public static void RemoveDataGridItems <Item>(System.Windows.Controls.DataGrid dataGrid,
System.Collections.ObjectModel.ObservableCollection <Item> itemsCollection,
ItemInsertEmptyPredicate insertEmptyPredicate,
ItemRemovePredicate <Item> removePredicate,
ItemsRemovedPredicate removedPredicate)
{
if (dataGrid.SelectedItems.Count < 1)
{
return;
}
int[] indexes = new int[dataGrid.SelectedItems.Count];
int i = 0;
foreach (var item in dataGrid.SelectedItems)
{
indexes[i] = dataGrid.Items.IndexOf(item);
++i;
}
Util.SortDsc(indexes);
bool removed = false;
foreach (int index in indexes)
{
if (index + 1 < itemsCollection.Count)
{
Item item = itemsCollection[index];
removePredicate(item);
itemsCollection.RemoveAt(index);
removed = true;
}
}
int selectIndex = -1;
if (indexes.Length > 0)
{
selectIndex = indexes[indexes.Length - 1];
}
if (removed)
{
if (selectIndex >= 0 && selectIndex == itemsCollection.Count - 1)
{
insertEmptyPredicate(selectIndex);
}
removedPredicate();
}
Util.SelectDataGridItem(dataGrid, selectIndex);
}
public static void DataGridItemPropertyChanged <Item>(System.Windows.Controls.DataGrid dataGrid,
System.Collections.ObjectModel.ObservableCollection <Item> items,
Item item,
string propertyName,
ItemUpdatedPredicate updatePredicate,
ItemInsertEmptyPredicate insertEmptyPredicate,
ItemRemovePredicate <Item> removePredicate,
ItemRemovedPredicate removedPredicate)
where Item : VariableItem
{
int index = items.IndexOf(item);
if (index < 0 || index >= dataGrid.Items.Count)
{
return;
}
if (propertyName == "Name")
{
if (item.Name == null || item.Name == "")
{
if (index < dataGrid.Items.Count - 1)
{
removePredicate(item);
items.RemoveAt(index);
removedPredicate(index);
if (index > 0)
{
Util.SelectDataGridItem(dataGrid, index - 1);
}
}
}
else
{
updatePredicate(index);
int next_index = index + 1;
// insert new empty row if needed
if (next_index == items.Count)
{
insertEmptyPredicate(next_index);
}
// select current row, move to next one is automatic
Util.SelectDataGridItem(dataGrid, index);
}
}
else if (propertyName == "IsEnabled")
{
updatePredicate(index);
}
}
