# RadioButton (C)

Monica Kochofar
monicakochofar@gmail.com 2012
A choice from multiple checkbuttons
Fran Dieguez
frandieguez@gnome.org 2012-2013.

# RadioButton

These radiobuttons report their activity in the terminal.

#include <gtk/gtk.h>

/*Signal handler for the "toggled" signal of the RadioButton*/ static void button_toggled_cb (GtkWidget *button, gpointer user_data) { char *b_state; const char *button_label;

if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON (button))) b_state = "on"; else { b_state = "off"; g_print ("\n"); }

button_label = gtk_button_get_label (GTK_BUTTON (button));

g_print ("%s was turned %s\n", button_label, b_state); }

static void activate (GtkApplication *app, gpointer user_data) { GtkWidget *grid; GtkWidget *window;

GtkWidget *button1; GtkWidget *button2; GtkWidget *button3;

/*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), "RadioButton Example"); gtk_window_set_default_size (GTK_WINDOW (window), 250, 100); gtk_container_set_border_width (GTK_CONTAINER(window), 20);

/*Create an initial radio button*/ button1 = gtk_radio_button_new_with_label (NULL, "Button 1");

/*Create a second radio button, and add it to the same group as Button 1*/ button2 = gtk_radio_button_new_with_label_from_widget (GTK_RADIO_BUTTON (button1), "Button 2");

/*Create a third button, and add it to the same group as Button 1*/ button3 = gtk_radio_button_new_with_label_from_widget (GTK_RADIO_BUTTON (button1), "Button 3");

/*Create a grid, attach the buttons, and position them accordingly*/ grid = gtk_grid_new (); gtk_grid_attach (GTK_GRID (grid), button1, 0, 0, 1, 1); gtk_grid_attach (GTK_GRID (grid), button2, 0, 1, 1, 1); gtk_grid_attach (GTK_GRID (grid), button3, 0, 2, 1, 1);

/*Be sure to set the initial state of each button*/ gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button2), TRUE); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button1), FALSE); gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button3), FALSE);

/*Connect the signal handlers (aka Callback functions) to the buttons*/ g_signal_connect (GTK_TOGGLE_BUTTON (button1), "toggled", G_CALLBACK (button_toggled_cb), window); g_signal_connect (GTK_TOGGLE_BUTTON (button2), "toggled", G_CALLBACK (button_toggled_cb), window); g_signal_connect (GTK_TOGGLE_BUTTON (button3), "toggled", G_CALLBACK (button_toggled_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; }

Neste exemplo empregaremos o seguinte:

GtkApplication

GtkWindow

GtkLabel

GtkGrid

GtkSwitch