Adding event for mac open event

src/app.cpp

@@ -1,3 +1,6 @@
+#include <QDebug>
+#include <QFileOpenEvent>
+
 #include "app.h"
 #include "window.h"
 
@@ -6,3 +9,15 @@ App::App(int argc, char *argv[]) :
 {
     window->show();
 }
+
+bool App::event(QEvent* e)
+{
+    if (e->type() == QEvent::FileOpen)
+    {
+        qDebug() << static_cast<QFileOpenEvent*>(e)->file();
+    }
+    else
+    {
+        return QApplication::event(e);
+    }
+}