/* GtkDatabox - An extension to the gtk+ library
 * Copyright (C) 1998 - 2004  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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
#include <stdio.h>

#include <gtk/gtk.h>
#include <gtkdatabox.h>
#include <math.h>
/* Some versions of math.h have a PI problem... */
#ifndef PI
#define PI 3.14159265358979323846
#endif

#define POINTS 2000

/*----------------------------------------------------------------
 *  databox signals
 *----------------------------------------------------------------*/

/* 
 * Signal handlers 
 */
static gint
handle_signal_zoomed (GtkDatabox * box,
		      GtkDataboxValue * top_left,
		      GtkDataboxValue * bottom_right, void *unused)
{
   printf ("Name of the signal: gtk_databox_zoomed\n");
   printf ("It tells you that the GtkDatabox has zoomed to the following\n");
   printf
      ("rectangle (data coordindates only, pixels don't make sense here):\n");
   printf ("top_left (X,Y)=(%g, %g), bottom_right (X,Y)=(%g, %g)\n",
	   top_left->x, top_left->y, bottom_right->x, bottom_right->y);

   return 0;
}

static gint
handle_signal_marked (GtkDatabox * box,
		      GtkDataboxCoord * marked, void *unused)
{
   GtkDataboxValue value;

   gtk_databox_data_get_value (box, *marked, &value);

   printf ("Name of the signal: gtk_databox_marked\n");
   printf
      ("It tells you that someone has clicked at the following coordinates:\n");
   printf ("Pixel: (X,Y)=(%d, %d)\n", marked->x, marked->y);
   printf ("Data: (X,Y)=(%g, %g)\n", value.x, value.y);

   return 0;
}

static gint
handle_signal_selection_started (GtkDatabox * box,
				 GtkDataboxCoord * marked, void *unused)
{
   GtkDataboxValue value;

   gtk_databox_data_get_value (box, *marked, &value);

   printf ("Name of the signal: gtk_databox_selection_started\n");
   printf ("It tells you that someone has started a selection at\n");
   printf ("the following coordinates:\n");
   printf ("Pixel: (X,Y)=(%d, %d)\n", marked->x, marked->y);
   printf ("Data: (X,Y)=(%g, %g)\n", value.x, value.y);
   return 0;
}

static gint
handle_signal_selection_changed (GtkDatabox * box,
				 GtkDataboxCoord * marked,
				 GtkDataboxCoord * select, void *unused)
{
   GtkDataboxValue value1;
   GtkDataboxValue value2;

   gtk_databox_data_get_value (box, *marked, &value1);
   gtk_databox_data_get_value (box, *select, &value2);

   printf ("Name of the signal: gtk_databox_selection_changed\n");
   printf ("It tells you that a user has changed the selection box.\n");
   printf ("Pixel: corner1 (X,Y)=(%d, %d), corner2 (X,Y)=(%d, %d)\n",
	   marked->x, marked->y, select->x, select->y);
   printf ("Data: corner1 (X,Y)=(%g, %g), corner2 (X,Y)=(%g, %g)\n",
	   value1.x, value1.y, value2.x, value2.y);

   return 0;
}

static gint
handle_signal_selection_stopped (GtkDatabox * box,
				 GtkDataboxCoord * marked,
				 GtkDataboxCoord * select, void *unused)
{
   GtkDataboxValue value1;
   GtkDataboxValue value2;

   gtk_databox_data_get_value (box, *marked, &value1);
   gtk_databox_data_get_value (box, *select, &value2);

   printf ("Name of the signal: gtk_databox_selection_stopped\n");
   printf ("It tells you that the user has stopped changing the selection\n");
   printf ("box, i.e. the mouse button is released now.\n");
   printf ("Pixel: corner1 (X,Y)=(%d, %d), corner2 (X,Y)=(%d, %d)\n",
	   marked->x, marked->y, select->x, select->y);
   printf ("Data: corner1 (X,Y)=(%g, %g), corner2 (X,Y)=(%g, %g)\n",
	   value1.x, value1.y, value2.x, value2.y);

   return 0;
}

static gint
handle_signal_selection_cancelled (GtkDatabox * box, void *unused)
{
   printf ("Name of the signal: gtk_databox_selection_cancelled\n");
   printf ("It tells you that the user has dismissed the selection box\n");

   return 0;
}

static void
create_signals (void)
{
   GtkWidget *window = NULL;
   GtkWidget *box1;
   GtkWidget *box2;
   GtkWidget *close_button;
   GtkWidget *box;
   GtkWidget *label;
   GtkWidget *separator;
   gint index;
   gfloat *X;
   gfloat *Y;
   GdkColor color;
   gint i;

   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
   gtk_widget_set_size_request (window, 300, 300);

   g_signal_connect (GTK_OBJECT (window), "destroy",
		     GTK_SIGNAL_FUNC (gtk_main_quit), NULL);

   gtk_window_set_title (GTK_WINDOW (window), "GtkDatabox: Signals Examples");
   gtk_container_set_border_width (GTK_CONTAINER (window), 0);

   box1 = gtk_vbox_new (FALSE, 0);
   gtk_container_add (GTK_CONTAINER (window), box1);

   label =
      gtk_label_new
      ("The output on the shell shows you the information that\nyou can get by using signals.\n\nSee basics for a usage of this window...");
   gtk_box_pack_start (GTK_BOX (box1), label, FALSE, FALSE, 0);
   separator = gtk_hseparator_new ();
   gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, FALSE, 0);

   box = gtk_databox_new ();
   g_signal_connect (GTK_OBJECT (box), "destroy",
		     GTK_SIGNAL_FUNC (gtk_databox_data_destroy_all), NULL);

   X = g_new0 (gfloat, POINTS);
   Y = g_new0 (gfloat, POINTS);

   for (i = 0; i < POINTS; i++)
   {
      X[i] = i;
      Y[i] = 100. * sin (i * 2 * PI / POINTS);
   }
   color.red = 0;
   color.green = 65535;
   color.blue = 0;

   index = gtk_databox_data_add_x_y (GTK_DATABOX (box), POINTS,
				     X, Y, color, GTK_DATABOX_POINTS, 1);
   Y = g_new0 (gfloat, POINTS);

   for (i = 0; i < POINTS; i++)
   {
      Y[i] = 100. * cos (i * 2 * PI / POINTS);
   }
   color.red = 65535;
   color.green = 0;
   color.blue = 0;

   gtk_databox_data_add_y (GTK_DATABOX (box), POINTS,
			   Y, index, color, GTK_DATABOX_POINTS, 1);
   gtk_databox_rescale (GTK_DATABOX (box));

   gtk_box_pack_start (GTK_BOX (box1), box, TRUE, TRUE, 0);

   separator = gtk_hseparator_new ();
   gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);

   box2 = gtk_vbox_new (FALSE, 10);
   gtk_container_set_border_width (GTK_CONTAINER (box2), 10);
   gtk_box_pack_end (GTK_BOX (box1), box2, FALSE, TRUE, 0);
   close_button = gtk_button_new_with_label ("close");
   g_signal_connect_swapped (GTK_OBJECT (close_button), "clicked",
			     GTK_SIGNAL_FUNC (gtk_main_quit),
			     GTK_OBJECT (box));
   gtk_box_pack_start (GTK_BOX (box2), close_button, TRUE, TRUE, 0);
   GTK_WIDGET_SET_FLAGS (close_button, GTK_CAN_DEFAULT);
   gtk_widget_grab_default (close_button);

   g_signal_connect (GTK_OBJECT (box), "gtk_databox_zoomed",
		     GTK_SIGNAL_FUNC (handle_signal_zoomed), NULL);
   g_signal_connect (GTK_OBJECT (box), "gtk_databox_marked",
		     GTK_SIGNAL_FUNC (handle_signal_marked), NULL);
   g_signal_connect (GTK_OBJECT (box), "gtk_databox_selection_started",
		     GTK_SIGNAL_FUNC (handle_signal_selection_started), NULL);

   g_signal_connect (GTK_OBJECT (box), "gtk_databox_selection_changed",
		     GTK_SIGNAL_FUNC (handle_signal_selection_changed), NULL);
   g_signal_connect (GTK_OBJECT (box), "gtk_databox_selection_stopped",
		     GTK_SIGNAL_FUNC (handle_signal_selection_stopped), NULL);
   g_signal_connect (GTK_OBJECT (box), "gtk_databox_selection_cancelled",
		     GTK_SIGNAL_FUNC (handle_signal_selection_cancelled),
		     NULL);
   gtk_widget_show_all (window);

}

gint
main (gint argc, char *argv[])
{
   gtk_init (&argc, &argv);

   create_signals ();
   gtk_main ();

   return 0;
}