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gimp/plug-ins/diffraction/diffraction.c

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/* The GIMP -- an image manipulation program
* Copyright (C) 1995 Spencer Kimball and Peter Mattis
*
* Diffraction plug-in --- Generate diffraction patterns
* Copyright (C) 1997 Federico Mena Quintero and David Bleecker
* federico@nuclecu.unam.mx
* bleecker@math.hawaii.edu
*
* This program 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 program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include <math.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include <sys/types.h>
#include "gtk/gtk.h"
#include "libgimp/gimp.h"
/***** Magic numbers *****/
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif /* M_PI */
#define ITERATIONS 100 /* 100 */
#define WEIRD_FACTOR 0.04 /* 0.04 */
#define PREVIEW_WIDTH 64
#define PREVIEW_HEIGHT 64
#define PROGRESS_WIDTH 32
#define PROGRESS_HEIGHT 16
#define SCALE_WIDTH 150
/***** Types *****/
typedef struct {
gdouble lam_r;
gdouble lam_g;
gdouble lam_b;
gdouble contour_r;
gdouble contour_g;
gdouble contour_b;
gdouble edges_r;
gdouble edges_g;
gdouble edges_b;
gdouble brightness;
gdouble scattering;
gdouble polarization;
} diffraction_vals_t;
typedef struct {
GtkWidget *preview;
GtkWidget *progress;
guchar preview_row[PREVIEW_WIDTH * 3];
gint run;
} diffraction_interface_t;
/***** Prototypes *****/
static void query(void);
static void run(char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals);
static void diffraction(GDrawable *drawable);
static void diff_init_luts(void);
static void diff_diffract(double x, double y, double *r, double *g, double *b);
static double diff_point(double x, double y, double edges, double contours, double lam);
static double diff_intensity(double x, double y, double lam);
static gint diffraction_dialog(void);
static void dialog_update_preview(void);
static void dialog_create_value(char *title, GtkTable *table, int row, gdouble *value, double left, double right);
static void dialog_update_callback(GtkWidget *widget, gpointer data);
static void dialog_scale_update(GtkAdjustment *adjustment, gdouble *value);
static void dialog_close_callback(GtkWidget *widget, gpointer data);
static void dialog_ok_callback(GtkWidget *widget, gpointer data);
static void dialog_cancel_callback(GtkWidget *widget, gpointer data);
/***** Variables *****/
GPlugInInfo PLUG_IN_INFO = {
NULL, /* init_proc */
NULL, /* quit_proc */
query, /* query_proc */
run /* run_proc */
}; /* PLUG_IN_INFO */
static diffraction_vals_t dvals = {
0.815, /* lam_r */
1.221, /* lam_g */
1.123, /* lam_b */
0.821, /* contour_r */
0.821, /* contour_g */
0.974, /* contour_b */
0.610, /* edges_r */
0.677, /* edges_g */
0.636, /* edges_b */
0.066, /* brightness */
37.126, /* scattering */
-0.473 /* polarization */
}; /* dvals */
static diffraction_interface_t dint = {
NULL, /* preview */
NULL, /* progress */
{ 0 }, /* preview_row */
FALSE /* run */
}; /* dint */
static double cos_lut[ITERATIONS + 1];
static double param_lut1[ITERATIONS + 1];
static double param_lut2[ITERATIONS + 1];
/***** Functions *****/
/*****/
MAIN()
/*****/
static void
query(void)
{
static GParamDef args[] = {
{ PARAM_INT32, "run_mode", "Interactive, non-interactive" },
{ PARAM_IMAGE, "image", "Input image" },
{ PARAM_DRAWABLE, "drawable", "Input drawable" },
{ PARAM_FLOAT, "lam_r", "Light frequency (red)" },
{ PARAM_FLOAT, "lam_g", "Light frequency (green)" },
{ PARAM_FLOAT, "lam_b", "Light frequency (blue)" },
{ PARAM_FLOAT, "contour_r", "Number of contours (red)" },
{ PARAM_FLOAT, "contour_g", "Number of contours (green)" },
{ PARAM_FLOAT, "contour_b", "Number of contours (blue)" },
{ PARAM_FLOAT, "edges_r", "Number of sharp edges (red)" },
{ PARAM_FLOAT, "edges_g", "Number of sharp edges (green)" },
{ PARAM_FLOAT, "edges_b", "Number of sharp edges (blue)" },
{ PARAM_FLOAT, "brightness", "Brightness and shifting/fattening of contours" },
{ PARAM_FLOAT, "scattering", "Scattering (Speed vs. quality)" },
{ PARAM_FLOAT, "polarization", "Polarization" }
}; /* args */
static GParamDef *return_vals = NULL;
static int nargs = sizeof(args) / sizeof(args[0]);
static int nreturn_vals = 0;
gimp_install_procedure("plug_in_diffraction",
"Generate diffraction patterns",
"Help? What help? Real men do not need help :-)", /* FIXME */
"Federico Mena Quintero",
"Federico Mena Quintero & David Bleecker",
"April 1997, 0.5",
"<Image>/Filters/Render/Diffraction Patterns",
"RGB*",
PROC_PLUG_IN,
nargs,
nreturn_vals,
args,
return_vals);
} /* query */
/*****/
static void
run(char *name,
int nparams,
GParam *param,
int *nreturn_vals,
GParam **return_vals)
{
static GParam values[1];
GDrawable *active_drawable;
GRunModeType run_mode;
GStatusType status;
/* Initialize */
diff_init_luts();
status = STATUS_SUCCESS;
run_mode = param[0].data.d_int32;
values[0].type = PARAM_STATUS;
values[0].data.d_status = status;
*nreturn_vals = 1;
*return_vals = values;
switch (run_mode) {
case RUN_INTERACTIVE:
/* Possibly retrieve data */
gimp_get_data("plug_in_diffraction", &dvals);
/* Get information from the dialog */
if (!diffraction_dialog())
return;
break;
case RUN_NONINTERACTIVE:
/* Make sure all the arguments are present */
if (nparams != 15)
status = STATUS_CALLING_ERROR;
if (status == STATUS_SUCCESS) {
dvals.lam_r = param[3].data.d_float;
dvals.lam_g = param[4].data.d_float;
dvals.lam_b = param[5].data.d_float;
dvals.contour_r = param[6].data.d_float;
dvals.contour_g = param[7].data.d_float;
dvals.contour_b = param[8].data.d_float;
dvals.edges_r = param[9].data.d_float;
dvals.edges_g = param[10].data.d_float;
dvals.edges_b = param[11].data.d_float;
dvals.brightness = param[12].data.d_float;
dvals.scattering = param[13].data.d_float;
dvals.polarization = param[14].data.d_float;
} /* if */
break;
case RUN_WITH_LAST_VALS:
/* Possibly retrieve data */
gimp_get_data("plug_in_diffraction", &dvals);
break;
default:
break;
} /* switch */
/* Get the active drawable */
active_drawable = gimp_drawable_get(param[2].data.d_drawable);
/* Create the diffraction pattern */
if ((status == STATUS_SUCCESS) && gimp_drawable_color(active_drawable->id)) {
/* Set the tile cache size */
gimp_tile_cache_ntiles((active_drawable->width + gimp_tile_width() - 1) / gimp_tile_width());
/* Run! */
diffraction(active_drawable);
/* If run mode is interactive, flush displays */
if (run_mode != RUN_NONINTERACTIVE)
gimp_displays_flush();
/* Store data */
if (run_mode == RUN_INTERACTIVE)
gimp_set_data("plug_in_diffraction", &dvals, sizeof(diffraction_vals_t));
} else if (status == STATUS_SUCCESS)
status = STATUS_EXECUTION_ERROR;
values[0].data.d_status = status;
gimp_drawable_detach(active_drawable);
} /* run */
/*****/
static void
diffraction(GDrawable *drawable)
{
GPixelRgn dest_rgn;
gpointer pr;
gint x1, y1, x2, y2;
gint width, height;
gint has_alpha;
gint row, col;
guchar *dest_row;
guchar *dest;
gint progress, max_progress;
double left, right, bottom, top;
double dhoriz, dvert;
double px, py;
double r, g, b;
/* Get the mask bounds and image size */
gimp_drawable_mask_bounds(drawable->id, &x1, &y1, &x2, &y2);
width = x2 - x1;
height = y2 - y1;
has_alpha = gimp_drawable_has_alpha(drawable->id);
/* Initialize pixel regions */
gimp_pixel_rgn_init(&dest_rgn, drawable, x1, y1, width, height, TRUE, TRUE);
progress = 0;
max_progress = width * height;
gimp_progress_init("Creating diffraction pattern...");
/* Create diffraction pattern */
left = -5.0;
right = 5.0;
bottom = -5.0;
top = 5.0;
dhoriz = (right - left) / (width - 1);
dvert = (bottom - top) / (height - 1);
for (pr = gimp_pixel_rgns_register(1, &dest_rgn);
pr != NULL; pr = gimp_pixel_rgns_process(pr)) {
dest_row = dest_rgn.data;
py = top + dvert * (dest_rgn.y - y1);
for (row = 0; row < dest_rgn.h; row++) {
dest = dest_row;
px = left + dhoriz * (dest_rgn.x - x1);
for (col = 0; col < dest_rgn.w; col++) {
diff_diffract(px, py, &r, &g, &b);
*dest++ = 255.0 * r;
*dest++ = 255.0 * g;
*dest++ = 255.0 * b;
if (has_alpha)
*dest++ = 255;
px += dhoriz;
} /* for */
/* Update progress */
progress += dest_rgn.w;
gimp_progress_update((double) progress / max_progress);
py += dvert;
dest_row += dest_rgn.rowstride;
} /* for */
} /* for */
gimp_drawable_flush(drawable);
gimp_drawable_merge_shadow(drawable->id, TRUE);
gimp_drawable_update(drawable->id, x1, y1, width, height);
} /* diffraction */
static void
diff_init_luts(void)
{
int i;
double a;
double sina;
a = -M_PI;
for (i = 0; i <= ITERATIONS; i++) {
sina = sin(a);
cos_lut[i] = cos(a);
param_lut1[i] = 0.75 * sina;
param_lut2[i] = 0.5 * (4.0 * cos_lut[i] * cos_lut[i] + sina * sina);
a += (2.0 * M_PI / ITERATIONS);
} /* for */
} /* diff_init_luts */
/*****/
static void
diff_diffract(double x, double y, double *r, double *g, double *b)
{
*r = diff_point(x, y, dvals.edges_r, dvals.contour_r, dvals.lam_r);
*g = diff_point(x, y, dvals.edges_g, dvals.contour_g, dvals.lam_g);
*b = diff_point(x, y, dvals.edges_b, dvals.contour_b, dvals.lam_b);
} /* diff_diffract */
/*****/
static double
diff_point(double x, double y, double edges, double contours, double lam)
{
return fabs(edges * sin(contours * atan(dvals.brightness * diff_intensity(x, y, lam))));
} /* diff_point */
/*****/
static double
diff_intensity(double x, double y, double lam)
{
int i;
double cxy, sxy;
double param;
double polpi2;
double cospolpi2, sinpolpi2;
cxy = 0.0;
sxy = 0.0;
lam *= 4.0;
for (i = 0; i <= ITERATIONS; i++) {
param = lam *
(cos_lut[i] * x +
param_lut1[i] * y -
param_lut2[i]);
cxy += cos(param);
sxy += sin(param);
} /* for */
cxy *= WEIRD_FACTOR;
sxy *= WEIRD_FACTOR;
polpi2 = dvals.polarization * (M_PI / 2.0);
cospolpi2 = cos(polpi2);
sinpolpi2 = sin(polpi2);
return dvals.scattering * ((cospolpi2 + sinpolpi2) * cxy * cxy +
(cospolpi2 - sinpolpi2) * sxy * sxy);
} /* diff_intensity */
#if 0
/*****/
static double
diff_intensity(double x, double y, double lam)
{
int i;
double cxy, sxy;
double s;
double cosa, sina;
double twocosa, param;
double polpi2;
double cospolpi2, sinpolpi2;
s = dvals.scattering;
cxy = 0.0;
sxy = 0.0;
for (i = 0; i <= ITERATIONS; i++) {
cosa = cos_lut[i];
sina = sin_lut[i];
twocosa = 2.0 * cosa;
param = 4.0 * lam *
(cosa * x +
0.75 * sina * y -
0.5 * (twocosa * twocosa + sina * sina));
cxy += 0.04 * cos(param);
sxy += 0.04 * sin(param);
} /* for */
polpi2 = dvals.polarization * (M_PI / 2.0);
cospolpi2 = cos(polpi2);
sinpolpi2 = sin(polpi2);
return s * ((cospolpi2 + sinpolpi2) * cxy * cxy +
(cospolpi2 - sinpolpi2) * sxy * sxy);
} /* diff_intensity */
#endif
/*****/
static gint
diffraction_dialog(void)
{
GtkWidget *dialog;
GtkWidget *top_table;
GtkWidget *notebook;
GtkWidget *frame;
GtkWidget *vbox;
GtkWidget *table;
GtkWidget *label;
GtkWidget *button;
gint argc;
gchar **argv;
guchar *color_cube;
#if 0
printf("Waiting... (pid %d)\n", getpid());
kill(getpid(), SIGSTOP);
#endif
argc = 1;
argv = g_new(gchar *, 1);
argv[0] = g_strdup("diffraction");
gtk_init(&argc, &argv);
gtk_rc_parse (gimp_gtkrc ());
gdk_set_use_xshm (gimp_use_xshm ());
gtk_preview_set_gamma(gimp_gamma());
gtk_preview_set_install_cmap(gimp_install_cmap());
color_cube = gimp_color_cube();
gtk_preview_set_color_cube(color_cube[0], color_cube[1], color_cube[2], color_cube[3]);
gtk_widget_set_default_visual(gtk_preview_get_visual());
gtk_widget_set_default_colormap(gtk_preview_get_cmap());
dialog = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(dialog), "Diffraction patterns");
gtk_window_position(GTK_WINDOW(dialog), GTK_WIN_POS_MOUSE);
gtk_container_border_width(GTK_CONTAINER(dialog), 0);
gtk_signal_connect(GTK_OBJECT(dialog), "destroy",
(GtkSignalFunc) dialog_close_callback,
NULL);
top_table = gtk_table_new(2, 2, FALSE);
gtk_container_border_width(GTK_CONTAINER(top_table), 6);
gtk_table_set_row_spacings(GTK_TABLE(top_table), 4);
gtk_table_set_col_spacings(GTK_TABLE(top_table), 4);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->vbox), top_table, FALSE, FALSE, 0);
gtk_widget_show(top_table);
/* Preview */
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_border_width(GTK_CONTAINER(vbox), 0);
gtk_table_attach(GTK_TABLE(top_table), vbox, 0, 1, 0, 1,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show(vbox);
frame = gtk_frame_new(NULL);
gtk_frame_set_shadow_type(GTK_FRAME(frame), GTK_SHADOW_IN);
gtk_box_pack_start(GTK_BOX(vbox), frame, FALSE, FALSE, 0);
gtk_widget_show(frame);
dint.preview = gtk_preview_new(GTK_PREVIEW_COLOR);
gtk_preview_size(GTK_PREVIEW(dint.preview), PREVIEW_WIDTH, PREVIEW_HEIGHT);
gtk_container_add(GTK_CONTAINER(frame), dint.preview);
gtk_widget_show(dint.preview);
dint.progress = gtk_progress_bar_new();
gtk_widget_set_usize(dint.progress, PROGRESS_WIDTH, PROGRESS_HEIGHT);
gtk_box_pack_start(GTK_BOX(vbox), dint.progress, TRUE, FALSE, 0);
gtk_widget_show(dint.progress);
button = gtk_button_new_with_label("Preview!");
gtk_signal_connect(GTK_OBJECT(button), "clicked",
(GtkSignalFunc) dialog_update_callback,
NULL);
gtk_table_attach(GTK_TABLE(top_table), button, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show(button);
/* Notebook */
notebook = gtk_notebook_new();
gtk_notebook_set_tab_pos(GTK_NOTEBOOK(notebook), GTK_POS_TOP);
gtk_table_attach(GTK_TABLE(top_table), notebook, 1, 2, 0, 2, GTK_EXPAND | GTK_FILL, 0, 0, 0);
gtk_widget_show(notebook);
/* Frequencies tab */
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_border_width(GTK_CONTAINER(vbox), 4);
table = gtk_table_new(3, 2, FALSE);
gtk_container_border_width(GTK_CONTAINER(table), 0);
gtk_box_pack_start(GTK_BOX(vbox), table, TRUE, TRUE, 0);
gtk_widget_show(table);
dialog_create_value("Red", GTK_TABLE(table), 0, &dvals.lam_r, 0.0, 20.0);
dialog_create_value("Green", GTK_TABLE(table), 1, &dvals.lam_g, 0.0, 20.0);
dialog_create_value("Blue", GTK_TABLE(table), 2, &dvals.lam_b, 0.0, 20.0);
label = gtk_label_new("Frequencies");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 0.5);
gtk_notebook_append_page(GTK_NOTEBOOK(notebook), vbox, label);
gtk_widget_show(vbox);
/* Contours tab */
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_border_width(GTK_CONTAINER(vbox), 4);
table = gtk_table_new(3, 2, FALSE);
gtk_container_border_width(GTK_CONTAINER(table), 0);
gtk_box_pack_start(GTK_BOX(vbox), table, TRUE, TRUE, 0);
gtk_widget_show(table);
dialog_create_value("Red", GTK_TABLE(table), 0, &dvals.contour_r, 0.0, 10.0);
dialog_create_value("Green", GTK_TABLE(table), 1, &dvals.contour_g, 0.0, 10.0);
dialog_create_value("Blue", GTK_TABLE(table), 2, &dvals.contour_b, 0.0, 10.0);
label = gtk_label_new("Contours");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 0.5);
gtk_notebook_append_page(GTK_NOTEBOOK(notebook), vbox, label);
gtk_widget_show(vbox);
/* Sharp edges tab */
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_border_width(GTK_CONTAINER(vbox), 4);
table = gtk_table_new(3, 2, FALSE);
gtk_container_border_width(GTK_CONTAINER(table), 0);
gtk_box_pack_start(GTK_BOX(vbox), table, TRUE, TRUE, 0);
gtk_widget_show(table);
dialog_create_value("Red", GTK_TABLE(table), 0, &dvals.edges_r, 0.0, 1.0);
dialog_create_value("Green", GTK_TABLE(table), 1, &dvals.edges_g, 0.0, 1.0);
dialog_create_value("Blue", GTK_TABLE(table), 2, &dvals.edges_b, 0.0, 1.0);
label = gtk_label_new("Sharp edges");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 0.5);
gtk_notebook_append_page(GTK_NOTEBOOK(notebook), vbox, label);
gtk_widget_show(vbox);
/* Other options tab */
vbox = gtk_vbox_new(FALSE, 0);
gtk_container_border_width(GTK_CONTAINER(vbox), 4);
table = gtk_table_new(3, 2, FALSE);
gtk_container_border_width(GTK_CONTAINER(table), 0);
gtk_box_pack_start(GTK_BOX(vbox), table, TRUE, TRUE, 0);
gtk_widget_show(table);
dialog_create_value("Brightness", GTK_TABLE(table), 0, &dvals.brightness, 0.0, 1.0);
dialog_create_value("Scattering", GTK_TABLE(table), 1, &dvals.scattering, 0.0, 100.0);
dialog_create_value("Polarization", GTK_TABLE(table), 2, &dvals.polarization, -1.0, 1.0);
label = gtk_label_new("Other options");
gtk_misc_set_alignment(GTK_MISC(label), 0.5, 0.5);
gtk_notebook_append_page(GTK_NOTEBOOK(notebook), vbox, label);
gtk_widget_show(vbox);
/* Buttons */
gtk_container_border_width(GTK_CONTAINER(GTK_DIALOG(dialog)->action_area), 6);
button = gtk_button_new_with_label("OK");
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
gtk_signal_connect(GTK_OBJECT(button), "clicked",
(GtkSignalFunc) dialog_ok_callback,
dialog);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, TRUE, TRUE, 0);
gtk_widget_grab_default(button);
gtk_widget_show(button);
button = gtk_button_new_with_label("Cancel");
GTK_WIDGET_SET_FLAGS(button, GTK_CAN_DEFAULT);
gtk_signal_connect(GTK_OBJECT(button), "clicked",
(GtkSignalFunc) dialog_cancel_callback,
dialog);
gtk_box_pack_start(GTK_BOX(GTK_DIALOG(dialog)->action_area), button, TRUE, TRUE, 0);
gtk_widget_show(button);
/* Done */
gtk_widget_show(dialog);
dialog_update_preview();
gtk_main();
gdk_flush();
return dint.run;
} /* diffraction_dialog */
/*****/
static void
dialog_update_preview(void)
{
double left, right, bottom, top;
double px, py;
double dx, dy;
double r, g, b;
int x, y;
guchar *p;
left = -5.0;
right = 5.0;
bottom = -5.0;
top = 5.0;
dx = (right - left) / (PREVIEW_WIDTH - 1);
dy = (bottom - top) / (PREVIEW_HEIGHT - 1);
py = top;
for (y = 0; y < PREVIEW_HEIGHT; y++) {
px = left;
p = dint.preview_row;
for (x = 0; x < PREVIEW_WIDTH; x++) {
diff_diffract(px, py, &r, &g, &b);
*p++ = 255.0 * r;
*p++ = 255.0 * g;
*p++ = 255.0 * b;
px += dx;
} /* for */
gtk_preview_draw_row(GTK_PREVIEW(dint.preview), dint.preview_row, 0, y, PREVIEW_WIDTH);
gtk_progress_bar_update(GTK_PROGRESS_BAR(dint.progress), (double) y / (PREVIEW_HEIGHT - 1));
py += dy;
} /* for */
gtk_widget_draw(dint.preview, NULL);
gtk_progress_bar_update(GTK_PROGRESS_BAR(dint.progress), 0.0);
gdk_flush();
} /* dialog_update_preview */
/*****/
static void
dialog_create_value(char *title, GtkTable *table, int row, gdouble *value, double left, double right)
{
GtkWidget *label;
GtkWidget *scale;
GtkObject *scale_data;
label = gtk_label_new(title);
gtk_misc_set_alignment(GTK_MISC(label), 0.0, 1.0);
gtk_table_attach(table, label, 0, 1, row, row + 1, GTK_FILL, GTK_FILL, 4, 0);
gtk_widget_show(label);
scale_data = gtk_adjustment_new(*value, left, right,
(right - left) / 50.0,
(right - left) / 100.0,
0.0);
scale = gtk_hscale_new(GTK_ADJUSTMENT(scale_data));
gtk_widget_set_usize(scale, SCALE_WIDTH, 0);
gtk_table_attach(table, scale, 1, 2, row, row + 1, GTK_EXPAND | GTK_FILL, 0, 0, 0);
gtk_scale_set_value_pos(GTK_SCALE(scale), GTK_POS_TOP);
gtk_scale_set_digits(GTK_SCALE(scale), 3);
gtk_range_set_update_policy(GTK_RANGE(scale), GTK_UPDATE_CONTINUOUS);
gtk_signal_connect(GTK_OBJECT(scale_data), "value_changed",
(GtkSignalFunc) dialog_scale_update,
value);
gtk_widget_show(scale);
} /* dialog_create_value */
/*****/
static void
dialog_update_callback(GtkWidget *widget, gpointer data)
{
dialog_update_preview();
} /* dialog_update_callback */
/*****/
static void
dialog_scale_update(GtkAdjustment *adjustment, gdouble *value)
{
*value = adjustment->value;
} /* dialog_scale_update */
/*****/
static void
dialog_close_callback(GtkWidget *widget, gpointer data)
{
gtk_main_quit();
} /* dialog_close_callback */
/*****/
static void
dialog_ok_callback(GtkWidget *widget, gpointer data)
{
dint.run = TRUE;
gtk_widget_destroy(GTK_WIDGET(data));
} /* dialog_ok_callback */
/*****/
static void
dialog_cancel_callback(GtkWidget *widget, gpointer data)
{
gtk_widget_destroy(GTK_WIDGET(data));
} /* dialog_cancel_callback */
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