void cbInputSymbol_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
isEditedHandler(sender, e);
pdaRow currentRow = getRowByIndex((int)((StackPanel)((ComboBox)sender).Parent).Tag);
if (currentRow.txtCurrentState.Text == "" ||
currentRow.cbInputSymbol.SelectedIndex == -1 || currentRow.cbStackTop.SelectedIndex == -1)
{
return;
}
foreach (StackPanel sp in ((StackPanel)canvasMain.Children[0]).Children)
{
pdaRow row = getRowByIndex((int)sp.Tag);
if (currentRow == row)
{
continue;
}
if (row.txtCurrentState.Text == "" || row.cbInputSymbol.SelectedIndex == -1 || row.cbStackTop.SelectedIndex == -1)
{
continue;
}
if (currentRow.txtCurrentState.Text == row.txtCurrentState.Text && currentRow.cbInputSymbol.SelectedItem.ToString() == row.cbInputSymbol.SelectedItem.ToString() &&
currentRow.cbStackTop.SelectedItem.ToString() == row.cbStackTop.SelectedItem.ToString())
{
MessageBox.Show("In Dpda, you cannot add more than one transitions on same input symbols");
currentRow.cbInputSymbol.SelectedIndex = -1;
return;
}
}
}
public void deleteSelectedRow()
{
if ((TextBox)selectedRow.sp.Children[(int)rowItems.currentState] == initialState)
{
initialState = null;
}
if ((TextBox)selectedRow.sp.Children[(int)rowItems.NextState] == finalState)
{
finalState = null;
}
StackPanel sp = (StackPanel)canvasMain.Children[0];
int i = sp.Children.IndexOf(selectedRow.sp);
sp.Children.Remove(selectedRow.sp);
this.rows.Remove(selectedRow);
if (i < sp.Children.Count)
{
Label lbl = (Label)((StackPanel)sp.Children[i]).Children[(int)rowItems.lblArrow];
mutexSelectRow(lbl, null);
}
else
{
selectedRow = null;
}
}
public override pdaRow addNewRow()
{
if (canvasMain.Children.Count == 0)
{
StackPanel s = new StackPanel();
s.SetValue(Canvas.LeftProperty, (double)20);
s.SetValue(Canvas.TopProperty, (double)20);
canvasMain.Children.Add(s);
}
StackPanel sp = ((StackPanel)canvasMain.Children[0]);
if (sp.Children.Count == MAX - 1)
{
MessageBox.Show("You can not add more than " + MAX.ToString() + " rows");
return(null);
}
if (sp.ActualHeight > canvasMain.ActualHeight)
{
canvasMain.Height = canvasMain.ActualHeight + 50;
}
pdaRow row = new pdaRow();
row.txtCurrentState.GotFocus += new RoutedEventHandler(txtCurrentState_GotFocus);
row.txtCurrentState.LostFocus += new RoutedEventHandler(txtCurrentState_LostFocus);
row.txtCurrentState.KeyUp += new KeyEventHandler(keyUpEventHandled);
row.txtCurrentState.TextChanged += new TextChangedEventHandler(txtCurrentState_TextChanged);
row.cbInputSymbol.ItemsSource = inputs;
row.cbInputSymbol.SelectionChanged += new SelectionChangedEventHandler(cbInputSymbol_SelectionChanged);
row.cbInputSymbol.KeyUp += new KeyEventHandler(keyUpEventHandled);
row.cbStackTop.ItemsSource = stackSymbols;
row.cbStackTop.SelectionChanged += new SelectionChangedEventHandler(cbStackTop_SelectionChanged);
row.cbStackTop.KeyUp += new KeyEventHandler(keyUpEventHandled);
row.lbl.MouseLeftButtonDown += new MouseButtonEventHandler(mutexSelectRow);
row.lbl.MouseLeftButtonUp += new MouseButtonEventHandler(lbl_MouseLeftButtonUp);//to supress canvas's event only
row.txtNextState.GotFocus += new RoutedEventHandler(txtNextState_GotFocus);
row.txtNextState.LostFocus += new RoutedEventHandler(txtNextState_LostFocus);
row.txtNextState.KeyDown += new KeyEventHandler(tb2_KeyDown);
row.txtNextState.KeyUp += new KeyEventHandler(keyUpEventHandled);
row.txtNextState.TextChanged += new TextChangedEventHandler(txtNextState_TextChanged);
row.cbAction.KeyUp += new KeyEventHandler(keyUpEventHandled);
row.cbAction.SelectionChanged += isEditedHandler;
rows.Add(row);
sp.Children.Add(row.sp);
return(row);
}
public void txtNextState_GotFocus(object sender, RoutedEventArgs e)
{
pdaRow temp = getRowByIndex((int)((StackPanel)((TextBox)sender).Parent).Tag);
if (temp != selectedRow)
{
mutexSelectRow(temp.lbl, null);
}
//else the row is already selected, do not unselect it....
setFinalStateButton.IsEnabled = true;
bool k = setFinalStateButton.IsEnabled;
if (finalState == (TextBox)sender)
{
setFinalStateButton.IsChecked = true;
}
else
{
setFinalStateButton.IsChecked = false;
}
}
public void mutexSelectRow(object sender, MouseButtonEventArgs e)
{
if (e != null) //null when the function is called in the code
{
e.Handled = true; // written here bcoz we have returns before last statement
}
Label lbl = (Label)sender;
if (selectedRow != null) // if a produciton is already selected
{
selectedRow.sp.Background = Brushes.White;
if (selectedRow.sp == (StackPanel)lbl.Parent) // if selected production is clicked again
{
selectedRow = null;
deleteRowButton.IsEnabled = false;
return;
}
}
selectedRow = getRowByIndex((int)((StackPanel)lbl.Parent).Tag);
selectedRow.sp.Background = Brushes.LightBlue;
deleteRowButton.IsEnabled = true;
}
public virtual void loadFromFile(XDocument doc) //override it
{
string[] i = doc.Root.Attribute("inputs").Value.Split(';');
canvasMain.Height = Convert.ToDouble(doc.Root.Attribute("height").Value);
canvasMain.Width = Convert.ToDouble(doc.Root.Attribute("width").Value);
foreach (string s in i)
{
this.inputs.Add(s);
}
this.stackSymbols = this.inputs.ToList();
if (!this.inputs.Contains("^"))
{
this.stackSymbols.Add("^");//stack's last symbol (empty stack)
}
var query = from row in doc.Root.Element("Rows").Elements("Row")
select row;
foreach (XElement s in query)
{
pdaRow r = this.addNewRow();
r.txtCurrentState.Text = s.Attribute("currentState").Value;
if (s.Attribute("isInitial") != null)
{
if (s.Attribute("isInitial").Value == "True")
{
r.txtCurrentState.Background = Brushes.LightGreen;
initialState = r.txtCurrentState;
}
}
if (s.Attribute("inputSymbol") != null)
{
r.cbInputSymbol.SelectedItem = s.Attribute("inputSymbol").Value;
}
if (s.Attribute("stackTopSymbol") != null)
{
r.cbStackTop.SelectedItem = s.Attribute("stackTopSymbol").Value;
}
if (s.Attribute("action") != null)
{
r.cbAction.SelectedItem = s.Attribute("action").Value;
}
r.txtNextState.Text = s.Attribute("nextState").Value;
if (s.Attribute("isFinal") != null)
{
if (s.Attribute("isFinal").Value == "True")
{
r.txtNextState.Background = Brushes.LightPink;
finalState = r.txtNextState;
}
}
}
}
