gtk test

#include <gtk/gtk.h>

gint count = 0;
char buf[5];

void increase(GtkWidget *widget, gpointer label){
  count++;

  sprintf(buf, "%d", count);
  gtk_label_set_text(GTK_LABEL(label), buf);
}

void resetfn(GtkWidget *widget, gpointer label){
    count=0;

    sprintf(buf,"%d",count);
    gtk_label_set_text(GTK_LABEL(label),buf);
}

void decrease(GtkWidget *widget, gpointer label){
  count--;

  sprintf(buf, "%d", count);
  gtk_label_set_text(GTK_LABEL(label), buf);
}

/* Another callback */
void destroy( GtkWidget *widget, gpointer data ){
    gtk_main_quit ();
}

int main( int argc,char *argv[] ){
    GtkWidget *window;
    GtkWidget *frame;
    GtkWidget *plus;
    GtkWidget *minus;
    GtkWidget *reset;
    GtkWidget *label;

    gtk_init(&argc, &argv);

    window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(window),"Hi world");
    gtk_window_set_position(GTK_WINDOW(window),GTK_WIN_POS_CENTER);
    gtk_window_set_default_size(GTK_WINDOW(window),500,450);
    gtk_window_set_resizable(GTK_WINDOW(window),TRUE);
    // gtk_window_maximize(GTK_WINDOW(window));

    GError *error = NULL;
    gtk_window_set_icon(GTK_WINDOW(window), gdk_pixbuf_new_from_file("icon.png", &error));

    frame = gtk_fixed_new();
    gtk_container_add(GTK_CONTAINER(window), frame);

    plus = gtk_button_new_with_label("+");
    gtk_widget_set_size_request(plus, 80, 35);
    gtk_fixed_put(GTK_FIXED(frame), plus, 50, 20);

    minus = gtk_button_new_with_label("-");
    gtk_widget_set_size_request(minus, 80, 35);
    gtk_fixed_put(GTK_FIXED(frame), minus, 50, 80);

    reset = gtk_button_new_with_label("RESET");
    gtk_widget_set_size_request(reset,80,35);
    gtk_fixed_put(GTK_FIXED(frame),reset,50,140);

    label = gtk_label_new("0");
    gtk_fixed_put(GTK_FIXED(frame), label, 190, 58);

    g_signal_connect(window, "destroy",G_CALLBACK (gtk_main_quit), NULL);

    g_signal_connect(plus, "clicked",G_CALLBACK(increase), label);

    g_signal_connect(minus, "clicked",G_CALLBACK(decrease), label);

    g_signal_connect(reset,"clicked",G_CALLBACK(resetfn),label);

    gtk_widget_show_all(window);


    gtk_main();
    return 0;
}