public TileSelectionDialog()
{
InitializeComponent();
_cboContinent.SelectionChanged += (s, e) => ContinentChanged(this, EventArgs.Empty);
_btnOk.Click += OpenSelectedTile;
_btnCancel.Click += (s, e) => Close();
_blueContainer.SizeChanged += (s, e) => ResetScale();
_tileContainer.MouseWheel += ZoomOneStep;
_tileContainer.MouseLeave += (s, e) => _lblHover.Content = null;
}