diff --git a/wrap/qt/trackball.h b/wrap/qt/trackball.h
new file mode 100644
index 00000000..ed174e6b
--- /dev/null
+++ b/wrap/qt/trackball.h
@@ -0,0 +1,14 @@
+
+Trackball::Button QT2VCG(Qt::MouseButton qtbt,  Qt::KeyboardModifiers modifiers)
+{
+
+	int vcgbt=Trackball::BUTTON_NONE;
+	if(qtbt & Qt::LeftButton		) vcgbt |= Trackball::BUTTON_LEFT;
+	if(qtbt & Qt::RightButton		) vcgbt |= Trackball::BUTTON_RIGHT;
+	if(qtbt & Qt::MidButton			) vcgbt |= Trackball::BUTTON_MIDDLE;
+	if(modifiers & Qt::ShiftModifier   ) vcgbt |= Trackball::KEY_SHIFT;
+	if(modifiers & Qt::ControlModifier ) vcgbt |= Trackball::KEY_CTRL;
+	if(modifiers & Qt::AltModifier     ) vcgbt |= Trackball::KEY_ALT;
+	return Trackball::Button(vcgbt);
+}
+