tests/testframe.c

   1 /* testframe.c
   2  * Copyright (C) 2007  Xan López <xan@gnome.org>
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Library General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Library General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Library General Public
  15  * License along with this library; if not, write to the
  16  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17  * Boston, MA 02111-1307, USA.
  18  */
  19
  20 #include <gtk/gtk.h>
  21 #include <math.h>
  22
  23 static void
  24 spin_ythickness_cb (GtkSpinButton *spin, gpointer user_data)
  25 {
  26   GtkWidget *frame = user_data;
  27   GtkRcStyle *rcstyle;
  28
  29   rcstyle = gtk_rc_style_new ();
  30   rcstyle->xthickness = GTK_WIDGET (frame)->style->xthickness;
  31   rcstyle->ythickness = gtk_spin_button_get_value (spin);
  32   gtk_widget_modify_style (frame, rcstyle);
  33
  34   g_object_unref (rcstyle);
  35 }
  36
  37 static void
  38 spin_xthickness_cb (GtkSpinButton *spin, gpointer user_data)
  39 {
  40   GtkWidget *frame = user_data;
  41   GtkRcStyle *rcstyle;
  42
  43   rcstyle = gtk_rc_style_new ();
  44   rcstyle->xthickness = gtk_spin_button_get_value (spin);
  45   rcstyle->ythickness = GTK_WIDGET (frame)->style->ythickness;
  46   gtk_widget_modify_style (frame, rcstyle);
  47
  48   g_object_unref (rcstyle);
  49 }
  50
  51 /* Function to normalize rounding errors in FP arithmetic to
  52    our desired limits */
  53
  54 #define EPSILON 1e-10
  55
  56 static gdouble
  57 double_normalize (gdouble n)
  58 {
  59   if (fabs (1.0 - n) < EPSILON)
  60     n = 1.0;
  61   else if (n < EPSILON)
  62     n = 0.0;
  63
  64   return n;
  65 }
  66
  67 static void
  68 spin_xalign_cb (GtkSpinButton *spin, GtkFrame *frame)
  69 {
  70   gdouble xalign = double_normalize (gtk_spin_button_get_value (spin));
  71   gtk_frame_set_label_align (frame, xalign, frame->label_yalign);
  72 }
  73
  74 static void
  75 spin_yalign_cb (GtkSpinButton *spin, GtkFrame *frame)
  76 {
  77   gdouble yalign = double_normalize (gtk_spin_button_get_value (spin));
  78   gtk_frame_set_label_align (frame, frame->label_xalign, yalign);
  79 }
  80
  81 int main (int argc, char **argv)
  82 {
  83   GtkWidget *window, *frame, *xthickness_spin, *ythickness_spin, *vbox;
  84   GtkWidget *xalign_spin, *yalign_spin, *button, *table, *label;
  85
  86   gtk_init (&argc, &argv);
  87
  88   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
  89   gtk_container_set_border_width (GTK_CONTAINER (window), 5);
  90   gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
  91
  92   g_signal_connect (G_OBJECT (window), "delete-event", gtk_main_quit, NULL);
  93
  94   vbox = gtk_vbox_new (FALSE, 5);
  95   gtk_container_add (GTK_CONTAINER (window), vbox);
  96
  97   frame = gtk_frame_new ("Testing");
  98   gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
  99
 100   button = gtk_button_new_with_label ("Hello!");
 101   gtk_container_add (GTK_CONTAINER (frame), button);
 102
 103   table = gtk_table_new (4, 2, FALSE);
 104   gtk_box_pack_start (GTK_BOX (vbox), table, FALSE, FALSE, 0);
 105
 106   /* Spin to control xthickness */
 107   label = gtk_label_new ("xthickness: ");
 108   gtk_table_attach_defaults (GTK_TABLE (table), label, 0, 1, 0, 1);
 109
 110   xthickness_spin = gtk_spin_button_new_with_range (0, 250, 1);
 111   g_signal_connect (G_OBJECT (xthickness_spin), "value-changed", G_CALLBACK (spin_xthickness_cb), frame);
 112   gtk_spin_button_set_value (GTK_SPIN_BUTTON (xthickness_spin), frame->style->xthickness);
 113   gtk_table_attach_defaults (GTK_TABLE (table), xthickness_spin, 1, 2, 0, 1);
 114
 115   /* Spin to control ythickness */
 116   label = gtk_label_new ("ythickness: ");
 117   gtk_table_attach_defaults (GTK_TABLE (table), label, 0, 1, 1, 2);
 118
 119   ythickness_spin = gtk_spin_button_new_with_range (0, 250, 1);
 120   g_signal_connect (G_OBJECT (ythickness_spin), "value-changed", G_CALLBACK (spin_ythickness_cb), frame);
 121   gtk_spin_button_set_value (GTK_SPIN_BUTTON (ythickness_spin), frame->style->ythickness);
 122   gtk_table_attach_defaults (GTK_TABLE (table), ythickness_spin, 1, 2, 1, 2);
 123
 124   /* Spin to control label xalign */
 125   label = gtk_label_new ("xalign: ");
 126   gtk_table_attach_defaults (GTK_TABLE (table), label, 0, 1, 2, 3);
 127
 128   xalign_spin = gtk_spin_button_new_with_range (0.0, 1.0, 0.1);
 129   g_signal_connect (G_OBJECT (xalign_spin), "value-changed", G_CALLBACK (spin_xalign_cb), frame);
 130   gtk_spin_button_set_value (GTK_SPIN_BUTTON (xalign_spin), GTK_FRAME (frame)->label_xalign);
 131   gtk_table_attach_defaults (GTK_TABLE (table), xalign_spin, 1, 2, 2, 3);
 132
 133   /* Spin to control label yalign */
 134   label = gtk_label_new ("yalign: ");
 135   gtk_table_attach_defaults (GTK_TABLE (table), label, 0, 1, 3, 4);
 136
 137   yalign_spin = gtk_spin_button_new_with_range (0.0, 1.0, 0.1);
 138   g_signal_connect (G_OBJECT (yalign_spin), "value-changed", G_CALLBACK (spin_yalign_cb), frame);
 139   gtk_spin_button_set_value (GTK_SPIN_BUTTON (yalign_spin), GTK_FRAME (frame)->label_yalign);
 140   gtk_table_attach_defaults (GTK_TABLE (table), yalign_spin, 1, 2, 3, 4);
 141
 142   gtk_widget_show_all (window);
 143
 144   gtk_main ();
 145
 146   return 0;
 147 }