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/* testframe.c
* Copyright (C) 2007 Xan López <xan@gnome.org>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include <gtk/gtk.h>
#include <math.h>
/* Function to normalize rounding errors in FP arithmetic to
our desired limits */
#define EPSILON 1e-10
static double
double_normalize (double n)
{
if (fabs (1.0 - n) < EPSILON)
n = 1.0;
else if (n < EPSILON)
n = 0.0;
return n;
}
static void
spin_xalign_cb (GtkSpinButton *spin, GtkFrame *frame)
{
double xalign;
xalign = double_normalize (gtk_spin_button_get_value (spin));
gtk_frame_set_label_align (frame, xalign);
}
static void
quit_cb (GtkWidget *widget,
gpointer data)
{
gboolean *done = data;
*done = TRUE;
g_main_context_wakeup (NULL);
}
int main (int argc, char **argv)
{
GtkWidget *window, *widget;
GtkBox *vbox;
GtkFrame *frame;
GtkGrid *grid;
float xalign;
gboolean done = FALSE;
gtk_init ();
window = gtk_window_new ();
gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
vbox = GTK_BOX (gtk_box_new (GTK_ORIENTATION_VERTICAL, 5));
gtk_widget_set_margin_start (GTK_WIDGET (vbox), 12);
gtk_widget_set_margin_end (GTK_WIDGET (vbox), 12);
gtk_widget_set_margin_top (GTK_WIDGET (vbox), 12);
gtk_widget_set_margin_bottom (GTK_WIDGET (vbox), 12);
gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (vbox));
frame = GTK_FRAME (gtk_frame_new ("Test GtkFrame"));
gtk_widget_set_vexpand (GTK_WIDGET (frame), TRUE);
gtk_box_append (GTK_BOX (vbox), GTK_WIDGET (frame));
widget = gtk_button_new_with_label ("Hello!");
gtk_frame_set_child (GTK_FRAME (frame), widget);
grid = GTK_GRID (gtk_grid_new ());
gtk_grid_set_row_spacing (grid, 12);
gtk_grid_set_column_spacing (grid, 6);
gtk_box_append (GTK_BOX (vbox), GTK_WIDGET (grid));
xalign = gtk_frame_get_label_align (frame);
/* Spin to control :label-xalign */
widget = gtk_label_new ("label xalign:");
gtk_grid_attach (grid, widget, 0, 0, 1, 1);
widget = gtk_spin_button_new_with_range (0.0, 1.0, 0.1);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (widget), xalign);
g_signal_connect (widget, "value-changed", G_CALLBACK (spin_xalign_cb), frame);
gtk_grid_attach (grid, widget, 1, 0, 1, 1);
gtk_window_present (GTK_WINDOW (window));
while (!done)
g_main_context_iteration (NULL, TRUE);
return 0;
}
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