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-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for Gtk+/Gnome --
-- --
-- Copyright (C) 2001-2013, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public --
-- License as published by the Free Software Foundation; either --
-- version 2 of the License, or (at your option) any later version. --
-- --
-- This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. --
-- --
-- You should have received a copy of the GNU General Public --
-- License along with this library; if not, write to the --
-- Free Software Foundation, Inc., 59 Temple Place - Suite 330, --
-- Boston, MA 02111-1307, USA. --
-- --
-----------------------------------------------------------------------
with Glib.Object; use Glib.Object;
with Glib.Values; use Glib.Values;
with Unchecked_Conversion;
with System; use System;
-- Can't with because of elaboration order issues
-- with Glib.Properties;
package body Glib.Generic_Properties is
type Byte is range 0 .. 255;
for Byte'Size use 8;
function C_Enum_Value_Size return Natural;
pragma Import (C, C_Enum_Value_Size, "ada_c_enum_value_size");
type C_Enum_Value is array (1 .. C_Enum_Value_Size) of Byte;
pragma Pack (C_Enum_Value);
type Enum_Value_Array is array (Guint range <>) of C_Enum_Value;
type Enum_Value_Array_Access is access all Enum_Value_Array;
procedure C_Create_Enum_Value
(Value : Gint; Name, Nick : System.Address; Enum : out C_Enum_Value);
pragma Import (C, C_Create_Enum_Value, "ada_genum_create_enum_value");
-- The strings Name and Nick are duplicated.
function C_Register_Static
(Name : String; Static_Values : System.Address) return GType;
pragma Import (C, C_Register_Static, "g_enum_register_static");
----------------------------------
-- Generic_Enumeration_Property --
----------------------------------
package body Generic_Enumeration_Property is
function Conv is new Unchecked_Conversion (Enumeration, Gint);
-- Note: this will raise a warning at compilation-time if no
-- representation clause has been defined for Enumeration. As
-- documented, Set_Property will not work anyway, so a warning
-- is even a good thing!
--------------
-- Get_Type --
--------------
function Get_Type return GType is
Arr : Enum_Value_Array_Access;
-- The memory for Arr is voluntarily not freed, since we need
-- to use if at any time in the life of the GtkAda application.
J : Guint := 1;
begin
if The_Type /= GType_Invalid then
return The_Type;
end if;
Arr := new Enum_Value_Array
(1 .. Enumeration'Pos (Enumeration'Last) + 2);
for E in Enumeration'Range loop
declare
S : aliased String := Enumeration'Image (E) & ASCII.NUL;
begin
C_Create_Enum_Value (Conv (E), S'Address, S'Address, Arr (J));
end;
J := J + 1;
end loop;
C_Create_Enum_Value
(0, System.Null_Address, System.Null_Address, Arr (Arr'Last));
The_Type := C_Register_Static (Name & ASCII.NUL, Arr.all'Address);
return The_Type;
end Get_Type;
---------------
-- Gnew_Enum --
---------------
function Gnew_Enum
(Name, Nick, Blurb : String;
Default : Enumeration := Enumeration'First;
Flags : Param_Flags := Param_Readable or Param_Writable)
return Param_Spec
is
function Internal
(Name, Nick, Blurb : String;
Enum_Type : GType;
Default : Enumeration;
Flags : Param_Flags) return Param_Spec;
pragma Import (C, Internal, "g_param_spec_enum");
begin
return Internal
(Name & ASCII.NUL, Nick & ASCII.NUL, Blurb & ASCII.NUL,
Enum_Type => Get_Type,
Default => Default,
Flags => Flags);
end Gnew_Enum;
--------------
-- Set_Enum --
--------------
procedure Set_Enum (Value : in out GValue; Enum : Enumeration) is
procedure Internal (Value : in out GValue; Enum : Enumeration);
pragma Import (C, Internal, "g_value_set_enum");
begin
Init (Value, Get_Type);
Internal (Value, Enum);
end Set_Enum;
end Generic_Enumeration_Property;
----------------------------------------
-- Generic_Internal_Discrete_Property --
----------------------------------------
package body Generic_Internal_Discrete_Property is
------------------
-- Get_Property --
------------------
function Get_Property
(Object : access Glib.Object.GObject_Record'Class;
Name : Property_RO) return Discrete_Type
is
procedure Get
(Object : System.Address;
Name : Property;
Value : out Gulong);
pragma Import (C, Get, "ada_g_object_get_ulong");
pragma Warnings (Off);
function To_Discrete_Type is new
Ada.Unchecked_Conversion (Gulong, Discrete_Type);
pragma Warnings (On);
Ret : Gulong;
begin
Get (Get_Object (Object), Property (Name), Ret);
return To_Discrete_Type (Ret);
end Get_Property;
------------------
-- Get_Property --
------------------
function Get_Property
(Object : access Glib.Object.GObject_Record'Class;
Name : Property) return Discrete_Type is
begin
return Get_Property (Object, Property_RO (Name));
end Get_Property;
------------------
-- Set_Property --
------------------
procedure Set_Property
(Object : access Glib.Object.GObject_Record'Class;
Name : Property;
Value : Discrete_Type)
is
procedure Internal
(Object : System.Address;
Name : Property;
Value : Gulong);
pragma Import (C, Internal, "ada_g_object_set_ulong");
pragma Warnings (Off);
function To_Gulong is new
Ada.Unchecked_Conversion (Discrete_Type, Gulong);
pragma Warnings (On);
begin
Internal (Get_Object (Object), Name, To_Gulong (Value));
end Set_Property;
end Generic_Internal_Discrete_Property;
-------------------------------------
-- Generic_Internal_Boxed_Property --
-------------------------------------
package body Generic_Internal_Boxed_Property is
type Boxed_Access is access all Boxed_Type;
function Conv is new Unchecked_Conversion
(System.Address, Boxed_Access);
---------------
-- Set_Value --
---------------
procedure Set_Value
(Value : out Glib.Values.GValue;
Val : Boxed_Type)
is
V : constant System.Address := To_Address (Val, Val'Address);
begin
-- Do not do an actual copy with gdk_color_copy, or
-- pango_font_description_copy: it is in fact done
-- automatically by gdk, when it defines (in gdkcolor.c) the type as
-- g_boxed_type_register_static
-- ("GdkColor",(GBoxedCopyFunc)gdk_color_copy,
-- (GBoxedFreeFunc)gdk_color_free);
Init (Value, Get_Type);
Set_Boxed (Value, V);
end Set_Value;
---------------
-- Get_Value --
---------------
function Get_Value (Value : Glib.Values.GValue) return Boxed_Type is
Boxed : constant Boxed_Access := Conv (Get_Boxed (Value));
begin
if Boxed = null then
raise Unset_Value;
else
return Boxed.all;
end if;
end Get_Value;
------------------
-- Set_Property --
------------------
procedure Set_Property
(Object : access Glib.Object.GObject_Record'Class;
Name : Property;
Value : Boxed_Type)
is
procedure Internal
(Object : System.Address; Name : String; Value : in out GValue);
pragma Import (C, Internal, "g_object_set_property");
-- Internal function to set the properties (can't use the one from
-- glib.properties because of elaboration order issues
Val : GValue;
begin
Set_Value (Value => Val, Val => Value);
Internal (Get_Object (Object), Property_Name (Name) & ASCII.NUL, Val);
Unset (Val);
end Set_Property;
------------------
-- Get_Property --
------------------
function Get_Property
(Object : access Glib.Object.GObject_Record'Class;
Name : Property) return Boxed_Type is
begin
return Get_Property (Object, Property_RO (Name));
end Get_Property;
------------------
-- Get_Property --
------------------
function Get_Property
(Object : access Glib.Object.GObject_Record'Class;
Name : Property_RO) return Boxed_Type
is
procedure Internal
(Object : System.Address;
Name : Property_RO;
Value : in out GValue);
pragma Import (C, Internal, "g_object_get_property");
Value : GValue;
Result : Boxed_Type;
begin
Init (Value, Get_Type);
Internal (Get_Object (Object), Name, Value);
Result := Get_Value (Value);
Unset (Value);
return Result;
end Get_Property;
end Generic_Internal_Boxed_Property;
end Glib.Generic_Properties;
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