private void RebuildTree()
{
toolTip1.SetToolTip(treePanel, "");
_tree2 = _data2.GetTree();
TreeHelpers <UnionData> .CalculateNodePositions(_tree2);
CalculateControlSize2();
treePanel.Invalidate();
}
public Form1()
{
InitializeComponent();
_data = GetSampleData();
_tree = GetSampleTree(_data);
TreeHelpers <SampleDataModel> .CalculateNodePositions(_tree);
CalculateControlSize();
DoubleBuffered = true;
treePanel.Paint += treePanel_Paint;
}