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);
}
}
private void PinchGestureRecognizerHandler(UIPinchGestureRecognizer gestureRecognizer)
{
Stopwatch sw = Stopwatch.StartNew();
RefreshArguments arguments = CollectArguments(gestureRecognizer);
if (middlePoint.Equals(CGPoint.Empty))
{
if (gestureRecognizer.NumberOfTouches <= 1)
{
return;
}
CGPoint point1 = gestureRecognizer.LocationOfTouch(0, containerView);
CGPoint point2 = gestureRecognizer.LocationOfTouch(1, containerView);
nfloat x = point1.X - point2.X;
nfloat y = point1.Y - point2.Y;
middlePoint = new CGPoint(point1.X + x, point1.Y + y);
}
if (tileSize == 0)
{
zoomLevel = arguments.ZoomLevel;
tileSize = arguments.TileSize;
extentWidth = containerView.CurrentExtent.Width;
extentHeight = containerView.CurrentExtent.Height;
}
arguments.Scale = gestureRecognizer.Scale;
arguments.ZoomLevel = zoomLevel * gestureRecognizer.Scale;
arguments.TileSize = (int)(tileSize * gestureRecognizer.Scale);
txtZoomLevel.Text = arguments.ZoomLevel.ToString();
txtTileSize.Text = arguments.TileSize.ToString();
nfloat newLeft = middlePoint.X - gestureRecognizer.Scale * middlePoint.X;
nfloat newTop = middlePoint.Y - gestureRecognizer.Scale * middlePoint.Y;
nfloat newWidth = extentWidth * gestureRecognizer.Scale;
nfloat newHeight = extentHeight * gestureRecognizer.Scale;
containerView.CurrentExtent = new CGRect(newLeft, newTop, newWidth, newHeight);
containerView.RefreshZoomTileView(arguments);
if (gestureRecognizer.State == UIGestureRecognizerState.Ended)
{
middlePoint = CGPoint.Empty;
zoomLevel = 0.0f;
tileSize = 0;
extentWidth = 0.0f;
extentHeight = 0.0f;
}
sw.Stop();
GestureTimeMonitorAction(sw.ElapsedMilliseconds);
}
private void TransformTile(RefreshArguments arguments)
{
foreach (var drawnTile in Subviews.OfType <DeepZoomTileView>())
{
if (arguments.Scale == 0.0f)
{
drawnTile.Center = new CGPoint(drawnTile.Center.X + arguments.OffsetX, drawnTile.Center.Y + arguments.OffsetY);
}
else
{
nfloat left = (nfloat)Math.Ceiling((drawnTile.Frame.X - currentExtent.X));
nfloat top = (nfloat)Math.Ceiling((drawnTile.Frame.Y - currentExtent.Y));
nfloat width = drawnTile.TileWidth;
nfloat height = drawnTile.TileHeight;
drawnTile.Frame = new CGRect(left, top, width, height);
}
}
}
private RefreshArguments CollectArguments(UIGestureRecognizer e)
{
RefreshArguments arguments = new RefreshArguments();
arguments.ZoomLevel = double.Parse(txtZoomLevel.Text);
arguments.TileSize = int.Parse(txtTileSize.Text);
CGPoint location = e.LocationInView(containerView);
if (startPoint.Equals(CGPoint.Empty))
{
startPoint = location;
}
arguments.OffsetX = location.X - startPoint.X;
arguments.OffsetY = location.Y - startPoint.Y;
startPoint = location;
return(arguments);
}
private void PanGestureRecognizerHandler(UIPanGestureRecognizer gestureRecognizer)
{
Stopwatch sw = Stopwatch.StartNew();
RefreshArguments arguments = CollectArguments(gestureRecognizer);
nfloat x = containerView.CurrentExtent.X - arguments.OffsetX;
nfloat y = containerView.CurrentExtent.Y - arguments.OffsetY;
containerView.CurrentExtent = new CGRect(new CGPoint(x, y), containerView.CurrentExtent.Size);
containerView.RefreshZoomTileView(arguments);
if (gestureRecognizer.State == UIGestureRecognizerState.Ended)
{
startPoint = CGPoint.Empty;
}
sw.Stop();
GestureTimeMonitorAction(sw.ElapsedMilliseconds);
}
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 RefreshTileView()
{
Stopwatch sw = Stopwatch.StartNew();
RefreshArguments arguments = new RefreshArguments();
arguments.ZoomLevel = double.Parse(txtZoomLevel.Text);
arguments.TileSize = int.Parse(txtTileSize.Text);
containerView.CurrentExtent = new CGRect(0, 0, View.Frame.Width, View.Frame.Height);
foreach (var tileView in containerView.Subviews.OfType <DeepZoomTileView>())
{
tileView.RemoveFromSuperview();
tileView.Dispose();
}
for (int i = 0; i < 10; i++)
{
containerView.RefreshZoomTileView(arguments);
}
sw.Stop();
lblRedrawResult.Text = string.Format("Redraw: {0} ms", sw.ElapsedMilliseconds / 10);
}
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, DeepZoomTileView> drawnTiles = new Dictionary <string, DeepZoomTileView>();
foreach (var currentTile in Subviews.OfType <DeepZoomTileView>())
{
string key = string.Format(CultureInfo.InvariantCulture, "{0},{1},{2}", currentTile.ZoomLevel, currentTile.ColumnIndex, currentTile.RowIndex);
if (currentTile.Frame.X > currentExtent.Width ||
currentTile.Frame.Y > currentExtent.Height ||
currentTile.Frame.X + currentTile.Frame.Width < 0 ||
currentTile.Frame.Y + currentTile.Frame.Height < 0 ||
currentTile.ZoomLevel != arguments.ZoomLevel)
{
currentTile.RemoveFromSuperview();
currentTile.Dispose();
//if (tileViewCaches.Count >= 100)
//{
// string lastKey = tileViewCaches.Last().Key;
// tileViewCaches[lastKey].RemoveFromSuperview();
// tileViewCaches[lastKey].Dispose();
// tileViewCaches.Remove(lastKey);
//}
//if (!tileViewCaches.ContainsKey(key))
//{
// currentTile.Hidden = true;
// tileViewCaches.Add(key, currentTile);
//}
}
else
{
drawnTiles[key] = currentTile;
}
}
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))
{
if (tileViewCaches.ContainsKey(key))
{
tileViewCaches[key].Hidden = false;
tileViewCaches.Remove(key);
}
else
{
DeepZoomTileView tileView = new DeepZoomTileView();
tileView.RowIndex = drawingTile.Row;
tileView.ColumnIndex = drawingTile.Column;
tileView.ZoomLevel = arguments.ZoomLevel;
tileView.TileHeight = tileView.TileWidth = arguments.TileSize;
tileView.Frame = drawingTile.CellExtent;
AddSubview(tileView);
}
}
}
}