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110 lines
3.0 KiB
C
110 lines
3.0 KiB
C
/* testframe.c
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* Copyright (C) 2007 Xan López <xan@gnome.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <gtk/gtk.h>
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#include <math.h>
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/* Function to normalize rounding errors in FP arithmetic to
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our desired limits */
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#define EPSILON 1e-10
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static double
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double_normalize (double n)
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{
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if (fabs (1.0 - n) < EPSILON)
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n = 1.0;
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else if (n < EPSILON)
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n = 0.0;
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return n;
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}
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static void
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spin_xalign_cb (GtkSpinButton *spin, GtkFrame *frame)
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{
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double xalign;
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xalign = double_normalize (gtk_spin_button_get_value (spin));
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gtk_frame_set_label_align (frame, xalign);
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}
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static void
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quit_cb (GtkWidget *widget,
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gpointer data)
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{
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gboolean *done = data;
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*done = TRUE;
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g_main_context_wakeup (NULL);
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}
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int main (int argc, char **argv)
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{
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GtkWidget *window, *widget;
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GtkBox *vbox;
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GtkFrame *frame;
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GtkGrid *grid;
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float xalign;
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gboolean done = FALSE;
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gtk_init ();
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window = gtk_window_new ();
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gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
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g_signal_connect (window, "destroy", G_CALLBACK (quit_cb), &done);
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vbox = GTK_BOX (gtk_box_new (GTK_ORIENTATION_VERTICAL, 5));
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gtk_widget_set_margin_start (GTK_WIDGET (vbox), 12);
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gtk_widget_set_margin_end (GTK_WIDGET (vbox), 12);
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gtk_widget_set_margin_top (GTK_WIDGET (vbox), 12);
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gtk_widget_set_margin_bottom (GTK_WIDGET (vbox), 12);
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gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (vbox));
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frame = GTK_FRAME (gtk_frame_new ("Test GtkFrame"));
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gtk_widget_set_vexpand (GTK_WIDGET (frame), TRUE);
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gtk_box_append (GTK_BOX (vbox), GTK_WIDGET (frame));
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widget = gtk_button_new_with_label ("Hello!");
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gtk_frame_set_child (GTK_FRAME (frame), widget);
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grid = GTK_GRID (gtk_grid_new ());
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gtk_grid_set_row_spacing (grid, 12);
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gtk_grid_set_column_spacing (grid, 6);
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gtk_box_append (GTK_BOX (vbox), GTK_WIDGET (grid));
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xalign = gtk_frame_get_label_align (frame);
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/* Spin to control :label-xalign */
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widget = gtk_label_new ("label xalign:");
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gtk_grid_attach (grid, widget, 0, 0, 1, 1);
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widget = gtk_spin_button_new_with_range (0.0, 1.0, 0.1);
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gtk_spin_button_set_value (GTK_SPIN_BUTTON (widget), xalign);
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g_signal_connect (widget, "value-changed", G_CALLBACK (spin_xalign_cb), frame);
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gtk_grid_attach (grid, widget, 1, 0, 1, 1);
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gtk_window_present (GTK_WINDOW (window));
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while (!done)
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g_main_context_iteration (NULL, TRUE);
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return 0;
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}
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