private void DeleteSectionsFromDataSource()
{
// store intermediary sections and indices to be deleted, than delete
using (var sectionIndicesToBeDeleted = new NSMutableIndexSet())
{
var sectionsToBeDeleted = new List <int>();
foreach (var indexElementPair in GalleryDataSource.ImageCollection.Select((pair, index) =>
new { index, pair }))
{
if (indexElementPair.pair.Value.Count != 0)
{
continue;
}
sectionsToBeDeleted.Add(indexElementPair.index);
sectionIndicesToBeDeleted.Add((nuint)indexElementPair.index);
}
var sortedSectionsToBeDeleted = sectionsToBeDeleted.OrderByDescending(x => x);
foreach (var section in sortedSectionsToBeDeleted)
{
GalleryDataSource.ImageCollection.Remove(GalleryDataSource.ImageCollection.Keys[section]);
}
GalleryCollectionView.DeleteSections(sectionIndicesToBeDeleted);
}
}
private IEnumerable <int> DeleteImagesFromDataSource()
{
//store intermediary images and indices to be deleted, than delete
var imageIndicesToBeDeleted = new List <NSIndexPath>();
var imagesToBeDeleted = new List <(int section, int item)>();
var imageIdsToBeDeleted = new HashSet <int>();
foreach (var indexPath in GalleryDataSource.SelectedImageIndexPaths)
{
imagesToBeDeleted.Add((indexPath.Section, (int)indexPath.Item));
imageIndicesToBeDeleted.Add(indexPath);
imageIdsToBeDeleted.Add(GalleryDataSource.ImageCollection.Values[indexPath.Section]
.Values[(int)indexPath.Item].Id ?? 0);
}
var sortedImagesToBeDeleted = imagesToBeDeleted.OrderByDescending(pair => pair.item);
foreach (var image in sortedImagesToBeDeleted)
{
var row = GalleryDataSource.ImageCollection.Values[image.section];
row.Remove(row.Keys[image.item]);
}
GalleryCollectionView.DeleteItems(imageIndicesToBeDeleted.ToArray());
return(imageIdsToBeDeleted);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
GalleryDataSource.LoadImages();
GalleryCollectionView.RegisterClassForSupplementaryView(typeof(Header),
UICollectionElementKindSection.Header, Constants.GalleryHeaderKey);
GalleryCollectionView.Source = new GalleryCollectionViewSource(this);
var layout = new UICollectionViewFlowLayout
{
SectionInset = new UIEdgeInsets(
Constants.GallerySectionVerticalSpacing,
Constants.GallerySectionSize,
Constants.GallerySectionSize,
Constants.GallerySectionSize),
ItemSize = new CGSize(Constants.GalleryTileWidth, Constants.GalleryTileHeight),
ScrollDirection = UICollectionViewScrollDirection.Vertical,
MinimumLineSpacing = Constants.GalleryLayoutMinLinSpacing,
MinimumInteritemSpacing = Constants.GalleryLayoutMinIterItemSpacing,
HeaderReferenceSize = new CGSize(GalleryCollectionView.Frame.Size.Width, Constants.GalleryHeaderHeight)
};
GalleryCollectionView.SetCollectionViewLayout(layout, true);
GenerateNavBarButtons();
GenerateToolBar();
ResetGalleryTitle();
}
void ReleaseDesignerOutlets()
{
if (AddPictureButton != null)
{
AddPictureButton.Dispose();
AddPictureButton = null;
}
if (AddPostButton != null)
{
AddPostButton.Dispose();
AddPostButton = null;
}
if (CreatePostButton != null)
{
CreatePostButton.Dispose();
CreatePostButton = null;
}
if (DescriptionTextField != null)
{
DescriptionTextField.Dispose();
DescriptionTextField = null;
}
if (FriendsButton != null)
{
FriendsButton.Dispose();
FriendsButton = null;
}
if (GalleryCollectionView != null)
{
GalleryCollectionView.Dispose();
GalleryCollectionView = null;
}
if (HomeButton != null)
{
HomeButton.Dispose();
HomeButton = null;
}
if (PostImageView != null)
{
PostImageView.Dispose();
PostImageView = null;
}
if (ProfileButton != null)
{
ProfileButton.Dispose();
ProfileButton = null;
}
}
private void UncheckSelectedImages(object sender, EventArgs e)
{
foreach (var indexPath in GalleryDataSource.SelectedImageIndexPaths)
{
var galleryImageCell = (GalleryImageCell)GalleryCollectionView.DequeueReusableCell(GalleryImageCell.Key, indexPath);
galleryImageCell.SetGalleryCheckmark();
}
GalleryCollectionView.ReloadData();
ClearSelectedImages();
ResetGalleryTitle();
ToggleToolBarVisibility(false);
}
void ReleaseDesignerOutlets()
{
if (GalleryCollectionView != null)
{
GalleryCollectionView.Dispose();
GalleryCollectionView = null;
}
if (GalleryMainView != null)
{
GalleryMainView.Dispose();
GalleryMainView = null;
}
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
source = new GalleryCollectionViewSource(PostImageView);
source.LoadData(dataContext.GaleryImagePaths);
SetBindings();
SetCommands();
BaseStyling();
EventStyling();
NavigationBar.Set(this, HomeButton, FriendsButton, AddPostButton, ProfileButton);
GalleryCollectionView.RegisterNibForCell(GalleryCollectionViewCell.Nib, GalleryCollectionViewCell.Key);
var layout = new UICollectionViewFlowLayout
{
ItemSize = new CoreGraphics.CGSize(90, 90)
};
GalleryCollectionView.SetCollectionViewLayout(layout, true);
GalleryCollectionView.Source = source;
GalleryCollectionView.ReloadData();
source.OnImageSelect += (o, e) =>
{
if (GalleryCollectionViewSource.SelectedImagePath != null)
{
dataContext.SelectedImagePath = GalleryCollectionViewSource.SelectedImagePath;
GalleryCollectionViewSource.SelectedImagePath = null;
}
};
CreatePostButton.TouchUpInside += (o, e) =>
{
Navigator.Navigate(this, CtrConst.FeedController);
};
}
public override void ViewWillAppear(bool animated)
{
GalleryDataSource.LoadImages();
GalleryCollectionView.ReloadData();
}
