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/*
* Copyright 2006 Computing Research Labs, New Mexico State University
*
* 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 to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell 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
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COMPUTING RESEARCH LAB OR NEW MEXICO STATE UNIVERSITY BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
* OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef _h_grayswatch
#define _h_grayswatch
#include <gtk/gtkvbox.h>
G_BEGIN_DECLS
/*
* The macros for accessing various parts of the widget class.
*/
#define GRAYSWATCH(obj)(GTK_CHECK_CAST(obj, grayswatch_get_type(), Grayswatch))
#define GRAYSWATCH_CLASS(klass) \
(GTK_CHECK_CLASS_CAST(klass, grayswatch_get_type(), GrayswatchClass))
#define IS_GRAYSWATCH(obj) GTK_CHECK_TYPE(obj, grayswatch_get_type())
#define IS_GRAYSWATCH_CLASS(klass) \
(GTK_CHECK_CLASS_TYPE(klass, grayswatch_get_type()))
#define GRAYSWATCH_GET_CLASS(obj) \
(GTK_CHECK_GET_CLASS(obj, grayswatch_get_type(), GrayswatchClass))
typedef struct _Grayswatch Grayswatch;
typedef struct _GrayswatchClass GrayswatchClass;
struct _Grayswatch {
GtkVBox vbox;
/*
* Public members.
*/
guint gray;
/*
* Private members.
*/
GtkWidget *swatch;
GtkWidget *value;
/*
* The grayscale image used to draw the swatch color.
*/
guchar *image;
guint image_size;
/*
* Flag indicating whether the signal should be blocked or not.
*/
gboolean signal_blocked;
};
struct _GrayswatchClass {
GtkVBoxClass parent_class;
/*
* Signal handlers.
*/
void (*value_changed)(GtkWidget *, gint, gpointer);
};
/**************************************************************************
*
* General API
*
**************************************************************************/
extern GtkType grayswatch_get_type(void);
extern GtkWidget *grayswatch_new(guint gray);
/*
* The gray value is between 0 and 255.
*/
extern void grayswatch_set_gray(Grayswatch *gs, guint gray);
/*
* Anything over 255 returned by this routine means an error.
*/
extern guint grayswatch_get_gray(Grayswatch *gs);
/*
* Block the signal from being emitted while setting the gray level.
* This is for a specific application and may not be useful anywhere else.
* No error checking is done to make sure blocking and unblocking are
* done in pairs.
*/
extern void grayswatch_block_signal(Grayswatch *gs, gboolean block);
G_END_DECLS
#endif /* _h_grayswatch */
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