protected virtual FragmentReplaceMode ShouldReplaceCurrentFragment(IMvxCachedFragmentInfo newFragment, IMvxCachedFragmentInfo currentFragment, Bundle replacementBundle)
{
var oldBundle = ((Android.Support.V4.App.Fragment)newFragment.CachedFragment)?.Arguments;
if (oldBundle == null) return FragmentReplaceMode.ReplaceFragment;
var serializer = Mvx.Resolve<IMvxNavigationSerializer>();
var json = oldBundle.GetString(MvxFragmentsPresenter.ViewModelRequestBundleKey);
var oldRequest = serializer.Serializer.DeserializeObject<MvxViewModelRequest>(json);
if (oldRequest == null) return FragmentReplaceMode.ReplaceFragment;
json = replacementBundle.GetString(MvxFragmentsPresenter.ViewModelRequestBundleKey);
var replacementRequest = serializer.Serializer.DeserializeObject<MvxViewModelRequest>(json);
if (replacementRequest == null) return FragmentReplaceMode.ReplaceFragment;
var areParametersEqual = ((oldRequest.ParameterValues == replacementRequest.ParameterValues) ||
(oldRequest.ParameterValues.Count == replacementRequest.ParameterValues.Count &&
!oldRequest.ParameterValues.Except(replacementRequest.ParameterValues).Any()));
if (currentFragment?.Tag != newFragment.Tag)
{
return !areParametersEqual
? FragmentReplaceMode.ReplaceFragmentAndViewModel
: FragmentReplaceMode.ReplaceFragment;
}
else
return !areParametersEqual
? FragmentReplaceMode.ReplaceFragmentAndViewModel
: FragmentReplaceMode.NoReplace;
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo,
FragmentTransaction transaction)
{
transaction.SetCustomAnimations(Resource.Animation.abc_fade_in,
Resource.Animation.abc_fade_out);
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
public override void OnFragmentCreated(IMvxCachedFragmentInfo fragmentInfo, FragmentTransaction transaction)
{
var myCustomInfo = (CustomFragmentInfo)fragmentInfo;
// You can do fragment + transaction based configurations here.
// Note that, the cached fragment might be reused in another transaction afterwards.
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, FragmentTransaction transaction)
{
transaction.SetCustomAnimations(
// Your entrance animation xml reference
Android.Resource.Animation.SlideInLeft,
// Your exit animation xml reference
Android.Resource.Animation.SlideOutRight);
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
public override SerializableMvxCachedFragmentInfo GetSerializableFragmentInfo(
IMvxCachedFragmentInfo objectToSerialize)
{
var baseSerializableCachedFragmentInfo = base.GetSerializableFragmentInfo(objectToSerialize);
var customFragmentInfo = objectToSerialize as MainActivity.CustomFragmentInfo;
return(new SerializableCustomFragmentInfo(baseSerializableCachedFragmentInfo)
{
IsRoot = customFragmentInfo?.IsRoot ?? false
});
}
public override SerializableMvxCachedFragmentInfo GetSerializableFragmentInfo(
IMvxCachedFragmentInfo objectToSerialize)
{
var baseSerializableCachedFragmentInfo = base.GetSerializableFragmentInfo(objectToSerialize);
var customFragmentInfo = objectToSerialize as CustomFragmentInfo;
return new SerializableCustomFragmentInfo(baseSerializableCachedFragmentInfo)
{
IsRoot = customFragmentInfo?.IsRoot ?? false
};
}
public virtual SerializableMvxCachedFragmentInfo GetSerializableFragmentInfo(IMvxCachedFragmentInfo objectToSerialize)
{
return new SerializableMvxCachedFragmentInfo()
{
Tag = objectToSerialize.Tag,
FragmentType = objectToSerialize.FragmentType,
ViewModelType = objectToSerialize.ViewModelType,
ContentId = objectToSerialize.ContentId,
AddToBackStack = objectToSerialize.AddToBackStack
};
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, Android.Support.V4.App.FragmentTransaction transaction)
{
var currentFrag = SupportFragmentManager.FindFragmentById(Resource.Id.content_frame) as MvxFragment;
if (currentFrag != null && fragmentInfo.ViewModelType != typeof(MenuViewModel) &&
currentFrag.FindAssociatedViewModelType() != fragmentInfo.ViewModelType)
{
fragmentInfo.AddToBackStack = true;
}
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
public SerializableMvxCachedFragmentInfo GetSerializableFragmentInfo(IMvxCachedFragmentInfo objectToSerialize)
{
return(new SerializableMvxCachedFragmentInfo()
{
Tag = objectToSerialize.Tag,
FragmentType = objectToSerialize.FragmentType,
ViewModelType = objectToSerialize.ViewModelType,
ContentId = objectToSerialize.ContentId,
AddToBackStack = objectToSerialize.AddToBackStack
});
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, Android.Support.V4.App.FragmentTransaction transaction)
{
if (fragmentInfo.ViewModelType == typeof(AllOffersViewModel) ||
fragmentInfo.ViewModelType == typeof(MyOffersViewModel))
{
transaction.SetCustomAnimations(
Resource.Animation.abc_fade_in,
Resource.Animation.slide_from_center_to_right,
Resource.Animation.abc_fade_in,
Resource.Animation.slide_from_center_to_right);
}
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, Android.Support.V4.App.FragmentTransaction transaction)
{
if (fragmentInfo.ViewModelType == typeof(OffererProfileViewModel))
{
var avatar = FindViewById <CircleImageView>(Resource.Id.profileAvatar);
transaction.AddSharedElement(avatar, "profileAvatar");
}
transaction.SetCustomAnimations(
Resource.Animation.abc_grow_fade_in_from_bottom,
Resource.Animation.abc_shrink_fade_out_from_bottom);
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo,
FragmentTransaction transaction)
{
var currentFrag = SupportFragmentManager.FindFragmentById(Resource.Id.content_frame) as MvxFragment;
if (currentFrag != null &&
currentFrag.FindAssociatedViewModelType(typeof(MainActivity)) != fragmentInfo.ViewModelType)
{
fragmentInfo.AddToBackStack = true;
}
transaction.SetCustomAnimations(Resource.Animation.abc_fade_in,
Resource.Animation.abc_fade_out);
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
protected override FragmentReplaceMode ShouldReplaceCurrentFragment(IMvxCachedFragmentInfo newFragment, IMvxCachedFragmentInfo currentFragment, Bundle replacementBundle)
{
var fragInfo = newFragment as CustomFragmentInfo;
newFragment.ContentId = Resource.Id.content_frame;
var current = SupportFragmentManager.FindFragmentById(Resource.Id.adminid);
var transaction = SupportFragmentManager.BeginTransaction();
newFragment.CachedFragment = Android.Support.V4.App.Fragment.Instantiate(this, FragmentJavaName(newFragment.FragmentType), replacementBundle) as IMvxFragmentView;
var cache = Mvx.GetSingleton <IMvxMultipleViewModelCache> ();
cache.GetAndClear(newFragment.ViewModelType, GetTagFromFragment(newFragment.CachedFragment as Android.Support.V4.App.Fragment));
try {
if (fragInfo.IsRoot)
{
SupportFragmentManager.PopBackStack(null, (int)PopBackStackFlags.Inclusive);
transaction.Replace(newFragment.ContentId, (Android.Support.V4.App.Fragment)newFragment.CachedFragment, newFragment.Tag);
}
else
{
transaction.Replace(newFragment.ContentId, (Android.Support.V4.App.Fragment)newFragment.CachedFragment, newFragment.Tag)
.AddToBackStack(null);
}
//transaction.Add (newFragment.ContentId, (Android.Support.V4.App.Fragment)newFragment.CachedFragment, newFragment.Tag)
// .AddToBackStack (null);
//if (current != null)
// transaction.Hide (current);
transaction.Commit();
Show(fragInfo);
} catch (Exception ex) {
}
return(FragmentReplaceMode.NoReplace);
}
public override void OnBeforeFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, Android.Support.V4.App.FragmentTransaction transaction)
{
if (fragmentInfo.ViewModelType == typeof(SignupViewModel))
{
SupportActionBar.Show();
transaction.SetCustomAnimations(
Resource.Animation.abc_grow_fade_in_from_bottom,
Resource.Animation.abc_shrink_fade_out_from_bottom,
Resource.Animation.abc_grow_fade_in_from_bottom,
Resource.Animation.abc_shrink_fade_out_from_bottom)
.AddToBackStack(null);
}
else
{
SupportActionBar.Hide();
}
base.OnBeforeFragmentChanging(fragmentInfo, transaction);
}
protected virtual void ReplaceFragment(FragmentTransaction ft, IMvxCachedFragmentInfo fragInfo)
{
ft.Replace(fragInfo.ContentId, fragInfo.CachedFragment as Fragment, fragInfo.Tag);
}
protected virtual void ReplaceFragment(FragmentTransaction ft, IMvxCachedFragmentInfo fragInfo)
{
ft.Replace(fragInfo.ContentId, fragInfo.CachedFragment as Android.Support.V4.App.Fragment, fragInfo.Tag);
}
protected virtual FragmentReplaceMode ShouldReplaceCurrentFragment(IMvxCachedFragmentInfo newFragment, IMvxCachedFragmentInfo currentFragment, Bundle replacementBundle)
{
var oldBundle = newFragment.CachedFragment?.Arguments;
if (oldBundle == null) return FragmentReplaceMode.ReplaceFragment;
var serializer = Mvx.Resolve<IMvxNavigationSerializer>();
var json = oldBundle.GetString(MvxFragmentsPresenter.ViewModelRequestBundleKey);
var oldRequest = serializer.Serializer.DeserializeObject<MvxViewModelRequest>(json);
if (oldRequest == null) return FragmentReplaceMode.ReplaceFragment;
json = replacementBundle.GetString(MvxFragmentsPresenter.ViewModelRequestBundleKey);
var replacementRequest = serializer.Serializer.DeserializeObject<MvxViewModelRequest>(json);
if (replacementRequest == null) return FragmentReplaceMode.ReplaceFragment;
var areParametersEqual = ((oldRequest.ParameterValues == replacementRequest.ParameterValues) ||
(oldRequest.ParameterValues.Count == replacementRequest.ParameterValues.Count &&
!oldRequest.ParameterValues.Except(replacementRequest.ParameterValues).Any()));
if (currentFragment?.Tag != newFragment.Tag)
{
return !areParametersEqual
? FragmentReplaceMode.ReplaceFragmentAndViewModel
: FragmentReplaceMode.ReplaceFragment;
}
else
return !areParametersEqual
? FragmentReplaceMode.ReplaceFragmentAndViewModel
: FragmentReplaceMode.NoReplace;
}
protected virtual void ReplaceFragment(FragmentTransaction ft, IMvxCachedFragmentInfo fragInfo)
{
ft.Replace(fragInfo.ContentId, fragInfo.CachedFragment, fragInfo.Tag);
}
public virtual void OnFragmentCreated(IMvxCachedFragmentInfo fragmentInfo, FragmentTransaction transaction)
{
}
// Called before the transaction is commited
public virtual void OnFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, FragmentTransaction transaction)
{
}
public virtual void OnFragmentChanged(IMvxCachedFragmentInfo fragmentInfo)
{
}
public override void OnFragmentChanged(IMvxCachedFragmentInfo fragmentInfo)
{
currentFragmentInfo = fragmentInfo as CustomFragmentInfo;
}
/// <summary>
/// Show Fragment with a specific tag at a specific placeholder
/// </summary>
/// <param name="tag">The tag for the fragment to lookup</param>
/// <param name="contentId">Where you want to show the Fragment</param>
/// <param name="bundle">Bundle which usually contains a Serialized MvxViewModelRequest</param>
/// <param name="forceAddToBackStack">If you want to force add the fragment to the backstack so on backbutton it will go back to it. Note: This will override IMvxCachedFragmentInfo.AddToBackStack configuration.</param>
/// <param name="forceReplaceFragment">If you want the fragment to be re-created</param>
protected virtual void ShowFragment(string tag, int contentId, Bundle bundle, bool forceAddToBackStack = false, bool forceReplaceFragment = false)
{
IMvxCachedFragmentInfo fragInfo;
FragmentCacheConfiguration.TryGetValue(tag, out fragInfo);
IMvxCachedFragmentInfo currentFragInfo = null;
var currentFragment = FragmentManager.FindFragmentById(contentId);
if (currentFragment != null)
{
FragmentCacheConfiguration.TryGetValue(currentFragment.Tag, out currentFragInfo);
}
if (fragInfo == null)
{
throw new MvxException("Could not find tag: {0} in cache, you need to register it first.", tag);
}
// We shouldn't replace the current fragment unless we really need to.
FragmentReplaceMode fragmentReplaceMode = FragmentReplaceMode.ReplaceFragmentAndViewModel;
if (!forceReplaceFragment)
{
fragmentReplaceMode = ShouldReplaceCurrentFragment(fragInfo, currentFragInfo, bundle);
}
if (fragmentReplaceMode == FragmentReplaceMode.NoReplace)
{
return;
}
var ft = FragmentManager.BeginTransaction();
OnBeforeFragmentChanging(fragInfo, ft);
fragInfo.ContentId = contentId;
//If we already have a previously created fragment, we only need to send the new parameters
if (fragInfo.CachedFragment != null && fragmentReplaceMode == FragmentReplaceMode.ReplaceFragment)
{
(fragInfo.CachedFragment as Fragment).Arguments.Clear();
(fragInfo.CachedFragment as Fragment).Arguments.PutAll(bundle);
}
else
{
//Otherwise, create one and cache it
fragInfo.CachedFragment = Fragment.Instantiate(this, FragmentJavaName(fragInfo.FragmentType),
bundle) as IMvxFragmentView;
OnFragmentCreated(fragInfo, ft);
}
currentFragment = fragInfo.CachedFragment as Fragment;
ft.Replace(fragInfo.ContentId, fragInfo.CachedFragment as Fragment, fragInfo.Tag);
//if replacing ViewModel then clear the cache after the fragment
//has been added to the transaction so that the Tag property is not null
//and the UniqueImmutableCacheTag property (if not overridden) has the correct value
if (fragmentReplaceMode == FragmentReplaceMode.ReplaceFragmentAndViewModel)
{
var cache = Mvx.GetSingleton <IMvxMultipleViewModelCache>();
cache.GetAndClear(fragInfo.ViewModelType, GetTagFromFragment(fragInfo.CachedFragment as Fragment));
}
if ((currentFragment != null && fragInfo.AddToBackStack) || forceAddToBackStack)
{
ft.AddToBackStack(fragInfo.Tag);
}
OnFragmentChanging(fragInfo, ft);
ft.Commit();
FragmentManager.ExecutePendingTransactions();
OnFragmentChanged(fragInfo);
}
public virtual void OnFragmentChanged(IMvxCachedFragmentInfo fragmentInfo)
{
}
// Called before the transaction is commited
public virtual void OnFragmentChanging(IMvxCachedFragmentInfo fragmentInfo, FragmentTransaction transaction)
{
}
public bool TryGetValue(string registeredFragmentTag, out IMvxCachedFragmentInfo cachedFragmentInfo)
{
return(_lookup.TryGetValue(registeredFragmentTag, out cachedFragmentInfo));
}
public virtual void OnFragmentCreated(IMvxCachedFragmentInfo fragmentInfo, FragmentTransaction transaction)
{
}
public override void OnFragmentChanged(IMvxCachedFragmentInfo fragmentInfo)
{
var myCustomInfo = fragmentInfo as CustomFragmentInfo;
CheckIfMenuIsNeeded(myCustomInfo);
}
