public async Task ToggleChecked(TItem item)
{
if (IsChecked(item) == true)
{
checkedItems.Remove(item);
CheckAll(ChildSelector(item), false);
}
else
{
checkedItems.Add(item);
CheckAll(ChildSelector(item), true);
}
await CheckedItemsChanged.InvokeAsync(checkedItems);
StateHasChanged();
}
/// <summary>
/// Update the list of selected items based on the list of Checked items in the ListView
/// Maintain this list dynamically because of how filtering has been implemented.
/// </summary>
private void UpdateSelectedItemsList()
{
if (_performingBulkSelection)
{
return;
}
if (CheckedItems == null)
{
CheckedItems = new List <object>();
}
if (ListViewMain.CheckedItems.Count == 0)
{
CheckedItems.Clear();
}
else
{
foreach (ListViewItem listItem in ListViewMain.Items)
{
var item = listItem.Tag;
if (listItem.Checked)
{
// if not already added, add the checked item
if (!CheckedItems.Contains(item))
{
CheckedItems.Add(item);
}
}
else
{
// if already added, then remove it
if (CheckedItems.Contains(item))
{
CheckedItems.Remove(item);
}
}
}
}
CheckedItemsChanged?.Invoke(this, new EventArgs());
}
