觀察筆記

GtkContainer: "gtk_container_get_focus_vadjustment ()

GtkAdjustment* gtk_container_get_focus_vadjustment (GtkContainer *container);

Retrieves the vertical focus adjustment for the container. See gtk_container_set_focus_vadjustment().

container : a GtkContainer
Returns : the vertical focus adjustment, or NULL if none has been set.
gtk_container_set_focus_vadjustment ()

void gtk_container_set_focus_vadjustment (GtkContainer *container,
GtkAdjustment *adjustment);

Hooks up an adjustment to focus handling in a container, so when a child of the container is focused, the adjustment is scrolled to show that widget. This function sets the vertical alignment. See gtk_scrolled_window_get_vadjustment() for a typical way of obtaining the adjustment and gtk_container_set_focus_hadjustment() for setting the horizontal adjustment.

The adjustments have to be in pixel units and in the same coordinate system as the allocation for immediate children of the container.

container : a GtkContainer
adjustment : an adjustment which should be adjusted when the focus is moved among the descendents of container"