Function

GtkDrawingAreaDrawFunc

Declaration 

void
(* GtkDrawingAreaDrawFunc) (
  GtkDrawingArea* drawing_area,
  cairo_t* cr,
  int width,
  int height,
  gpointer user_data
)

Description [src]

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.

Parameters

drawing_area

Type: GtkDrawingArea

The GtkDrawingArea to redraw.

The data is owned by the caller of the function.
cr

Type: cairo_t

The context to draw to.

The data is owned by the caller of the function.
width

Type: int

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

height

Type: int

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

user_data

Type: gpointer

User data.

The argument can be NULL.
The data is owned by the caller of the function.