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, see <http://www.gnu.org/licenses/>. |
16 | */ |
17 | |
18 | #include <gtk/gtk.h> |
19 | #include <math.h> |
20 | |
21 | /* Function to normalize rounding errors in FP arithmetic to |
22 | our desired limits */ |
23 | |
24 | #define EPSILON 1e-10 |
25 | |
26 | static double |
27 | double_normalize (double n) |
28 | { |
29 | if (fabs (x: 1.0 - n) < EPSILON) |
30 | n = 1.0; |
31 | else if (n < EPSILON) |
32 | n = 0.0; |
33 | |
34 | return n; |
35 | } |
36 | |
37 | static void |
38 | spin_xalign_cb (GtkSpinButton *spin, GtkFrame *frame) |
39 | { |
40 | double xalign; |
41 | |
42 | xalign = double_normalize (n: gtk_spin_button_get_value (spin_button: spin)); |
43 | gtk_frame_set_label_align (frame, xalign); |
44 | } |
45 | |
46 | static void |
47 | quit_cb (GtkWidget *widget, |
48 | gpointer data) |
49 | { |
50 | gboolean *done = data; |
51 | |
52 | *done = TRUE; |
53 | |
54 | g_main_context_wakeup (NULL); |
55 | } |
56 | |
57 | int main (int argc, char **argv) |
58 | { |
59 | GtkWidget *window, *widget; |
60 | GtkBox *vbox; |
61 | GtkFrame *frame; |
62 | GtkGrid *grid; |
63 | float xalign; |
64 | gboolean done = FALSE; |
65 | |
66 | gtk_init (); |
67 | |
68 | window = gtk_window_new (); |
69 | gtk_window_set_default_size (GTK_WINDOW (window), width: 300, height: 300); |
70 | |
71 | g_signal_connect (window, "destroy" , G_CALLBACK (quit_cb), &done); |
72 | |
73 | vbox = GTK_BOX (gtk_box_new (GTK_ORIENTATION_VERTICAL, 5)); |
74 | gtk_widget_set_margin_start (GTK_WIDGET (vbox), margin: 12); |
75 | gtk_widget_set_margin_end (GTK_WIDGET (vbox), margin: 12); |
76 | gtk_widget_set_margin_top (GTK_WIDGET (vbox), margin: 12); |
77 | gtk_widget_set_margin_bottom (GTK_WIDGET (vbox), margin: 12); |
78 | gtk_window_set_child (GTK_WINDOW (window), GTK_WIDGET (vbox)); |
79 | |
80 | frame = GTK_FRAME (gtk_frame_new ("Test GtkFrame" )); |
81 | gtk_widget_set_vexpand (GTK_WIDGET (frame), TRUE); |
82 | gtk_box_append (GTK_BOX (vbox), GTK_WIDGET (frame)); |
83 | |
84 | widget = gtk_button_new_with_label (label: "Hello!" ); |
85 | gtk_frame_set_child (GTK_FRAME (frame), child: widget); |
86 | |
87 | grid = GTK_GRID (gtk_grid_new ()); |
88 | gtk_grid_set_row_spacing (grid, spacing: 12); |
89 | gtk_grid_set_column_spacing (grid, spacing: 6); |
90 | gtk_box_append (GTK_BOX (vbox), GTK_WIDGET (grid)); |
91 | |
92 | xalign = gtk_frame_get_label_align (frame); |
93 | |
94 | /* Spin to control :label-xalign */ |
95 | widget = gtk_label_new (str: "label xalign:" ); |
96 | gtk_grid_attach (grid, child: widget, column: 0, row: 0, width: 1, height: 1); |
97 | |
98 | widget = gtk_spin_button_new_with_range (min: 0.0, max: 1.0, step: 0.1); |
99 | gtk_spin_button_set_value (GTK_SPIN_BUTTON (widget), value: xalign); |
100 | g_signal_connect (widget, "value-changed" , G_CALLBACK (spin_xalign_cb), frame); |
101 | gtk_grid_attach (grid, child: widget, column: 1, row: 0, width: 1, height: 1); |
102 | |
103 | gtk_widget_show (widget: window); |
104 | |
105 | while (!done) |
106 | g_main_context_iteration (NULL, TRUE); |
107 | |
108 | return 0; |
109 | } |
110 | |