/src/wrappers/gdk/library/gdk_color.e

  1indexing
  2	description: "The GdkColor structure is used to describe an allocated or unallocated color."
  3	copyright: "(C) 2006 Paolo Redaelli "
  4	license: "LGPL v2 or later"
  5	date: "$Date:$"
  6	revision: "$Revision:$"
  7
  8class GDK_COLOR
  9
 10inherit
 11	C_STRUCT
 12		redefine 
 13			copy
 14		end
 15creation
 16	from_external_pointer, make
 17
 18feature 
 19
 20	struct_size: INTEGER is
 21		external "C inline use <gdk/gdk.h>"
 22		alias "sizeof(GdkColor)"
 23		end
 24
 25	make is
 26		do
 27			allocate
 28		end
 29
 30	dispose is
 31		do
 32			gdk_color_free (handle)			
 33		end
 34	
 35	copy (another: like Current) is
 36		do
 37			from_external_pointer(gdk_color_copy(handle))
 38		end
 39
 40feature -- Getters and setters
 41
 42	is_allocated: BOOLEAN
 43		-- Not implemented, we still need GdkColormaps for this.
 44		-- Shall be set to True after a call to gdk_color_alloc()
 45		-- or gdk_colors_alloc()
 46
 47	pixel: INTEGER is
 48			-- For allocated colors, the value used to draw this color on the
 49			-- screen.
 50		require
 51			is_allocated
 52		do
 53			Result := get_pixel_external (handle)
 54		ensure
 55			Result > 0
 56		end
 57
 58	red: INTEGER is
 59			-- The red component of the color. This is a value between 0 and
 60			-- 65535, with 65535 indicating full intensitiy.
 61		do
 62			Result := get_red_external (handle)
 63		ensure
 64			Result.in_range (0, 65535)
 65		end
 66
 67	green: INTEGER is
 68			-- The green component of the color.
 69		do
 70			Result := get_green_external (handle)
 71		ensure
 72			Result.in_range (0, 65535)
 73		end
 74
 75	blue: INTEGER is
 76			-- The blue component of the color.
 77		do
 78			Result := get_blue_external (handle)
 79		ensure
 80			Result.in_range (0, 65535)
 81		end
 82
 83	set_red (a_red: INTEGER) is
 84		require
 85			a_red.in_range (0, 65535)
 86		do
 87			set_red_external (handle, a_red)
 88		ensure
 89			red = a_red
 90		end
 91
 92	set_green (a_green: INTEGER) is
 93		require
 94			a_green.in_range (0, 65535)
 95		do
 96			set_green_external (handle, a_green)
 97		ensure
 98			green = a_green
 99		end
100
101	set_blue (a_blue: INTEGER) is
102		require
103			a_blue.in_range (0, 65535)
104		do
105			set_blue_external (handle, a_blue)
106		ensure
107			blue = a_blue
108		end
109
110feature {} -- Low level access
111
112	gdk_color_copy (a_color: POINTER): POINTER is
113			-- GdkColor* gdk_color_copy (const GdkColor *color);
114		external "C use <gdk/gdk.h>"
115		end
116
117	gdk_color_free (a_color: POINTER) is
118			-- void gdk_color_free (GdkColor *color);
119		external "C use <gdk/gdk.h>"
120		end
121
122	get_pixel_external (ptr: POINTER): INTEGER is
123			-- Note: Result shall be NATURAL_32 since itr's a guint32
124		external "C struct GdkColor get pixel use <gdk/gdk.h>"
125		end
126
127	get_red_external (ptr: POINTER): INTEGER is
128			-- Note: Result shall be NATURAL_16 since itr's a guint16
129		external "C struct GdkColor get red use <gdk/gdk.h>"
130		end
131
132	set_red_external (ptr: POINTER; a_red: INTEGER) is
133			-- NOTE: a_red shall be a NATURAL_16 since it's a guint16
134		external "C struct GdkColor set red use <gdk/gdk.h>"
135		end
136
137	get_green_external (ptr: POINTER): INTEGER is
138			-- Note: Result shall be NATURAL_16 since itr's a guint16
139		external "C struct GdkColor get green use <gdk/gdk.h>"
140		end
141
142	set_green_external (ptr: POINTER; a_green: INTEGER) is
143			-- NOTE: a_ shall be a NATURAL_16 since it's a guint16
144		external "C struct GdkColor set green use <gdk/gdk.h>"
145		end
146
147	get_blue_external (ptr: POINTER): INTEGER is
148			-- Note: Result shall be NATURAL_16 since itr's a guint16
149		external "C struct GdkColor get blue use <gdk/gdk.h>"
150		end
151
152	set_blue_external (ptr: POINTER; a_blue: INTEGER) is
153			-- NOTE: a_blue shall be a NATURAL_16 since it's a guint16
154		external "C struct GdkColor set blue use <gdk/gdk.h>"
155		end
156
157end