2001-05-20  Chema Celorio  <chema@celorio.com>

	* src/sheet-object.c (sheet_object_init): initialize the so->direction
	to _UNKNOWN
	(sheet_object_direction_set): impl.
	(sheet_object_rubber_band_directly): impl a small convenience function
	to get the value of SO_CLASS(so)->rubber_band_directly

	* src/sheet-object-widget.c (sheet_widget_checkbox_construct_with_range):
	add a label argument to also optionaly specify a label
	(sheet_widget_checkbox_clone): when cloning a checkbox, copy it's value
	too
	add a ->label and rename ->entry to ->expresion in CheckboxConfigState
	(cb_checkbox_label_changed): impl.
	(sheet_widget_checkbox_user_config): add an entry for the label of
	the checkbutton
	(sheet_widget_checkbox_set_sheet): call _set_active when setting the
	sheet of a checkbox

	* src/sheet-object-impl.h: add the SheetObjectDirection enums
	add ->direction to SheetObject
	add ->rubber_band_directly to SheetObjectClass

	* src/sheet-object-graphic.c (sheet_object_graphic_read_xml): read
	the object's direction
	(sheet_object_graphic_write_xml): save the direction of the object
	(sheet_object_graphic_class_init): so->direction = TRUE
	(sheet_object_graphic_init): initlalize so->direction

	* src/sheet-control-gui.c (scg_object_move): calculate the new direction
	of the object when moving a handle.
	(scg_object_view_position): the coordinates of the object depend on
	it's ->direction now.

	* src/item-grid.c (cb_obj_create_motion): if we are rubberbanding directly,
	calculate the sheet object direction and position.
	(cb_obj_create_button_release): only set the sheet if we are not rubber_banding_
	direcly. Objects that are rubber banded directly have already been attached to
	a sheet.
	(sheet_object_begin_creation): if we are rubber_banding_direclty the object,
	attach it to a sheet.

	* src/sheet-object-widget.c (sheet_widget_checkbox_destroy): check if
	the dependent has been linked before unlinking. We might have created
	the object without attaching it to a sheet.