/// <summary>
/// Call back for the button click event
/// </summary>
/// <param name="sender">Represents the button clicked</param>
/// <param name="e">Eventargs</param>
private void Button_Click(object sender, EventArgs e)
{
try
{
//Format the input text to change the operators
Query.Text = FormatInput(Query.Text);
//Create an instance of the evaluator class
Evaluator evaluator = new Evaluator(Query.Text);
//Display a heading on each tab
PdnfLabel.Content = PcnfLabel.Content = EvalLabel.Content = TableLabel.Content = PlanLabel.Content = "Query: " + evaluator.Query;
//Update the truth Table, tree view and the plan textbox
TruthTable.ItemsSource = evaluator.EvaluateQuery();
new TreeDiag(evaluator.EvalPlan, TreePlan);
Pcnf.Text = evaluator.FindPCNF();
Pdnf.Text = evaluator.FindPDNF();
Plan.Text = evaluator.GetEvaluationPlan();
}
catch
{
//If, at all anything goes wrong
//The only possible case is when the symbols are unbalanced
//Or, there is no input in the text-box
if (Query.Text.Length == 0) { MessageBox.Show("No Query in the Text Box", "No Query"); }
else { MessageBox.Show("Warning: Unbalanced Symbols found in the Stack", "Error in Query"); }
}
}
/// <summary>
/// Called when we want to compare two strings
/// </summary>
/// <param name="sender">Compare Button</param>
/// <param name="e">Event Args</param>
private void Compare_Click(object sender, EventArgs e)
{
try
{
//Format the input text to change the operators
Query.Text = FormatInput(Query.Text);
CompareQuery.Text = FormatInput(CompareQuery.Text);
//Create an instance of the evaluator class
Evaluator evaluator1 = new Evaluator(Query.Text);
Evaluator evaluator2 = new Evaluator(CompareQuery.Text);
//Evaluate query and find the results
evaluator1.EvaluateQuery();
evaluator2.EvaluateQuery();
//Get the results array
bool[] query1Result = evaluator1.GetResultData();
bool[] query2Result = evaluator2.GetResultData();
//Compare each of the result fields
bool equalFlag = false;
if(query1Result.Length == query2Result.Length)
{
equalFlag = true;
for (int i = 0; i < query1Result.Length; i++) { if (query1Result[i] != query2Result[i]) { equalFlag = false; break; } }
}
//Display a message box according to the result
if (equalFlag == true) { MessageBox.Show("The two expressions are Equivalent", "Equivalent Expressions"); }
else { MessageBox.Show("The two expressions are not Equivalent", "Non - Equivalent Expressions"); }
}
catch
{
//If, at all anything goes wrong
//The only possible case is when the symbols are unbalanced
//Or, there is no input in the text-box
if (Query.Text.Length == 0 || CompareQuery.Text.Length == 0) { MessageBox.Show("No Query in the Text Box", "No Query"); }
else { MessageBox.Show("Warning: Unbalanced Symbols found in the Stack", "Error in Query"); }
}
}