public void setTouchMode(int mode) {
        if (mTouchMode != mode) {
            mTouchMode = mode;
            updateTouchAreaSize();
        }
    }
Indicates whether the current layer type is {@link android.view.View#LAYER_TYPE_HARDWARE}.
menudrawer/src/net/simonvt/menudrawer/DraggableDrawer.java