protected virtual void RemoveFragmentsFromBackStack()
{
FragmentsBackStack.ForEach(x =>
{
UnbindCycle(x.ViewModel);
});
FragmentsBackStack.Clear();
}
protected virtual void RemoveFragmentFromBackStack(string fragmentName)
{
var existCache = FragmentsBackStack.FirstOrDefault(x => x.Key == fragmentName);
if (existCache != null)
{
UnbindCycle(existCache.ViewModel);
FragmentsBackStack.Remove(existCache);
}
}
protected virtual void RemoveFragmentFromBackStack(MvxFragmentPresentationAttribute fragmentAttribute)
{
var fragmentName = FragmentJavaName(fragmentAttribute.ViewType);
var existCache = FragmentsBackStack.FirstOrDefault(x => x.Key == fragmentName);
if (existCache != null)
{
UnbindCycle(existCache.ViewModel);
FragmentsBackStack.Remove(existCache);
}
}
protected override bool TryPerformCloseFragmentTransaction(FragmentManager fragmentManager, MvxFragmentPresentationAttribute fragmentAttribute)
{
var fragmentName = FragmentJavaName(fragmentAttribute.ViewType);
var fragmentTransaction = fragmentManager.BeginTransaction();
fragmentTransaction.DisallowAddToBackStack();
PopFragment(fragmentManager, fragmentTransaction, fragmentAttribute, fragmentName, true);
var newLastCachedFragment = FragmentsBackStack?.LastOrDefault();
if (newLastCachedFragment != null)
{
PushFragment(fragmentManager, fragmentTransaction, null, null, newLastCachedFragment.ViewModel, newLastCachedFragment.Key);
}
fragmentTransaction.CommitNow();
return(true);
}
public virtual void MoveBack()
{
if (CanPop())
{
var cachedFragment = FragmentsBackStack?.LastOrDefault();
if (cachedFragment != null)
{
var fragmentManager = CurrentFragmentManager;
var fragmentTransaction = fragmentManager.BeginTransaction();
fragmentTransaction.DisallowAddToBackStack();
PopFragment(fragmentManager, fragmentTransaction, DeqeueFragmentAttributeIfExist(cachedFragment.Key), cachedFragment.Key, true);
var newLastCachedFragment = FragmentsBackStack?.LastOrDefault();
if (newLastCachedFragment != null)
{
PushFragment(fragmentManager, fragmentTransaction, null, null, newLastCachedFragment.ViewModel, newLastCachedFragment.Key);
}
fragmentTransaction.CommitNow();
}
}
else
{
if ((new Java.Util.Date().Time - LastBackClick.Time) / 1000 < 3)
{
CurrentActivity.FinishAffinity();
Process.KillProcess(Process.MyPid());
}
else
{
LastBackClick = new Java.Util.Date();
(CurrentActivity as ICommonActivity)?.ShowToast("Для выхода из приложения нажмите кнопку повторно");
}
}
}
public virtual T GetAndClear <T>(string viewModelTag = "singleInstanceCache") where T : IMvxViewModel
{
var existCache = FragmentsBackStack.LastOrDefault(x => x.Key == viewModelTag);
return((T)existCache?.ViewModel);
}
public virtual IMvxViewModel GetAndClear(Type viewModelType, string viewModelTag = "singleInstanceCache")
{
var existCache = FragmentsBackStack.LastOrDefault(x => x.Key == viewModelTag);
return(existCache?.ViewModel);
}
protected virtual void PopFragment(FragmentManager fragmentManager, FragmentTransaction fragmentTransaction, MvxFragmentPresentationAttribute fragmentAttribute, string fragmentName, bool removeIsNeeded = false, bool forward = false)
{
fragmentAttribute = fragmentAttribute ?? DeqeueFragmentAttributeIfExist(fragmentName);
if (fragmentAttribute != null)
{
if (!fragmentAttribute.EnterAnimation.Equals(int.MinValue) && !fragmentAttribute.ExitAnimation.Equals(int.MinValue))
{
if (!fragmentAttribute.PopEnterAnimation.Equals(int.MinValue) && !fragmentAttribute.PopExitAnimation.Equals(int.MinValue))
{
fragmentTransaction.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation, fragmentAttribute.PopEnterAnimation, fragmentAttribute.PopExitAnimation);
}
else
{
fragmentTransaction.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation);
}
}
if (fragmentAttribute.TransitionStyle != int.MinValue)
{
fragmentTransaction.SetTransitionStyle(fragmentAttribute.TransitionStyle);
}
}
if ((FragmentsBackStack.LastOrDefault(x => x.Key == fragmentName)?.ViewModel as IBaseViewModel)?.VmNavigationType == NavigationType.PresentModal)
{
lock (this)
{
_presentedModalFragments--;
}
}
var oldFragment = fragmentManager.FindFragmentByTag(fragmentName);
if (oldFragment != null)
{
if (!oldFragment.IsDetached)
{
if (removeIsNeeded)
{
RemoveFragmentFromBackStack(fragmentName);
fragmentTransaction.Remove(oldFragment);
}
else
{
fragmentTransaction.Detach(oldFragment);
}
}
else if (removeIsNeeded)
{
RemoveFragmentFromBackStack(fragmentName);
fragmentTransaction.Remove(oldFragment);
}
if (!forward)
{
OnFragmentPopped(fragmentTransaction, oldFragment, null);
}
}
}
protected virtual void AddFragmentToBackStack(ViewModelBundleCache bundle)
{
FragmentsBackStack.Add(bundle);
}
