information, such as properties, relations, and states, using the custom <accessibility> element:

<object class="GtkButton" id="button1">
  <accessibility>
    <property name="label">Download</property>
    <relation name="labelled-by">label1</relation>
  </accessibility>
</object>

§Building composite widgets from template XML

GtkWidget exposes some facilities to automate the procedure of creating composite widgets using “templates”.

To create composite widgets with Builder XML, one must associate the interface description with the widget class at class initialization time using WidgetClassExt::set_template().

The interface description semantics expected in composite template descriptions is slightly different from regular Builder XML.

Unlike regular interface descriptions, WidgetClassExt::set_template() will expect a <template> tag as a direct child of the toplevel <interface> tag. The <template> tag must specify the “class” attribute which must be the type name of the widget. Optionally, the “parent” attribute may be specified to specify the direct parent type of the widget type; this is ignored by Builder but can be used by UI design tools to introspect what kind of properties and internal children exist for a given type when the actual type does not exist.

The XML which is contained inside the <template> tag behaves as if it were added to the <object> tag defining the widget itself. You may set properties on a widget by inserting <property> tags into the <template> tag, and also add <child> tags to add children and extend a widget in the normal way you would with <object> tags.

Additionally, <object> tags can also be added before and after the initial <template> tag in the normal way, allowing one to define auxiliary objects which might be referenced by other widgets declared as children of the <template> tag.

Since, unlike the <object> tag, the <template> tag does not contain an “id” attribute, if you need to refer to the instance of the object itself that the template will create, simply refer to the template class name in an applicable element content.

Here is an example of a template definition, which includes an example of this in the <signal> tag:

<interface>
  <template class="FooWidget" parent="GtkBox">
    <property name="orientation">horizontal</property>
    <property name="spacing">4</property>
    <child>
      <object class="GtkButton" id="hello_button">
        <property name="label">Hello World</property>
        <signal name="clicked" handler="hello_button_clicked" object="FooWidget" swapped="yes"/>
      </object>
    </child>
    <child>
      <object class="GtkButton" id="goodbye_button">
        <property name="label">Goodbye World</property>
      </object>
    </child>
  </template>
</interface>

Typically, you’ll place the template fragment into a file that is bundled with your project, using GResource. In order to load the template, you need to call WidgetClassExt::set_template_from_resource() from the class initialization of your Widget type:

⚠️ The following code is in c ⚠️

static void
foo_widget_class_init (FooWidgetClass *klass)
{
  // ...

  gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
                                               "/com/example/ui/foowidget.ui");
}

You will also need to call Gtk::Widget::init_template() from the instance initialization function:

⚠️ The following code is in c ⚠️

static void
foo_widget_init (FooWidget *self)
{
  gtk_widget_init_template (GTK_WIDGET (self));

  // Initialize the rest of the widget...
}

as well as calling Gtk::Widget::dispose_template() from the dispose function:

⚠️ The following code is in c ⚠️

static void
foo_widget_dispose (GObject *gobject)
{
  FooWidget *self = FOO_WIDGET (gobject);

  // Dispose objects for which you have a reference...

  // Clear the template children for this widget type
  gtk_widget_dispose_template (GTK_WIDGET (self), FOO_TYPE_WIDGET);

  G_OBJECT_CLASS (foo_widget_parent_class)->dispose (gobject);
}

You can access widgets defined in the template using the Gtk::Widget::get_template_child() function, but you will typically declare a pointer in the instance private data structure of your type using the same name as the widget in the template definition, and call [WidgetClassExt::bind_template_child_full()][crate::subclass::prelude::WidgetClassExt::bind_template_child_full()] (or one of its wrapper macros widget_class_bind_template_child() and widget_class_bind_template_child_private()) with that name, e.g.

⚠️ The following code is in c ⚠️

typedef struct {
  GtkWidget *hello_button;
  GtkWidget *goodbye_button;
} FooWidgetPrivate;

G_DEFINE_TYPE_WITH_PRIVATE (FooWidget, foo_widget, GTK_TYPE_BOX)

static void
foo_widget_dispose (GObject *gobject)
{
  gtk_widget_dispose_template (GTK_WIDGET (gobject), FOO_TYPE_WIDGET);

  G_OBJECT_CLASS (foo_widget_parent_class)->dispose (gobject);
}

static void
foo_widget_class_init (FooWidgetClass *klass)
{
  // ...
  G_OBJECT_CLASS (klass)->dispose = foo_widget_dispose;

  gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
                                               "/com/example/ui/foowidget.ui");
  gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass),
                                                FooWidget, hello_button);
  gtk_widget_class_bind_template_child_private (GTK_WIDGET_CLASS (klass),
                                                FooWidget, goodbye_button);
}

static void
foo_widget_init (FooWidget *widget)
{
  gtk_widget_init_template (GTK_WIDGET (widget));
}

You can also use [WidgetClassExt::bind_template_callback_full()][crate::subclass::prelude::WidgetClassExt::bind_template_callback_full()] (or is wrapper macro widget_class_bind_template_callback()) to connect a signal callback defined in the template with a function visible in the scope of the class, e.g.

⚠️ The following code is in c ⚠️

// the signal handler has the instance and user data swapped
// because of the swapped="yes" attribute in the template XML
static void
hello_button_clicked (FooWidget *self,
                      GtkButton *button)
{
  g_print ("Hello, world!\n");
}

static void
foo_widget_class_init (FooWidgetClass *klass)
{
  // ...
  gtk_widget_class_set_template_from_resource (GTK_WIDGET_CLASS (klass),
                                               "/com/example/ui/foowidget.ui");
  gtk_widget_class_bind_template_callback (GTK_WIDGET_CLASS (klass), hello_button_clicked);
}

This is an Abstract Base Class, you cannot instantiate it.

§Properties

§can-focus

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.

Readable | Writeable

§can-target

Whether the widget can receive pointer events.

Readable | Writeable

§css-classes

A list of css classes applied to this widget.

Readable | Writeable

§css-name

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.

Readable | Writeable | Construct Only

§cursor

The cursor used by @widget.

Readable | Writeable

§focus-on-click

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

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

Readable | Writeable

§focusable

Whether this widget itself will accept the input focus.

Readable | Writeable

§halign

How to distribute horizontal space if widget gets extra space.

Readable | Writeable

§has-default

Whether the widget is the default widget.

Readable

§has-focus

Whether the widget has the input focus.

Readable

§has-tooltip

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 query-tooltip to determine whether it will provide a tooltip or not.

Readable | Writeable

§height-request

Override for height request of the widget.

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

Readable | Writeable

§hexpand

Whether to expand horizontally.

Readable | Writeable

§hexpand-set

Whether to use the hexpand property.

Readable | Writeable

§layout-manager

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.

Readable | Writeable

§margin-bottom

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.

Readable | Writeable

§margin-end

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.

Readable | Writeable

§margin-start

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.

Readable | Writeable

§margin-top

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.

Readable | Writeable

§name

The name of the widget.

Readable | Writeable

§opacity

The requested opacity of the widget.

Readable | Writeable

§overflow

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.

Readable | Writeable

§parent

The parent widget of this widget.

Readable

§receives-default

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

Readable | Writeable

§root

The Root widget of the widget tree containing this widget.

This will be None if the widget is not contained in a root widget.

Readable

§scale-factor

The scale factor of the widget.

Readable

§sensitive

Whether the widget responds to input.

Readable | Writeable

§tooltip-markup

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: has-tooltip will automatically be set to true and there will be taken care of query-tooltip in the default signal handler.

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

Readable | Writeable

§tooltip-text

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: has-tooltip will automatically be set to true and there will be taken care of query-tooltip in the default signal handler.

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

Readable | Writeable

§valign

How to distribute vertical space if widget gets extra space.

Readable | Writeable

§vexpand

Whether to expand vertically.

Readable | Writeable

§vexpand-set

Whether to use the vexpand property.

Readable | Writeable

§visible

Whether the widget is visible.

Readable | Writeable

§width-request

Override for width request of the widget.

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

Readable | Writeable

Accessible

§accessible-role

The accessible role of the given Accessible implementation.

The accessible role cannot be changed once set.

Readable | Writeable

§Signals

§destroy

Signals that all holders of a reference to the widget should release the reference that they hold.

May result in finalization of the widget if all references are released.

This signal is not suitable for saving widget state.

§direction-changed

Emitted when the text direction of a widget changes.

§hide

Emitted when @widget is hidden.

§keynav-failed

Emitted if keyboard navigation fails.

See WidgetExt::keynav_failed() for details.

§map

Emitted when @widget is going to be mapped.

A widget is mapped when the widget is visible (which is controlled with visible) and all its parents up to the toplevel widget are also visible.

The ::map signal can be used to determine whether a widget will be drawn, for instance it can resume an animation that was stopped during the emission of unmap.

§mnemonic-activate

Emitted when a widget is activated via a mnemonic.

The default handler for this signal activates @widget if @group_cycling is false, or just makes @widget grab focus if @group_cycling is true.

§move-focus

Emitted when the focus is moved.

The ::move-focus signal is a keybinding signal.

The default bindings for this signal are Tab to move forward, and Shift+Tab to move backward.

Action

§query-tooltip

Emitted when the widget’s tooltip is about to be shown.

This happens when the has-tooltip property is true and the hover timeout has expired with the cursor hovering “above” @widget; or emitted when @widget got focus in keyboard mode.

Using the given coordinates, the signal handler should determine whether a tooltip should be shown for @widget. If this is the case true should be returned, false otherwise. Note that if @keyboard_mode is true, the values of @x and @y are undefined and should not be used.

The signal handler is free to manipulate @tooltip with the therefore destined function calls.

§realize

Emitted when @widget is associated with a gdk::Surface.

This means that WidgetExt::realize() has been called or the widget has been mapped (that is, it is going to be drawn).

§show

Emitted when @widget is shown.

§state-flags-changed

Emitted when the widget state changes.

See WidgetExt::state_flags().

§unmap

Emitted when @widget is going to be unmapped.

A widget is unmapped when either it or any of its parents up to the toplevel widget have been set as hidden.

As ::unmap indicates that a widget will not be shown any longer, it can be used to, for example, stop an animation on the widget.

§unrealize

Emitted when the gdk::Surface associated with @widget is destroyed.

This means that WidgetExt::unrealize() has been called or the widget has been unmapped (that is, it is going to be hidden).

§Implements

WidgetExt, [trait@glib::ObjectExt], AccessibleExt, BuildableExt, ConstraintTargetExt, WidgetExtManual, AccessibleExtManual

GLib type: GObject with reference counted clone semantics.

Implementations§

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impl Widget

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pub const NONE: Option<&'static Widget> = None

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pub fn default_direction() -> TextDirection

Obtains the current default reading direction.

See set_default_direction().

§Returns

the current default direction.

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pub fn set_default_direction(dir: TextDirection)

Sets the default reading direction for widgets.

See WidgetExt::set_direction().

§dir

the new default direction. This cannot be TextDirection::None.

Trait Implementations§

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impl Clone for Widget

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fn clone(&self) -> Self

Makes a clone of this shared reference.

This increments the strong reference count of the object. Dropping the object will decrement it again.

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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 Widget

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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 Display for Widget

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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 HasParamSpec for Widget

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type ParamSpec = ParamSpecObject

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type SetValue = Widget

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

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fn param_spec_builder() -> Self::BuilderFn

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impl Hash for Widget

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

Hashes the memory address of this object.

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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<T: WidgetImpl> IsSubclassable<T> for Widget

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fn class_init(class: &mut Class<Self>)

Override the virtual methods of this class for the given subclass and do other class initialization. Read more
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fn instance_init(instance: &mut InitializingObject<T>)

Instance specific initialization. Read more
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impl Ord for Widget

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

Comparison for two GObjects.

Compares the memory addresses of the provided objects.

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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 Widget

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

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

Equality for two GObjects.

Two GObjects are equal if their memory addresses are equal.

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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 Widget

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

Partial comparison for two GObjects.

Compares the memory addresses of the provided objects.

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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 Widget

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fn static_type() -> Type

Returns the type identifier of Self.
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impl Eq for Widget

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impl IsA<Accessible> for Widget

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impl IsA<Buildable> for Widget

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impl IsA<ConstraintTarget> for Widget

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impl IsA<Widget> for AboutDialog

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impl IsA<Widget> for ActionBar

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impl IsA<Widget> for Actionable

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impl IsA<Widget> for AppChooser

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impl IsA<Widget> for AppChooserButton

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impl IsA<Widget> for AppChooserDialog

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impl IsA<Widget> for AppChooserWidget

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impl IsA<Widget> for ApplicationWindow

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impl IsA<Widget> for AspectFrame

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impl IsA<Widget> for Assistant

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impl IsA<Widget> for Box

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impl IsA<Widget> for Button

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impl IsA<Widget> for Calendar

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impl IsA<Widget> for CellEditable

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impl IsA<Widget> for CellView

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impl IsA<Widget> for CenterBox

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impl IsA<Widget> for CheckButton

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impl IsA<Widget> for ColorButton

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impl IsA<Widget> for ColorChooserDialog

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impl IsA<Widget> for ColorChooserWidget

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impl IsA<Widget> for ColorDialogButton

Available on crate feature v4_10 only.
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impl IsA<Widget> for ColumnView

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impl IsA<Widget> for ComboBox

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impl IsA<Widget> for ComboBoxText

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impl IsA<Widget> for Dialog

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impl IsA<Widget> for DragIcon

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impl IsA<Widget> for DrawingArea

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impl IsA<Widget> for DropDown

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impl IsA<Widget> for Editable

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impl IsA<Widget> for EditableLabel

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impl IsA<Widget> for EmojiChooser

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impl IsA<Widget> for Entry

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impl IsA<Widget> for Expander

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impl IsA<Widget> for FileChooserDialog

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impl IsA<Widget> for FileChooserWidget

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impl IsA<Widget> for Fixed

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impl IsA<Widget> for FlowBox

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impl IsA<Widget> for FlowBoxChild

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impl IsA<Widget> for FontButton

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impl IsA<Widget> for FontChooserDialog

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impl IsA<Widget> for FontChooserWidget

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impl IsA<Widget> for FontDialogButton

Available on crate feature v4_10 only.
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impl IsA<Widget> for Frame

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impl IsA<Widget> for GLArea

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impl IsA<Widget> for GraphicsOffload

Available on crate feature v4_14 only.
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impl IsA<Widget> for Grid

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impl IsA<Widget> for GridView

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impl IsA<Widget> for HeaderBar

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impl IsA<Widget> for IconView

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impl IsA<Widget> for Image

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impl IsA<Widget> for InfoBar

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impl IsA<Widget> for Inscription

Available on crate feature v4_8 only.
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impl IsA<Widget> for Label

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impl IsA<Widget> for LevelBar

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impl IsA<Widget> for LinkButton

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impl IsA<Widget> for ListBase

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impl IsA<Widget> for ListBox

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impl IsA<Widget> for ListBoxRow

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impl IsA<Widget> for ListView

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impl IsA<Widget> for LockButton

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impl IsA<Widget> for MediaControls

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impl IsA<Widget> for MenuButton

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impl IsA<Widget> for MessageDialog

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impl IsA<Widget> for Native

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impl IsA<Widget> for Notebook

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impl IsA<Widget> for Overlay

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impl IsA<Widget> for PageSetupUnixDialog

Available on Linux only.
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impl IsA<Widget> for Paned

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impl IsA<Widget> for PasswordEntry

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impl IsA<Widget> for Picture

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impl IsA<Widget> for Popover

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impl IsA<Widget> for PopoverMenu

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impl IsA<Widget> for PopoverMenuBar

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impl IsA<Widget> for PrintUnixDialog

Available on Linux only.
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impl IsA<Widget> for ProgressBar

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impl IsA<Widget> for Range

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impl IsA<Widget> for Revealer

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impl IsA<Widget> for Root

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impl IsA<Widget> for Scale

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impl IsA<Widget> for ScaleButton

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impl IsA<Widget> for Scrollbar

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impl IsA<Widget> for ScrolledWindow

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impl IsA<Widget> for SearchEntry

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impl IsA<Widget> for Separator

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impl IsA<Widget> for ShortcutLabel

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impl IsA<Widget> for ShortcutsGroup

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impl IsA<Widget> for ShortcutsSection

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impl IsA<Widget> for ShortcutsShortcut

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impl IsA<Widget> for ShortcutsWindow

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impl IsA<Widget> for SpinButton

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impl IsA<Widget> for Spinner

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impl IsA<Widget> for Stack

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impl IsA<Widget> for StackSidebar

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impl IsA<Widget> for StackSwitcher

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impl IsA<Widget> for Statusbar

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impl IsA<Widget> for Switch

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impl IsA<Widget> for Text

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impl IsA<Widget> for TextView

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impl IsA<Widget> for ToggleButton

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impl IsA<Widget> for TreeExpander

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impl IsA<Widget> for TreeView

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impl IsA<Widget> for Video

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impl IsA<Widget> for Viewport

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impl IsA<Widget> for VolumeButton

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impl IsA<Widget> for Window

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impl IsA<Widget> for WindowControls

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impl IsA<Widget> for WindowHandle

Auto Trait Implementations§

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impl Freeze for Widget

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impl RefUnwindSafe for Widget

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impl !Send for Widget

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impl !Sync for Widget

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impl Unpin for Widget

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impl UnwindSafe for Widget

Blanket Implementations§

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impl<O> AccessibleExt for O
where O: IsA<Accessible>,

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fn announce(&self, message: &str, priority: AccessibleAnnouncementPriority)

Available on crate feature v4_14 only.
Requests the user’s screen reader to announce the given message. Read more
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fn accessible_parent(&self) -> Option<Accessible>

Available on crate feature v4_10 only.
Retrieves the accessible parent for an accessible object. Read more
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fn accessible_role(&self) -> AccessibleRole

Retrieves the accessible role of an accessible object. Read more
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fn at_context(&self) -> ATContext

Available on crate feature v4_10 only.
Retrieves the accessible implementation for the given Accessible. Read more
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fn bounds(&self) -> Option<(i32, i32, i32, i32)>

Available on crate feature v4_10 only.
Queries the coordinates and dimensions of this accessible Read more
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fn first_accessible_child(&self) -> Option<Accessible>

Available on crate feature v4_10 only.
Retrieves the first accessible child of an accessible object. Read more
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fn next_accessible_sibling(&self) -> Option<Accessible>

Available on crate feature v4_10 only.
Retrieves the next accessible sibling of an accessible object Read more
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fn platform_state(&self, state: AccessiblePlatformState) -> bool

Available on crate feature v4_10 only.
Query a platform state, such as focus. Read more
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fn reset_property(&self, property: AccessibleProperty)

Resets the accessible @property to its default value. Read more
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fn reset_relation(&self, relation: AccessibleRelation)

Resets the accessible @relation to its default value. Read more
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fn reset_state(&self, state: AccessibleState)

Resets the accessible @state to its default value. Read more
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fn set_accessible_parent( &self, parent: Option<&impl IsA<Accessible>>, next_sibling: Option<&impl IsA<Accessible>> )

Available on crate feature v4_10 only.
Sets the parent and sibling of an accessible object. Read more
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fn update_next_accessible_sibling( &self, new_sibling: Option<&impl IsA<Accessible>> )

Available on crate feature v4_10 only.
Updates the next accessible sibling of @self. Read more
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fn set_accessible_role(&self, accessible_role: AccessibleRole)

The accessible role of the given Accessible implementation. Read more
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fn connect_accessible_role_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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impl<O> AccessibleExtManual for O
where O: IsA<Accessible>,

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fn update_property(&self, properties: &[Property<'_>])

Updates an array of accessible properties. Read more
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fn update_relation(&self, relations: &[Relation<'_>])

Updates an array of accessible relations. Read more
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fn update_state(&self, states: &[State])

Updates an array of accessible states. Read more
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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<O> BuildableExt for O
where O: IsA<Buildable>,

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fn buildable_id(&self) -> Option<GString>

Gets the ID of the @self object. Read more
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impl<T> Cast for T
where T: ObjectType,

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fn upcast<T>(self) -> T
where T: ObjectType, Self: IsA<T>,

Upcasts an object to a superclass or interface T. Read more
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fn upcast_ref<T>(&self) -> &T
where T: ObjectType, Self: IsA<T>,

Upcasts an object to a reference of its superclass or interface T. Read more
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fn downcast<T>(self) -> Result<T, Self>
where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a subclass or interface implementor T. Read more
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fn downcast_ref<T>(&self) -> Option<&T>
where T: ObjectType, Self: MayDowncastTo<T>,

Tries to downcast to a reference of its subclass or interface implementor T. Read more
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fn dynamic_cast<T>(self) -> Result<T, Self>
where T: ObjectType,

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 upcast will do many checks at compile-time already. downcast will perform the same checks at runtime as dynamic_cast, but will also ensure some amount of compile-time safety. Read more
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fn dynamic_cast_ref<T>(&self) -> Option<&T>
where T: ObjectType,

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
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unsafe fn unsafe_cast<T>(self) -> T
where T: ObjectType,

Casts to T unconditionally. Read more
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unsafe fn unsafe_cast_ref<T>(&self) -> &T
where T: ObjectType,

Casts to &T unconditionally. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(_: *const GList, _: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GList, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GPtrArray, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec( _: *const GPtrArray, _: usize ) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GPtrArray, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *const GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(_: *const GSList, _: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(_: *const GSList, _: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GList, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec( ptr: *mut GPtrArray, num: usize ) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GPtrArray, num: usize) -> Vec<T>

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impl<T> FromGlibContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_container_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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unsafe fn from_glib_full_num_as_vec(ptr: *mut GSList, num: usize) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GPtrArray) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GPtrArray) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *const GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *const GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(_: *const GSList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(_: *const GSList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GList> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GList) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GPtrArray> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GPtrArray) -> Vec<T>

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impl<T> FromGlibPtrArrayContainerAsVec<<T as GlibPtrDefault>::GlibType, *mut GSList> for T

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unsafe fn from_glib_none_as_vec(ptr: *mut GSList) -> Vec<T>

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unsafe fn from_glib_container_as_vec(ptr: *mut GSList) -> Vec<T>

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unsafe fn from_glib_full_as_vec(ptr: *mut GSList) -> Vec<T>

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impl<O> GObjectPropertyExpressionExt for O
where O: IsA<Object>,

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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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fn property_expression_weak(&self, property_name: &str) -> PropertyExpression

Create an expression looking up an object’s property with a weak reference.
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fn this_expression(property_name: &str) -> PropertyExpression

Create an expression looking up a property in the bound this object.
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoClosureReturnValue for T
where T: Into<Value>,

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impl<U> IsSubclassableExt for U

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impl<T> ObjectExt for T
where T: ObjectType,

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fn is<U>(&self) -> bool
where U: StaticType,

Returns true if the object is an instance of (can be cast to) T.
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fn type_(&self) -> Type

Returns the type of the object.
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fn object_class(&self) -> &Class<Object>

Returns the ObjectClass of the object. Read more
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fn class(&self) -> &Class<T>
where T: IsClass,

Returns the class of the object.
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fn class_of<U>(&self) -> Option<&Class<U>>
where U: IsClass,

Returns the class of the object in the given type T. Read more
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fn interface<U>(&self) -> Option<InterfaceRef<'_, U>>
where U: IsInterface,

Returns the interface T of the object. Read more
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fn set_property(&self, property_name: &str, value: impl Into<Value>)

Sets the property property_name of the object to value value. Read more
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fn set_property_from_value(&self, property_name: &str, value: &Value)

Sets the property property_name of the object to value value. Read more
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fn set_properties(&self, property_values: &[(&str, &dyn ToValue)])

Sets multiple properties of the object at once. Read more
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fn set_properties_from_value(&self, property_values: &[(&str, Value)])

Sets multiple properties of the object at once. Read more
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fn property<V>(&self, property_name: &str) -> V
where V: for<'b> FromValue<'b> + 'static,

Gets the property property_name of the object and cast it to the type V. Read more
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fn property_value(&self, property_name: &str) -> Value

Gets the property property_name of the object. Read more
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fn has_property(&self, property_name: &str, type_: Option<Type>) -> bool

Check if the object has a property property_name of the given type_. Read more
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fn property_type(&self, property_name: &str) -> Option<Type>

Get the type of the property property_name of this object. Read more
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fn find_property(&self, property_name: &str) -> Option<ParamSpec>

Get the ParamSpec of the property property_name of this object.
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fn list_properties(&self) -> PtrSlice<ParamSpec>

Return all ParamSpec of the properties of this object.
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fn freeze_notify(&self) -> PropertyNotificationFreezeGuard

Freeze all property notifications until the return guard object is dropped. Read more
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unsafe fn set_qdata<QD>(&self, key: Quark, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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unsafe fn qdata<QD>(&self, key: Quark) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
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unsafe fn steal_qdata<QD>(&self, key: Quark) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
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unsafe fn set_data<QD>(&self, key: &str, value: QD)
where QD: 'static,

Set arbitrary data on this object with the given key. Read more
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unsafe fn data<QD>(&self, key: &str) -> Option<NonNull<QD>>
where QD: 'static,

Return previously set arbitrary data of this object with the given key. Read more
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unsafe fn steal_data<QD>(&self, key: &str) -> Option<QD>
where QD: 'static,

Retrieve previously set arbitrary data of this object with the given key. Read more
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fn block_signal(&self, handler_id: &SignalHandlerId)

Block a given signal handler. Read more
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fn unblock_signal(&self, handler_id: &SignalHandlerId)

Unblock a given signal handler.
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fn stop_signal_emission(&self, signal_id: SignalId, detail: Option<Quark>)

Stop emission of the currently emitted signal.
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fn stop_signal_emission_by_name(&self, signal_name: &str)

Stop emission of the currently emitted signal by the (possibly detailed) signal name.
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fn connect<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_name on this object. Read more
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fn connect_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + Send + Sync + 'static,

Connect to the signal signal_id on this object. Read more
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fn connect_local<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_name on this object. Read more
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fn connect_local_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value> + 'static,

Connect to the signal signal_id on this object. Read more
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unsafe fn connect_unsafe<F>( &self, signal_name: &str, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_name on this object. Read more
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unsafe fn connect_unsafe_id<F>( &self, signal_id: SignalId, details: Option<Quark>, after: bool, callback: F ) -> SignalHandlerId
where F: Fn(&[Value]) -> Option<Value>,

Connect to the signal signal_id on this object. Read more
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fn connect_closure( &self, signal_name: &str, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_name on this object. Read more
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fn connect_closure_id( &self, signal_id: SignalId, details: Option<Quark>, after: bool, closure: RustClosure ) -> SignalHandlerId

Connect a closure to the signal signal_id on this object. Read more
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fn watch_closure(&self, closure: &impl AsRef<Closure>)

Limits the lifetime of closure to the lifetime of the object. When the object’s reference count drops to zero, the closure will be invalidated. An invalidated closure will ignore any calls to invoke_with_values, or invoke when using Rust closures.
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fn emit<R>(&self, signal_id: SignalId, args: &[&dyn ToValue]) -> R

Emit signal by signal id. Read more
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fn emit_with_values(&self, signal_id: SignalId, args: &[Value]) -> Option<Value>

Same as Self::emit but takes Value for the arguments.
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fn emit_by_name<R>(&self, signal_name: &str, args: &[&dyn ToValue]) -> R

Emit signal by its name. Read more
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fn emit_by_name_with_values( &self, signal_name: &str, args: &[Value] ) -> Option<Value>

Emit signal by its name. Read more
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fn emit_by_name_with_details<R>( &self, signal_name: &str, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by its name with details. Read more
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fn emit_by_name_with_details_and_values( &self, signal_name: &str, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by its name with details. Read more
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fn emit_with_details<R>( &self, signal_id: SignalId, details: Quark, args: &[&dyn ToValue] ) -> R

Emit signal by signal id with details. Read more
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fn emit_with_details_and_values( &self, signal_id: SignalId, details: Quark, args: &[Value] ) -> Option<Value>

Emit signal by signal id with details. Read more
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fn disconnect(&self, handler_id: SignalHandlerId)

Disconnect a previously connected signal handler.
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fn connect_notify<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + Send + Sync + 'static,

Connect to the notify signal of the object. Read more
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fn connect_notify_local<F>(&self, name: Option<&str>, f: F) -> SignalHandlerId
where F: Fn(&T, &ParamSpec) + 'static,

Connect to the notify signal of the object. Read more
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unsafe fn connect_notify_unsafe<F>( &self, name: Option<&str>, f: F ) -> SignalHandlerId
where F: Fn(&T, &ParamSpec),

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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fn notify_by_pspec(&self, pspec: &ParamSpec)

Notify that the given property has changed its value. Read more
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fn downgrade(&self) -> WeakRef<T>

Downgrade this object to a weak reference.
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fn add_weak_ref_notify<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + Send + 'static,

Add a callback to be notified when the Object is disposed.
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fn add_weak_ref_notify_local<F>(&self, f: F) -> WeakRefNotify<T>
where F: FnOnce() + 'static,

Add a callback to be notified when the Object is disposed. Read more
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fn bind_property<'a, 'f, 't, O>( &'a self, source_property: &'a str, target: &'a O, target_property: &'a str ) -> BindingBuilder<'a, 'f, 't>
where O: ObjectType,

Bind property source_property on this object to the target_property on the target object. Read more
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fn ref_count(&self) -> u32

Returns the strong reference count of this object.
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unsafe fn run_dispose(&self)

Runs the dispose mechanism of the object. Read more
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impl<T> Property for T
where T: HasParamSpec,

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type Value = T

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impl<T> PropertyGet for T
where T: HasParamSpec,

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type Value = T

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fn get<R, F>(&self, f: F) -> R
where F: Fn(&<T as PropertyGet>::Value) -> R,

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impl<T> StaticTypeExt for T
where T: StaticType,

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fn ensure_type()

Ensures that the type has been registered with the type system.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T> TransparentType for T

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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T> TryFromClosureReturnValue for T
where T: for<'a> FromValue<'a> + StaticType + 'static,

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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<O> WidgetExt for O
where O: IsA<Widget>,

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fn action_set_enabled(&self, action_name: &str, enabled: bool)

Enable or disable an action installed with gtk_widget_class_install_action(). Read more
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fn activate(&self) -> bool

For widgets that can be “activated” (buttons, menu items, etc.), this function activates them. Read more
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fn activate_action( &self, name: &str, args: Option<&Variant> ) -> Result<(), BoolError>

Looks up the action in the action groups associated with @self and its ancestors, and activates it. Read more
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fn activate_default(&self)

Activates the default.activate action from @self.
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fn add_controller(&self, controller: impl IsA<EventController>)

Adds @controller to @self so that it will receive events. Read more
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fn add_css_class(&self, css_class: &str)

Adds a style class to @self. Read more
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fn add_mnemonic_label(&self, label: &impl IsA<Widget>)

Adds a widget to the list of mnemonic labels for this widget. Read more
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fn allocate( &self, width: i32, height: i32, baseline: i32, transform: Option<Transform> )

This function is only used by Widget subclasses, to assign a size, position and (optionally) baseline to their child widgets. Read more
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fn child_focus(&self, direction: DirectionType) -> bool

Called by widgets as the user moves around the window using keyboard shortcuts. Read more
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fn compute_bounds(&self, target: &impl IsA<Widget>) -> Option<Rect>

Computes the bounds for @self in the coordinate space of @target. Read more
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fn compute_expand(&self, orientation: Orientation) -> bool

Computes whether a container should give this widget extra space when possible. Read more
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fn compute_point( &self, target: &impl IsA<Widget>, point: &Point ) -> Option<Point>

Translates the given @point in @self’s coordinates to coordinates relative to @target’s coordinate system. Read more
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fn compute_transform(&self, target: &impl IsA<Widget>) -> Option<Matrix>

Computes a matrix suitable to describe a transformation from @self’s coordinate system into @target’s coordinate system. Read more
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fn contains(&self, x: f64, y: f64) -> bool

Tests if the point at (@x, @y) is contained in @self. Read more
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fn create_pango_context(&self) -> Context

Creates a new pango::Context with the appropriate font map, font options, font description, and base direction for drawing text for this widget. Read more
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fn create_pango_layout(&self, text: Option<&str>) -> Layout

Creates a new pango::Layout with the appropriate font map, font description, and base direction for drawing text for this widget. Read more
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fn drag_check_threshold( &self, start_x: i32, start_y: i32, current_x: i32, current_y: i32 ) -> bool

Checks to see if a drag movement has passed the GTK drag threshold. Read more
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fn error_bell(&self)

Notifies the user about an input-related error on this widget. Read more
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fn allocated_baseline(&self) -> i32

👎Deprecated: Since 4.12
Returns the baseline that has currently been allocated to @self. Read more
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fn allocated_height(&self) -> i32

👎Deprecated: Since 4.12
Returns the height that has currently been allocated to @self. Read more
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fn allocated_width(&self) -> i32

👎Deprecated: Since 4.12
Returns the width that has currently been allocated to @self. Read more
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fn allocation(&self) -> Allocation

👎Deprecated: Since 4.12
Retrieves the widget’s allocation. Read more
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fn ancestor(&self, widget_type: Type) -> Option<Widget>

Gets the first ancestor of @self with type @widget_type. Read more
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fn baseline(&self) -> i32

Available on crate feature v4_12 only.
Returns the baseline that has currently been allocated to @self. Read more
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fn can_focus(&self) -> bool

Determines whether the input focus can enter @self or any of its children. Read more
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fn can_target(&self) -> bool

Queries whether @self can be the target of pointer events. Read more
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fn is_child_visible(&self) -> bool

Gets the value set with gtk_widget_set_child_visible(). Read more
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fn clipboard(&self) -> Clipboard

Gets the clipboard object for @self. Read more
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fn color(&self) -> RGBA

Available on crate feature v4_10 only.
Gets the current foreground color for the widget’s CSS style. Read more
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fn css_classes(&self) -> Vec<GString>

Returns the list of style classes applied to @self. Read more
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fn css_name(&self) -> GString

Returns the CSS name that is used for @self. Read more
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fn cursor(&self) -> Option<Cursor>

Queries the cursor set on @self. Read more
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fn direction(&self) -> TextDirection

Gets the reading direction for a particular widget. Read more
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fn display(&self) -> Display

Get the gdk::Display for the toplevel window associated with this widget. Read more
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fn first_child(&self) -> Option<Widget>

Returns the widget’s first child. Read more
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fn focus_child(&self) -> Option<Widget>

Returns the current focus child of @self. Read more
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fn gets_focus_on_click(&self) -> bool

Returns whether the widget should grab focus when it is clicked with the mouse. Read more
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fn is_focusable(&self) -> bool

Determines whether @self can own the input focus. Read more
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fn font_map(&self) -> Option<FontMap>

Gets the font map of @self. Read more
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fn font_options(&self) -> Option<FontOptions>

👎Deprecated: Since 4.16
Returns the cairo::FontOptions of widget. Read more
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fn frame_clock(&self) -> Option<FrameClock>

Obtains the frame clock for a widget. Read more
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fn halign(&self) -> Align

Gets the horizontal alignment of @self. Read more
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fn has_tooltip(&self) -> bool

Returns the current value of the has-tooltip property. Read more
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fn height(&self) -> i32

Returns the content height of the widget. Read more
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fn hexpands(&self) -> bool

Gets whether the widget would like any available extra horizontal space. Read more
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fn is_hexpand_set(&self) -> bool

Gets whether gtk_widget_set_hexpand() has been used to explicitly set the expand flag on this widget. Read more
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fn last_child(&self) -> Option<Widget>

Returns the widget’s last child. Read more
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fn layout_manager(&self) -> Option<LayoutManager>

Retrieves the layout manager used by @self. Read more
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fn is_mapped(&self) -> bool

Whether the widget is mapped. Read more
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fn margin_bottom(&self) -> i32

Gets the bottom margin of @self. Read more
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fn margin_end(&self) -> i32

Gets the end margin of @self. Read more
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fn margin_start(&self) -> i32

Gets the start margin of @self. Read more
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fn margin_top(&self) -> i32

Gets the top margin of @self. Read more
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fn widget_name(&self) -> GString

Retrieves the name of a widget. Read more
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fn native(&self) -> Option<Native>

Returns the nearest Native ancestor of @self. Read more
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fn next_sibling(&self) -> Option<Widget>

Returns the widget’s next sibling. Read more
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fn opacity(&self) -> f64

#Fetches the requested opacity for this widget. Read more
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fn overflow(&self) -> Overflow

Returns the widget’s overflow value. Read more
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fn pango_context(&self) -> Context

Gets a pango::Context with the appropriate font map, font description, and base direction for this widget. Read more
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fn parent(&self) -> Option<Widget>

Returns the parent widget of @self. Read more
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fn preferred_size(&self) -> (Requisition, Requisition)

Retrieves the minimum and natural size of a widget, taking into account the widget’s preference for height-for-width management. Read more
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fn prev_sibling(&self) -> Option<Widget>

Returns the widget’s previous sibling. Read more
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fn primary_clipboard(&self) -> Clipboard

Gets the primary clipboard of @self. Read more
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fn is_realized(&self) -> bool

Determines whether @self is realized. Read more
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fn receives_default(&self) -> bool

Determines whether @self is always treated as the default widget within its toplevel when it has the focus, even if another widget is the default. Read more
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fn request_mode(&self) -> SizeRequestMode

Gets whether the widget prefers a height-for-width layout or a width-for-height layout. Read more
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fn root(&self) -> Option<Root>

Returns the Root widget of @self. Read more
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fn scale_factor(&self) -> i32

Retrieves the internal scale factor that maps from window coordinates to the actual device pixels. Read more
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fn get_sensitive(&self) -> bool

Returns the widget’s sensitivity. Read more
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fn settings(&self) -> Settings

Gets the settings object holding the settings used for this widget. Read more
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fn size(&self, orientation: Orientation) -> i32

Returns the content width or height of the widget. Read more
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fn size_request(&self) -> (i32, i32)

Gets the size request that was explicitly set for the widget using gtk_widget_set_size_request(). Read more
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fn state_flags(&self) -> StateFlags

Returns the widget state as a flag set. Read more
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fn style_context(&self) -> StyleContext

👎Deprecated: Since 4.10
Returns the style context associated to @self. Read more
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fn tooltip_markup(&self) -> Option<GString>

Gets the contents of the tooltip for @self. Read more
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fn tooltip_text(&self) -> Option<GString>

Gets the contents of the tooltip for @self. Read more
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fn valign(&self) -> Align

Gets the vertical alignment of @self. Read more
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fn vexpands(&self) -> bool

Gets whether the widget would like any available extra vertical space. Read more
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fn is_vexpand_set(&self) -> bool

Gets whether gtk_widget_set_vexpand() has been used to explicitly set the expand flag on this widget. Read more
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fn get_visible(&self) -> bool

Determines whether the widget is visible. Read more
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fn width(&self) -> i32

Returns the content width of the widget. Read more
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fn grab_focus(&self) -> bool

Causes @self to have the keyboard focus for the Window it’s inside. Read more
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fn has_css_class(&self, css_class: &str) -> bool

Returns whether @css_class is currently applied to @self. Read more
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fn has_default(&self) -> bool

Determines whether @self is the current default widget within its toplevel. Read more
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fn has_focus(&self) -> bool

Determines if the widget has the global input focus. Read more
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fn has_visible_focus(&self) -> bool

Determines if the widget should show a visible indication that it has the global input focus. Read more
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fn hide(&self)

👎Deprecated: Since 4.10
Reverses the effects of gtk_widget_show(). Read more
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fn in_destruction(&self) -> bool

Returns whether the widget is currently being destroyed. Read more
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fn insert_action_group(&self, name: &str, group: Option<&impl IsA<ActionGroup>>)

Inserts @group into @self. Read more
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fn insert_after( &self, parent: &impl IsA<Widget>, previous_sibling: Option<&impl IsA<Widget>> )

Inserts @self into the child widget list of @parent. Read more
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fn insert_before( &self, parent: &impl IsA<Widget>, next_sibling: Option<&impl IsA<Widget>> )

Inserts @self into the child widget list of @parent. Read more
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fn is_ancestor(&self, ancestor: &impl IsA<Widget>) -> bool

Determines whether @self is somewhere inside @ancestor, possibly with intermediate containers. Read more
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fn is_drawable(&self) -> bool

Determines whether @self can be drawn to. Read more
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fn is_focus(&self) -> bool

Determines if the widget is the focus widget within its toplevel. Read more
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fn is_sensitive(&self) -> bool

Returns the widget’s effective sensitivity. Read more
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fn is_visible(&self) -> bool

Determines whether the widget and all its parents are marked as visible. Read more
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fn keynav_failed(&self, direction: DirectionType) -> bool

Emits the ::keynav-failed signal on the widget. Read more
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fn list_mnemonic_labels(&self) -> Vec<Widget>

Returns the widgets for which this widget is the target of a mnemonic. Read more
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fn map(&self)

Causes a widget to be mapped if it isn’t already. Read more
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fn measure( &self, orientation: Orientation, for_size: i32 ) -> (i32, i32, i32, i32)

Measures @self in the orientation @orientation and for the given @for_size. Read more
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fn mnemonic_activate(&self, group_cycling: bool) -> bool

Emits the ::mnemonic-activate signal. Read more
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fn observe_children(&self) -> ListModel

Returns a GListModel to track the children of @self. Read more
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fn observe_controllers(&self) -> ListModel

Returns a GListModel to track the EventControllers of @self. Read more
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fn pick(&self, x: f64, y: f64, flags: PickFlags) -> Option<Widget>

Finds the descendant of @self closest to the point (@x, @y). Read more
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fn queue_allocate(&self)

Flags the widget for a rerun of the WidgetImpl::size_allocate() function. Read more
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fn queue_draw(&self)

Schedules this widget to be redrawn in the paint phase of the current or the next frame. Read more
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fn queue_resize(&self)

Flags a widget to have its size renegotiated. Read more
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fn realize(&self)

Creates the GDK resources associated with a widget. Read more
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fn remove_controller(&self, controller: &impl IsA<EventController>)

Removes @controller from @self, so that it doesn’t process events anymore. Read more
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fn remove_css_class(&self, css_class: &str)

Removes a style from @self. Read more
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fn remove_mnemonic_label(&self, label: &impl IsA<Widget>)

Removes a widget from the list of mnemonic labels for this widget. Read more
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fn set_can_focus(&self, can_focus: bool)

Specifies whether the input focus can enter the widget or any of its children. Read more
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fn set_can_target(&self, can_target: bool)

Sets whether @self can be the target of pointer events. Read more
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fn set_child_visible(&self, child_visible: bool)

Sets whether @self should be mapped along with its parent. Read more
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fn set_css_classes(&self, classes: &[&str])

Clear all style classes applied to @self and replace them with @classes. Read more
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fn set_cursor(&self, cursor: Option<&Cursor>)

Sets the cursor to be shown when pointer devices point towards @self. Read more
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fn set_cursor_from_name(&self, name: Option<&str>)

Sets a named cursor to be shown when pointer devices point towards @self. Read more
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fn set_direction(&self, dir: TextDirection)

Sets the reading direction on a particular widget. Read more
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fn set_focus_child(&self, child: Option<&impl IsA<Widget>>)

Set @child as the current focus child of @self. Read more
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fn set_focus_on_click(&self, focus_on_click: bool)

Sets whether the widget should grab focus when it is clicked with the mouse. Read more
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fn set_focusable(&self, focusable: bool)

Specifies whether @self can own the input focus. Read more
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fn set_font_map(&self, font_map: Option<&impl IsA<FontMap>>)

Sets the font map to use for Pango rendering. Read more
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fn set_font_options(&self, options: Option<&FontOptions>)

👎Deprecated: Since 4.16
Sets the cairo::FontOptions used for Pango rendering in this widget. Read more
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fn set_halign(&self, align: Align)

Sets the horizontal alignment of @self. Read more
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fn set_has_tooltip(&self, has_tooltip: bool)

Sets the has-tooltip property on @self to @has_tooltip. Read more
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fn set_hexpand(&self, expand: bool)

Sets whether the widget would like any available extra horizontal space. Read more
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fn set_hexpand_set(&self, set: bool)

Sets whether the hexpand flag will be used. Read more
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fn set_layout_manager(&self, layout_manager: Option<impl IsA<LayoutManager>>)

Sets the layout manager delegate instance that provides an implementation for measuring and allocating the children of @self. Read more
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fn set_margin_bottom(&self, margin: i32)

Sets the bottom margin of @self. Read more
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fn set_margin_end(&self, margin: i32)

Sets the end margin of @self. Read more
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fn set_margin_start(&self, margin: i32)

Sets the start margin of @self. Read more
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fn set_margin_top(&self, margin: i32)

Sets the top margin of @self. Read more
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fn set_widget_name(&self, name: &str)

Sets a widgets name. Read more
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fn set_opacity(&self, opacity: f64)

Request the @self to be rendered partially transparent. Read more
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fn set_overflow(&self, overflow: Overflow)

Sets how @self treats content that is drawn outside the widget’s content area. Read more
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fn set_parent(&self, parent: &impl IsA<Widget>)

Sets @parent as the parent widget of @self. Read more
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fn set_receives_default(&self, receives_default: bool)

Specifies whether @self will be treated as the default widget within its toplevel when it has the focus, even if another widget is the default. Read more
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fn set_sensitive(&self, sensitive: bool)

Sets the sensitivity of a widget. Read more
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fn set_size_request(&self, width: i32, height: i32)

Sets the minimum size of a widget. Read more
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fn set_state_flags(&self, flags: StateFlags, clear: bool)

Turns on flag values in the current widget state. Read more
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fn set_tooltip_markup(&self, markup: Option<&str>)

Sets @markup as the contents of the tooltip, which is marked up with Pango markup. Read more
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fn set_tooltip_text(&self, text: Option<&str>)

Sets @text as the contents of the tooltip. Read more
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fn set_valign(&self, align: Align)

Sets the vertical alignment of @self. Read more
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fn set_vexpand(&self, expand: bool)

Sets whether the widget would like any available extra vertical space. Read more
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fn set_vexpand_set(&self, set: bool)

Sets whether the vexpand flag will be used. Read more
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fn set_visible(&self, visible: bool)

Sets the visibility state of @self. Read more
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fn should_layout(&self) -> bool

Returns whether @self should contribute to the measuring and allocation of its parent. Read more
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fn show(&self)

👎Deprecated: Since 4.10
Flags a widget to be displayed. Read more
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fn size_allocate(&self, allocation: &Allocation, baseline: i32)

Allocates widget with a transformation that translates the origin to the position in @allocation. Read more
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fn snapshot_child( &self, child: &impl IsA<Widget>, snapshot: &impl IsA<Snapshot> )

Snapshot the a child of @self. Read more
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fn translate_coordinates( &self, dest_widget: &impl IsA<Widget>, src_x: f64, src_y: f64 ) -> Option<(f64, f64)>

👎Deprecated: Since 4.12
Translate coordinates relative to @self’s allocation to coordinates relative to @dest_widget’s allocations. Read more
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fn trigger_tooltip_query(&self)

Triggers a tooltip query on the display where the toplevel of @self is located.
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fn unmap(&self)

Causes a widget to be unmapped if it’s currently mapped. Read more
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fn unparent(&self)

Dissociate @self from its parent. Read more
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fn unrealize(&self)

Causes a widget to be unrealized (frees all GDK resources associated with the widget). Read more
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fn unset_state_flags(&self, flags: StateFlags)

Turns off flag values for the current widget state. Read more
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fn height_request(&self) -> i32

Override for height request of the widget. Read more
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fn set_height_request(&self, height_request: i32)

Override for height request of the widget. Read more
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fn width_request(&self) -> i32

Override for width request of the widget. Read more
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fn set_width_request(&self, width_request: i32)

Override for width request of the widget. Read more
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fn connect_destroy<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Signals that all holders of a reference to the widget should release the reference that they hold. Read more
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fn connect_direction_changed<F: Fn(&Self, TextDirection) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when the text direction of a widget changes. Read more
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fn connect_hide<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Emitted when @widget is hidden.
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fn connect_keynav_failed<F: Fn(&Self, DirectionType) -> Propagation + 'static>( &self, f: F ) -> SignalHandlerId

Emitted if keyboard navigation fails. Read more
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fn connect_map<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Emitted when @widget is going to be mapped. Read more
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fn connect_mnemonic_activate<F: Fn(&Self, bool) -> Propagation + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when a widget is activated via a mnemonic. Read more
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fn connect_move_focus<F: Fn(&Self, DirectionType) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when the focus is moved. Read more
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fn emit_move_focus(&self, direction: DirectionType)

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fn connect_query_tooltip<F: Fn(&Self, i32, i32, bool, &Tooltip) -> bool + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when the widget’s tooltip is about to be shown. Read more
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fn connect_realize<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Emitted when @widget is associated with a gdk::Surface. Read more
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fn connect_show<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Emitted when @widget is shown.
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fn connect_state_flags_changed<F: Fn(&Self, StateFlags) + 'static>( &self, f: F ) -> SignalHandlerId

Emitted when the widget state changes. Read more
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fn connect_unmap<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Emitted when @widget is going to be unmapped. Read more
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fn connect_unrealize<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId

Emitted when the gdk::Surface associated with @widget is destroyed. Read more
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fn connect_can_focus_notify<F: Fn(&Self) + 'static>( &self, f: F ) -> SignalHandlerId

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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impl<O> WidgetExtManual for O
where O: IsA<Widget>,

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fn add_tick_callback<P: Fn(&Self, &FrameClock) -> ControlFlow + 'static>( &self, callback: P ) -> TickCallbackId

Queues an animation frame update and adds a callback to be called before each frame. Read more
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impl<O> ConstraintTargetExt for O

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impl<'a, T, C, E> FromValueOptional<'a> for T
where T: FromValue<'a, Checker = C>, C: ValueTypeChecker<Error = ValueTypeMismatchOrNoneError<E>>, E: Error + Send + 'static,

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impl<Super, Sub> MayDowncastTo<Sub> for Super
where Super: IsA<Super>, Sub: IsA<Super>,