Make graphview scrollable

src/main.rs

@@ -32,12 +32,13 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         .expect("Application creation failed");
 
     app.connect_activate(move |app| {
+        let scrollwindow = gtk::ScrolledWindowBuilder::new().child(&*graphview.borrow()).build();
         let window = gtk::ApplicationWindowBuilder::new()
             .application(app)
             .default_width(1280)
             .default_height(720)
             .title("Pipewire Graph Editor")
-            .child(&*graphview.borrow())
+            .child(&scrollwindow)
             .build();
         window
             .get_settings()