bool?Determine(CheckableSystemObject Root)
{
//Whether or not all children and all children's children have the same value
var Uniform = true;
//If uniform, the value
var Result = default(bool?);
var j = false;
foreach (var i in Root.Children)
{
//Get first child's state
if (j == false)
{
Result = i.IsChecked;
j = true;
}
//If the previous child's state is not equal to the current child's state, it is not uniform and we are done!
else if (Result != i.IsChecked)
{
Uniform = false;
break;
}
}
return(!Uniform ? null : Result);
}
void OnQueryOnExpandedChanged(CheckableSystemObject Item, bool Value)
{
foreach (var i in Item.Children)
{
i.QueryOnExpanded = Value;
OnQueryOnExpandedChanged(i, Value);
}
}
