2001-05-30  Jon K Hellan  <hellan@acm.org>

	* src/sheet-control-gui-priv.h: New file. Implementation details
	for SheetControlGUI and methods directly accessible from the GUI
	layer.

	* src/Makefile.am: Add sheet-control-gui-priv.h

	* src/sheet-control-gui.h: Move struct _SheetControlGUI to
	sheet-control-gui-priv.h. Remove declarations of methods which
	have been made virtual.

	* src/sheet-control-gui.c: Include sheet-control-gui-priv.h instead
	of sheet-control-gui.h.
	Casts and temp variables because:
	- virtual scg methods now take a SheetControl parameter.
        - sheet member now lives in SheetControl.
	Make following methods static - externally available only as
	virtual SheetControl method: scg_redraw_all,
	scg_redraw_cell_region, scg_redraw_headers, scg_update_cursor_pos,
	scg_resize, scg_unant, scg_ant, scg_cursor_bound,
	scg_compute_visible_region, scg_make_cell_visible. Initialize
	class object with these as virtual methods together with
	scg_set_zoom_factor, scg_adjust_preferences, scg_scrollbar_config
	and scg_mode_edit.  Rename context_menu_hander (sic!) to
	context_menu_handler.

	*src/sheet-control.c (SC_VIRTUAL_FULL): Fix typo.
	(sc_destroy): Comment out unused variable.
	(sheet_control_init_state): Rename to sc_init_state.
	(sc_sheet): New accessor - returns sheet attribute.
	(sc_invalidate_sheet): New function - sets sheet attribute to
	NULL.
	(resize, set_zoom_factor, redraw_all, redraw_cell_region,
	redraw_headers, ant, unant, adjust_preferences, update_cursor_pos,
	scrollbar_config, mode_edit, compute_visible_region,
	make_cell_visible, cursor_bound): New virtual methods.

	* src/sheet-control.h: Declare new methods in sheet-control.c

	* src/selection.c: Use sc_redraw_cell_region, sc_redraw_headers
	instead of scg methods.

	* src/sheet.c (sheet_unant): Use sc_unant instead o scg_unant.
	(sheet_ant): Use sc_ant instead of scg_ant.
	(sheet_redraw_all): Use sc_redraw_all instead of scg_redraw_all.
	(sheet_redraw_all): Use sc_redraw_headers instead of
	scg_redraw_headers.
	(sheet_new_scg): Use sc_cursor_bound instead of scg_cursor_bound.
	(sheet_detach_scg): Rename to sheet_detach_control. Change
	parameter from SheetControlGUI to SheetControl. Use sc_sheet and
	sc_invalidate_sheet instead of direct attribute access.
	(sheet_set_zoom_factor): Use sc_set_zoom_factor instead of
	scg_set_zoom_factor.
	(sheet_update_only_grid): Use sc_compute_visible_region instead of
	scg_compute_visible_region.
	(sheet_col_row_gutter): Use sc_resize instead of scg_resize.
	(sheet_redraw_cell_region, sheet_redraw_partial_row,
	sheet_redraw_cell): Use sc_redraw_cell_region instead of
	scg_redraw_cell_region.
	(sheet_make_cell_visible): Use sc_make_cell_visible instead of
	scg_make_cell_visible.
	(sheet_cursor_set): Use sc_cursor_bound instead of
	scg_cursor_bound.
	(sheet_update_cursor_pos): Use sc_update_cursor_pos instead of
	scg_update_cursor_pos.
	(sheet_scrollbar_config): Use sc_scrollbar_config instead of
	scg_scrollbar_config.
	(sheet_adjust_preferences): Use sc_adjust_preferences, sc_resize
	and sc_redraw_all instead of scg_adjust_preferences, scg_resize
	and scg_redraw_all.

	* src/sheet.h (SHEET_FOREACH_CONTROL): Take list of SheetControls
	instead of SheetControlGUIs.

	* src/workbook.c (workbook_sheet_detach): Use sc_mode_edit instead
	of scg_mode_edit.

	* src/embeddable-grid.h: Include sheet-control-gui-priv.h instead
	of sheet-control-gui.h.

	* src/sheet-object-graphic.c: Ditto.

	* src/gnumeric-sheet.c: Include sheet-control-gui-priv.h instead
	of sheet-control-gui.h.
	Casts and temp variables because:
	- virtual scg methods now take a SheetControl parameter.
        - sheet now lives in SheetControl.

	* src/item-bar.c: Ditto.

	* src/item-cursor.c: Ditto.

	* src/item-edit.c: Ditto.

	* src/item-grid.c: Ditto.

	* src/sheet-object-cell-comment.c: Ditto.

	* src/sheet-object-cell-container.c: Ditto.

	* src/sheet-object-item.c: Ditto.

	* src/sheet-object-widget.c: Ditto.

	* src/workbook-control-gui.c: Ditto.

	* src/workbook-object-toolbar.c: Ditto, but don't include
	sheet-control-gui-priv.h

	* src/sheet-object.c (sheet_object_realize): Cast control to
	SheetControlGUI.