protected void OnReordering(ReorderingEventArgs args)
{
if (this.Reordering != null)
{
this.Reordering(this, args);
}
}
private void OnDropInfo(object sender, DragDropEventArgs e)
{
if (!(e.Options.Source is GridViewRow))
{
return;
}
var gridView = e.Options.Destination as RadGridView;
IEnumerable <object> draggedItems = e.Options.Payload as IEnumerable <object>;
TreeViewDragCue cue = e.Options.DragCue as TreeViewDragCue;
this.HideDropPositionFeedbackPresenter();
if (e.Options.Status == DragStatus.DropPossible)
{
this.UpdateDragCueContent(cue, gridView.Items[gridView.Items.Count - 1], "Move after: ");
cue.IsDropPossible = true;
}
else if (e.Options.Status == DragStatus.DropImpossible)
{
cue.DragActionContent = null;
cue.IsDropPossible = false;
}
else if (e.Options.Status == DragStatus.DropComplete)
{
ReorderingEventArgs reorderingArgs = new ReorderingEventArgs(gridView, draggedItems, gridView.Items.Count);
this.OnReordering(reorderingArgs);
this.TryReorderRows(reorderingArgs);
this.OnReordered(new ReorderedEventArgs(gridView, draggedItems));
}
e.Handled = true;
}
private void TryReorderRows(ReorderingEventArgs args)
{
IList source = args.SourceGrid.ItemsSource as IList;
if (args.Cancel || source == null || source.IsFixedSize)
{
return;
}
var newDropIndex = this.RemoveDraggedItems(source, args.DraggedItems, args.DropIndex);
this.AddDraggedItems(source, args.DraggedItems, newDropIndex);
}
private void OnGridViewRowDropInfo(object sender, DragDropEventArgs e)
{
this.AssociatedObject.ReleaseMouseCapture();
var senderRow = (GridViewRow)sender;
var gridView = senderRow.GridViewDataControl;
IEnumerable <object> draggedItems = e.Options.Payload as IEnumerable <object>;
TreeViewDragCue cue = e.Options.DragCue as TreeViewDragCue;
if (e.Options.Status == DragStatus.DropPossible)
{
var currentRow = this.AssociatedObject.GetContainerFromDataItem((this.currentDropItem)) as GridViewRow;
//if(currentRow == null)
// cancel drag
this.UpdateDragCueContent(cue,
currentDropItem,
String.Format("Move {0}: ", Enum.GetName(typeof(DropPosition), this.currentDropPosition)).ToLower(CultureInfo.InvariantCulture));
this.ShowDropPositionFeedbackPresenter(gridView, currentRow, this.currentDropPosition);
cue.IsDropPossible = true;
}
else if (e.Options.Status == DragStatus.DropImpossible)
{
this.HideDropPositionFeedbackPresenter();
this.ClearDragCueContent(cue);
cue.IsDropPossible = false;
}
else if (e.Options.Status == DragStatus.DropComplete)
{
this.HideDropPositionFeedbackPresenter();
var dropIndex = gridView.Items.IndexOf(this.currentDropItem);
if (currentDropPosition == DropPosition.After)
{
dropIndex++;
}
ReorderingEventArgs reorderingArgs = new ReorderingEventArgs(gridView, draggedItems, dropIndex);
this.OnReordering(reorderingArgs);
this.TryReorderRows(reorderingArgs);
this.OnReordered(new ReorderedEventArgs(gridView, draggedItems));
}
e.Handled = true;
}
