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ClemensFischer
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commit
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152 changed files with 11962 additions and 12115 deletions
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@ -16,226 +16,225 @@ using Avalonia;
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using Avalonia.Media;
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#endif
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namespace MapControl
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namespace MapControl;
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/// <summary>
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/// Displays a Web Mercator tile pyramid.
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/// </summary>
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public partial class MapTileLayer : TilePyramidLayer
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{
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private const int TileSize = 256;
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private static readonly Point MapTopLeft = new Point(-180d * MapProjection.Wgs84MeterPerDegree,
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180d * MapProjection.Wgs84MeterPerDegree);
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public static readonly DependencyProperty TileSourceProperty =
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DependencyPropertyHelper.Register<MapTileLayer, TileSource>(nameof(TileSource), null,
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(layer, oldValue, newValue) => layer.UpdateTileCollection(true));
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public static readonly DependencyProperty MinZoomLevelProperty =
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DependencyPropertyHelper.Register<MapTileLayer, int>(nameof(MinZoomLevel), 0);
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public static readonly DependencyProperty MaxZoomLevelProperty =
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DependencyPropertyHelper.Register<MapTileLayer, int>(nameof(MaxZoomLevel), 19);
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public static readonly DependencyProperty ZoomLevelOffsetProperty =
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DependencyPropertyHelper.Register<MapTileLayer, double>(nameof(ZoomLevelOffset), 0d);
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/// <summary>
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/// Displays a Web Mercator tile pyramid.
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/// A default MapTileLayer using OpenStreetMap data.
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/// </summary>
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public partial class MapTileLayer : TilePyramidLayer
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public static MapTileLayer OpenStreetMapTileLayer => new MapTileLayer
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{
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private const int TileSize = 256;
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TileSource = TileSource.Parse("https://tile.openstreetmap.org/{z}/{x}/{y}.png"),
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SourceName = "OpenStreetMap",
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Description = "© [OpenStreetMap Contributors](http://www.openstreetmap.org/copyright)"
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};
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private static readonly Point MapTopLeft = new Point(-180d * MapProjection.Wgs84MeterPerDegree,
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180d * MapProjection.Wgs84MeterPerDegree);
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public MapTileLayer()
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{
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this.SetRenderTransform(new MatrixTransform());
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}
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public static readonly DependencyProperty TileSourceProperty =
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DependencyPropertyHelper.Register<MapTileLayer, TileSource>(nameof(TileSource), null,
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(layer, oldValue, newValue) => layer.UpdateTileCollection(true));
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public TileMatrix TileMatrix { get; private set; }
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public static readonly DependencyProperty MinZoomLevelProperty =
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DependencyPropertyHelper.Register<MapTileLayer, int>(nameof(MinZoomLevel), 0);
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public ICollection<ImageTile> Tiles { get; private set; } = [];
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public static readonly DependencyProperty MaxZoomLevelProperty =
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DependencyPropertyHelper.Register<MapTileLayer, int>(nameof(MaxZoomLevel), 19);
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/// <summary>
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/// Provides the ImagesSource or image request Uri for map tiles.
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/// </summary>
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public TileSource TileSource
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{
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get => (TileSource)GetValue(TileSourceProperty);
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set => SetValue(TileSourceProperty, value);
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}
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public static readonly DependencyProperty ZoomLevelOffsetProperty =
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DependencyPropertyHelper.Register<MapTileLayer, double>(nameof(ZoomLevelOffset), 0d);
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/// <summary>
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/// Minimum zoom level supported by the MapTileLayer. Default value is 0.
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/// </summary>
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public int MinZoomLevel
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{
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get => (int)GetValue(MinZoomLevelProperty);
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set => SetValue(MinZoomLevelProperty, value);
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}
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/// <summary>
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/// A default MapTileLayer using OpenStreetMap data.
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/// </summary>
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public static MapTileLayer OpenStreetMapTileLayer => new MapTileLayer
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/// <summary>
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/// Maximum zoom level supported by the MapTileLayer. Default value is 19.
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/// </summary>
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public int MaxZoomLevel
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{
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get => (int)GetValue(MaxZoomLevelProperty);
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set => SetValue(MaxZoomLevelProperty, value);
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}
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/// <summary>
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/// Optional offset between the map zoom level and the topmost tile zoom level.
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/// Default value is 0.
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/// </summary>
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public double ZoomLevelOffset
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{
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get => (double)GetValue(ZoomLevelOffsetProperty);
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set => SetValue(ZoomLevelOffsetProperty, value);
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}
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protected override Size MeasureOverride(Size availableSize)
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{
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foreach (var tile in Tiles)
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{
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TileSource = TileSource.Parse("https://tile.openstreetmap.org/{z}/{x}/{y}.png"),
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SourceName = "OpenStreetMap",
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Description = "© [OpenStreetMap Contributors](http://www.openstreetmap.org/copyright)"
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};
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public MapTileLayer()
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{
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this.SetRenderTransform(new MatrixTransform());
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tile.Image.Measure(availableSize);
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}
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public TileMatrix TileMatrix { get; private set; }
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return new Size();
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}
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public ICollection<ImageTile> Tiles { get; private set; } = [];
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/// <summary>
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/// Provides the ImagesSource or image request Uri for map tiles.
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/// </summary>
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public TileSource TileSource
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protected override Size ArrangeOverride(Size finalSize)
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{
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foreach (var tile in Tiles)
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{
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get => (TileSource)GetValue(TileSourceProperty);
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set => SetValue(TileSourceProperty, value);
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}
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/// <summary>
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/// Minimum zoom level supported by the MapTileLayer. Default value is 0.
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/// </summary>
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public int MinZoomLevel
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{
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get => (int)GetValue(MinZoomLevelProperty);
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set => SetValue(MinZoomLevelProperty, value);
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}
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/// <summary>
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/// Maximum zoom level supported by the MapTileLayer. Default value is 19.
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/// </summary>
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public int MaxZoomLevel
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{
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get => (int)GetValue(MaxZoomLevelProperty);
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set => SetValue(MaxZoomLevelProperty, value);
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}
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/// <summary>
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/// Optional offset between the map zoom level and the topmost tile zoom level.
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/// Default value is 0.
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/// </summary>
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public double ZoomLevelOffset
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{
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get => (double)GetValue(ZoomLevelOffsetProperty);
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set => SetValue(ZoomLevelOffsetProperty, value);
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}
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protected override Size MeasureOverride(Size availableSize)
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{
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foreach (var tile in Tiles)
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{
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tile.Image.Measure(availableSize);
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}
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return new Size();
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}
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protected override Size ArrangeOverride(Size finalSize)
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{
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foreach (var tile in Tiles)
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{
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// Arrange tiles relative to TileMatrix.XMin/YMin.
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//
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var tileSize = TileSize << (TileMatrix.ZoomLevel - tile.ZoomLevel);
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var x = tileSize * tile.X - TileSize * TileMatrix.XMin;
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var y = tileSize * tile.Y - TileSize * TileMatrix.YMin;
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tile.Image.Width = tileSize;
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tile.Image.Height = tileSize;
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tile.Image.Arrange(new Rect(x, y, tileSize, tileSize));
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}
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return finalSize;
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}
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protected override void UpdateRenderTransform()
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{
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if (TileMatrix != null)
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{
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// Tile matrix origin in pixels.
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//
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var tileMatrixOrigin = new Point(TileSize * TileMatrix.XMin, TileSize * TileMatrix.YMin);
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var tileMatrixScale = MapBase.ZoomLevelToScale(TileMatrix.ZoomLevel);
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((MatrixTransform)RenderTransform).Matrix =
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ParentMap.ViewTransform.GetTileLayerTransform(tileMatrixScale, MapTopLeft, tileMatrixOrigin);
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}
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}
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protected override void UpdateTileCollection()
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{
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UpdateTileCollection(false);
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}
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private void UpdateTileCollection(bool tileSourceChanged)
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{
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if (TileSource == null || ParentMap?.MapProjection.CrsId != WebMercatorProjection.DefaultCrsId)
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{
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CancelLoadTiles();
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Children.Clear();
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Tiles.Clear();
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TileMatrix = null;
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}
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else if (SetTileMatrix() || tileSourceChanged)
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{
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if (tileSourceChanged)
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{
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Tiles.Clear();
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}
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UpdateRenderTransform();
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UpdateTiles();
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BeginLoadTiles(Tiles, TileSource, SourceName);
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}
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}
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private bool SetTileMatrix()
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{
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// Add 0.001 to avoid floating point precision.
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// Arrange tiles relative to TileMatrix.XMin/YMin.
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//
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var tileMatrixZoomLevel = (int)Math.Floor(ParentMap.ZoomLevel - ZoomLevelOffset + 0.001);
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var tileMatrixScale = MapBase.ZoomLevelToScale(tileMatrixZoomLevel);
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var tileSize = TileSize << (TileMatrix.ZoomLevel - tile.ZoomLevel);
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var x = tileSize * tile.X - TileSize * TileMatrix.XMin;
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var y = tileSize * tile.Y - TileSize * TileMatrix.YMin;
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// Tile matrix bounds in pixels.
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//
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var bounds = ParentMap.ViewTransform.GetTileMatrixBounds(tileMatrixScale, MapTopLeft, ParentMap.ActualWidth, ParentMap.ActualHeight);
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// Tile X and Y bounds.
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//
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var xMin = (int)Math.Floor(bounds.X / TileSize);
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var yMin = (int)Math.Floor(bounds.Y / TileSize);
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var xMax = (int)Math.Floor((bounds.X + bounds.Width) / TileSize);
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var yMax = (int)Math.Floor((bounds.Y + bounds.Height) / TileSize);
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if (TileMatrix != null &&
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TileMatrix.ZoomLevel == tileMatrixZoomLevel &&
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TileMatrix.XMin == xMin && TileMatrix.YMin == yMin &&
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TileMatrix.XMax == xMax && TileMatrix.YMax == yMax)
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{
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return false;
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}
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TileMatrix = new TileMatrix(tileMatrixZoomLevel, xMin, yMin, xMax, yMax);
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return true;
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tile.Image.Width = tileSize;
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tile.Image.Height = tileSize;
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tile.Image.Arrange(new Rect(x, y, tileSize, tileSize));
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}
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private void UpdateTiles()
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return finalSize;
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}
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protected override void UpdateRenderTransform()
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{
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if (TileMatrix != null)
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{
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var tiles = new ImageTileList();
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var maxZoomLevel = Math.Min(TileMatrix.ZoomLevel, MaxZoomLevel);
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// Tile matrix origin in pixels.
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//
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var tileMatrixOrigin = new Point(TileSize * TileMatrix.XMin, TileSize * TileMatrix.YMin);
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var tileMatrixScale = MapBase.ZoomLevelToScale(TileMatrix.ZoomLevel);
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if (maxZoomLevel >= MinZoomLevel)
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{
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var minZoomLevel = maxZoomLevel;
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((MatrixTransform)RenderTransform).Matrix =
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ParentMap.ViewTransform.GetTileLayerTransform(tileMatrixScale, MapTopLeft, tileMatrixOrigin);
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}
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}
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if (IsBaseMapLayer)
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{
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var bgLevels = Math.Max(MaxBackgroundLevels, 0);
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minZoomLevel = Math.Max(TileMatrix.ZoomLevel - bgLevels, MinZoomLevel);
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}
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for (var zoomLevel = minZoomLevel; zoomLevel <= maxZoomLevel; zoomLevel++)
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{
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var tileCount = 1 << zoomLevel; // per row and column
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// Right-shift divides with rounding down also negative values, https://stackoverflow.com/q/55196178
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//
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var shift = TileMatrix.ZoomLevel - zoomLevel;
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var xMin = TileMatrix.XMin >> shift; // may be < 0
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var xMax = TileMatrix.XMax >> shift; // may be >= tileCount
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var yMin = Math.Max(TileMatrix.YMin >> shift, 0);
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var yMax = Math.Min(TileMatrix.YMax >> shift, tileCount - 1);
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tiles.FillMatrix(Tiles, zoomLevel, xMin, yMin, xMax, yMax, tileCount);
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}
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}
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Tiles = tiles;
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protected override void UpdateTileCollection()
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{
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UpdateTileCollection(false);
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}
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private void UpdateTileCollection(bool tileSourceChanged)
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{
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if (TileSource == null || ParentMap?.MapProjection.CrsId != WebMercatorProjection.DefaultCrsId)
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{
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CancelLoadTiles();
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Children.Clear();
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foreach (var tile in tiles)
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Tiles.Clear();
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TileMatrix = null;
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}
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else if (SetTileMatrix() || tileSourceChanged)
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{
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if (tileSourceChanged)
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{
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Children.Add(tile.Image);
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Tiles.Clear();
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}
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UpdateRenderTransform();
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UpdateTiles();
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BeginLoadTiles(Tiles, TileSource, SourceName);
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}
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}
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private bool SetTileMatrix()
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{
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// Add 0.001 to avoid floating point precision.
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//
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var tileMatrixZoomLevel = (int)Math.Floor(ParentMap.ZoomLevel - ZoomLevelOffset + 0.001);
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var tileMatrixScale = MapBase.ZoomLevelToScale(tileMatrixZoomLevel);
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// Tile matrix bounds in pixels.
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//
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var bounds = ParentMap.ViewTransform.GetTileMatrixBounds(tileMatrixScale, MapTopLeft, ParentMap.ActualWidth, ParentMap.ActualHeight);
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// Tile X and Y bounds.
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//
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var xMin = (int)Math.Floor(bounds.X / TileSize);
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var yMin = (int)Math.Floor(bounds.Y / TileSize);
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var xMax = (int)Math.Floor((bounds.X + bounds.Width) / TileSize);
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var yMax = (int)Math.Floor((bounds.Y + bounds.Height) / TileSize);
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if (TileMatrix != null &&
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TileMatrix.ZoomLevel == tileMatrixZoomLevel &&
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TileMatrix.XMin == xMin && TileMatrix.YMin == yMin &&
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TileMatrix.XMax == xMax && TileMatrix.YMax == yMax)
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{
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return false;
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}
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TileMatrix = new TileMatrix(tileMatrixZoomLevel, xMin, yMin, xMax, yMax);
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return true;
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}
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private void UpdateTiles()
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{
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var tiles = new ImageTileList();
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var maxZoomLevel = Math.Min(TileMatrix.ZoomLevel, MaxZoomLevel);
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if (maxZoomLevel >= MinZoomLevel)
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{
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var minZoomLevel = maxZoomLevel;
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if (IsBaseMapLayer)
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{
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var bgLevels = Math.Max(MaxBackgroundLevels, 0);
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minZoomLevel = Math.Max(TileMatrix.ZoomLevel - bgLevels, MinZoomLevel);
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}
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for (var zoomLevel = minZoomLevel; zoomLevel <= maxZoomLevel; zoomLevel++)
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{
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var tileCount = 1 << zoomLevel; // per row and column
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// Right-shift divides with rounding down also negative values, https://stackoverflow.com/q/55196178
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//
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var shift = TileMatrix.ZoomLevel - zoomLevel;
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var xMin = TileMatrix.XMin >> shift; // may be < 0
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var xMax = TileMatrix.XMax >> shift; // may be >= tileCount
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var yMin = Math.Max(TileMatrix.YMin >> shift, 0);
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var yMax = Math.Min(TileMatrix.YMax >> shift, tileCount - 1);
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tiles.FillMatrix(Tiles, zoomLevel, xMin, yMin, xMax, yMax, tileCount);
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}
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}
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Tiles = tiles;
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Children.Clear();
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foreach (var tile in tiles)
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{
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Children.Add(tile.Image);
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}
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}
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}
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