private void RemoveOperand()
{
if (SelectedFilterConfiguration == null ||
SelectedExpression == null)
{
return;
}
if (SelectedExpression.Parent == null)
{
SelectedFilterConfiguration.Conditions.Root = null;
}
else
{
var parent = SelectedExpression.Parent as BooleanOperatorNode;
if (parent != null)
{
ExpressionTreeElement expression;
if (SelectedExpression.Equals(parent.Right))
{
expression = parent.Left;
}
else
{
expression = parent.Right;
}
if (expression != null)
{
expression.Parent = parent.Parent;
}
var isReplace = SelectedFilterConfiguration.Conditions.FindAndReplace(SelectedExpression.Parent, expression);
if (!isReplace)
{
Trace.WriteLine("Cant replace SelectedExpression.Parent");
}
}
else
{
Trace.WriteLine("SelectedExpression.Parent [is not BooleanOperatorNode] OR [== null]");
}
}
if (SelectedFilterConfiguration.Conditions.Root != null)
{
SelectedFilterConfiguration.Conditions.Root = SelectedFilterConfiguration.Conditions.Root.Clone() as ExpressionTreeNode;
}
SelectedExpression = null;
}
private void AddNode(BooleanOperators type)
{
if (SelectedFilterConfiguration == null ||
SelectedExpression == null)
{
return;
}
if (SelectedExpression is BooleanOperatorNode &&
((BooleanOperatorNode)SelectedExpression).Operator == type)
{
return;
}
ExpressionTreeElement left;
ExpressionTreeElement right;
if (type == BooleanOperators.Not)
{
left = SelectedExpression.Clone() as ExpressionTreeElement;
right = null;
}
else
{
left = null;
right = SelectedExpression.Clone() as ExpressionTreeElement;
}
var newNode = new BooleanOperatorNode(SelectedExpression.Parent,
left,
right,
type);
var replaceResult = SelectedFilterConfiguration.Conditions.FindAndReplace(SelectedExpression, newNode);
if (!replaceResult)
{
Trace.WriteLine("Cant replace SelectedExpression");
}
if (SelectedFilterConfiguration.Conditions.Root != null)
{
SelectedFilterConfiguration.Conditions.Root = SelectedFilterConfiguration.Conditions.Root.Clone() as ExpressionTreeNode;
}
}
