GTK4 Packing buttons

main.c

#include <gtk/gtk.h>


static void
print_hello (GtkWidget *widget, gpointer data)
{
  g_print ("Hello World\n");
}


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

  /* Create a new window, and set its title. */
  window = gtk_application_window_new (app);
  gtk_window_set_title (GTK_WINDOW (window), "Window");

  /* Here we construct the container that is going pack our buttons. */
  grid = gtk_grid_new ();

  /* Pack the container in the window. */
  gtk_window_set_child (GTK_WINDOW (window), grid);

  button = gtk_button_new_with_label ("Button 1");
  g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);

  /* Place the first button in the grid cell (0, 0), and make it fill
   * just 1 cell horizontally and vertically (ie no spanning).
   */
  gtk_grid_attach (GTK_GRID (grid), button, 0, 0, 1, 1);

  button = gtk_button_new_with_label ("Button 2");
  g_signal_connect (button, "clicked", G_CALLBACK (print_hello), NULL);

  /* Place the second button in the grid cell (1, 0), and make it fill
   * just 1 cell horizontally and vertically (ie no spanning).
   */
  gtk_grid_attach (GTK_GRID (grid), button, 1, 0, 1, 1);

  button = gtk_button_new_with_label ("Quit");
  g_signal_connect_swapped (button, "clicked", G_CALLBACK (gtk_window_destroy), window);

  /* Place the Quit button in the grid cell (0, 1), and make it
   * span 2 columns.
   */
  gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 2, 1);

  gtk_widget_show (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;
}

Makefile

CFLAGS = -Wall -g `pkg-config --cflags gtk4`
LDFLAGS = `pkg-config --libs gtk4`

all: main.c
	$(CC) -o main main.c $(CFLAGS) $(LDFLAGS)

clean:
	rm -f *~
	rm -f *.o
	rm -f main