/// <summary> Event handler for un-checking the visibility toggle button of the layer. Makes the layer invisible. </summary>
/// <param name="sender"> Sender of the Unchecked event. </param>
/// <param name="e"> The event parameters. </param>
private void visibility_Unchecked(object sender, RoutedEventArgs e)
{
if (!(sender is ToggleButton toggleButton))
{
return;
}
toggleButton.Opacity = 0.7;
layers.SetVisible(layers[toggleButton.Tag as string], false);
}