eiffel-iup/library/iup_widget_size.e

deferred class IUP_WIDGET_SIZE
-- Commands to handle the attributes related with size.

inherit
	IUP_WIDGET_INTERNALS
	
feature {ANY}

	set_size (width: INTEGER; height: INTEGER)
	-- Specifies the element User size in units proportional to the size 
	-- of a character. The size units observes the following 
	-- heuristics:
	--
	-- * Width in 1/4's of the average width of a character for the 
	-- current FONT of each control.
	-- * Height in 1/8's of the average height of a character for the 
	-- current FONT of each control.
	--
	-- So, a SIZE="4x8" means 1 character width and 1 character height.
	-- Notice that this is the average character size, the space occupied by 
	-- a specific string is always different than its number of character 
	-- times its average character size, except when using a monospaced 
	-- font like Courier.
	--
	-- You can also set only one of the parameters by setting the other value
	-- to 0. 
		require
			non_negative: width >= 0
							  height >= 0
		local
			size: STRING
		do
			size := width.out
			size.append_string("x")
			size.append_string(height.out)

			iup_open.set_attribute(Current, "SIZE", size)
		end

	get_size: TUPLE[INTEGER, INTEGER]
		-- Returns the Current size, in units proportional to the size of 
		-- a character.
		local
			size: STRING
		do
			size := iup_open.get_attribute(Current, "SIZE")
			Result := components_of_size(size)			
		end

end

-- The MIT License (MIT)

-- Copyright (c) 2016, 2019 by German A. Arias

-- Permission is hereby granted, free of charge, to any person obtaining a copy
-- of this software and associated documentation files (the "Software"), to deal
-- in the Software without restriction, including without limitation the rights
-- to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-- copies of the Software, and to permit persons to whom the Software is
-- furnished to do so, subject to the following conditions:
--
-- The above copyright notice and this permission notice shall be included in 
-- all copies or substantial portions of the Software.
--
-- THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-- IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-- FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-- AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-- LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-- OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-- SOFTWARE.