void CustomGridDragAndDrop_Drop(object sender, GridDropEventArgs e)
{
if (TableView != null)
{
DropRow(e);
TableView = null;
e.Handled = true;
}
}
private void GridPackedDragDropManager_OnDrop(object sender, GridDropEventArgs e)
{
e.Handled = true;
var vm = DataContext as IPackingViewModel;
if (vm == null)
{
return;
}
switch (_dragSource)
{
case Packing: if (vm.CanPack())
{
vm.Pack();
}
break;
default: e.Handled = false; break;
}
}
public void DropRow(GridDropEventArgs args)
{
var currentRow = LayoutTreeHelper.GetVisualParents(HitElement).Where(row => row is GroupGridRow || row is RowControl).FirstOrDefault() as FrameworkElement;
var rowData = currentRow.DataContext as RowData;
var tableSource = TableView.Grid.ItemsSource as IList;
var dataView = rowData.View as TableView;
var dataSource = dataView.Grid.ItemsSource as IList;
var rowIndex = dataView.Grid.GetListIndexByRowHandle(args.TargetRowHandle);
var draggingRow = DraggingRows[0];
if (dataSource == null || dataSource[0].GetType() != draggingRow.GetType() || dataSource.Count == 0 || draggingRow == rowData.Row)
{
return;
}
if (Equals(tableSource, dataSource) && tableSource.IndexOf(DraggingRows[0]) <= rowIndex)
{
rowIndex--;
}
tableSource.Remove(DraggingRows[0]);
if (!dataView.Grid.IsGrouped)
{
if (args.DropTargetType == DropTargetType.InsertRowsBefore)
{
dataSource.Insert(rowIndex, draggingRow);
}
else if (args.DropTargetType == DropTargetType.InsertRowsAfter)
{
dataSource.Insert(Math.Min(rowIndex + 1, dataSource.Count), draggingRow);
}
else
{
if (Mouse.GetPosition(currentRow).Y >= currentRow.ActualHeight / 2)
{
dataSource.Insert(Math.Min(rowIndex + 1, dataSource.Count), draggingRow);
}
else
{
dataSource.Insert(rowIndex, draggingRow);
}
}
}
else if (args.DropTargetType == DropTargetType.InsertRowsIntoGroup || dataView.Grid.IsGrouped)
{
var value = dataView.Grid.GetCellValue(rowData.RowHandle.Value, dataView.Grid.SortInfo[0].FieldName);
TypeDescriptor.GetProperties(draggingRow.GetType())[dataView.Grid.SortInfo[0].FieldName].SetValue(draggingRow, value);
if (args.DropTargetType == DropTargetType.InsertRowsAfter)
{
dataSource.Insert(Math.Min(rowIndex + 1, dataSource.Count), draggingRow);
}
else
{
dataSource.Insert(rowIndex, draggingRow);
}
dataView.Grid.RefreshData();
}
}
