private void UpdateParentState(System.Windows.Forms.TreeNode tn)
{
if (tn == null)
{
return;
}
int OrigStateImageIndex = tn.StateImageIndex;
CheckedCounter cnt = new CheckedCounter();
foreach (System.Windows.Forms.TreeNode tnChild in tn.Nodes)
{
cnt = cnt + (tnChild.Tag as CheckedCounter);
}
if (cnt.Checked == cnt.Total)
{
tn.StateImageIndex = (int)CheckedState.Checked;
}
else if (cnt.Checked == 0)
{
tn.StateImageIndex = (int)CheckedState.UnChecked;
}
else
{
tn.StateImageIndex = (int)CheckedState.Mixed;
}
tn.Tag = cnt;
UpdateParentState(tn.Parent);
}
private void UpdateChildState(System.Windows.Forms.TreeNode tn, int value)
{
if (tn.Nodes.Count == 0)
{
tn.StateImageIndex = value;
CheckedCounter cnt = tn.Tag as CheckedCounter;
cnt.Checked = value == (int)CheckedState.Checked ? 1 : 0;
UpdateParentState(tn.Parent);
}
else
{
foreach (System.Windows.Forms.TreeNode tnChild in tn.Nodes)
{
UpdateChildState(tnChild, value);
}
}
}
private CheckedCounter PrepareNodeCounterOne(System.Windows.Forms.TreeNodeCollection nodes)
{
CheckedCounter cnt = new CheckedCounter();
foreach (System.Windows.Forms.TreeNode node in nodes)
{
node.StateImageIndex = (int)CheckedState.UnChecked;
CheckedCounter tmp;
if (node.Nodes.Count == 0)
{
tmp = new CheckedCounter(node.StateImageIndex == (int)CheckedState.Checked ? 1 : 0, 1);
}
else
{
tmp = PrepareNodeCounterOne(node.Nodes);
}
node.Tag = tmp;
cnt = cnt + tmp;
}
return(cnt);
}
