gtk4, xfce, linux,c++ - как создать textView со скроллингом?

#include <gtk/gtk.h>
#include <glib.h>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;

  GtkWidget *grid   = gtk_grid_new();
  GtkWidget *button1 = gtk_button_new_with_label ("Reload");
  GtkWidget *label2  = gtk_label_new("test 123");
  GtkWidget *textview = gtk_text_view_new();

gtk_grid_attach(GTK_GRID(grid), button1, 0, 1, 1, 1);
  gtk_grid_attach(GTK_GRID(grid), label2, 2, 2, 1, 1);

  gtk_window_set_child (GTK_WINDOW (win), grid);
  gtk_window_set_child (GTK_WINDOW (win), textview);

#include <gtk/gtk.h>
#include <glib.h>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include <stdlib.h>
using namespace std;
 
string GetStdoutFromCommand(string cmd) {
  string data;
  FILE * stream;
  const int max_buffer = 256;
  char buffer[max_buffer];
  cmd.append(" 2>&1");
 
  stream = popen(cmd.c_str(), "r");
  if (stream) {
    while (!feof(stream))
      if (fgets(buffer, max_buffer, stream) != NULL) data.append(buffer);
    pclose(stream);
  }
  return data;
}
 
static void connect(GApplication *app, gpointer *data) {
    puts("Connect menu item clicked.\n");
}
 
static void click1_cb (GtkWidget *btn, gpointer user_data) {
 
    if (user_data)
        gtk_label_set_text(GTK_LABEL(user_data), GetStdoutFromCommand("netstat -tuwapn").c_str());
}
 
static void activate(GApplication *app, gpointer *data) {
 
    GtkWidget *win = gtk_application_window_new(GTK_APPLICATION(app));
    gtk_window_set_title(GTK_WINDOW(win), "Network connections");
    gtk_window_set_default_size(GTK_WINDOW(win), 700, 700);
 
  GtkWidget *grid   = gtk_grid_new();
  GtkWidget *label2  = gtk_label_new("test software");
GtkTextBuffer *buffer;
GtkWidget *view = gtk_text_view_new ();
 
 
    GSimpleAction *act_connect = g_simple_action_new("Connect", NULL);
    g_action_map_add_action(G_ACTION_MAP(app), G_ACTION(act_connect));
    g_signal_connect(act_connect, "activate", G_CALLBACK(connect), NULL);
 
// Create a new button
  GtkWidget *button1 = gtk_button_new_with_label ("Reload");
  GtkWidget *button2 = gtk_button_new_with_label ("Exit");
 
 
buffer = gtk_text_view_get_buffer (GTK_TEXT_VIEW (view));
//gtk_text_buffer_set_text (buffer, "Hello, this is some text", -1); 
gtk_text_buffer_set_text (buffer,GetStdoutFromCommand("netstat -tuwapn").c_str(), -1); 
 
 
 
  gtk_grid_attach(GTK_GRID(grid), button1, 0, 1, 1, 1);
  gtk_grid_attach(GTK_GRID(grid), button2, 1, 1, 1, 1);
  gtk_grid_attach(GTK_GRID(grid), label2, 2, 10, 50, 400);
  gtk_grid_attach(GTK_GRID(grid), view, 40, 40, 100, 400);
 
  gtk_window_set_child (GTK_WINDOW (win), grid);
 // gtk_window_set_child (GTK_WINDOW (win), view);
 
  // When the button is clicked, close the window passed as an argument
 g_signal_connect (button1, "clicked", G_CALLBACK (click1_cb), label2);
 g_signal_connect_swapped (button2, "clicked", G_CALLBACK (gtk_window_close), win);
 
 gtk_window_present(GTK_WINDOW(win));
}
 
int main(int argc, char **argv) {
    GtkApplication *app;
    int stat;
 
    app = gtk_application_new("com.test", G_APPLICATION_FLAGS_NONE);
    g_signal_connect(app, "activate", G_CALLBACK(activate), NULL);
    stat = g_application_run(G_APPLICATION(app), argc, argv);
    g_object_unref(app);
    return stat;
}

  gtk_grid_attach(GTK_GRID(grid), button1, 0, 1, 1, 1);
  gtk_grid_attach(GTK_GRID(grid), button2, 1, 1, 1, 1);
  gtk_grid_attach(GTK_GRID(grid), label2, 2, 10, 50, 400);
  gtk_grid_attach(GTK_GRID(grid), view, 40, 40, 100, 400);