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.

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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.