private void ReorderItems(object parameter)
{
ItemReorderCompleteContext context = parameter as ItemReorderCompleteContext;
int sourceIndex = this.selectedList.Items.IndexOf(context.Item as ListItem);
int targetIndex = this.selectedList.Items.IndexOf(context.DestinationItem as ListItem);
var movedItem = context.Item as ListItem;
this.selectedList.Items.RemoveAt(sourceIndex);
this.selectedList.Items.Insert(targetIndex, movedItem);
}
void IDragDropElement.OnDragDropComplete(DragCompleteContext context)
{
var data = context.PayloadData as ReorderItemsDragOperation;
if (data != null)
{
this.FinalizeReorder(context);
var isExecuted = false;
RadListViewItem destinationItem = null;
ItemReorderPlacement placement = 0;
if (data.InitialSourceIndex < data.CurrentSourceReorderIndex)
{
destinationItem = this.reorderCoordinator.Host.ElementAt(data.CurrentSourceReorderIndex - 1) as RadListViewItem;
placement = ItemReorderPlacement.After;
if (destinationItem == null)
{
destinationItem = this.reorderCoordinator.Host.ElementAt(data.CurrentSourceReorderIndex + 1) as RadListViewItem;
placement = ItemReorderPlacement.Before;
}
}
else if (data.InitialSourceIndex > data.CurrentSourceReorderIndex)
{
destinationItem = this.reorderCoordinator.Host.ElementAt(data.CurrentSourceReorderIndex + 1) as RadListViewItem;
placement = ItemReorderPlacement.Before;
if (destinationItem == null)
{
destinationItem = this.reorderCoordinator.Host.ElementAt(data.CurrentSourceReorderIndex - 1) as RadListViewItem;
placement = ItemReorderPlacement.After;
}
}
if (destinationItem != null)
{
var dataItem = data.Data;
var destinationDataItem = destinationItem.DataContext;
IDataGroup dataGroup = null;
IDataGroup destinationDataGroup = null;
if (this.listView.GroupDescriptors.Count > 0)
{
dataGroup = this.listView.Model.FindItemParentGroup(dataItem);
destinationDataGroup = this.listView.Model.FindItemParentGroup(destinationDataItem);
}
var commandContext = new ItemReorderCompleteContext(dataItem, dataGroup, destinationDataItem, destinationDataGroup, placement);
isExecuted = this.ListView.commandService.ExecuteCommand(CommandId.ItemReorderComplete, commandContext);
}
if (isExecuted)
{
// TODO: Data provider does not handle well reordering of items in groups.
// Remove this workaround once we fix the reordering in the data provider.
if (this.listView.GroupDescriptors.Count > 0)
{
this.listView.updateService.RegisterUpdate((int)UpdateFlags.AffectsData);
}
}
else
{
this.reorderCoordinator.CancelReorderOperation(this, data.InitialSourceIndex);
}
}
else
{
if (context.DragSuccessful)
{
double offset = 0;
var dragMode = DragDrop.GetDragPositionMode(this);
if (this.ListView.Orientation == Orientation.Horizontal)
{
switch (dragMode)
{
case DragPositionMode.RailXForward:
offset = Math.Max(0, this.dragY);
break;
case DragPositionMode.RailXBackwards:
offset = Math.Min(0, this.dragY);
break;
case DragPositionMode.RailX:
offset = this.dragY;
break;
default:
break;
}
}
else
{
switch (dragMode)
{
case DragPositionMode.RailXForward:
offset = Math.Max(0, this.dragX);
break;
case DragPositionMode.RailXBackwards:
offset = Math.Min(0, this.dragX);
break;
case DragPositionMode.RailX:
offset = this.dragX;
break;
default:
break;
}
}
var swipeContext = new ItemSwipeActionCompleteContext(this.DataContext, this, offset);
bool isExecuted = this.ListView.commandService.ExecuteCommand(CommandId.ItemSwipeActionComplete, swipeContext);
if (isExecuted)
{
this.UpdateActionContentClipping(swipeContext.FinalDragOffset);
this.isDraggedForAction = true;
this.ListView.swipedItem = this;
}
else
{
this.ClearActionContent();
}
}
else
{
this.ClearActionContent();
this.ListView.CleanupSwipedItem();
}
}
this.Opacity = 1;
DragDrop.SetDragPositionMode(this, DragPositionMode.Free);
this.ListView.InvalidatePanelArrange();
}
