[ CCode ( instance_pos = 4.9 ) ]
public delegate void DrawingAreaDrawFunc (DrawingArea drawing_area, Context cr, int width, int height)
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.
| 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 |