Package ch.bailu.gtk.gtk

Schnittstelle DrawingArea.OnDrawingAreaDrawFunc

Umschließende Klasse:

DrawingArea

Funktionsschnittstelle:

Dies ist eine funktionale Schnittstelle, die somit als Zuweisungsziel für einen Lambdaausdruck oder eine Methodenreferenz verwendet werden kann.

@FunctionalInterface
public static interface DrawingArea.OnDrawingAreaDrawFunc

Methodenübersicht

Modifizierer und Typ	Methode	Beschreibung
void	onDrawingAreaDrawFunc(CallbackHandler __self, DrawingArea drawing_area, Context cr, int width, int height, Pointer user_data)	Whenever @drawing_area needs to redraw, this function will be called.

Methodendetails

onDrawingAreaDrawFunc

void onDrawingAreaDrawFunc(CallbackHandler __self,
 @Nonnull
 DrawingArea drawing_area,
 @Nonnull
 Context cr,
 int width,
 int height,
 @Nullable
 Pointer user_data)

Whenever @drawing_area needs to redraw, this function will be called.

This function should exclusively redraw the contents of the drawing area
and must not call any widget functions that cause changes.

Parameter:

drawing_area - the `GtkDrawingArea` to redraw

cr - the context to draw to

width - the actual width of the contents. This value will be at least as wide as GtkDrawingArea:width.

height - the actual height of the contents. This value will be at least as wide as GtkDrawingArea:height.

user_data - user data