public void Undo()
{
if (_recodes.Count == 0)
{
return;
}
ConstructRecode r = _recodes.Last();
switch (r.type)
{
case RecodeType.CREATE:
foreach (var s in r.targetshapes)
{
_shapes.Remove(s);
}
break;
case RecodeType.DELETE:
foreach (var s in r.targetshapes)
{
AddShape(s);
}
break;
case RecodeType.MOVE:
foreach (Shape s in r.targetshapes)
{
s.Move(r.moveRecode);
}
break;
}
_recodes.RemoveAt(_recodes.Count - 1);
}
private void UpdateDrag()
{
if (_drawState == DrawState.NONE)
{
if (_selectedShapes.Count == 0)
{
return;
}
if (Scene.CurrentScene.IsLeftMouseDown && _selectedShapes.Any(s => s.IsEnoughClose(_pos)))
{
_readyForDrag = true;
}
if (_readyForDrag && Scene.CurrentScene.IsMouseMoved)
{
_readyForDrag = false;
ConstructRecode r = new ConstructRecode(RecodeType.MOVE, _selectedShapes);
_recodes.Add(r);
_lastpos = samplepoint.Coord;
if (Scene.CurrentScene.IsLeftMouseClicking)
{
_isDragging = true;
}
}
if (_isDragging || Scene.CurrentScene.IsLeftMouseClicking && Scene.CurrentScene.IsMouseMoved)
{
var diff = Scene.CurrentScene.MousePosition - Scene.CurrentScene.LastMousePosition;
if (_isDragging || _selectedShapes.Any(s => s.IsEnoughClose(_pos)))
{
if (!_isDragging)
{
_isDragging = true;
}
_selectedShapes.ForEach(s => { s.UnSelect = false; s.Move(diff.ToVector2()); });
samplepoint.Move(diff.ToVector2());
}
if (Scene.CurrentScene.IsLeftMouseUp)
{
_isDragging = false;
_recodes.Last().WriteMoveRecode(samplepoint.Coord - _lastpos);
return;
}
}
}
}