protected override void OnMouseDown(MouseEventArgs e)
{
this.Focus();
if (e.Button == MouseButtons.Right)
{
Point mousePoint = new Point(e.X, e.Y);
Node clickedNode = CalcHitNode(mousePoint);
if (clickedNode != null)
{
// if multi select the selection is cleard if clicked node is not in selection
if (MultiSelect)
{
if (NodesSelection.Contains(clickedNode) == false)
{
MultiSelectAdd(clickedNode, Control.ModifierKeys);
}
}
FocusedNode = clickedNode;
Invalidate();
}
BeforeShowContextMenu();
}
if (e.Button == MouseButtons.Left)
{
TreeList.HitInfo info = Columns.CalcHitInfo(new Point(e.X, e.Y), HScrollValue());
if ((int)(info.HitType & HitInfo.eHitType.kColumnHeaderResize) > 0)
{
m_resizingColumn = info.Column;
m_resizingColumnScrollOffset = HScrollValue();
return;
}
}
base.OnMouseDown(e);
}
void MultiSelectAdd(Node clickedNode, Keys modifierKeys)
{
if (Control.ModifierKeys == Keys.None)
{
foreach (Node node in NodesSelection)
{
int newrow = NodeCollection.GetVisibleNodeIndex(node);
InvalidateRow(newrow);
}
NodesSelection.Clear();
NodesSelection.Add(clickedNode);
}
if (Control.ModifierKeys == Keys.Shift)
{
if (NodesSelection.Count == 0)
{
NodesSelection.Add(clickedNode);
}
else
{
int startrow = NodeCollection.GetVisibleNodeIndex(NodesSelection[0]);
int currow = NodeCollection.GetVisibleNodeIndex(clickedNode);
if (currow > startrow)
{
Node startingNode = NodesSelection[0];
NodesSelection.Clear();
foreach (Node node in NodeCollection.ForwardNodeIterator(startingNode, clickedNode, true))
{
NodesSelection.Add(node);
}
Invalidate();
}
if (currow < startrow)
{
Node startingNode = NodesSelection[0];
NodesSelection.Clear();
foreach (Node node in NodeCollection.ReverseNodeIterator(startingNode, clickedNode, true))
{
NodesSelection.Add(node);
}
Invalidate();
}
}
}
if (Control.ModifierKeys == Keys.Control)
{
if (NodesSelection.Contains(clickedNode))
{
NodesSelection.Remove(clickedNode);
}
else
{
NodesSelection.Add(clickedNode);
}
}
InvalidateRow(NodeCollection.GetVisibleNodeIndex(clickedNode));
FocusedNode = clickedNode;
}