protected virtual void ShowDialogFragment(
Type view,
MvxDialogFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
var fragmentName = FragmentJavaName(attribute.ViewType);
IMvxFragmentView mvxFragmentView = CreateFragment(attribute, fragmentName);
var dialog = (DialogFragment)mvxFragmentView;
// MvxNavigationService provides an already instantiated ViewModel here,
// therefore just assign it
if (request is MvxViewModelInstanceRequest instanceRequest)
{
mvxFragmentView.ViewModel = instanceRequest.ViewModelInstance;
}
else
{
mvxFragmentView.LoadViewModelFrom(request, null);
}
dialog.Cancelable = attribute.Cancelable;
Dialogs.Add(mvxFragmentView.ViewModel, dialog);
var ft = CurrentFragmentManager.BeginTransaction();
OnBeforeFragmentChanging(ft, attribute);
if (attribute.AddToBackStack == true)
{
ft.AddToBackStack(fragmentName);
}
dialog.Show(ft, fragmentName);
}
private void InvokeFragmentTransaction(FragmentInfo fragmentInfo)
{
if (fragmentInfo.FragmentInstance == _currentFragment)
{
return;
}
var fragmentTransaction = CurrentFragmentManager.BeginTransaction();
var fragment = fragmentInfo.FragmentInstance;
fragment.ViewModel = fragmentInfo.ViewModelInstance;
if (CurrentFragmentManager.FindFragmentByTag(fragmentInfo.JavaFragmentName) != null)
{
fragmentTransaction.Show(CurrentFragmentManager.FindFragmentByTag(
fragmentInfo.JavaFragmentName));
}
else
{
fragmentTransaction.Add(fragmentInfo.FragmentContentId,
(Fragment)fragment, fragmentInfo.JavaFragmentName);
}
fragmentTransaction.Commit();
fragmentTransaction = CurrentFragmentManager.BeginTransaction();
if (_currentFragment != null)
{
fragmentTransaction.Hide(_currentFragment);
}
fragmentTransaction.Commit();
_currentFragment = (Fragment)fragment;
fragmentInfo.ViewModelInstance.ViewAppearing();
}
public override void Show(MvxViewModelRequest request)
{
if (request.PresentationValues?["NavigationCommand"] == "StackClear")
{
CurrentFragmentManager.PopBackStack();
}
base.Show(request);
}
protected virtual void ShowDialogFragment(
Type view,
MvxDialogFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
var fragmentName = FragmentJavaName(attribute.ViewType);
var dialog = (DialogFragment)CreateFragment(attribute, fragmentName);
var mvxFragmentView = (IMvxFragmentView)dialog;
// MvxNavigationService provides an already instantiated ViewModel here,
// therefore just assign it
if (request is MvxViewModelInstanceRequest instanceRequest)
{
mvxFragmentView.ViewModel = instanceRequest.ViewModelInstance;
}
else
{
mvxFragmentView.LoadViewModelFrom(request, null);
}
dialog.Cancelable = attribute.Cancelable;
Dialogs.Add(mvxFragmentView.ViewModel, dialog);
var ft = CurrentFragmentManager.BeginTransaction();
if (attribute.SharedElements != null)
{
foreach (var item in attribute.SharedElements)
{
ft.AddSharedElement(item.Value, item.Key);
}
}
if (!attribute.EnterAnimation.Equals(int.MinValue) && !attribute.ExitAnimation.Equals(int.MinValue))
{
if (!attribute.PopEnterAnimation.Equals(int.MinValue) && !attribute.PopExitAnimation.Equals(int.MinValue))
{
ft.SetCustomAnimations(attribute.EnterAnimation, attribute.ExitAnimation, attribute.PopEnterAnimation, attribute.PopExitAnimation);
}
else
{
ft.SetCustomAnimations(attribute.EnterAnimation, attribute.ExitAnimation);
}
}
if (attribute.TransitionStyle != int.MinValue)
{
ft.SetTransitionStyle(attribute.TransitionStyle);
}
if (attribute.AddToBackStack == true)
{
ft.AddToBackStack(fragmentName);
}
dialog.Show(ft, fragmentName);
}
protected virtual bool TryPerformCloseFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute fragmentAttribute)
{
try
{
var fragmentName = fragmentAttribute.ViewType.FragmentJavaName();
if (fragmentManager.BackStackEntryCount > 0)
{
var popBackStackFragmentName = fragmentAttribute.PopBackStackImmediateName?.Trim() == ""
? fragmentName
: fragmentAttribute.PopBackStackImmediateName;
fragmentManager.PopBackStackImmediate(popBackStackFragmentName, fragmentAttribute.PopBackStackImmediateFlag.ToNativePopBackStackFlags());
OnFragmentPopped(null, null, fragmentAttribute);
return(true);
}
else if (CurrentFragmentManager.FindFragmentByTag(fragmentName) != null)
{
var ft = fragmentManager.BeginTransaction();
var fragment = fragmentManager.FindFragmentByTag(fragmentName);
if (!fragmentAttribute.EnterAnimation.Equals(int.MinValue) && !fragmentAttribute.ExitAnimation.Equals(int.MinValue))
{
if (!fragmentAttribute.PopEnterAnimation.Equals(int.MinValue) && !fragmentAttribute.PopExitAnimation.Equals(int.MinValue))
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation, fragmentAttribute.PopEnterAnimation, fragmentAttribute.PopExitAnimation);
}
else
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation);
}
}
if (fragmentAttribute.TransitionStyle != int.MinValue)
{
ft.SetTransitionStyle(fragmentAttribute.TransitionStyle);
}
ft.Remove(fragment);
ft.CommitAllowingStateLoss();
OnFragmentPopped(ft, fragment, fragmentAttribute);
return(true);
}
}
catch (System.Exception ex)
{
MvxLog.Instance.Error("Cannot close fragment transaction", ex);
return(false);
}
return(false);
}
protected virtual ValueTask<bool> CloseFragmentDialog(IMvxViewModel viewModel, MvxDialogFragmentPresentationAttribute? attribute)
{
string? tag = attribute?.ViewType?.FragmentJavaName();
var toClose = CurrentFragmentManager.FindFragmentByTag(tag);
if (toClose != null && toClose is DialogFragment dialog)
{
dialog.DismissAllowingStateLoss();
return new ValueTask<bool>(true);
}
return new ValueTask<bool>(false);
}
protected virtual bool CloseFragments()
{
try
{
CurrentFragmentManager.PopBackStackImmediate();
}
catch (System.Exception ex)
{
MvxLog.Instance.Trace("Cannot close any fragments", ex);
}
return(true);
}
public override void Show(MvxViewModelRequest request)
{
if (request.PresentationValues?[Constants.NavigationCommandKey] == Constants.NavigationCommandClearStackValue)
{
for (int i = 0; i < CurrentFragmentManager.BackStackEntryCount; i++)
{
CurrentFragmentManager.PopBackStack(null, FragmentManager.PopBackStackInclusive);
}
}
base.Show(request);
}
protected virtual Task <bool> CloseFragmentDialog(IMvxViewModel viewModel, MvxDialogFragmentPresentationAttribute attribute)
{
string tag = FragmentJavaName(attribute.ViewType);
var toClose = CurrentFragmentManager.FindFragmentByTag(tag);
if (toClose != null && toClose is DialogFragment dialog)
{
dialog.DismissAllowingStateLoss();
return(Task.FromResult(true));
}
return(Task.FromResult(false));
}
protected virtual Fragment GetFragmentByViewType(Type type)
{
var fragmentName = type.FragmentJavaName();
var fragment = CurrentFragmentManager?.FindFragmentByTag(fragmentName);
if (fragment != null)
{
return(fragment);
}
return(FindFragmentInChildren(fragmentName, CurrentFragmentManager));
}
protected override bool CloseFragmentDialog(IMvxViewModel viewModel, MvxDialogFragmentPresentationAttribute attribute)
{
var tag = FragmentJavaName(attribute.ViewType);
var toClose = CurrentFragmentManager?.FindFragmentByTag(tag);
if (toClose is DialogFragment dialog)
{
dialog.DismissAllowingStateLoss();
return(true);
}
return(false);
}
// protected abstract int ActivityLayout { get; }
/// <summary>
///
/// </summary>
/// <param name="bundle"></param>
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
SetContentView(View);
Injector.BuildUp();
CurrentFragmentManager.ClearBackStack();
ConfigureExitDialog();
SetupToolBar(Toolbar);
NavigationView?.OnNavigationItemSelected()
.Subscribe(e => OnNavigationItemSelected(e.EventArgs))
.ToBeDisposedBy(this);
DrawerSetup(Drawer);
}
protected virtual bool TryPerformCloseFragmentTransaction(
FragmentManager fragmentManager,
MvxFragmentPresentationAttribute fragmentAttribute)
{
var fragmentName = fragmentAttribute.ViewType.FragmentJavaName();
if (fragmentManager.BackStackEntryCount > 0)
{
fragmentManager.PopBackStackImmediate(fragmentName, PopBackStackFlags.Inclusive);
OnFragmentPopped(null, null, fragmentAttribute);
return(true);
}
else if (CurrentFragmentManager.FindFragmentByTag(fragmentName) != null)
{
var ft = fragmentManager.BeginTransaction();
var fragment = fragmentManager.FindFragmentByTag(fragmentName);
if (!fragmentAttribute.EnterAnimation.Equals(int.MinValue) && !fragmentAttribute.ExitAnimation.Equals(int.MinValue))
{
if (!fragmentAttribute.PopEnterAnimation.Equals(int.MinValue) && !fragmentAttribute.PopExitAnimation.Equals(int.MinValue))
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation, fragmentAttribute.PopEnterAnimation, fragmentAttribute.PopExitAnimation);
}
else
{
ft.SetCustomAnimations(fragmentAttribute.EnterAnimation, fragmentAttribute.ExitAnimation);
}
}
if (fragmentAttribute.TransitionStyle != int.MinValue)
{
ft.SetTransitionStyle(fragmentAttribute.TransitionStyle);
}
ft.Remove(fragment);
ft.CommitAllowingStateLoss();
OnFragmentPopped(ft, fragment, fragmentAttribute);
return(true);
}
return(false);
}
public override Task <bool> ChangePresentation(MvxPresentationHint hint)
{
if (hint is MvxPagePresentationHint pagePresentationHint)
{
var request = new MvxViewModelRequest(pagePresentationHint.ViewModel);
var attribute = GetPresentationAttribute(request);
if (attribute is MvxBottomNavigationViewPresentationAttribute bottomNavigationAttribute)
{
MvxBottomNavigationView bottomNavigationView = FindMvxBottomNavigationViewInFragmentPresentation(bottomNavigationAttribute);
if (bottomNavigationView != null)
{
var menuItem = bottomNavigationView.FindItemByViewModel(pagePresentationHint.ViewModel);
if (menuItem == null)
{
//MvvmCross.MvxAndroidLog.Instance.Trace("Did not find a menu item which corresponds to {0}, skipping presentation change...", pagePresentationHint.ViewModel);
return(Task.FromResult(false));
}
// If we are deeper in our back stack, we want to make sure that we remove the stack
if (CurrentFragmentManager.BackStackEntryCount > 0)
{
var name = CurrentFragmentManager.GetBackStackEntryAt(0).Name;
CurrentFragmentManager.PopBackStackImmediate(name, 1);
}
PerformShowFragmentTransaction(CurrentFragmentManager, bottomNavigationAttribute, new MvxViewModelRequest(pagePresentationHint.ViewModel));
var item = bottomNavigationView.FindItemByViewModel(pagePresentationHint.ViewModel);
item.SetChecked(true);
return(Task.FromResult(true));
}
}
}
return(base.ChangePresentation(hint));
}
protected virtual Task <bool> ShowDialogFragment(
Type view,
MvxDialogFragmentPresentationAttribute attribute,
MvxViewModelRequest request)
{
var fragmentName = attribute.ViewType.FragmentJavaName();
IMvxFragmentView mvxFragmentView = CreateFragment(CurrentActivity.SupportFragmentManager, attribute, attribute.ViewType);
var dialog = (DialogFragment)mvxFragmentView;
// MvxNavigationService provides an already instantiated ViewModel here,
// therefore just assign it
if (request is MvxViewModelInstanceRequest instanceRequest)
{
mvxFragmentView.ViewModel = instanceRequest.ViewModelInstance;
}
else
{
mvxFragmentView.LoadViewModelFrom(request, null);
}
dialog.Cancelable = attribute.Cancelable;
var ft = CurrentFragmentManager.BeginTransaction();
OnBeforeFragmentChanging(ft, dialog, attribute, request);
if (attribute.AddToBackStack)
{
ft.AddToBackStack(fragmentName);
}
OnFragmentChanging(ft, dialog, attribute, request);
dialog.Show(ft, fragmentName);
OnFragmentChanged(ft, dialog, attribute, request);
return(Task.FromResult(true));
}
protected virtual Fragment GetFragmentByViewType(Type type)
{
var fragmentName = FragmentJavaName(type);
return(CurrentFragmentManager.FindFragmentByTag(fragmentName));
}
protected virtual bool IsDeadLocked(IDialog dialog)
{
return(CurrentFragmentManager.IsBackStackEmpty(0) &&
dialog == null ||
dialog.IsDeadLocked());
}
