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gtk2/gtk/gtkgamma.c
Elliot Lee 060978e069 I submitted this patch twice to gtk-devel-list, and received no comments, 
I submitted this patch twice to gtk-devel-list, and received no comments, so
am committing it.  Although not exhaustively tested, I have been using this
gtk+ for a week w/o problems, and I did read the code to ensure that nothing
ever writes to these data structures. If by chance people encounter SEGV's in
gtk+ code that is setting values in global data structures, this patch could
be a possible culprit.

1998-11-30  Elliot Lee  <sopwith@cuc.ml.org>

	* {gdk,gtk}/*.c: Make read-only data structures "static const" to
	allow them to be shared, mainly including (but not limited to) the
	GtkTypeInfo structures for each class.

	* gtk/gtkfilesel.c: Add /net to the "leave me alone" directory listing.
1998-11-30 19:07:15 +00:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 1997 David Mosberger
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library 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.
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include "gtkgamma.h"
#include "gtkcurve.h"
#include "gtkdialog.h"
#include "gtkdrawingarea.h"
#include "gtkentry.h"
#include "gtkhbox.h"
#include "gtklabel.h"
#include "gtkmain.h"
#include "gtkpixmap.h"
#include "gtkradiobutton.h"
#include "gtksignal.h"
#include "gtktable.h"
#include "gtkvbox.h"
#include "gtkwindow.h"
static GtkVBoxClass *parent_class = NULL;
/* forward declarations: */
static void gtk_gamma_curve_class_init (GtkGammaCurveClass *class);
static void gtk_gamma_curve_init (GtkGammaCurve *curve);
static void gtk_gamma_curve_destroy (GtkObject *object);
static void curve_type_changed_callback (GtkWidget *w, gpointer data);
static void button_realize_callback (GtkWidget *w);
static void button_toggled_callback (GtkWidget *w, gpointer data);
static void button_clicked_callback (GtkWidget *w, gpointer data);
enum
{
LINEAR = 0,
SPLINE,
FREE,
GAMMA,
RESET,
NUM_XPMS
};
static const char *xpm[][27] =
{
/* spline: */
{
/* width height ncolors chars_per_pixel */
"16 16 4 1",
/* colors */
". c None",
"B c #000000",
"+ c #BC2D2D",
"r c #FF0000",
/* pixels */
"..............BB",
".........rrrrrrB",
".......rr.......",
".....B+.........",
"....BBB.........",
"....+B..........",
"....r...........",
"...r............",
"...r............",
"..r.............",
"..r.............",
".r..............",
".r..............",
".r..............",
"B+..............",
"BB.............."
},
/* linear: */
{
/* width height ncolors chars_per_pixel */
"16 16 5 1",
/* colors */
". c None", /* transparent */
"B c #000000",
"' c #7F7F7F",
"+ c #824141",
"r c #FF0000",
/* pixels */
"..............BB",
"..............+B",
"..............r.",
".............r..",
".............r..",
"....'B'.....r...",
"....BBB.....r...",
"....+B+....r....",
"....r.r....r....",
"...r...r..r.....",
"...r...r..r.....",
"..r.....rB+.....",
"..r.....BBB.....",
".r......'B'.....",
"B+..............",
"BB.............."
},
/* free: */
{
/* width height ncolors chars_per_pixel */
"16 16 2 1",
/* colors */
". c None",
"r c #FF0000",
/* pixels */
"................",
"................",
"......r.........",
"......r.........",
".......r........",
".......r........",
".......r........",
"........r.......",
"........r.......",
"........r.......",
".....r...r.rrrrr",
"....r....r......",
"...r.....r......",
"..r.......r.....",
".r........r.....",
"r..............."
},
/* gamma: */
{
/* width height ncolors chars_per_pixel */
"16 16 10 1",
/* colors */
". c None",
"B c #000000",
"& c #171717",
"# c #2F2F2F",
"X c #464646",
"= c #5E5E5E",
"/ c #757575",
"+ c #8C8C8C",
"- c #A4A4A4",
"` c #BBBBBB",
/* pixels */
"................",
"................",
"................",
"....B=..+B+.....",
"....X&`./&-.....",
"...../+.XX......",
"......B.B+......",
"......X.X.......",
"......X&+.......",
"......-B........",
"....../=........",
"......#B........",
"......BB........",
"......B#........",
"................",
"................"
},
/* reset: */
{
/* width height ncolors chars_per_pixel */
"16 16 4 1",
/* colors */
". c None",
"B c #000000",
"+ c #824141",
"r c #FF0000",
/* pixels */
"..............BB",
"..............+B",
".............r..",
"............r...",
"...........r....",
"..........r.....",
".........r......",
"........r.......",
".......r........",
"......r.........",
".....r..........",
"....r...........",
"...r............",
"..r.............",
"B+..............",
"BB.............."
}
};
guint
gtk_gamma_curve_get_type (void)
{
static guint gamma_curve_type = 0;
if (!gamma_curve_type)
{
static const GtkTypeInfo gamma_curve_info =
{
"GtkGammaCurve",
sizeof (GtkGammaCurve),
sizeof (GtkGammaCurveClass),
(GtkClassInitFunc) gtk_gamma_curve_class_init,
(GtkObjectInitFunc) gtk_gamma_curve_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
gamma_curve_type =
gtk_type_unique (gtk_vbox_get_type (), &gamma_curve_info);
}
return gamma_curve_type;
}
static void
gtk_gamma_curve_class_init (GtkGammaCurveClass *class)
{
GtkObjectClass *object_class;
parent_class = gtk_type_class (gtk_vbox_get_type ());
object_class = (GtkObjectClass *) class;
object_class->destroy = gtk_gamma_curve_destroy;
}
static void
gtk_gamma_curve_init (GtkGammaCurve *curve)
{
GtkWidget *vbox;
int i;
curve->gamma = 1.0;
curve->table = gtk_table_new (1, 2, FALSE);
gtk_table_set_col_spacings (GTK_TABLE (curve->table), 3);
gtk_container_add (GTK_CONTAINER (curve), curve->table);
curve->curve = gtk_curve_new ();
gtk_signal_connect (GTK_OBJECT (curve->curve), "curve_type_changed",
(GtkSignalFunc) curve_type_changed_callback, curve);
gtk_table_attach_defaults (GTK_TABLE (curve->table), curve->curve, 0, 1, 0, 1);
vbox = gtk_vbox_new (/* homogeneous */ FALSE, /* spacing */ 3);
gtk_table_attach (GTK_TABLE (curve->table), vbox, 1, 2, 0, 1, 0, 0, 0, 0);
/* toggle buttons: */
for (i = 0; i < 3; ++i)
{
curve->button[i] = gtk_toggle_button_new ();
gtk_object_set_data (GTK_OBJECT (curve->button[i]), "_GtkGammaCurveIndex",
GINT_TO_POINTER (i));
gtk_container_add (GTK_CONTAINER (vbox), curve->button[i]);
gtk_signal_connect (GTK_OBJECT (curve->button[i]), "realize",
(GtkSignalFunc) button_realize_callback, 0);
gtk_signal_connect (GTK_OBJECT (curve->button[i]), "toggled",
(GtkSignalFunc) button_toggled_callback, curve);
gtk_widget_show (curve->button[i]);
}
/* push buttons: */
for (i = 3; i < 5; ++i)
{
curve->button[i] = gtk_button_new ();
gtk_object_set_data (GTK_OBJECT (curve->button[i]), "_GtkGammaCurveIndex",
GINT_TO_POINTER (i));
gtk_container_add (GTK_CONTAINER (vbox), curve->button[i]);
gtk_signal_connect (GTK_OBJECT (curve->button[i]), "realize",
(GtkSignalFunc) button_realize_callback, 0);
gtk_signal_connect (GTK_OBJECT (curve->button[i]), "clicked",
(GtkSignalFunc) button_clicked_callback, curve);
gtk_widget_show (curve->button[i]);
}
gtk_widget_show (vbox);
gtk_widget_show (curve->table);
gtk_widget_show (curve->curve);
}
static void
button_realize_callback (GtkWidget *w)
{
GtkWidget *pixmap;
GdkBitmap *mask;
GdkPixmap *pm;
int i;
i = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (w), "_GtkGammaCurveIndex"));
pm = gdk_pixmap_create_from_xpm_d (w->window, &mask,
&w->style->bg[GTK_STATE_NORMAL], xpm[i]);
pixmap = gtk_pixmap_new (pm, mask);
gtk_container_add (GTK_CONTAINER (w), pixmap);
gtk_widget_show (pixmap);
gdk_pixmap_unref (pm);
gdk_bitmap_unref (mask); /* a bitmap is really just a special pixmap */
}
static void
button_toggled_callback (GtkWidget *w, gpointer data)
{
GtkGammaCurve *c = data;
GtkCurveType type;
int active, i;
if (!GTK_TOGGLE_BUTTON (w)->active)
return;
active = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (w), "_GtkGammaCurveIndex"));
for (i = 0; i < 3; ++i)
if ((i != active) && GTK_TOGGLE_BUTTON (c->button[i])->active)
break;
if (i < 3)
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (c->button[i]), FALSE);
switch (active)
{
case 0: type = GTK_CURVE_TYPE_SPLINE; break;
case 1: type = GTK_CURVE_TYPE_LINEAR; break;
default: type = GTK_CURVE_TYPE_FREE; break;
}
gtk_curve_set_curve_type (GTK_CURVE (c->curve), type);
}
static void
gamma_cancel_callback (GtkWidget *w, gpointer data)
{
GtkGammaCurve *c = data;
gtk_widget_destroy (c->gamma_dialog);
c->gamma_dialog = 0;
}
static void
gamma_ok_callback (GtkWidget *w, gpointer data)
{
GtkGammaCurve *c = data;
gchar *start, *end;
gfloat v;
start = gtk_entry_get_text (GTK_ENTRY (c->gamma_text));
if (start)
{
v = strtod (start, &end);
if (end > start && v > 0.0)
c->gamma = v;
}
gtk_curve_set_gamma (GTK_CURVE (c->curve), c->gamma);
gamma_cancel_callback (w, data);
}
static void
button_clicked_callback (GtkWidget *w, gpointer data)
{
GtkGammaCurve *c = data;
int active;
active = GPOINTER_TO_INT (gtk_object_get_data (GTK_OBJECT (w), "_GtkGammaCurveIndex"));
if (active == 3)
{
/* set gamma */
if (c->gamma_dialog)
return;
else
{
GtkWidget *vbox, *hbox, *label, *button;
gchar buf[64];
c->gamma_dialog = gtk_dialog_new ();
gtk_window_set_title (GTK_WINDOW (c->gamma_dialog), "Gamma");
vbox = GTK_DIALOG (c->gamma_dialog)->vbox;
hbox = gtk_hbox_new (/* homogeneous */ FALSE, 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 2);
gtk_widget_show (hbox);
label = gtk_label_new ("Gamma value");
gtk_box_pack_start (GTK_BOX (hbox), label, FALSE, FALSE, 2);
gtk_widget_show (label);
sprintf (buf, "%g", c->gamma);
c->gamma_text = gtk_entry_new ();
gtk_entry_set_text (GTK_ENTRY (c->gamma_text), buf);
gtk_box_pack_start (GTK_BOX (hbox), c->gamma_text, TRUE, TRUE, 2);
gtk_widget_show (c->gamma_text);
/* fill in action area: */
hbox = GTK_DIALOG (c->gamma_dialog)->action_area;
button = gtk_button_new_with_label ("OK");
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gamma_ok_callback, c);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_grab_default (button);
gtk_widget_show (button);
button = gtk_button_new_with_label ("Cancel");
gtk_signal_connect (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gamma_cancel_callback, c);
gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
gtk_widget_show (button);
gtk_widget_show (c->gamma_dialog);
}
}
else
{
/* reset */
gtk_curve_reset (GTK_CURVE (c->curve));
}
}
static void
curve_type_changed_callback (GtkWidget *w, gpointer data)
{
GtkGammaCurve *c = data;
GtkCurveType new_type;
int active;
new_type = GTK_CURVE (w)->curve_type;
switch (new_type)
{
case GTK_CURVE_TYPE_SPLINE: active = 0; break;
case GTK_CURVE_TYPE_LINEAR: active = 1; break;
default: active = 2; break;
}
if (!GTK_TOGGLE_BUTTON (c->button[active])->active)
gtk_toggle_button_set_state (GTK_TOGGLE_BUTTON (c->button[active]), TRUE);
}
GtkWidget*
gtk_gamma_curve_new (void)
{
return gtk_type_new (gtk_gamma_curve_get_type ());
}
static void
gtk_gamma_curve_destroy (GtkObject *object)
{
GtkGammaCurve *c;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_GAMMA_CURVE (object));
c = GTK_GAMMA_CURVE (object);
if (c->gamma_dialog)
gtk_widget_destroy (c->gamma_dialog);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
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