private void DoRemove( NodeAndSubRect nodeAndSubRect )
{
CountAndSubRect countAndSubRect;
if( _nodeCounts.TryGetValue( nodeAndSubRect.TreeNode, out countAndSubRect ) )
{
--countAndSubRect.Count;
if( countAndSubRect.Count <= 0 )
{
_nodeCounts.Remove( nodeAndSubRect.TreeNode );
}
}
UpdateTimer();
}
private void DoAdd( NodeAndSubRect nodeAndSubRect )
{
CountAndSubRect countAndSubRect;
if( !_nodeCounts.TryGetValue( nodeAndSubRect.TreeNode, out countAndSubRect ) )
{
countAndSubRect = new CountAndSubRect();
countAndSubRect.SubRect = nodeAndSubRect.SubRect;
_nodeCounts[nodeAndSubRect.TreeNode] = countAndSubRect;
}
++countAndSubRect.Count;
countAndSubRect.SubRect = Rectangle.Union( countAndSubRect.SubRect, nodeAndSubRect.SubRect );
UpdateTimer();
}