Question

I want my heading on top and the next button on right bottom. But I am not able to do this. It is displaying next in middle right and heading little above bottom. And with next button I want to move to other window, here I am calling gtk_main_quit(). My code is:

#include <gtk/gtk.h>

int main (int argc, char *argv[])
{

        GtkWidget *window;
        GtkWidget *next;

        GtkWidget *align;
        GtkWidget *label;
        GtkWidget *vbox;
        GtkWidget *hbox;
        GtkWidget *halign;
        GtkWidget *valign;


        gtk_init (&argc, &argv);

        window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
        gtk_window_set_title(GTK_WINDOW(window), "Center");//title position
        gtk_window_set_default_size(GTK_WINDOW(window),600,500);//size
        gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);//position
        vbox = gtk_vbox_new(FALSE, 5);

        valign = gtk_alignment_new(0, 1, 0, 0);
        gtk_container_add(GTK_CONTAINER(vbox), valign);
        gtk_container_add(GTK_CONTAINER(window), vbox);

        hbox = gtk_hbox_new(FALSE, 3);

        next = gtk_button_new_with_label("Next");
        gtk_widget_set_size_request(next, 70, 30);
        gtk_container_add(GTK_CONTAINER(hbox), next);
        halign = gtk_alignment_new(1, 0, 0, 0);
        gtk_container_add(GTK_CONTAINER(halign), hbox);
        align = gtk_alignment_new(0, 0, 1, 0);

        gtk_box_pack_start(GTK_BOX(vbox), halign, FALSE, FALSE, 0);

    g_signal_connect(G_OBJECT(next), "clicked",
                        G_CALLBACK(gtk_main_quit), G_OBJECT(window));
        label = gtk_label_new("No. of projects are:\n");

        gtk_container_add(GTK_CONTAINER(vbox), label);

        gtk_widget_show_all(window);

        g_signal_connect_swapped(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);


        gtk_main ();

        return 0;
}

Answer 1

You add elements to vbox from top to bottom, so if you want the label to appear on top, you should move the lines:

    label = gtk_label_new("No. of projects are:\n");  
    gtk_container_add(GTK_CONTAINER(vbox), label);

so that label is the first object that is added to vbox, right after where you initialize it.
Then the “next” button will also move to the bottom right corner.

There is a chapter in the GTK+ 2.0 Tutorial about this: Packing Widgets.