////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 21JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* get MapFeature at given mapInfoID.
* @param mapInfoID the index of the record(MapInfoID).
* @return MapFeature at given mapInfoID.
*/
public MapFeature GetMapFeatureByID(int mapInfoID)
{
MapFeature mapFeature;
int mapObjectIDKey = mapInfoID;
if (_mapObjectCache.ContainsKey(mapObjectIDKey))
{
mapFeature = (MapFeature)_mapObjectCache[mapObjectIDKey];
}
else
{
mapFeature = new MapFeature();
mapFeature.MapInfoID = mapInfoID;
mapFeature.MapObject = GetMapObjectByID(mapInfoID);
mapFeature.DataRowValue = GetDataRowValueByID(mapInfoID);
mapFeature.MapObject.Name =
mapFeature.DataRowValue.GetString(_keyFieldIndex);
StoreToCache(mapObjectIDKey, mapFeature);
}
return(mapFeature);
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 21JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Store the mapFeature to cache.
* @param mapObjectIDKey the mapInfo ID key.
* @param mapFeature the map feature to be cached.
*/
private void StoreToCache(int mapObjectIDKey, MapFeature mapFeature)
{
if (_mapObjectCache.Count >= CACHE_SIZE)
{
MapFeature[] mapFeatures = new MapFeature[CACHE_SIZE];
ICollection enuValues = _mapObjectCache.Values;
int index = 0;
foreach (var o in enuValues)
{
mapFeatures[index++] = (MapFeature)o;
}
SortMapFeature(mapFeatures);
for (int i = 0; i < CACHE_SIZE / 2; i++)
{
int deleteMapObjectID = mapFeatures[i].MapInfoID;
_mapObjectCache.Remove(deleteMapObjectID);
}
}
_mapObjectCache.Add(mapObjectIDKey, mapFeature);
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 21JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* sort the map feature array.
*/
private static void SortMapFeature(MapFeature[] mapFeatures)
{
int n = mapFeatures.Length;
int i, j;
MapFeature ai;
for (i = 1; i < n; i++)
{
j = i - 1;
ai = mapFeatures[i];
while (mapFeatures[j].MapObject.CacheAccessTime >
ai.MapObject.CacheAccessTime)
{
mapFeatures[j + 1] = mapFeatures[j];
j--;
if (j < 0) break;
}
mapFeatures[j + 1] = ai;
}
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 21JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* get MapFeature at given mapInfoID.
* @param mapInfoID the index of the record(MapInfoID).
* @return MapFeature at given mapInfoID.
*/
public MapFeature GetMapFeatureByID(int mapInfoID)
{
MapFeature mapFeature;
int mapObjectIDKey = mapInfoID;
if (_mapObjectCache.ContainsKey(mapObjectIDKey))
{
mapFeature = (MapFeature)_mapObjectCache[mapObjectIDKey];
}
else
{
mapFeature = new MapFeature();
mapFeature.MapInfoID = mapInfoID;
mapFeature.MapObject = GetMapObjectByID(mapInfoID);
mapFeature.DataRowValue = GetDataRowValueByID(mapInfoID);
mapFeature.MapObject.Name =
mapFeature.DataRowValue.GetString(_keyFieldIndex);
StoreToCache(mapObjectIDKey, mapFeature);
}
return mapFeature;
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 21JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* @inheritDoc
*/
public override void GetImage(int mtype, int x, int y, int zoomLevel)
{
lock (VectorMapAbstractCanvas.GRAPHICS_MUTEX)
{
int shiftWidth = 32;
GeoPoint pt1 = new GeoPoint(x * MapLayer.MAP_TILE_WIDTH - shiftWidth,
y * MapLayer.MAP_TILE_WIDTH - shiftWidth);
GeoPoint pt2 = new GeoPoint((x + 1) * MapLayer.MAP_TILE_WIDTH + shiftWidth,
(y + 1) * MapLayer.MAP_TILE_WIDTH + shiftWidth);
GeoLatLng latLng1 = MapLayer.FromPixelToLatLng(pt1, zoomLevel);
GeoLatLng latLng2 = MapLayer.FromPixelToLatLng(pt2, zoomLevel);
double minY = Math.Min(latLng1.Lat(), latLng2.Lat());
double maxY = Math.Max(latLng1.Lat(), latLng2.Lat());
double minX = Math.Min(latLng1.Lng(), latLng2.Lng());
double maxX = Math.Max(latLng1.Lng(), latLng2.Lng());
double width = 0.00;
double height = 0.00;
//width = width < 0.06 ? 0.06 : width;
//height = height < 0.06 ? 0.06 : height;
GeoLatLngBounds geoBounds = new GeoLatLngBounds(minX - width / 2.0, minY - height / 2.0,
maxX - minX + width, maxY - minY + height);
try
{
Hashtable[] mapFeatures = _geoSet.Search(geoBounds);
int totalSize = 0;
for (int i = 0; i < mapFeatures.Length; i++)
{
Hashtable mapFeaturesInLayer = mapFeatures[i];
totalSize += mapFeaturesInLayer.Count;
}
totalSize += 1;
int mapObjectIndex = 0;
_vectorMapCanvas.ClearCanvas(0xffffff);
for (int i = 0; i < mapFeatures.Length; i++)
{
int zOrder = mapFeatures.Length - 1 - i;
Hashtable mapFeaturesInLayer = mapFeatures[zOrder];
ICollection enuKeys = mapFeaturesInLayer.Keys;
MapFeatureLayer mapLayer = _geoSet.GetMapFeatureLayer(zOrder);
foreach (var o in enuKeys)
{
int mapInfoID = (int)o;
MapFeature mapFeature = mapLayer
.GetMapFeatureByID(mapInfoID);
mapObjectIndex++;
_vectorMapCanvas.SetFont(GetFont(mapLayer.FontName));
_vectorMapCanvas.SetFontColor(mapLayer.FontColor);
_vectorMapCanvas.DrawMapObject(mapFeature.MapObject,
geoBounds, zoomLevel);
if (_readListener != null)
{
_readListener.readProgress(mapObjectIndex,
totalSize);
}
}
}
_vectorMapCanvas.DrawMapText();
ImageArray = PNGEncoder.GetPngrgb(MapLayer.MAP_TILE_WIDTH,
MapLayer.MAP_TILE_WIDTH,
_vectorMapCanvas.GetRGB());
ImageArraySize = ImageArray.Length;
IsImagevalid = true;
if (ImageArraySize == 1933)
{
ImageArray = null;
IsImagevalid = false;
ImageArraySize = 0;
}
if (_readListener != null)
{
_readListener.readProgress(totalSize, totalSize);
}
}
catch (Exception e)
{
}
}
}
