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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>
static void
spin_ythickness_cb (GtkSpinButton *spin, gpointer user_data)
{
GtkWidget *frame = user_data;
GtkCssProvider *provider;
GtkStyleContext *context;
gchar *data;
GtkBorder pad;
context = gtk_widget_get_style_context (frame);
provider = g_object_get_data (G_OBJECT (frame), "provider");
if (provider == NULL)
{
provider = gtk_css_provider_new ();
g_object_set_data (G_OBJECT (frame), "provider", provider);
gtk_style_context_add_provider (context,
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
gtk_style_context_save (context);
gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
gtk_style_context_get_padding (context, gtk_style_context_get_state (context), &pad);
gtk_style_context_restore (context);
data = g_strdup_printf ("GtkFrame { padding: %dpx %dpx }",
pad.top,
(gint)gtk_spin_button_get_value (spin));
gtk_css_provider_load_from_data (provider, data, -1, NULL);
g_free (data);
gtk_widget_queue_resize (frame);
}
static void
spin_xthickness_cb (GtkSpinButton *spin, gpointer user_data)
{
GtkWidget *frame = user_data;
GtkCssProvider *provider;
GtkStyleContext *context;
gchar *data;
GtkBorder pad;
context = gtk_widget_get_style_context (frame);
provider = g_object_get_data (G_OBJECT (frame), "provider");
if (provider == NULL)
{
provider = gtk_css_provider_new ();
g_object_set_data (G_OBJECT (frame), "provider", provider);
gtk_style_context_add_provider (context,
GTK_STYLE_PROVIDER (provider),
GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
}
gtk_style_context_save (context);
gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
gtk_style_context_get_padding (context, gtk_style_context_get_state (context), &pad);
gtk_style_context_restore (context);
data = g_strdup_printf ("GtkFrame { padding: %dpx %dpx }",
(gint)gtk_spin_button_get_value (spin),
pad.left);
gtk_css_provider_load_from_data (provider, data, -1, NULL);
g_free (data);
gtk_widget_queue_resize (frame);
}
/* Function to normalize rounding errors in FP arithmetic to
our desired limits */
#define EPSILON 1e-10
static gdouble
double_normalize (gdouble 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)
{
gdouble xalign;
gfloat yalign;
xalign = double_normalize (gtk_spin_button_get_value (spin));
gtk_frame_get_label_align (frame, NULL, &yalign);
gtk_frame_set_label_align (frame, xalign, yalign);
}
static void
spin_yalign_cb (GtkSpinButton *spin, GtkFrame *frame)
{
gdouble yalign;
gfloat xalign;
yalign = double_normalize (gtk_spin_button_get_value (spin));
gtk_frame_get_label_align (frame, &xalign, NULL);
gtk_frame_set_label_align (frame, xalign, yalign);
}
int main (int argc, char **argv)
{
GtkStyleContext *context;
GtkBorder pad;
GtkWidget *window, *frame, *xthickness_spin, *ythickness_spin, *vbox;
GtkWidget *xalign_spin, *yalign_spin, *button, *grid, *label;
gfloat xalign, yalign;
gtk_init (&argc, &argv);
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
gtk_container_set_border_width (GTK_CONTAINER (window), 5);
gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
g_signal_connect (G_OBJECT (window), "delete-event", gtk_main_quit, NULL);
vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 5);
gtk_container_add (GTK_CONTAINER (window), vbox);
frame = gtk_frame_new ("Testing");
gtk_box_pack_start (GTK_BOX (vbox), frame, TRUE, TRUE, 0);
button = gtk_button_new_with_label ("Hello!");
gtk_container_add (GTK_CONTAINER (frame), button);
grid = gtk_grid_new ();
gtk_box_pack_start (GTK_BOX (vbox), grid, FALSE, FALSE, 0);
context = gtk_widget_get_style_context (frame);
gtk_style_context_save (context);
gtk_style_context_set_state (context, GTK_STATE_FLAG_NORMAL);
gtk_style_context_get_padding (context, gtk_style_context_get_state (context), &pad);
gtk_style_context_restore (context);
/* Spin to control xthickness */
label = gtk_label_new ("xthickness: ");
gtk_grid_attach (GTK_GRID (grid), label, 0, 0, 1, 1);
xthickness_spin = gtk_spin_button_new_with_range (0, 250, 1);
g_signal_connect (G_OBJECT (xthickness_spin), "value-changed", G_CALLBACK (spin_xthickness_cb), frame);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (xthickness_spin), pad.left);
gtk_grid_attach (GTK_GRID (grid), xthickness_spin, 1, 0, 1, 1);
/* Spin to control ythickness */
label = gtk_label_new ("ythickness: ");
gtk_grid_attach (GTK_GRID (grid), label, 0, 1, 1, 1);
ythickness_spin = gtk_spin_button_new_with_range (0, 250, 1);
g_signal_connect (G_OBJECT (ythickness_spin), "value-changed", G_CALLBACK (spin_ythickness_cb), frame);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (ythickness_spin), pad.top);
gtk_grid_attach (GTK_GRID (grid), ythickness_spin, 1, 1, 1, 1);
gtk_frame_get_label_align (GTK_FRAME (frame), &xalign, &yalign);
/* Spin to control label xalign */
label = gtk_label_new ("xalign: ");
gtk_grid_attach (GTK_GRID (grid), label, 0, 2, 1, 1);
xalign_spin = gtk_spin_button_new_with_range (0.0, 1.0, 0.1);
g_signal_connect (G_OBJECT (xalign_spin), "value-changed", G_CALLBACK (spin_xalign_cb), frame);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (xalign_spin), xalign);
gtk_grid_attach (GTK_GRID (grid), xalign_spin, 1, 2, 1, 1);
/* Spin to control label yalign */
label = gtk_label_new ("yalign: ");
gtk_grid_attach (GTK_GRID (grid), label, 0, 3, 1, 1);
yalign_spin = gtk_spin_button_new_with_range (0.0, 1.0, 0.1);
g_signal_connect (G_OBJECT (yalign_spin), "value-changed", G_CALLBACK (spin_yalign_cb), frame);
gtk_spin_button_set_value (GTK_SPIN_BUTTON (yalign_spin), yalign);
gtk_grid_attach (GTK_GRID (grid), yalign_spin, 1, 3, 1, 1);
gtk_widget_show_all (window);
gtk_main ();
return 0;
}
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