private bool NavigateUp(IPreviousNavigator navigator)
{
if (navigator == null)
{
return(false);
}
bool navigated = navigator.Previous();
return(navigated);
}
private bool GoPrevious()
{
Fragment frag = SupportFragmentManager.FindFragmentByTag(MainContentFragmentTag);
IPreviousNavigator navigator = frag as IPreviousNavigator;
if (navigator == null)
{
return(false);
}
return(navigator.Previous());
}
public override bool OnOptionsItemSelected(IMenuItem item)
{
bool showingDetails = !MenuDrawerToggle.DrawerIndicatorEnabled;
if (item.ItemId == Android.Resource.Id.Home && showingDetails)
{
IPreviousNavigator navigator = SupportFragmentManager.FindFragmentByTag(ModuleDetailFragmentTag) as IPreviousNavigator;
if (navigator == null || !navigator.Previous())
{
ShowModuleSelectionScreen();
return(true);
}
}
return(base.OnOptionsItemSelected(item));
}
public override void OnBackPressed()
{
bool showingDetails = !MenuDrawerToggle.DrawerIndicatorEnabled;
if (showingDetails)
{
IPreviousNavigator fragment = SupportFragmentManager.FindFragmentByTag(ModuleDetailFragmentTag) as IPreviousNavigator;
if (NavigateUp(fragment))
{
return;
}
ShowModuleSelectionScreen();
return;
}
base.OnBackPressed();
}
