And updated gtk_combo_box_list_position() which is still waiting
for GtkTreeView to report natural width in order to properly do
non fixed width dropdown menus.
APIS: gtk_cell_view_get_desired_width_of_row &
gtk_cell_view_get_desired_height_for_width_of_row were introduced in
3.0 only for use from GtkComboBox and now the refactored cellview
does this transparently and just requests the right thing through
GtkWidget apis.
First iteration at implementing combo box using a delegate
treemenu, almost everything is working. Still need to finalize
sensitivity issues in GtkTreeMenu (and should go ahead and pass
through GtkComboBox code with a fine comb...).
- "fit-model" decides that the cellview should request space for
the entire treemodel, this ensures the cell view displayed on
a combo box will not spuriously change size when the selected
item changes.
- "draw-sensitive" forces cell area to render cells sensitive
even if they are insensitive in the model.
Added properties "wrap-width", "row-span-column" and "column-span-column"
to allow grid style menus from treemodels. Handling row data changes
appropriately.
Combo boxes expose an "add-tearoffs" feature to add a tearoff item to the root of the combo menu, added this feature to GtkTreeMenu to achieve this (and updated the testcase).
Now the GtkTreeMenu properly updates its hierarchy when the underlying
model data changes (row inserted/deleted or reordered). Also some unneeded
hackery was removed, all size calculations are delegated to the cellviews.
When the "row-changed" signal on the model is trapped, if the row which
changed is the displayed row then the context is flushed and sizes are
recalculated for every area in the same context.
GtkComboBox needs treemenus to allow selection of all leafs including
rows which may have children, this allows the combobox or combobox user
to decide which row that has children can also be selectable as a header
leaf of the submenu. Test case testtreemenu updated to reflect this.
GtkTreeMenu needs to only populate it's submenus when set_root()
is called, we were populating it when the model is set which cause
the tree to be infinitely populated as the root is NULL by default.
Also call gtk_menu_set_reserve_toggle_thingy (FALSE) to not reserve
space for the toggle size.
Added GtkTreeMenu class to automatically render
a GtkTreeModel into a GtkMenu hierarchy (will be
used by GtkComboBox for its dropdown menus). Included
an accompanying testcase tests/testtreemenu
This is needed by GtkTreeMenu to ensure that child menu items
reserve space for the submenu indicator even if they dont have
submenus... in this way we ensure the same size of all cell
areas in the menu items at allocation/request time.
Added construct GtkCellArea and GtkCellAreaContext properties,
the context property allows putting multiple cellviews into the
same size request context.
The show_submenu_indicator flag was explicitly set in various
places from GtkMenu/GtkMenuBar at request times, since the
GtkMenuItem already checks the parent type for GTK_IS_MENU_BAR()
in various places, removed this flag in favor of just checking
the parent type (only in the interest of better readable code).
