public void Redo()
{
if (redoStack.Count <= 0)
{
return;
}
string model;
if (redoStack.TryPop(out model))
{
string current = TextSerializer.Serialize(this.Elements);
undoStack.Push(current);
Clear();
TextSerializer.Deserialize(model, this.Elements);
UpdateNextId();
RedrawCanvas();
}
}
protected override void OnCreate(Bundle savedInstanceState)
{
//RequestWindowFeature(WindowFeatures.NoTitle);
base.OnCreate(savedInstanceState);
_repository = new Repository(
System.IO.Path.Combine(
System.Environment.GetFolderPath(System.Environment.SpecialFolder.Personal),
"diagrams.db"));
// create drawing canvas
_canvasView = new CanvasView(this);
RegisterForContextMenu(_canvasView);
// get diagram from repository
int diagramId = Intent.GetIntExtra("DiagramId", 0);
if (diagramId > 0)
{
_currentDiagram = _repository.Get(diagramId);
}
else
{
_currentDiagram = new Diagram();
}
// create diagram
TextSerializer.Deserialize(_currentDiagram.Model, _canvasView.Model.Elements);
_canvasView.Model.UpdateNextId();
_canvasView.Model.CurrentModel = TextSerializer.Serialize(_canvasView.Model.Elements);
// set content view to drawing canvas
SetContentView(_canvasView);
//ActivityCompat.InvalidateOptionsMenu (this);
Console.WriteLine("DiagramEditor OnCreate");
}
