public override void MouseDown(NSEvent theEvent)
{
// Console.WriteLine("Mouse Down: {0}", theEvent.ClickCount);
CGPoint p = theEvent.LocationInWindow;
mCurrentOval = new Oval();
mCurrentOval.StartPoint = this.ConvertPointFromView(p, null);
mCurrentOval.Endpoint = mCurrentOval.StartPoint;
Ovals.Add(mCurrentOval);
NeedsDisplay = true;
}
public void UndoAdd(NSObject o)
{
Oval oval = ((NSArray)o).GetItem <Oval>(0);
Console.WriteLine("Undoing Add Oval");
// Add the inverse of this operation to the undo stack
NSUndoManager undo = this.UndoManager;
NSArray args = NSArray.FromObjects(new object[] { oval });
undo.RegisterUndoWithTarget(this, new Selector("undoRemove:"), args);
Ovals.Remove(oval);
stretchView.Ovals = Ovals;
stretchView.NeedsDisplay = true;
}
public void UndoRemove(NSObject o)
{
Oval oval = ((NSArray)o).GetItem <Oval>(0);
Console.WriteLine("Undoing Remove oval");
// Undo add
NSUndoManager undo = this.UndoManager;
NSArray args = NSArray.FromObjects(new object[] { oval });
undo.RegisterUndoWithTarget(this, new Selector("undoAdd:"), args);
Ovals.Add(oval);
stretchView.Ovals = Ovals;
stretchView.NeedsDisplay = true;
}
