/usr/share/help/de/gnome-devel-demos/switch.c.page is in gnome-devel-docs 3.28.0-1.
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<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="switch.c" xml:lang="de">
<info>
<title type="text">Switch (C)</title>
<link type="guide" xref="c#buttons"/>
<revision version="0.1" date="2012-06-01" status="draft"/>
<credit type="author copyright">
<name>Monica Kochofar</name>
<email its:translate="no">monicakochofar@gmail.com</email>
<years>2012</years>
</credit>
<desc>A "light switch" style toggle</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Mario Blättermann</mal:name>
<mal:email>mario.blaettermann@gmail.com</mal:email>
<mal:years>2011, 2013</mal:years>
</mal:credit>
</info>
<title>Switch</title>
<media type="image" mime="image/png" style="floatend" src="media/switch_off.png"/>
<media type="image" mime="image/png" src="media/switch_on.png"/>
<p>This switch toggles the title of the window.</p>
<code mime="text/x-csrc" style="numbered">
#include <gtk/gtk.h>
/*Signal handler for the "active" signal of the Switch*/
static void
activate_cb (GObject *switcher,
GParamSpec *pspec,
gpointer user_data)
{
GtkWindow *window = user_data;
if (gtk_switch_get_active (GTK_SWITCH (switcher)))
gtk_window_set_title (GTK_WINDOW (window), "Switch Example");
else
gtk_window_set_title (GTK_WINDOW (window), "");
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *grid;
GtkWidget *window;
GtkWidget *label;
GtkWidget *switcher;
/*Create a window with a set title and default size.
Also, set a border width for the amount of space to leave
inside the window*/
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "Switch Example");
gtk_window_set_default_size (GTK_WINDOW (window), 300, 100);
gtk_container_set_border_width (GTK_CONTAINER (window), 10);
/*Create a label*/
label = gtk_label_new ("Title");
/*Create a switch with a default active state*/
switcher = gtk_switch_new ();
gtk_switch_set_active (GTK_SWITCH (switcher), TRUE);
/*Create a grid and set the column spacing, attach the label and
switch onto the grid and position them accordingly*/
grid = gtk_grid_new();
gtk_grid_set_column_spacing (GTK_GRID (grid), 10);
gtk_grid_attach (GTK_GRID (grid), label, 0, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), switcher, 1, 0, 1, 1);
/*Connecting the clicked signal to the callback function*/
g_signal_connect (GTK_SWITCH (switcher),
"notify::active",
G_CALLBACK (activate_cb),
window);
gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (grid));
gtk_widget_show_all (window);
}
int
main (int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}
</code>
<p>
In this sample we used the following:
</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkApplication.html">GtkApplication</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkWindow.html">GtkWindow</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkLabel.html">GtkLabel</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkSwitch.html">GtkSwitch</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkGrid.html">GtkGrid</link></p></item>
</list>
</page>
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