public static void Render(Viewport viewport, Canvas canvas, IEnumerable<Tile<Image>> tiles)
{
if (viewport == null) return;
canvas.Children.Clear();
var tileList = tiles.ToList();
for (int i = 0; i < tileList.Count; i++)
{
var tile = tileList[i];
if (tile.Image == null) continue;
var point1 = viewport.WorldToScreen(tile.Info.Extent.MinX, tile.Info.Extent.MaxY);
var point2 = viewport.WorldToScreen(tile.Info.Extent.MaxX, tile.Info.Extent.MinY);
var dest = new Rect(point1.ToMetroPoint(), point2.ToMetroPoint());
dest = RoundToPixel(dest);
Canvas.SetLeft(tile.Image, dest.X);
Canvas.SetTop(tile.Image, dest.Y);
tile.Image.Width = dest.Width;
tile.Image.Height = dest.Height;
canvas.Children.Add(tile.Image);
if (tile.StartAnimation == default(long))
{
tile.StartAnimation = DateTime.Now.Ticks;
Animate(tile.Image, "Opacity", 0, 1, 600, (s, e) => { });
}
}
}
public static void PositionImage(Image image, Extent extent, Viewport viewport)
{
var min = viewport.WorldToScreen(extent.MinX, extent.MinY);
var max = viewport.WorldToScreen(extent.MaxX, extent.MaxY);
Canvas.SetLeft(image, min.X);
Canvas.SetTop(image, max.Y);
image.Width = max.X - min.X;
image.Height = min.Y - max.Y;
}
public void Render(Viewport viewport, ITileSource tileSource, ITileCache<Tile<Image>> tileCache)
{
_canvas.Children.Clear();
var level = Utilities.GetNearestLevel(tileSource.Schema.Resolutions, viewport.UnitsPerPixel);
var tileInfos = tileSource.Schema.GetTileInfos(viewport.Extent, level);
foreach (var tileInfo in tileInfos)
{
var tile = tileCache.Find(tileInfo.Index);
if (tile != null)
{
_canvas.Children.Add(tile.Image);
PositionImage(tile.Image, tileInfo.Extent, viewport);
}
}
}
void MapControlSizeChanged(object sender, SizeChangedEventArgs e)
{
if (_viewport == null)
{
if (CanInitializeViewport(ActualWidth, ActualHeight))
{
_viewport = InitializeViewport(ActualWidth, ActualHeight, FullMapExtent);
_fetcher.ViewChanged(_viewport.Extent, _viewport.Resolution);
}
}
else
{
_viewport.Width = e.NewSize.Width;
_viewport.Height = e.NewSize.Height;
_fetcher.ViewChanged(_viewport.Extent, _viewport.Resolution);
}
InvalidateArrange();
}
private static bool TryInitializeViewport(ref Viewport viewport, double actualWidth, double actualHeight, ITileSchema schema)
{
if (double.IsNaN(actualWidth)) return false;
if (actualWidth <= 0) return false;
var nearestLevel = Utilities.GetNearestLevel(schema.Resolutions, schema.Extent.Width / actualWidth);
viewport = new Viewport
{
Width = actualWidth,
Height = actualHeight,
Resolution = schema.Resolutions[nearestLevel].UnitsPerPixel,
Center = new Samples.Common.Geometries.Point(schema.Extent.CenterX, schema.Extent.CenterY)
};
return true;
}
