1998-07-30  Federico Mena Quintero  <federico@nuclecu.unam.mx>

	* src/gnumeric-sheet.c (gnumeric_sheet_color_alloc): Query the
	colormap with gtkdget_get_colormap(), because the canvas structure
	no longer has a colormap field in it.
	(gnumeric_sheet_set_top_row): Use the canvas layout adjustment to
	scroll.
	(gnumeric_sheet_set_top_col): Use the canvas layout adjustment to
	scroll.
	(gnumeric_sheet_make_cell_visible): Get the values from the canvas
	adjustments.

	* src/sheet.c (new_canvas_bar): Call gnome_canvas_new() correctly.
	(scroll_to): New helper function to scroll a canvas.
	(sheet_set_zoom_factor): Use scroll_to().

	* src/gnumeric-sheet.c (gnumeric_sheet_create): Do not call
	gnome_canvas_construct() at is does not exist anymore.
	(gnumeric_sheet_new): Use outrageously big values for the canvas
	scrolling region, for now.  This needs to be fixed.
	(gnumeric_sheet_make_cell_visible): Use the canvas layout
	adjustment to scroll.