使用Vala/GTK+ 3进行跨应用程序拖放

using Gtk;

public class DragAndDropWindow : Window {
    private Label label;

    public DragAndDropWindow () {
        title = "Drag and Drop Example";
        default_width = 400;
        default_height = 200;

        label = new Label ("Drag something here");
        label.drag_dest_set (DestDefaults.ALL, [], Gdk.DragAction.COPY);
        label.drag_data_get.connect (on_drag_data_get);
        label.drag_data_received.connect (on_drag_data_received);

        add (label);
    }

    private void on_drag_data_get (Widget widget, Gdk.DragContext drag_context, int x, int y, Data data, uint info, uint time) {
        // Handle drag data get event
    }

    private void on_drag_data_received (Widget widget, Gdk.DragContext drag_context, int x, int y, Data data, uint info, uint time) {
        string text = data.get_text ();
        label.text = "Dropped text: " + text;
        drag_context.finish (true, false, time);
    }
}

int main (string[] args) {
    Gtk.init (ref args);

    DragAndDropWindow window = new DragAndDropWindow ();
    window.destroy.connect (Gtk.main_quit);
    window.show_all ();

    Gtk.main ();
    return 0;
}