private bool DrawImages(Rectangle localBlockView, GoogleRectangle localScreenView)
{
for (var x = localBlockView.Left; x <= localBlockView.Right; x++)
{
for (var y = localBlockView.Top; y <= localBlockView.Bottom; y++)
{
var block = new GoogleBlock(x, y, Level);
var pt = ((GoogleCoordinate)block).GetScreenPoint(localScreenView);
var bmp = FindImage(block);
if (bmp != null)
{
DrawBitmap(bmp, pt);
}
else
{
DrawBitmap(_emptyBlock, pt);
PutMapThreadEvent(WorkerEventType.DownloadImage, block, EventPriorityType.Idle);
}
if (Terminating)
{
return(true);
}
if (localScreenView.CompareTo(ScreenView) != 0)
{
return(false);
}
}
}
return(true);
}
public SpatialSheet <TNode> this[GoogleBlock block]
{
get
{
SpatialSheet <TNode> sheet;
if (_children == null)
{
_children = new SortedDictionary <GoogleBlock, SpatialSheet <TNode> >();
}
if (!_children.TryGetValue(block, out sheet))
{
//нужен для тюнинга индекса, содержит количество ветвей индекса на каждом уровне
if (_sheet.Level > 0 && _sheet.Level <= _tree.NodeDimension.Length)
{
_tree.NodeDimension[_sheet.Level - 1]++;
}
sheet = new SpatialSheet <TNode>(
_tree,
_sheet.Level + 1,
_sheet.NextGoogleLevel,
(GoogleRectangle)block);
_children.Add(block, sheet);
}
return(sheet);
}
}
public static Bitmap DownloadImageFromGoogle(GoogleBlock block, bool getBitmap)
{
try
{
var oRequest = GoogleMapUtilities.CreateGoogleWebRequest(block);
var oResponse = (HttpWebResponse)oRequest.GetResponse();
var bmpStream = new MemoryStream();
var oStream = oResponse.GetResponseStream();
if (oStream != null)
{
oStream.CopyTo(bmpStream);
}
oResponse.Close();
if (bmpStream.Length > 0)
{
WriteImageToFile(block, bmpStream);
return(getBitmap ? (Bitmap)Image.FromStream(bmpStream) : null);
}
}
catch (Exception ex)
{
//do nothing
System.Diagnostics.Trace.WriteLine(ex.Message);
}
return(null);
}
private void DownloadImage(GoogleBlock block)
{
if (MapCache.ContainsKey(block))
{
var dimg = MapCache[block];
if (dimg.Bmp != null) //to turn off compile warning
{
dimg.Timestamp = DateTime.Now.Ticks;
}
}
else
{
var bmp = DownloadImageFromFile(block) ?? DownloadImageFromGoogle(block, true);
if (bmp != null)
{
bmp = CreateCompatibleBitmap(bmp, GoogleBlock.BlockSize, GoogleBlock.BlockSize, PiFormat);
var dimg = new MapCacheItem {
Timestamp = DateTime.Now.Ticks, Bmp = bmp
};
MapCache[block] = dimg;
TruncateImageCache(block);
PutMapThreadEvent(WorkerEventType.DrawImage, block, EventPriorityType.Low);
}
}
}
private void LineSheetAction(TNode node, SheetActionType actionType)
{
var blockViewLevel = NextGoogleLevel;
var line = node.Rectangle;
var rect = new GoogleRectangle(line, blockViewLevel).BlockView;
var deltaX = (rect.Left <= rect.Right) ? 1 : -1;
var deltaY = (rect.Top <= rect.Bottom) ? 1 : -1;
//line search in daughter sheet
for (var x = rect.Left; (deltaX == 1 && x <= rect.Right) || (deltaX == -1 && x >= rect.Right); x += deltaX)
{
for (var y = rect.Top; (deltaY == 1 && y <= rect.Bottom) || (deltaY == -1 && y >= rect.Bottom); y += deltaY)
{
var block = new GoogleBlock(x, y, blockViewLevel);
var googleRect = (GoogleRectangle)block;
if (googleRect.LineContains(line) != InterseptResult.None)
{
lock (this)
{
var sheet = Sheets[block];
sheet.SheetAction(node, actionType);
PostSheetAction(block, sheet, actionType);
}
}
}
}
}
private static void WriteImageToFile(GoogleBlock block, Stream bmpStream)
{
var fileName = Properties.Settings.GetMapFileName(block);
try
{
if (!File.Exists(fileName))
{
var path = Path.GetDirectoryName(fileName) ?? "";
var destdir = new DirectoryInfo(path);
if (!destdir.Exists)
{
destdir.Create();
}
var fileStream = File.Create(fileName);
try
{
bmpStream.Seek(0, SeekOrigin.Begin);
bmpStream.CopyTo(fileStream);
}
finally
{
fileStream.Flush();
fileStream.Close();
}
}
}
catch (Exception ex)
{
//do nothing
System.Diagnostics.Trace.WriteLine(ex.Message);
}
}
private void RectangleSheetAction(TNode node, SheetActionType actionType)
{
var blockViewLevel = NextGoogleLevel;
var rect = new GoogleRectangle(node.Rectangle, blockViewLevel).BlockView;
var deltaX = (rect.Left <= rect.Right) ? 1 : -1;
var deltaY = (rect.Top <= rect.Bottom) ? 1 : -1;
//rectangle search in daughter sheet
for (var x = rect.Left; (deltaX == 1 && x <= rect.Right) || (deltaX == -1 && x >= rect.Right); x += deltaX)
{
for (var y = rect.Top; (deltaY == 1 && y <= rect.Bottom) || (deltaY == -1 && y >= rect.Bottom); y += deltaY)
{
var block = new GoogleBlock(x, y, blockViewLevel);
lock (this)
{
var sheet = Sheets[block];
sheet.SheetAction(node, actionType);
PostSheetAction(block, sheet, actionType);
}
}
}
}
private void DownloadThread(CancellationToken ct)
{
var leftBound = new Coordinate(Properties.Settings.Default.LeftMapBound, Properties.Settings.Default.TopMapBound);
var rightBound = new Coordinate(Properties.Settings.Default.RightMapBound, Properties.Settings.Default.BottomMapBound);
var rectBound = new CoordinateRectangle(leftBound, rightBound);
var mapBlockCount = 0;
for (var mapLevel = Properties.Settings.Default.MinZoomLevel; mapLevel <= Properties.Settings.Default.MaxZoomLevel; mapLevel++)
{
var mapWidth = Convert.ToInt32((new GoogleCoordinate(rectBound.RightTop, mapLevel)).X - (new GoogleCoordinate(rectBound.LeftTop, mapLevel)).X) + 2 * GoogleBlock.BlockSize;
var mapHeight = Convert.ToInt32((new GoogleCoordinate(rectBound.LeftBottom, mapLevel)).Y - (new GoogleCoordinate(rectBound.LeftTop, mapLevel)).Y) + 2 * GoogleBlock.BlockSize;
var viewBound = rectBound.LineMiddlePoint.GetScreenViewFromCenter(mapWidth, mapHeight, mapLevel);
var blockView = viewBound.BlockView;
mapBlockCount += (blockView.Right - blockView.Left + 1) * (blockView.Bottom - blockView.Top + 1);
}
var mapBlockNumber = 0;
BeginInvoke(ProgressEvent, new Object[] { mapBlockNumber * 100 / mapBlockCount, mapBlockNumber, mapBlockCount });
for (var mapLevel = Properties.Settings.Default.MinZoomLevel; mapLevel <= Properties.Settings.Default.MaxZoomLevel; mapLevel++)
{
var mapWidth = Convert.ToInt32((new GoogleCoordinate(rectBound.RightTop, mapLevel)).X - (new GoogleCoordinate(rectBound.LeftTop, mapLevel)).X) + 2 * GoogleBlock.BlockSize;
var mapHeight = Convert.ToInt32((new GoogleCoordinate(rectBound.LeftBottom, mapLevel)).Y - (new GoogleCoordinate(rectBound.LeftTop, mapLevel)).Y) + 2 * GoogleBlock.BlockSize;
var viewBound = rectBound.LineMiddlePoint.GetScreenViewFromCenter(mapWidth, mapHeight, mapLevel);
var blockView = viewBound.BlockView;
for (var x = blockView.Left; x <= blockView.Right; x++)
{
for (var y = blockView.Top; y <= blockView.Bottom; y++)
{
var block = new GoogleBlock(x, y, mapLevel);
var fileName = Properties.Settings.GetMapFileName(block);
if (!File.Exists(fileName))
{
MapLayer.DownloadImageFromGoogle(block, false);
}
mapBlockNumber++;
BeginInvoke(ProgressEvent, new Object[] { mapBlockNumber * 100 / mapBlockCount, mapBlockNumber, mapBlockCount });
if (ct.IsCancellationRequested)
{
return;
}
}
}
}
BeginInvoke(ProgressEvent, new Object[] { 101, mapBlockNumber, mapBlockCount });
}
public void Remove(GoogleBlock block)
{
if (_children != null)
{
//нужен для тюнинга индекса, содержит количество ветвей индекса на каждом уровне
_tree.NodeDimension[_sheet.Level - 1]--;
_children.Remove(block);
}
}
private static Bitmap FindImage(GoogleBlock block)
{
if (MapCache.ContainsKey(block))
{
var dimg = MapCache[block];
dimg.Timestamp = DateTime.Now.Ticks;
return(dimg.Bmp);
}
return(null);
}
private void GetFullMapThread(CancellationToken ct)
{
var leftBound = new Coordinate(Properties.Settings.Default.LeftMapBound, Properties.Settings.Default.TopMapBound);
var rightBound = new Coordinate(Properties.Settings.Default.RightMapBound, Properties.Settings.Default.BottomMapBound);
var rectBound = new CoordinateRectangle(leftBound, rightBound);
try
{
var mapWidth = Convert.ToInt32((new GoogleCoordinate(rectBound.RightTop, _mapLevel)).X - (new GoogleCoordinate(rectBound.LeftTop, _mapLevel)).X) + 2 * GoogleBlock.BlockSize;
var mapHeight = Convert.ToInt32((new GoogleCoordinate(rectBound.LeftBottom, _mapLevel)).Y - (new GoogleCoordinate(rectBound.LeftTop, _mapLevel)).Y) + 2 * GoogleBlock.BlockSize;
var image = GraphicLayer.CreateCompatibleBitmap(null, mapWidth, mapHeight, _mapPiFormat);
var graphics = Graphics.FromImage(image);
var viewBound = rectBound.LineMiddlePoint.GetScreenViewFromCenter(mapWidth, mapHeight, _mapLevel);
var blockView = viewBound.BlockView;
var mapBlockCount = (blockView.Right - blockView.Left + 1) * (blockView.Bottom - blockView.Top + 1);
var mapBlockNumber = 0;
BeginInvoke(ProgressEvent, new Object[] { mapBlockNumber * 100 / mapBlockCount, mapBlockNumber, mapBlockCount });
for (var x = blockView.Left; x <= blockView.Right; x++)
{
for (var y = blockView.Top; y <= blockView.Bottom; y++)
{
var block = new GoogleBlock(x, y, _mapLevel);
var bmp = GraphicLayer.CreateCompatibleBitmap(
MapLayer.DownloadImageFromFile(block) ?? MapLayer.DownloadImageFromGoogle(block, true),
GoogleBlock.BlockSize, GoogleBlock.BlockSize, _mapPiFormat);
var rect = ((GoogleRectangle)block).GetScreenRect(viewBound);
graphics.DrawImageUnscaled(bmp, rect.Location.X, rect.Location.Y);
mapBlockNumber++;
BeginInvoke(ProgressEvent, new Object[] { mapBlockNumber * 100 / mapBlockCount, mapBlockNumber, mapBlockCount });
if (ct.IsCancellationRequested)
{
return;
}
}
}
BeginInvoke(SaveMapEvent, new Object[] { image });
}
catch (Exception e)
{
BeginInvoke(ProgressEvent, new Object[] { 101, 0, 0 });
MessageBox.Show(e.Message, @"Error!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
// ReSharper restore UnusedMember.Local
public static string GetMapFileName(GoogleBlock block)
{
var mapPath = Default.MapCacheLocalPath;
if (!Path.IsPathRooted(mapPath))
{
mapPath = Path.Combine(
Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData),
mapPath);
}
var fileName = Path.Combine(mapPath, block.Level + "\\" + (block.X / 100) + "_" + (block.Y / 100) + "\\" + block.Level + "_" + block.X + "_" + block.Y + ".png");
return(fileName);
}
private void PostSheetAction(GoogleBlock block, SpatialSheet <TNode> sheet, SheetActionType actionType)
{
switch (actionType)
{
case SheetActionType.Delete:
{
//delete sheet from index without elements
if (sheet.IsEmpty)
{
Sheets.Remove(block);
}
} break;
}
}
public static Bitmap DownloadImageFromFile(GoogleBlock block)
{
try
{
var fileName = Properties.Settings.GetMapFileName(block);
if (File.Exists(fileName))
{
var bmp = (Bitmap)Image.FromFile(fileName);
return(bmp);
}
}
catch (Exception ex)
{
//do nothing
System.Diagnostics.Trace.WriteLine(ex.Message);
}
return(null);
}
private void DrawImage(GoogleBlock block)
{
if (Terminating)
{
return;
}
if (block.Level == Level && block.Pt.Contains(_blockView))
{
var bmp = FindImage(block);
if (bmp != null)
{
var rect = ((GoogleRectangle)block).GetScreenRect(ScreenView);
DrawBitmap(bmp, rect.Location);
FireIvalidateLayer(rect);
}
}
}
private void TruncateImageCache(GoogleBlock newCacheItem)
{
while (MapCache.Count > MaxCacheSize)
{
var mt = GoogleBlock.Empty;
var lTicks = DateTime.Now.Ticks;
foreach (var lt in MapCache)
{
if (lt.Value.Timestamp < lTicks && lt.Key.CompareTo(newCacheItem) != 0)
{
mt = lt.Key;
lTicks = lt.Value.Timestamp;
}
}
if (mt != GoogleBlock.Empty)
{
MapCache.Remove(mt);
}
}
}
public MapWorkerEvent(WorkerEventType eventType, GoogleBlock block, EventPriorityType priorityType)
: base(eventType, true, priorityType)
{
Block = block;
}
private void PutMapThreadEvent(WorkerEventType eventType, GoogleBlock block, EventPriorityType priorityType)
{
PutWorkerThreadEvent(new MapWorkerEvent(eventType, block, priorityType));
}
