static void
create_basics (void)
{
GtkWidget *window = NULL;
GtkWidget *vbox;
GtkWidget *close_button;
GtkWidget *box;
GtkWidget *label;
GtkWidget *separator;
GtkWidget *table;
GtkWidget *scrollbar;
GtkWidget *ruler;
GtkDataboxGraph *graph;
gfloat min_x, max_x;
gfloat min_y, max_y;
gfloat *X;
gfloat *Y;
gfloat buffer;
GdkColor color;
gint i;
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_widget_set_size_request (window, 500, 500);
g_signal_connect (GTK_OBJECT (window), "destroy",
G_CALLBACK (gtk_main_quit), NULL);
gtk_window_set_title (GTK_WINDOW (window), "GtkDatabox: Basics");
gtk_container_set_border_width (GTK_CONTAINER (window), 0);
vbox = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), vbox);
label =
gtk_label_new
("\nThe code for this example demonstrates\n the the basic use of elementary functions\nfor utilizing the GtkDatabox widget.\n\nUsage:\nDraw a selection with the left button pressed,\nThan click into the selection.\nUse the right mouse button to zoom out.\nShift+ right mouse button zooms to default.");
gtk_box_pack_start (GTK_BOX (vbox), label, FALSE, FALSE, 0);
separator = gtk_hseparator_new ();
gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, FALSE, 0);
/* Instead of the following stuff, you could also call
* gtk_databox_create_box_with_scrollbars_and_rulers
* as it is done in the other examples.
* Of course, you are more flexible in using scrollbars and rulers
* by doing it yourself. */
table = gtk_table_new (3, 3, FALSE);
box = gtk_databox_new ();
gtk_table_attach (GTK_TABLE (table), box, 1, 2, 1, 2,
GTK_FILL | GTK_EXPAND | GTK_SHRINK,
GTK_FILL | GTK_EXPAND | GTK_SHRINK, 0, 0);
/* You can associate a scrollbar with a GtkDatabox widget either
* this way ...*/
scrollbar = gtk_hscrollbar_new (NULL);
gtk_databox_set_adjustment_x (GTK_DATABOX (box),
gtk_range_get_adjustment (GTK_RANGE
(scrollbar)));
gtk_table_attach (GTK_TABLE (table), scrollbar, 1, 2, 2, 3,
GTK_FILL | GTK_EXPAND | GTK_SHRINK, GTK_FILL, 0, 0);
/* or this way ... */
scrollbar = gtk_vscrollbar_new
(gtk_databox_get_adjustment_y (GTK_DATABOX (box)));
gtk_table_attach (GTK_TABLE (table), scrollbar, 2, 3, 1, 2,
GTK_FILL, GTK_FILL | GTK_EXPAND | GTK_SHRINK, 0, 0);
ruler = gtk_databox_ruler_new (GTK_ORIENTATION_HORIZONTAL);
gtk_widget_set_sensitive (ruler, FALSE);
gtk_table_attach (GTK_TABLE (table), ruler, 1, 2, 0, 1,
GTK_FILL | GTK_EXPAND | GTK_SHRINK, GTK_FILL, 0, 0);
gtk_databox_set_ruler_x (GTK_DATABOX (box), GTK_DATABOX_RULER (ruler));
ruler = gtk_databox_ruler_new (GTK_ORIENTATION_VERTICAL);
gtk_widget_set_sensitive (ruler, FALSE);
gtk_table_attach (GTK_TABLE (table), ruler, 0, 1, 1, 2,
GTK_FILL, GTK_FILL | GTK_EXPAND | GTK_SHRINK, 0, 0);
gtk_databox_set_ruler_y (GTK_DATABOX (box), GTK_DATABOX_RULER (ruler));
/* end of gtk_databox_create_box_with_scrollbars_and_rulers */
gtk_box_pack_start (GTK_BOX (vbox), table, TRUE, TRUE, 0);
color.red = 16383;
color.green = 16383;
color.blue = 16383;
gtk_widget_modify_bg (box, GTK_STATE_NORMAL, &color);
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 * G_PI / POINTS);
}
color.red = 0;
color.green = 65535;
color.blue = 0;
graph = gtk_databox_points_new (POINTS, X, Y, &color, 1);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
X = g_new0 (gfloat, STEPS);
Y = g_new0 (gfloat, STEPS);
for (i = 0; i < STEPS / 2; i++)
{
X[i * 2] = X[i * 2 + 1] = 2 * (i + .5) * POINTS / STEPS;
if (i > 0)
Y[i * 2 - 1] = 100. * sin ((i * 2) * 2 * G_PI / STEPS);
Y[i * 2] = 100. * sin ((i * 2) * 2 * G_PI / STEPS);
if (i == STEPS / 2 - 1)
Y[i * 2 + 1] = 100. * sin (((i + 1) * 2) * 2 * G_PI / STEPS);
}
color.red = 65535;
color.green = 0;
color.blue = 0;
graph = gtk_databox_lines_new (STEPS, X, Y, &color, 1);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
X = g_new0 (gfloat, BARS);
Y = g_new0 (gfloat, BARS);
for (i = 0; i < BARS; i++)
{
X[i] = i * POINTS / BARS;
Y[i] = 80. * sin (i * 2 * G_PI / BARS);
}
color.red = 0;
color.green = 65535;
color.blue = 65535;
graph = gtk_databox_bars_new (BARS, X, Y, &color, 1);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
color.red = 32768;
color.green = 32768;
color.blue = 32768;
graph = gtk_databox_cross_simple_new (&color, 0);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
/* Instead of doing stuff what you see below, you could call
* gtk_databox_auto_rescale (GTK_DATABOX (box), 0.05);
* as is done in the other examples
* Of course, you are more flexible in adjusting the scaling by doing
* it yourself, though. */
if (0 >
gtk_databox_calculate_extrema (GTK_DATABOX (box), &min_x, &max_x,
&min_y, &max_y))
{
g_warning ("Calculating extrema failed. Resorting to default values");
min_x = -100.;
min_y = -100.;
max_x = +100.;
max_y = +100.;
}
else
{
gfloat width = max_x - min_x;
gfloat height = max_y - min_y;
gfloat border = 0.05;
min_x -= border * width;
min_y -= border * height;
max_x += border * width;
max_y += border * height;
}
/* We want larger y values to be higher on the screen */
buffer = min_y;
min_y = max_y;
max_y = buffer;
gtk_databox_set_total_limits (GTK_DATABOX (box), min_x, max_x, min_y,
max_y);
/* end of gtk_databox_auto_rescale */
separator = gtk_hseparator_new ();
gtk_box_pack_start (GTK_BOX (vbox), separator, FALSE, TRUE, 0);
close_button = gtk_button_new_with_label ("close");
g_signal_connect_swapped (GTK_OBJECT (close_button), "clicked",
G_CALLBACK (gtk_main_quit), GTK_OBJECT (box));
gtk_box_pack_start (GTK_BOX (vbox), close_button, FALSE, FALSE, 0);
gtk_widget_set_can_default(close_button, GTK_CAN_DEFAULT);
gtk_widget_grab_default (close_button);
gtk_widget_grab_focus (close_button);
gtk_widget_show_all (window);
gdk_window_set_cursor (box->window, gdk_cursor_new (GDK_CROSS));
}
static void
create_basics ()
{
GtkWidget *window = NULL;
GtkWidget *box;
GtkWidget *scrollbar;
GtkWidget *ruler;
GtkDataboxGraph *graph;
gfloat min_x, max_x;
gfloat min_y, max_y;
gfloat *X;
gfloat *Y;
gfloat buffer;
GdkRGBA color;
gint i;
GladeXML *gxml;
gxml = glade_xml_new (GLADE_FILE, NULL, NULL);
/* This is important */
glade_xml_signal_autoconnect (gxml);
window = glade_xml_get_widget (gxml, "window");
/* You could associate a scrollbar with a GtkDatabox widget either
* this way ...*/
scrollbar = glade_xml_get_widget (gxml, "scrollbar_x");
box = glade_xml_get_widget (gxml, "box");
gtk_databox_set_adjustment_x (GTK_DATABOX (box),
gtk_range_get_adjustment (GTK_RANGE
(scrollbar)));
/* or this way ... */
scrollbar = glade_xml_get_widget (gxml, "scrollbar_y");
gtk_databox_set_adjustment_y (GTK_DATABOX (box),
gtk_range_get_adjustment (GTK_RANGE
(scrollbar)));
ruler = glade_xml_get_widget (gxml, "ruler_x");
gtk_databox_set_ruler_x (GTK_DATABOX (box), GTK_DATABOX_RULER (ruler));
ruler = glade_xml_get_widget (gxml, "ruler_y");
gtk_databox_set_ruler_y (GTK_DATABOX (box), GTK_DATABOX_RULER (ruler));
/* end of gtk_databox_create_box_with_scrollbars_and_rulers */
color.red = 0.33;
color.green = 0.33;
color.blue = 0.33;
gtk_widget_override_background_color (box, GTK_STATE_FLAG_NORMAL, &color);
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 * G_PI / POINTS);
}
color.red = 0;
color.green = 1;
color.blue = 0;
color.alpha = 1;
graph = gtk_databox_points_new (POINTS, X, Y, &color, 1);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
X = g_new0 (gfloat, STEPS);
Y = g_new0 (gfloat, STEPS);
for (i = 0; i < STEPS / 2; i++)
{
X[i * 2] = X[i * 2 + 1] = 2 * (i + .5) * POINTS / STEPS;
if (i > 0)
Y[i * 2 - 1] = 100. * sin ((i * 2) * 2 * G_PI / STEPS);
Y[i * 2] = 100. * sin ((i * 2) * 2 * G_PI / STEPS);
if (i == STEPS / 2 - 1)
Y[i * 2 + 1] = 100. * sin (((i + 1) * 2) * 2 * G_PI / STEPS);
}
color.red = 1;
color.green = 0;
color.blue = 0;
color.alpha = 1;
graph = gtk_databox_lines_new (STEPS, X, Y, &color, 1);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
X = g_new0 (gfloat, BARS);
Y = g_new0 (gfloat, BARS);
for (i = 0; i < BARS; i++)
{
X[i] = i * POINTS / BARS;
Y[i] = 80. * sin (i * 2 * G_PI / BARS);
}
color.red = 0;
color.green = 1;
color.blue = 1;
color.alpha = 1;
graph = gtk_databox_bars_new (BARS, X, Y, &color, 1);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
color.red = 0.5;
color.green = 0.5;
color.blue = 0.5;
graph = gtk_databox_cross_simple_new (&color, 0);
gtk_databox_graph_add (GTK_DATABOX (box), graph);
/* Instead of doing stuff what you see below, you could call
* gtk_databox_auto_rescale (GTK_DATABOX (box), 0.05);
* as is done in the other examples
* Of course, you are more flexible in adjusting the scaling by doing
* it yourself, though. */
if (0 >
gtk_databox_calculate_extrema (GTK_DATABOX (box), &min_x, &max_x,
&min_y, &max_y))
{
g_warning ("Calculating extrema failed. Resorting to default values");
min_x = -100.;
min_y = -100.;
max_x = +100.;
max_y = +100.;
}
else
{
gfloat width = max_x - min_x;
gfloat height = max_y - min_y;
gfloat border = 0.05;
min_x -= border * width;
min_y -= border * height;
max_x += border * width;
max_y += border * height;
}
/* We want larger y values to be higher on the screen */
buffer = min_y;
min_y = max_y;
max_y = buffer;
gtk_databox_set_total_limits (GTK_DATABOX (box), min_x, max_x, min_y,
max_y);
/* end of gtk_databox_auto_rescale */
gtk_widget_show (window);
gdk_window_set_cursor (box->window, gdk_cursor_new (GDK_CROSS));
}