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/* $Id: logarithmic.c 4 2008-06-22 09:19:11Z rbock $ */
/* GtkDatabox - An extension to the gtk+ library
* Copyright (C) 1998 - 2008 Dr. Roland Bock
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* 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 Lesser 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <gtk/gtk.h>
#include <gtkdatabox.h>
#include <gtkdatabox_points.h>
#include <gtkdatabox_ruler.h>
#include <math.h>
#define POINTS 100000
/*
#define STEPS 50
#define BARS 25
#define MARKER 10
*/
#define NO_BOXES 4
/*----------------------------------------------------------------
* databox logarithmic
*----------------------------------------------------------------*/
static void
create_logarithmic (void)
{
GtkWidget *window = NULL;
GtkWidget *hbox;
GtkWidget *vbox;
GtkWidget *close_button;
GtkWidget *box[NO_BOXES];
GtkWidget *label;
GtkWidget *separator;
GtkWidget *table;
GtkDataboxGraph *graph;
gfloat min_x, max_x;
gfloat min_y, max_y;
gfloat *X;
gfloat *Y;
GdkRGBA color;
gint i;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request (window, 1000, 500);
g_signal_connect (G_OBJECT (window), "destroy",
G_CALLBACK (gtk_main_quit), NULL);
gtk_window_set_title (GTK_WINDOW (window),
"GtkDatabox: Logarithmic Plots");
gtk_container_set_border_width (GTK_CONTAINER (window), 0);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
label = gtk_label_new
("The following types of curves are shown (with some adjustments to make them fit nicely into the window):\n Green: sin^2, Red: exp, Magenta: 1/x, Yellow: x^2\n(100K Points per each curve in each graph)\n");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
separator = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, FALSE, 0);
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
label = gtk_label_new ("Linear Plot:");
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
label = gtk_label_new ("Logarithmic Plot:");
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
label = gtk_label_new ("Double Logarithmic Plot:");
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
label = gtk_label_new ("Log base 2 Plot:");
gtk_box_pack_start (GTK_BOX (hbox), label, TRUE, TRUE, 0);
separator = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, FALSE, 0);
/* Create the databoxes */
hbox = gtk_box_new (GTK_ORIENTATION_HORIZONTAL, 0);
gtk_box_pack_start (GTK_BOX (vbox), hbox, TRUE, TRUE, 0);
for (i = 0; i < NO_BOXES; ++i)
{
gtk_databox_create_box_with_scrollbars_and_rulers (&box[i], &table,
TRUE, TRUE, TRUE,
TRUE);
gtk_box_pack_start (GTK_BOX (hbox), table, TRUE, TRUE, 0);
}
/* set the background */
color.red = 0.33;
color.green = 0.33;
color.blue = 0.33;
color.alpha = 1;
for (i = 0; i < NO_BOXES; ++i)
gtk_widget_override_background_color (box[i], GTK_STATE_FLAG_NORMAL, &color);
/* add a sinus^2 */
X = g_new0 (gfloat, POINTS);
Y = g_new0 (gfloat, POINTS);
for (i = 0; i < POINTS; i++)
{
X[i] = i / 100.;
Y[i] = 0.01 + 1000 * pow (sin (i * G_PI / POINTS), 2);
}
color.red = 0;
color.green = 1;
color.blue = 0;
color.alpha = 1;
graph = gtk_databox_points_new (POINTS, X, Y, &color, 1);
for (i = 0; i < NO_BOXES; ++i)
gtk_databox_graph_add (GTK_DATABOX (box[i]), graph);
/* add an exp function */
X = g_new0 (gfloat, POINTS);
Y = g_new0 (gfloat, POINTS);
for (i = 0; i < POINTS; i++)
{
X[i] = i / 100.;
Y[i] = exp (log (1000) * i / ((gfloat) POINTS));
}
color.red = 1;
color.green = 0;
color.blue = 0;
color.alpha = 1;
graph = gtk_databox_points_new (POINTS, X, Y, &color, 1);
for (i = 0; i < NO_BOXES; ++i)
gtk_databox_graph_add (GTK_DATABOX (box[i]), graph);
/* add an 1/x function */
X = g_new0 (gfloat, POINTS);
Y = g_new0 (gfloat, POINTS);
for (i = 0; i < POINTS; i++)
{
X[i] = i / 100.;
Y[i] = 1000. / (100. * (gfloat) i / POINTS);
}
color.red = 1;
color.green = 0;
color.blue = 1;
color.alpha = 1;
graph = gtk_databox_points_new (POINTS, X, Y, &color, 1);
for (i = 0; i < NO_BOXES; ++i)
gtk_databox_graph_add (GTK_DATABOX (box[i]), graph);
/* add an x^2 function */
X = g_new0 (gfloat, POINTS);
Y = g_new0 (gfloat, POINTS);
for (i = 0; i < POINTS; i++)
{
X[i] = i / 100.;
Y[i] = 1000. * (gfloat) i / POINTS * (gfloat) i / POINTS;
}
color.red = 1;
color.green = 1;
color.blue = 0;
color.alpha = 1;
graph = gtk_databox_points_new (POINTS, X, Y, &color, 1);
for (i = 0; i < NO_BOXES; ++i)
gtk_databox_graph_add (GTK_DATABOX (box[i]), graph);
/* set the extrema */
min_x = 0.01;
max_x = 1000.;
min_y = 1000.;
max_y = 0.01;
for (i = 0; i < NO_BOXES-1; ++i)
gtk_databox_set_total_limits (GTK_DATABOX (box[i]), min_x, max_x, min_y,
max_y);
gtk_databox_set_total_limits (GTK_DATABOX (box[i]), 8, max_x, min_y,
max_y);
gtk_databox_set_scale_type_y (GTK_DATABOX (box[1]), GTK_DATABOX_SCALE_LOG);
gtk_databox_set_scale_type_x (GTK_DATABOX (box[2]), GTK_DATABOX_SCALE_LOG);
gtk_databox_set_scale_type_y (GTK_DATABOX (box[2]), GTK_DATABOX_SCALE_LOG);
gtk_databox_set_scale_type_x (GTK_DATABOX (box[3]), GTK_DATABOX_SCALE_LOG2);
separator = gtk_separator_new (GTK_ORIENTATION_HORIZONTAL);
gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, TRUE, 0);
close_button = gtk_button_new_with_label ("close");
g_signal_connect (G_OBJECT (close_button), "clicked",
G_CALLBACK (gtk_main_quit), NULL);
gtk_box_pack_start (GTK_BOX (vbox), close_button, FALSE, FALSE, 0);
gtk_widget_set_can_default(close_button, TRUE);
gtk_widget_grab_default (close_button);
gtk_widget_grab_focus (close_button);
gtk_widget_show_all (window);
for (i = 0; i < NO_BOXES; ++i)
gdk_window_set_cursor (gtk_widget_get_window(box[i]), gdk_cursor_new (GDK_CROSS));
}
gint
main (gint argc, char *argv[])
{
gtk_init (&argc, &argv);
create_logarithmic ();
gtk_main ();
return 0;
}

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