private void PicDesign_MouseDown(object sender, MouseEventArgs e) { if (e.Delta > 0) { } if (e.Button == MouseButtons.Middle) { cameraDrag = Cursor.Position; } else if (e.Button == MouseButtons.Left) { cboObjeto2D.SelectedValue = engine2D.ObterObjeto2DPelaCamera(engine2D.Camera, new Vetor2D(e.X, e.Y)); } }