public void DeleteHandler(GridCommandEventArgs args)
{
BatchEditModel item = (BatchEditModel)args.Item;
DeleteItem(item);
//show notification for undelete
}
public void CreateHandler(GridCommandEventArgs args)
{
BatchEditModel item = (BatchEditModel)args.Item;
item.Id = LocalData.Count + 1;
item.IsNew = true;
LocalData.Insert(0, item);
}
private void ChangeLocalItem(BatchEditModel item)
{
var index = LocalData.ToList().FindIndex(i => i.Id == item.Id);
if (index != -1)
{
LocalData[index] = item;
}
}
public async Task UndeleteItem(BatchEditModel itmToUndelete)
{
BatchEditModel itm = GetItemFromCollection(LocalData, itmToUndelete);
if (itm != null)
{
itm.IsDeleted = false;
}
}
public void EditHandler(GridCommandEventArgs args)
{
BatchEditModel item = (BatchEditModel)args.Item;
//prevent opening for edit for deleted items
if (item.IsDeleted)
{
args.IsCancelled = true;
}
//show notification
}
public void UpdateHandler(GridCommandEventArgs args)
{
BatchEditModel item = (BatchEditModel)args.Item;
BatchEditModel localItem = GetItemFromCollection(LocalData, item);
if (!item.IsDirty)
{
BatchEditModel pristineItm = GetItemFromCollection(PristineItems, item);
if (pristineItm == null)
{
//add only the first time a field is edited, later it is no longer pristine
PristineItems.Add(localItem);
}
}
item.IsChanged = true;
ChangeLocalItem(item);
}
public async Task DeleteItem(BatchEditModel itmToDelete)
{
BatchEditModel localItem = GetItemFromCollection(LocalData, itmToDelete);
if (localItem != null)
{
if (localItem.IsDeleted)
{
return;
}
else if (localItem.IsNew)
{
LocalData.Remove(localItem);
}
else
{
localItem.IsDeleted = true;
}
}
}
public async Task RevertItem(BatchEditModel itmToUndelete)
{
if (itmToUndelete.IsNew)
{
LocalData.Remove(itmToUndelete);
}
if (itmToUndelete.IsDeleted)
{
itmToUndelete.IsDeleted = false;
ChangeLocalItem(itmToUndelete);
}
if (itmToUndelete.IsChanged)
{
BatchEditModel pristineItem = GetItemFromCollection(PristineItems, itmToUndelete);
if (pristineItem != null)
{
itmToUndelete = pristineItem;
ChangeLocalItem(itmToUndelete);
PristineItems.Remove(pristineItem);
}
}
}
private BatchEditModel GetItemFromCollection(IList <BatchEditModel> collection, BatchEditModel itmToFind)
{
var index = collection.ToList().FindIndex(i => i.Id == itmToFind.Id);
if (index != -1)
{
return(collection[index]);
}
return(null);
}