Make the GtkComboBox in list mode scroll if the list is too large to fit

Make the GtkComboBox in list mode scroll if the list is too large to fit

Mon Jul 26 00:38:27 2004  Matthias Clasen  <maclas@gmx.de>

	Make the GtkComboBox in list mode scroll if the list is too
	large to fit in the popup.  (#135543)

	* gtk/gtkcombobox.c (gtk_combo_box_set_popup_widget): Add a
	scrolled window to the popup in list mode.
	(gtk_combo_box_list_position): Calculate the height of the
	popup so that it fits on the screen, set the scrollbar policy
	of the scrolled window appropriately.
	(gtk_combo_box_popup): Use the height calculated by
	gtk_combo_box_list_position().
	(gtk_combo_box_remeasure): Don't add unnecessary padding.
	(gtk_combo_box_size_request): But add the focus with here.
	(gtk_combo_box_list_setup): Connect to enter notify on the
	popup window to activate auto scrolling.
	(gtk_combo_box_list_enter_notify): Activate auto scrolling.
	(gtk_combo_box_list_button_pressed): Setup a timeout for
	auto scrolling.
	(gtk_combo_box_list_scroll_timeout): Timeout function for
	auto scrolling.
	(gtk_combo_box_list_auto_scroll): Scroll the list when the
	pointer leaves the window.