1 /* GTK - The GIMP Toolkit
2  * Copyright (C) 2012 Red Hat, Inc.
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2 of the License, or (at your option) any later version.
8  *
9  * This library is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #ifndef __GTK_COLOR_SCALE_H__
19 #define __GTK_COLOR_SCALE_H__
20 
21 #include <gtk/gtkscale.h>
22 
23 G_BEGIN_DECLS
24 
25 #define GTK_TYPE_COLOR_SCALE            (gtk_color_scale_get_type ())
26 #define GTK_COLOR_SCALE(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), GTK_TYPE_COLOR_SCALE, GtkColorScale))
27 #define GTK_COLOR_SCALE_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), GTK_TYPE_COLOR_SCALE, GtkColorScaleClass))
28 #define GTK_IS_COLOR_SCALE(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GTK_TYPE_COLOR_SCALE))
29 #define GTK_IS_COLOR_SCALE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GTK_TYPE_COLOR_SCALE))
30 #define GTK_COLOR_SCALE_GET_CLASS(obj)  (G_TYPE_INSTANCE_GET_CLASS ((obj), GTK_TYPE_COLOR_SCALE, GtkColorScaleClass))
31 
32 
33 typedef struct _GtkColorScale         GtkColorScale;
34 typedef struct _GtkColorScaleClass    GtkColorScaleClass;
35 typedef struct _GtkColorScalePrivate  GtkColorScalePrivate;
36 
37 struct _GtkColorScale
38 {
39   GtkScale parent_instance;
40 
41   GtkColorScalePrivate *priv;
42 };
43 
44 struct _GtkColorScaleClass
45 {
46   GtkScaleClass parent_class;
47 
48   /* Padding for future expansion */
49   void (*_gtk_reserved1) (void);
50   void (*_gtk_reserved2) (void);
51   void (*_gtk_reserved3) (void);
52   void (*_gtk_reserved4) (void);
53 };
54 
55 typedef enum
56 {
57   GTK_COLOR_SCALE_HUE,
58   GTK_COLOR_SCALE_ALPHA
59 } GtkColorScaleType;
60 
61 GType       gtk_color_scale_get_type (void) G_GNUC_CONST;
62 GtkWidget * gtk_color_scale_new      (GtkAdjustment     *adjustment,
63                                       GtkColorScaleType  type);
64 void        gtk_color_scale_set_rgba (GtkColorScale     *scale,
65                                       const GdkRGBA     *color);
66 
67 void        gtk_color_scale_draw_trough (GtkColorScale  *scale,
68                                          cairo_t        *cr,
69                                          int             x,
70                                          int             y,
71                                          int             width,
72                                          int             height);
73 
74 G_END_DECLS
75 
76 #endif /* __GTK_COLOR_SCALE_H__ */
77