/// <summary>
/// Allow user to load xml file. User is prompted to save unsaved graph
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void MenuOpen_Click(object sender, RoutedEventArgs e)
{
if (!MainCanvas.IsEmpty())
{
MessageBoxResult result = MessageBox.Show("Would you like to save the current graph before openning a new one?", "Current graph is not saved!",
MessageBoxButton.YesNoCancel, MessageBoxImage.Warning);
if (result == MessageBoxResult.Yes)
{
SaveToFile();
graph.Clear();
MainCanvas.Children.Clear();
OpenFromFile();
}
else if (result == MessageBoxResult.No)
{
OpenFromFile();
}
else if (result == MessageBoxResult.Cancel)
{
// do nothing
}
}
else
{
OpenFromFile();
}
}
