cek

#include <gtk/gtk.h>

void show(GtkWidget *window, gpointer ptr) {}

void activate(GtkApplication *tmp, gpointer ptr) {

    GtkWidget *scrolled_window;
    GtkWidget *window;
    GtkWidget *button_box;
    GtkWidget *button;
    GtkWidget *box;
    GtkWidget *view;
    GtkTextBuffer *buffer;

    window = gtk_application_window_new(tmp);

    gtk_window_set_title(GTK_WINDOW(window), "tmp");
    gtk_window_set_default_size(GTK_WINDOW(window), 500, 500);
    gtk_window_set_position(GTK_WINDOW(window), GTK_WIN_POS_CENTER);

    scrolled_window = gtk_scrolled_window_new(NULL, NULL);

    buffer = gtk_text_buffer_new(NULL);

    view = gtk_text_view_new_with_buffer(buffer);

    gtk_widget_set_margin_start(view, 10);
    gtk_widget_set_margin_end(view, 10);
    gtk_widget_set_margin_top(view, 10);
    gtk_widget_set_margin_bottom(view, 10);

    gtk_text_view_set_editable(GTK_TEXT_VIEW(view), FALSE);
    gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(view), FALSE);
    gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(view), GTK_WRAP_WORD);

    button = gtk_button_new_with_label("Show");

    button_box = gtk_button_box_new(GTK_ORIENTATION_HORIZONTAL);

    gtk_widget_set_halign(button_box, GTK_ALIGN_END);
    gtk_widget_set_valign(button_box, GTK_ALIGN_END);
    gtk_widget_set_margin_start(button_box, 10);
    gtk_widget_set_margin_end(button_box, 10);
    gtk_widget_set_margin_top(button_box, 0);
    gtk_widget_set_margin_bottom(button_box, 10);

    box = gtk_box_new(GTK_ORIENTATION_VERTICAL, 0);

    gtk_box_pack_start(GTK_BOX(box), scrolled_window, TRUE, TRUE, 0);
    gtk_box_pack_start(GTK_BOX(box), button_box, FALSE, FALSE, 0);

    gtk_container_add(GTK_CONTAINER(scrolled_window), view);
    gtk_container_add(GTK_CONTAINER(button_box), button);
    gtk_container_add(GTK_CONTAINER(window), box);

    g_signal_connect(button, "clicked", G_CALLBACK(show), NULL);

    gtk_widget_show_all(window);
}