GtkButton ---GTK+ widgets

GtkButton is a simple widget, that is used to trigger an action.

#include gtk/gtk.h


int main( int argc, char *argv[])
{
GtkWidget *window;
GtkWidget *fixed;
GtkWidget *button;
gtk_init(&argc, &argv);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "GtkButton");
gtk_window_set_default_size(GTK_WINDOW(window), 230, 150);
gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);
fixed = gtk_fixed_new();
gtk_container_add(GTK_CONTAINER(window), fixed);
button = gtk_button_new_with_label("Quit");
gtk_fixed_put(GTK_FIXED(fixed), button, 50, 50);
gtk_widget_set_size_request(button, 80, 35);
g_signal_connect(G_OBJECT(button), "clicked",
G_CALLBACK(gtk_main_quit), G_OBJECT(window));
g_signal_connect_swapped(G_OBJECT(window), "destroy",
G_CALLBACK(gtk_main_quit), NULL);
gtk_widget_show_all(window);
gtk_main();
return 0;
}

The example shows a button that is positioned in a fixed container. The application quits, when we click on the button.

button = gtk_button_new_with_label("Quit");

This code line creates a GtkButton with a label.

g_signal_connect(G_OBJECT(button), "clicked",
G_CALLBACK(gtk_main_quit), G_OBJECT(window));

Here we connect a clicked signal to the button. The signal will launch the gtk_main_quit() function, which terminates the application.



Figure: GtkButton

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