Abstract classes Tile, TileSource

MapControl/Shared/ImageTileList.cs

@@ -0,0 +1,38 @@
+using System.Collections.Generic;
+using System.Linq;
+
+namespace MapControl
+{
+    public partial class ImageTileList : List<ImageTile>
+    {
+        /// <summary>
+        /// Adds existing ImageTile from the source collection or newly created ImageTile to fill the specified tile matrix.
+        /// </summary>
+        public void FillMatrix(ImageTileList source, int zoomLevel, int xMin, int yMin, int xMax, int yMax, int columnCount)
+        {
+            for (var y = yMin; y <= yMax; y++)
+            {
+                for (var x = xMin; x <= xMax; x++)
+                {
+                    var tile = source.FirstOrDefault(t => t.ZoomLevel == zoomLevel && t.X == x && t.Y == y);
+
+                    if (tile == null)
+                    {
+                        tile = new ImageTile(zoomLevel, x, y, columnCount);
+
+                        var equivalentTile = source.FirstOrDefault(
+                            t => t.Image.Source != null && t.ZoomLevel == tile.ZoomLevel && t.Column == tile.Column && t.Row == tile.Row);
+
+                        if (equivalentTile != null)
+                        {
+                            tile.IsPending = false;
+                            tile.Image.Source = equivalentTile.Image.Source; // no opacity animation
+                        }
+                    }
+
+                    Add(tile);
+                }
+            }
+        }
+    }
+}