public void TransformTile(RefreshArguments arguments)
{
foreach (var drawnTile in Sublayers.OfType <DeepZoomTileCAlayer>())
{
drawnTile.Position = new CGPoint(drawnTile.Position.X + arguments.OffsetX,
drawnTile.Position.Y + arguments.OffsetY);
}
}
public void RefreshZoomTileView(RefreshArguments arguments)
{
CGPoint defaultCenter = new CGPoint(Frame.Width * .5f, Frame.Height * .5f);
TileMatrix tileMatrix = new TileMatrix(arguments.TileSize, arguments.TileSize, defaultCenter, arguments.ZoomLevel);
IEnumerable <TileMatrixCell> drawingTiles = tileMatrix.GetTileMatrixCells(currentExtent);
Dictionary <string, DeepZoomTileCAlayer> drawnTiles = new Dictionary <string, DeepZoomTileCAlayer>();
foreach (var currentTile in Sublayers.OfType <DeepZoomTileCAlayer>())
{
string key = string.Format(CultureInfo.InvariantCulture, "{0},{1},{2}", currentTile.ZoomLevel, currentTile.ColumnIndex, currentTile.RowIndex);
drawnTiles[key] = currentTile;
if (currentTile.Frame.X > currentExtent.X + currentExtent.Width ||
currentTile.Frame.Y > currentExtent.Y + currentExtent.Height ||
currentTile.Frame.X + currentTile.Frame.Width < currentExtent.X ||
currentTile.Frame.Y + currentTile.Frame.Height < currentExtent.Y)
{
currentTile.RemoveFromSuperLayer();;
currentTile.Dispose();
}
}
TransformTile(arguments);
foreach (var drawingTile in drawingTiles)
{
string key = string.Format(CultureInfo.InvariantCulture, "{0},{1},{2}", arguments.ZoomLevel, drawingTile.Column, drawingTile.Row);
if (!drawnTiles.ContainsKey(key))
{
DeepZoomTileCAlayer tileView = new DeepZoomTileCAlayer();
tileView.RowIndex = drawingTile.Row;
tileView.ColumnIndex = drawingTile.Column;
tileView.ZoomLevel = arguments.ZoomLevel;
tileView.TileHeight = tileView.TileWidth = arguments.TileSize;
tileView.Frame = drawingTile.CellExtent;
AddSublayer(tileView);
}
}
}
private void TestLayer()
{
var color = Xamarin.Forms.Color.Blue;
ShapeFileLayer subLayer = new ShapeFileLayer();
subLayer.ShapeType = ShapeType.Polyline;
subLayer.Points = new ObservableCollection <Xamarin.Forms.Point>()
{
new Point(67.26238555, -14.31983023),
new Point(67.58549159, -11.84384661),
new Point(66.81337252, -11.66571815),
};
ShapeSetting subLayerSetting = new ShapeSetting();
subLayerSetting.ShapeFill = color.MultiplyAlpha(.3);
subLayerSetting.ShapeStroke = color.MultiplyAlpha(.5);
subLayerSetting.ShapeStrokeThickness = 2;
subLayer.ShapeSettings = subLayerSetting;
Sublayers.Add(subLayer);
}