def onClickTarget(self, sender, event):
# Check to see if content was already set
if sender.Content == None:
# Insert an Ellipse in the target label
grid = Grid()
ellipse = Shapes.Ellipse()
ellipse.Style = Application.Current.Windows[0].Resources["TargetStyle"]
grid.Children.Add(ellipse)
sender.Content = grid
text = TextBlock()
text.Style = Application.Current.Windows[0].Resources["TextBlockStyle"]
text.Text = str(len(self.path)+1)
grid.Children.Add(text)
ellipse.Visibility = Visibility.Visible
# Update moveMatrix position
rowCol = sender.Name.split("and")
lastRowCol = [int(rowCol[1]), int(rowCol[2])]
self.path.append([lastRowCol[0], lastRowCol[1]])
