indexing

	description:
		"Abstract notion of a tool button.";
	date: "$Date$";
	revision: "$Revision$"

class FORMAT_BUTTON

inherit
	EB_BUTTON
		rename
			associated_command as associated_format
		redefine
			make, associated_format
		end;
	WINDOWS;
	HOLE
		redefine
			receive, registered, compatible
		end;

create
	make

feature {NONE} -- Initialization

	make (a_format: FORMATTER; a_parent: COMPOSITE) is
		do
			associated_format := a_format;
			button_make (button_name, a_parent);
			init_button (implementation);
			set_symbol (a_format.symbol);
			add_activate_action (a_format, a_format.tool);
			set_focus_string (associated_format.name)
			initialize_focus 
		end;

feature -- Access

	registered: BOOLEAN is
			-- Always registered
		do
			Result := True
		end;

	compatible (a_stone: STONE): BOOLEAN is
			-- Is the hole compatible with `a_stone'
		local
			tool: TOOL_W;
		do
			tool := associated_format.tool;
			Result := (tool.stone_type = a_stone.stone_type)
		end;

	stone_type: INTEGER is
		do
		end;

	target: WIDGET is
			-- Target of the hole is Current
		do
			Result := Current
		end

feature -- Status Setting

	set_selected (b: BOOLEAN) is
			-- Darken the symbol of current button if `b', lighten it otherwise.
		do
			if b /= is_pressed then
				set_pressed (b)
			end
		end;

feature -- Update

	receive (a_stone: STONE) is
			-- Process dropped stone `a_stone'.
		local
			tool: TOOL_W;
			bar_and_text: BAR_AND_TEXT
		do
			if compatible (a_stone) then
				tool := associated_format.tool;
				if tool.text_window.changed then
					bar_and_text ?= tool;
					bar_and_text.showtext_frmt_holder.execute (tool.stone)
				else
					tool.set_stone (Void);
					tool.set_last_format (associated_format.holder);
						-- Propagate receiption to `associated_format'.
					tool.receive (a_stone)
				end
			end
		end;

feature {NONE} -- Properties

	associated_format: FORMATTER
			-- Associated format

end -- class FORMAT_BUTTON