private void selectedGroups_ItemDrag(object sender, ItemDragEventArgs e)
{
FieldMetaDataTreeNode node = e.Item as FieldMetaDataTreeNode;
if (node != null)
{
selectedGroups.DoDragDrop(new FieldMetaDataDragDropObject(node.Field, selectedGroups), DragDropEffects.Move);
Invalidate();
}
}
private void removeGroup_Click(object sender, EventArgs e)
{
FieldMetaDataTreeNode selectedNode = selectedGroups.SelectedNode as FieldMetaDataTreeNode;
if (selectedNode != null)
{
FieldMetaData field = selectedNode.Field;
_selectedGroupFields.Remove(field);
_availableGroupFields.Add(field);
RebuildSelectedGroupsTree();
selectedGroups.Focus();
}
removeGroup.Enabled = selectedGroups.SelectedNode != null;
}
private void RebuildSelectedGroupsTree()
{
selectedGroups.BeginUpdate();
selectedGroups.Nodes.Clear();
FieldMetaDataTreeNode parentNode = null;
foreach (FieldMetaData fieldMetaData in _selectedGroupFields)
{
if (parentNode == null)
{
parentNode = new FieldMetaDataTreeNode(fieldMetaData);
selectedGroups.Nodes.Add(parentNode);
}
else
{
FieldMetaDataTreeNode child = new FieldMetaDataTreeNode(fieldMetaData);
parentNode.Nodes.Add(child);
parentNode = child;
}
}
selectedGroups.EndUpdate();
selectedGroups.ExpandAll();
}
private void selectedGroups_DragDrop(object sender, DragEventArgs e)
{
if (e.Data.GetDataPresent(FieldMetaDataDragDropObject.Format.Name))
{
FieldMetaDataDragDropObject ddoField =
(FieldMetaDataDragDropObject)e.Data.GetData(FieldMetaDataDragDropObject.Format.Name);
Point localPoint = selectedGroups.PointToClient(new Point(e.X, e.Y));
// Find position of the drop
FieldMetaDataTreeNode parentNode = (FieldMetaDataTreeNode)selectedGroups.GetNodeAt(localPoint);
if (parentNode != null)
{
int parentIndex = _selectedGroupFields.IndexOf(parentNode.Field);
if (ddoField.Source == selectedGroups)
{
//need to remove existing node
_selectedGroupFields.Remove(ddoField.Data);
}
_selectedGroupFields.Insert(parentIndex, ddoField.Data);
}
else // First node or not over a node
{
if (ddoField.Source == selectedGroups)
{
//need to remove existing node
_selectedGroupFields.Remove(ddoField.Data);
}
_selectedGroupFields.Add(ddoField.Data);
}
RebuildSelectedGroupsTree();
// Remove the old field from the list
if (ddoField.Source == availableGroups)
{
_availableGroupFields.Remove(ddoField.Data);
}
}
}
