-----------------------------------------------------------------------
-- GtkAda - Ada95 binding for Gtk+/Gnome --
-- --
-- Copyright (C) 1998-2000 E. Briot, J. Brobecker and A. Charlet --
-- Copyright (C) 2000-2011, 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. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
-----------------------------------------------------------------------
--
-- The Gtk_Curve widget allows the user to edit a curve covering a range of
-- values. It is typically used to fine-tune color balances in graphics
-- applications like the Gimp.
--
-- The Gtk_Curve widget has 3 modes of operation: spline, linear and free. In
-- spline mode the user places points on the curve which are automatically
-- connected together into a smooth curve. In linear mode the user places
-- points on the curve which are connected by straight lines. In free mode the
-- user can draw the points of the curve freely, and they are not connected at
-- all.
--
--
-- Drawing
pragma Warnings (Off, "*is already use-visible*");
with Glib; use Glib;
with Glib.Properties; use Glib.Properties;
with Glib.Types; use Glib.Types;
with Gtk.Buildable; use Gtk.Buildable;
with Gtk.Drawing_Area; use Gtk.Drawing_Area;
with Gtk.Enums; use Gtk.Enums;
with Gtk.Widget; use Gtk.Widget;
package Gtk.Curve is
type Gtk_Curve_Record is new Gtk_Drawing_Area_Record with null record;
type Gtk_Curve is access all Gtk_Curve_Record'Class;
------------------
-- Constructors --
------------------
procedure Gtk_New (Curve : out Gtk_Curve);
procedure Initialize (Curve : access Gtk_Curve_Record'Class);
function Get_Type return Glib.GType;
pragma Import (C, Get_Type, "gtk_curve_get_type");
-------------
-- Methods --
-------------
procedure Reset (Curve : access Gtk_Curve_Record);
-- Reset the curve. Reset to a straight line from the minimum x & y values
-- to the maximum x & y values (i.e. from the bottom-left to the top-right
-- corners). The curve type is not changed.
procedure Set_Curve_Type
(Curve : access Gtk_Curve_Record;
The_Type : Gtk.Enums.Gtk_Curve_Type);
-- Set the type of the curve. The curve will remain unchanged except when
-- changing from a free curve to a linear or spline curve, in which case
-- the curve will be changed as little as possible.
procedure Set_Gamma (Curve : access Gtk_Curve_Record; Gamma : Gfloat);
-- Recompute the entire curve using the given gamma value. A gamma value
-- of 1.0 results in a straight line. Values greater than 1.0 result in a
-- curve above the straight line. Values less than 1.0 result in a curve
-- below the straight line. The curve type is changed to Curve_Type_Free.
procedure Set_Range
(Curve : access Gtk_Curve_Record;
Min_X : Gfloat;
Max_X : Gfloat;
Min_Y : Gfloat;
Max_Y : Gfloat);
-- Set the minimum and maximum x & y values of the curve. The curve is
-- also reset with a call to Reset.
----------------------
-- GtkAda additions --
----------------------
procedure Set_Vector
(Curve : access Gtk_Curve_Record;
Vector : Gfloat_Array);
procedure Get_Vector
(Curve : access Gtk_Curve_Record;
Vector : out Gfloat_Array);
-- Set the vector of points on the curve.
-- The curve type is set to Curve_Type_Free.
----------------
-- Interfaces --
----------------
-- This class implements several interfaces. See Glib.Types
--
-- - "Buildable"
package Implements_Buildable is new Glib.Types.Implements
(Gtk.Buildable.Gtk_Buildable, Gtk_Curve_Record, Gtk_Curve);
function "+"
(Widget : access Gtk_Curve_Record'Class)
return Gtk.Buildable.Gtk_Buildable
renames Implements_Buildable.To_Interface;
function "-"
(Interf : Gtk.Buildable.Gtk_Buildable)
return Gtk_Curve
renames Implements_Buildable.To_Object;
----------------
-- Properties --
----------------
-- The following properties are defined for this widget. See
-- Glib.Properties for more information on properties)
--
-- Name: Curve_Type_Property
-- Type: Gtk.Enums.Gtk_Curve_Type
-- Flags: read-write
--
-- Name: Max_X_Property
-- Type: Gfloat
-- Flags: read-write
--
-- Name: Max_Y_Property
-- Type: Gfloat
-- Flags: read-write
--
-- Name: Min_X_Property
-- Type: Gfloat
-- Flags: read-write
--
-- Name: Min_Y_Property
-- Type: Gfloat
-- Flags: read-write
Curve_Type_Property : constant Gtk.Enums.Property_Gtk_Curve_Type;
Max_X_Property : constant Glib.Properties.Property_Float;
Max_Y_Property : constant Glib.Properties.Property_Float;
Min_X_Property : constant Glib.Properties.Property_Float;
Min_Y_Property : constant Glib.Properties.Property_Float;
-------------
-- Signals --
-------------
-- The following new signals are defined for this widget:
--
-- "curve-type-changed"
-- procedure Handler (Self : access Gtk_Curve_Record'Class);
Signal_Curve_Type_Changed : constant Glib.Signal_Name := "curve-type-changed";
private
Curve_Type_Property : constant Gtk.Enums.Property_Gtk_Curve_Type :=
Gtk.Enums.Build ("curve-type");
Max_X_Property : constant Glib.Properties.Property_Float :=
Glib.Properties.Build ("max-x");
Max_Y_Property : constant Glib.Properties.Property_Float :=
Glib.Properties.Build ("max-y");
Min_X_Property : constant Glib.Properties.Property_Float :=
Glib.Properties.Build ("min-x");
Min_Y_Property : constant Glib.Properties.Property_Float :=
Glib.Properties.Build ("min-y");
end Gtk.Curve;