public void setCurrentPane(final Pane pane) {
// ensure no double adds
if (pane == mCurrentPane) return;
// map pane is top-lvl. clear stack.
if (pane == Pane.MAP) {
mBackStack.clear();
}
// don't push current pane to backstack if this method was called via back button
else if (!mBackButtonPressed) mBackStack.push(mCurrentPane);
mBackButtonPressed = false;
mCurrentPane = pane;
mNavigationHelper.switchTo(pane);
}
