void SetActivityViewControllerCompletionHandler(UserInfo info)
{
activityViewController.SetCompletionHandler ((activityType, completed, returnedItems, error) => {
CleanupActivity();
RestoreActivityForImageIdentifier(info);
});
}
public void RestoreActivityForImageIdentifier (UserInfo userInfo)
{
if (userInfo == null)
throw new ArgumentNullException ("userInfo");
if (activityViewController != null) {
SetActivityViewControllerCompletionHandler (userInfo);
return;
}
ImageIdentifier = userInfo.ImageId;
image = null; // clear the old image
UpdateImage (false, true); // apply the new image (based on ImageIdentifier) and apply the 2 filter values
// setup our filters (if not already allocated) and assign their values
float blurFilterValue = userInfo.BlurRadius;
var blurFilter = (BlurFilter)CreateImageFilter (BlurFilter.Key);
blurFilter.BlurRadius = blurFilterValue;
// the blur has changed from the activity on the other device
blurFilter.Dirty = blurFilterValue > 0 ? true : blurFilter.Dirty;
var sepiaFilterValue = userInfo.Intensity;
var sepiaFilter = (ModifyFilter)CreateImageFilter (ModifyFilter.Key);
sepiaFilter.Intensity = sepiaFilterValue;
// the sepia has changed from the activity on the other device
sepiaFilter.Dirty = sepiaFilterValue > 0 ? true : sepiaFilter.Dirty;
// providing a different image requires us to adjust our view constraints and zoom
UpdateConstraints ();
UpdateZoom ();
// a different image means updating our current user activity
UpdateActivity ();
// dismiss either filter view controller if necessary
if (currentFilterViewController != null)
currentFilterViewController.DismissViewController (false, null);
else if (activityViewController != null)
activityViewController.DismissViewController (false, null);
}
UserInfo GetFilterValues()
{
var info = new UserInfo ();
// obtain the filter values and save them
ImageFilter filter;
if(filters.TryGetValue (BlurFilter.Key, out filter))
info.BlurRadius = ((BlurFilter)filter).BlurRadius;
if (filters.TryGetValue (ModifyFilter.Key, out filter))
info.Intensity = ((ModifyFilter)filter).Intensity;
return info;
}
public bool HandleUserActivity(NSUserActivity userActivity)
{
var userInfo = new UserInfo (userActivity.UserInfo);
bool rc = HandleActivityUserInfo (userInfo);
ClearActivityContinuationInProgress ();
return rc;
}
bool HandleActivityUserInfo(UserInfo userInfo)
{
string imageIdentifier = userInfo.ImageId;
if (string.IsNullOrEmpty (imageIdentifier)) {
HandleActivityFailure ();
return false;
}
int row = int.Parse (imageIdentifier);
NSIndexPath indexPath = NSIndexPath.FromRowSection (row, 0);
CollectionView.SelectItem (indexPath, false, UICollectionViewScrollPosition.None);
CollectionView.ScrollToItem (indexPath, UICollectionViewScrollPosition.None, false);
if (detailViewController == null)
InstantiateAndPushDetailViewController (true);
DispatchQueue.MainQueue.DispatchAsync (() => {
detailViewController.RestoreActivityForImageIdentifier (userInfo);
SaveActivity ();
});
return true;
}
public override void UpdateUserActivityState(NSUserActivity activity)
{
base.UpdateUserActivityState (activity);
string imageIdentifier = detailViewController.ImageIdentifier;
if (string.IsNullOrEmpty (imageIdentifier))
return;
activity.Title = DataSource.GetTitleForIdentifier (imageIdentifier);
var userInfo = new UserInfo {
ImageId = imageIdentifier
};
activity.AddUserInfoEntries (userInfo.Dictionary);
}
