Struct gtk4::WidgetPaintable[][src]

pub struct WidgetPaintable(_);
Expand description

WidgetPaintable is a gdk::Paintable that displays the contents of a widget.

WidgetPaintable will also take care of the widget not being in a state where it can be drawn (like when it isn’t shown) and just draw nothing or where it does not have a size (like when it is hidden) and report no size in that case.

Of course, WidgetPaintable allows you to monitor widgets for size changes by emitting the signal::gdk::Paintable::invalidate-size signal whenever the size of the widget changes as well as for visual changes by emitting the signal::gdk::Paintable::invalidate-contents signal whenever the widget changes.

You can use a WidgetPaintable everywhere a gdk::Paintable is allowed, including using it on a Picture (or one of its parents) that it was set on itself via Picture::set_paintable(). The paintable will take care of recursion when this happens. If you do this however, ensure that the property::Picture::can-shrink property is set to true or you might end up with an infinitely growing widget.

Implements

glib::ObjectExt, gdk::prelude::PaintableExt

Implementations

Creates a new widget paintable observing the given widget.

widget

a Widget or None

Returns

a new WidgetPaintable

Returns the widget that is observed or None if none.

Returns

the observed widget.

Sets the widget that should be observed.

widget

the widget to observe or None

Trait Implementations

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

This method returns an Ordering between self and other. Read more

Compares and returns the maximum of two values. Read more

Compares and returns the minimum of two values. Read more

Restrict a value to a certain interval. Read more

This method tests for self and other values to be equal, and is used by ==. Read more

This method tests for !=.

This method returns an ordering between self and other values if one exists. Read more

This method tests less than (for self and other) and is used by the < operator. Read more

This method tests less than or equal to (for self and other) and is used by the <= operator. Read more

This method tests greater than (for self and other) and is used by the > operator. Read more

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

Returns the type identifier of Self.

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Upcasts an object to a superclass or interface T. Read more

Upcasts an object to a reference of its superclass or interface T. Read more

Tries to downcast to a subclass or interface implementor T. Read more

Tries to downcast to a reference of its subclass or interface implementor T. Read more

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 downcast and upcast will do many checks at compile-time already. Read more

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

Casts to T unconditionally. Read more

Casts to &T unconditionally. Read more

Performs the conversion.

Performs the conversion.

Returns true if the object is an instance of (can be cast to) T.

Safety Read more

Safety Read more

Safety Read more

Safety Read more

Safety Read more

Safety Read more

Same as connect but takes a SignalId instead of a signal name.

Same as connect_local but takes a SignalId instead of a signal name.

Same as connect_unsafe but takes a SignalId instead of a signal name.

Emit signal by signal id.

Same as emit but takes Value for the arguments.

Emit signal by its name.

Same as emit_by_name but takes Value for the arguments.

Emit signal with details by signal id.

Same as emit_with_details but takes Value for the arguments.

Compute a concrete size for the Paintable. Read more

Gets an immutable paintable for the current contents displayed by self. Read more

Get flags for the paintable. Read more

Gets the preferred aspect ratio the self would like to be displayed at. Read more

Gets the preferred height the self would like to be displayed at. Read more

Gets the preferred width the self would like to be displayed at. Read more

Called by implementations of Paintable to invalidate their contents. Read more

Called by implementations of Paintable to invalidate their size. Read more

Snapshots the given paintable with the given width and height. Read more

Emitted when the contents of the paintable change. Read more

Emitted when the intrinsic size of the paintable changes. Read more

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

Uses borrowed data to replace owned data, usually by cloning. Read more

Returns a SendValue clone of self.

Converts the given value to a String. Read more

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.