This function is only for use in widget implementations. Obtains
widget->requisition, unless someone has forced a particular
geometry on the widget (e.g. with gtk_widget_set_size_request()),
in which case it returns that geometry instead of the widget's
requisition.
This function differs from gtk_widget_size_request() in that
it retrieves the last size request value from widget->requisition,
while gtk_widget_size_request() actually calls the "size_request" method
on widget to compute the size request and fill in widget->requisition,
and only then returns widget->requisition.
Because this function does not call the "size_request" method, it
can only be used when you know that widget->requisition is
up-to-date, that is, gtk_widget_size_request() has been called
since the last time a resize was queued. In general, only container
implementations have this information; applications should use
gtk_widget_size_request().
This function is only for use in widget implementations. Obtains widget->requisition, unless someone has forced a particular geometry on the widget (e.g. with gtk_widget_set_size_request()), in which case it returns that geometry instead of the widget's requisition. This function differs from gtk_widget_size_request() in that it retrieves the last size request value from widget->requisition, while gtk_widget_size_request() actually calls the "size_request" method on widget to compute the size request and fill in widget->requisition, and only then returns widget->requisition. Because this function does not call the "size_request" method, it can only be used when you know that widget->requisition is up-to-date, that is, gtk_widget_size_request() has been called since the last time a resize was queued. In general, only container implementations have this information; applications should use gtk_widget_size_request().