eiffel-iup/library/iup_widget_font.e

deferred class IUP_WIDGET_FONT
-- Commands to handle the attributes related with fonts.

inherit
	IUP_WIDGET_INTERNALS
	
feature {ANY}

	set_font (font: STRING)
		-- Set the font used in the element. A string description 
		-- containing typeface, style and size.
		-- Font face is the font face name,	and can be any name. Although 
		-- only names recognized by the system will be actually used. The 
		-- names	Helvetica, Courier and Times are always accepted in all 
		-- systems.
		-- The supported font style is a combination of: Bold, Italic, 
		-- Underline and Strikeout.
		-- Font size is in points (1/72 inch) or in pixels (using 
		-- negative	values).
		-- Unsupported values are simply ignored.
		-- Examples:
		-- "Times, Bold 18"
		-- "Arial, 24" (no style specified)
		-- "Courier New, Italic Underline -30" (size in pixels)
		do
			iup_open.set_attribute(Current, "FONT", font)
		end

	get_font: STRING
		-- Return the string with the description of the used font.
		do
			Result := iup_open.get_attribute(Current, "FONT")
		end

	reset_font
		-- Reset the font to the default value.
		do
			iup_open.reset_attribute(Current, "FONT")
		end

	set_font_face (fontface: STRING)
		-- Replaces the face name of the current FONT attribute.
		do
			iup_open.set_attribute(Current, "FONTFACE", fontface)
		end

	get_font_face: STRING
		-- Return the face name of the current FONT attribute.
		do
			Result := iup_open.get_attribute(Current, "FONTFACE")
		end

	reset_font_face
		-- Reset the fontface to the default value.
		do
			iup_open.reset_attribute(Current, "FONTFACE")
		end

	set_font_style (fontstyle: STRING)
		-- Replaces the style of the current FONT attribute.
		do
			iup_open.set_attribute(Current, "FONTSTYLE", fontstyle)
		end

	get_font_style: STRING
		-- Return the style of the current FONT attribute.
		do
			Result := iup_open.get_attribute(Current, "FONTSTYLE")
		end

	reset_font_style
		-- Reset the fontstyle to the default value.
		do
			iup_open.reset_attribute(Current, "FONTSTYLE")
		end

	set_font_size (fontsize: INTEGER)
		-- Replaces the size of the current FONT attribute.
		do
			iup_open.set_attribute(Current, "FONTSIZE", fontsize.out)
		end

	get_font_size: INTEGER
			-- Return the style of the current FONT attribute.
		local
			size: STRING
		do
			size := iup_open.get_attribute(Current, "FONTSIZE")
			Result := size.to_integer
		end

	reset_font_size
		-- Reset the fontsize to the default value.
		do
			iup_open.reset_attribute(Current, "FONTSIZE")
		end

	get_char_size: INTEGER
		-- Returns the average character size of the current FONT 
		-- attribute. This is the factor used by the SIZE attribute to 
		-- convert its units to pixels.
		local
			size: STRING
		do
			size := iup_open.get_attribute(Current, "CHARSIZE")
			Result := size.to_integer
		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
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-- SOFTWARE.