eiffel-iup/library/iup_widget_text_selection.e

deferred class IUP_WIDGET_TEXT_SELECTION
-- Commands to handle the attributes related with selection.

inherit
	IUP_WIDGET_INTERNALS
	
insert
	IUP_INTERFACE

feature {ANY}

	set_selection (col1, col2: INTEGER)
		-- Selection interval in characters. Where col1 and col2 are integer 
		-- numbers corresponding to the selection's interval. col2 correspond to 
		-- the character after the last selected character.
		-- The first position is "1".
		-- In Windows, when changing the selection the caret position is also 
		-- changed.	
		local
			str: STRING
		do
			str := col1.to_string
	      str.append_string(":")
 	      str.append_string(col2.to_string)
	
			iup_open.set_attribute(Current, "SELECTION", str)
		end

	get_selection: TUPLE[INTEGER, INTEGER]
		-- Selection interval in characters. Returns "0, 0" if there is no 
		-- selection.
		local
			str: STRING
			tup: TUPLE[INTEGER, INTEGER]
		do
			str := iup_open.get_attribute(Current, "SELECTION")

			if not str.is_empty then
				Result := components_of(str, ':')
			else
				Result := [0.to_integer_32, 0.to_integer_32]
			end
		end

	set_selection_pos (col1, col2: INTEGER)
		-- (non inheritable): Same as SELECTION but using a zero based character 
		-- index. Useful for indexing the VALUE string. See the Notes above if 
		-- using UTF-8 strings in GTK.
		local
			str: STRING
		do
			create str.copy(col1.to_string)
	      str.append_string(":")
 	      str.append_string(col2.to_string)
	
			iup_open.set_attribute(Current, "SELECTIONPOS", str)
		end

	get_selection_pos: TUPLE[INTEGER, INTEGER]
		-- (non inheritable): Same as SELECTION but using a zero based character 
		-- index. Returns "0, 0" if there is no selection.
		local
			str: STRING
			tup: TUPLE[INTEGER, INTEGER]
		do
			str := iup_open.get_attribute(Current, "SELECTIONPOS")

			if not str.is_empty then
				Result := components_of(str, ':')
			else
				Result := [0.to_integer_32, 0.to_integer_32]
			end
		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
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-- 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 
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--
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