/// <summary>
/// Creates sample data.
/// </summary>
private void CreateInitialData()
{
root_ = new Node_Base("Root");
Node_Base source = new Node_Group("Source")
{
Index = 0
};
for (int i = 0; i < 4; i++)
{
source.Children.Add(new Node_Cell(GetNewCellName()));
}
root_.Children.Add(source);
Node_Base destination = new Node_Group("Destination")
{
Index = 1
};
for (int i = 0; i < 4; i++)
{
destination.Children.Add(new Node_Cell(GetNewCellName()));
}
root_.Children.Add(destination);
root_.UpdateIndexes();
}
private void TreeView_MouseMove(object sender, MouseEventArgs e)
{
if (e.LeftButton != MouseButtonState.Pressed)
{
return;
}
Point currentPosition = e.GetPosition(TheTreeView);
// Note: This should be based on some accessibility number and not just 2 pixels
if ((Math.Abs(currentPosition.X - _lastMouseDown.X) > 5.0) ||
(Math.Abs(currentPosition.Y - _lastMouseDown.Y) > 5.0))
{
Node_Base selectedItem = (Node_Base)TheTreeView.SelectedItem;
sourceNode_ = selectedItem;
Console.WriteLine("TreeView_MouseMove >>> selectedItem = " + selectedItem.Name);
if (selectedItem == null)
{
return;
}
//TreeViewItem container = (TreeViewItem)(TheTreeView.ItemContainerGenerator.ContainerFromIndex(TheTreeView.Items.CurrentPosition));
TreeViewItem container = (TreeViewItem)(TheTreeView.ItemContainerGenerator.ContainerFromItem(sourceNode_));
container = GetTreeViewItem(e.GetPosition(TheTreeView));
if (container == null)
{
return;
}
IsDragInProgress = true;
DragDropEffects finalDropEffect = DragDrop.DoDragDrop(container, selectedItem, DragDropEffects.Move);
IsDragInProgress = false;
// check if we are trying to drop a node onto one of its children
if (selectedItem.ContainsNode(targetNode_))
{
return;
}
if (selectedItem == targetNode_)
{
return;
}
// verificare che il target non sia figlio del selectedItem
if ((finalDropEffect == DragDropEffects.Move) && (targetNode_ != null))
{
#region A Move drop was accepted
selectedItem.Parent.Children.Remove(selectedItem);
switch (targetDropArea_)
{
case Node_Base.enItemDropArea.Top:
targetNode_.Parent.Children.Insert(targetNode_.Index, selectedItem);
break;
case Node_Base.enItemDropArea.Center:
targetNode_.Children.Add(selectedItem);
break;
case Node_Base.enItemDropArea.Bottom:
targetNode_.Parent.Children.Insert(targetNode_.Index + 1, selectedItem);
break;
default:
break;
}
SelectNode(selectedItem);
#endregion
}
root_.UpdateIndexes();
sourceNode_ = null;
targetNode_ = null;
IsDragInProgress = false;
}
}
