void gtk_widget_size_request ( GtkWidget* widget, GtkRequisition* requisition )
This function is typically used when implementing a
subclass. Obtains the preferred size of a widget. The container
uses this information to arrange its child widgets and decide what
size allocations to give them with gtk_widget_size_allocate().
You can also call this function from an application, with some caveats. Most notably, getting a size request requires the widget to be associated with a screen, because font information may be needed. Multihead-aware applications should keep this in mind.
Also remember that the size request is not necessarily the size a widget will actually be allocated.
Deprecated since: 3.0
GtkRequisitionto be filled in.
The argument will be set by the function. The returned data is owned by the instance.