private void Viewport_PropertyChanged(object sender, ExtendedPropertyChangedEventArgs e)
{
var transform = plotter.Viewport.Transform;
bool ok = false;
do
{
double width = tileProvider.GetTileWidth(tileProvider.Level);
double height = tileProvider.GetTileHeight(tileProvider.Level);
Rect size = new Rect(new Size(width, height));
Rect onScreen = size.ViewportToScreen(transform);
// todo написать нормально
if (onScreen.Width > tileWidth * 1.45)
{
if (tileProvider.IncreaseLevel())
{
continue;
}
}
else if (onScreen.Width < tileWidth / 1.45)
{
if (tileProvider.DecreaseLevel())
{
continue;
}
}
ok = true;
} while (!ok);
BeginInvalidateVisual();
}
