[ CCode ( cname = "gtk_render_expander" ) ]
public void render_expander (Context cr, double x, double y, double width, double height)
Renders an expander (as used in `GtkTreeView` and `GtkExpander`) in the area defined by x, y, width
, height.
The state gtk_state_flag_checked determines whether the expander is collapsed or expanded.
Typical expander rendering:
| cr |
a `cairo_t` |
| x |
X origin of the rectangle |
| y |
Y origin of the rectangle |
| width |
rectangle width |
| height |
rectangle height |
| context |
a `GtkStyleContext` |