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WidgetPaintableRef Structure Reference
WidgetPaintableRef
public struct WidgetPaintableRef : WidgetPaintableProtocol, GWeakCapturingGtkWidgetPaintable is a GdkPaintable that displays the contents
of a widget.
GtkWidgetPaintable 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, GtkWidgetPaintable allows you to monitor widgets for size
changes by emitting the [signalGdk.Paintable::invalidate-size] signal
whenever the size of the widget changes as well as for visual changes by
emitting the [signalGdk.Paintable::invalidate-contents] signal whenever
the widget changes.
You can use a GtkWidgetPaintable everywhere a GdkPaintable is allowed,
including using it on a GtkPicture (or one of its parents) that it was
set on itself via gtk_picture_set_paintable(). The paintable will take care
of recursion when this happens. If you do this however, ensure that the
[propertyGtk.Picture:can-shrink] property is set to true or you might
end up with an infinitely growing widget.
The WidgetPaintableRef type acts as a lightweight Swift reference to an underlying GtkWidgetPaintable instance.
It exposes methods that can operate on this data type through WidgetPaintableProtocol conformance.
Use WidgetPaintableRef only as an unowned reference to an existing GtkWidgetPaintable instance.
-
Untyped pointer to the underlying `GtkWidgetPaintable` instance.For type-safe access, use the generated, typed pointer
widget_paintable_ptrproperty instead.Declaration
Swift
public let ptr: UnsafeMutableRawPointer!
-
Designated initialiser from the underlying
Cdata typeDeclaration
Swift
@inlinable init(_ p: UnsafeMutablePointer<GtkWidgetPaintable>) -
Designated initialiser from a constant pointer to the underlying
Cdata typeDeclaration
Swift
@inlinable init(_ p: UnsafePointer<GtkWidgetPaintable>) -
Conditional initialiser from an optional pointer to the underlying
Cdata typeDeclaration
Swift
@inlinable init!(_ maybePointer: UnsafeMutablePointer<GtkWidgetPaintable>?) -
Conditional initialiser from an optional, non-mutable pointer to the underlying
Cdata typeDeclaration
Swift
@inlinable init!(_ maybePointer: UnsafePointer<GtkWidgetPaintable>?) -
Conditional initialiser from an optional
gpointerDeclaration
Swift
@inlinable init!(gpointer g: gpointer?) -
Conditional initialiser from an optional, non-mutable
gconstpointerDeclaration
Swift
@inlinable init!(gconstpointer g: gconstpointer?) -
Reference intialiser for a related type that implements
WidgetPaintableProtocolDeclaration
Swift
@inlinable init<T>(_ other: T) where T : WidgetPaintableProtocol -
This factory is syntactic sugar for setting weak pointers wrapped in
GWeak<T>Declaration
Swift
@inlinable static func unowned<T>(_ other: T) -> WidgetPaintableRef where T : WidgetPaintableProtocol -
Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to
WidgetPaintableProtocol.Declaration
Swift
@inlinable init<T>(cPointer: UnsafeMutablePointer<T>) -
Unsafe typed initialiser. Do not use unless you know the underlying data type the pointer points to conforms to
WidgetPaintableProtocol.Declaration
Swift
@inlinable init<T>(constPointer: UnsafePointer<T>) -
Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to
WidgetPaintableProtocol.Declaration
Swift
@inlinable init(mutating raw: UnsafeRawPointer) -
Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to
WidgetPaintableProtocol.Declaration
Swift
@inlinable init(raw: UnsafeMutableRawPointer) -
Unsafe untyped initialiser. Do not use unless you know the underlying data type the pointer points to conforms to
WidgetPaintableProtocol.Declaration
Swift
@inlinable init(opaquePointer: OpaquePointer)