# Switch (C)

Monica Kochofar
monicakochofar@gmail.com 2012
A "light switch" style toggle
Rafael Fontenelle
rafaelff@gnome.org 2013, 2018

# Switch

This switch toggles the title of the window.

#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; }

In this sample we used the following:

GtkApplication

GtkWindow

GtkLabel

GtkSwitch

GtkGrid