protected override void OnElementChanged(ElementChangedEventArgs <Map> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
// Unsubscribe
}
if (e.NewElement != null)
{
formsMap = (CommonMap)e.NewElement;
nativeMap = Control as MapControl;
routeCoordinates = formsMap.RouteCoordinates;
lastCoordinates = formsMap.LastCoordinates;
positionCount = formsMap.positionCount;
refreshRoud = formsMap.refreshRoud;
if (formsMap.platformRoad.GetType() == typeof(object))
{
formsMap.platformRoad = new List <BasicGeoposition>();
}
wholeRoad = (List <BasicGeoposition>)formsMap.platformRoad;
}
}
protected override void OnElementChanged(Xamarin.Forms.Platform.Android.ElementChangedEventArgs <Map> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
// Unsubscribe
}
if (e.NewElement != null)
{
formsMap = (CommonMap)e.NewElement;
routeCoordinates = formsMap.RouteCoordinates;
lastCoordinates = formsMap.LastCoordinates;
positionCount = formsMap.positionCount;
refreshRoud = formsMap.refreshRoud;
if (formsMap.platformRoad.GetType() == typeof(object))
{
formsMap.platformRoad = new PolylineOptions();
}
wholeRoad = (PolylineOptions)formsMap.platformRoad;
Control.GetMapAsync(this);
}
}
protected override void OnElementChanged(ElementChangedEventArgs <View> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
var nativeMap = Control as MKMapView;
if (nativeMap != null)
{
nativeMap.RemoveOverlays(nativeMap.Overlays);
nativeMap.OverlayRenderer = null;
}
}
if (e.NewElement != null)
{
formsMap = (CommonMap)e.NewElement;
nativeMap = Control as MKMapView;
routeCoordinates = formsMap.RouteCoordinates;
lastCoordinates = formsMap.LastCoordinates;
positionCount = formsMap.positionCount;
refreshRoud = formsMap.refreshRoud;
nativeMap.OverlayRenderer = GetOverlayRenderer;
nativeMap.AddOverlay(new MKPolyline());
if (formsMap.platformRoad.GetType() == typeof(object))
{
formsMap.platformRoad = new List <CLLocationCoordinate2D>();
}
wholeRoad = (List <CLLocationCoordinate2D>)formsMap.platformRoad;
}
}
public MapImageData GetImage()
{
StringCollection visibleLayers = null;
if (_appState.VisibleLayers.ContainsKey(_appState.MapTab))
{
visibleLayers = _appState.VisibleLayers[_appState.MapTab];
}
string keyExtent = _appState.Extent.ToDelimitedString();
string keySize = _width.ToString() + "," + _height.ToString();
string keyLayers = visibleLayers != null?visibleLayers.ToString('|') : "";
string key = String.Format("{0}|{1}|{2}|{3}|{4}|{5}", _appState.MapTab, _appState.Level, keyExtent, keySize, _resolution, keyLayers);
CommonImageType imageType = CommonImageType.Png;
byte[] image = null;
MapImageData mapImageData = AppContext.ServerImageCache.Retrieve(key);
if (mapImageData != null)
{
imageType = mapImageData.Type;
image = mapImageData.Image;
}
Configuration config = AppContext.GetConfiguration();
Configuration.MapTabRow mapTab = config.MapTab.FindByMapTabID(_appState.MapTab);
CommonDataFrame dataFrame = AppContext.GetDataFrame(mapTab);
bool isInteractive = !mapTab.IsInteractiveLegendNull() && mapTab.InteractiveLegend == 1;
// create the base image if not found in the cache
if (image == null)
{
CommonMap map = dataFrame.GetMap(_width, _height, _extent);
map.Resolution = _resolution;
map.ImageType = CommonImageType.Png;
double pixelSize = map.Extent.Width / _width;
Dictionary <int, CommonLayer> layerList = new Dictionary <int, CommonLayer>();
Dictionary <int, String> definitionList = new Dictionary <int, String>();
List <String> mapTabLayerIds = new List <String>();
foreach (Configuration.MapTabLayerRow mapTabLayer in mapTab.GetMapTabLayerRows())
{
Configuration.LayerRow layer = mapTabLayer.LayerRow;
mapTabLayerIds.Add(layer.LayerID);
CommonLayer commonLayer = dataFrame.Layers.FirstOrDefault(lyr => String.Compare(lyr.Name, layer.LayerName, true) == 0);
int index = dataFrame.Layers.IndexOf(commonLayer);
bool visibleAtScale = commonLayer.IsWithinScaleThresholds(pixelSize);
bool shownInLegend = !mapTabLayer.IsShowInLegendNull() && mapTabLayer.ShowInLegend == 1;
bool checkedInLegend = !isInteractive || mapTabLayer.IsCheckInLegendNull() || mapTabLayer.CheckInLegend < 0 || (visibleLayers != null && visibleLayers.Contains(layer.LayerID));
bool validLevel = layer.IsLevelFieldNull() || !String.IsNullOrEmpty(_appState.Level);
if (!layerList.ContainsKey(index) && visibleAtScale && (!shownInLegend || checkedInLegend) && validLevel)
{
if (commonLayer.Type == CommonLayerType.Image)
{
map.ImageType = CommonImageType.Jpg;
}
layerList.Add(index, commonLayer);
definitionList.Add(index, layer.GetLevelQuery(commonLayer, _appState.Level));
}
}
if (!mapTab.IsBaseMapIDNull())
{
foreach (Configuration.LayerRow layer in config.Layer.Where(o => !o.IsBaseMapIDNull() && o.BaseMapID == mapTab.BaseMapID))
{
if (!mapTabLayerIds.Contains(layer.LayerID))
{
CommonLayer commonLayer = dataFrame.Layers.FirstOrDefault(o => String.Compare(o.Name, layer.LayerName, true) == 0);
int index = dataFrame.Layers.IndexOf(commonLayer);
bool visibleAtScale = commonLayer.IsWithinScaleThresholds(pixelSize);
if (!layerList.ContainsKey(index) && visibleAtScale)
{
if (commonLayer.Type == CommonLayerType.Image)
{
map.ImageType = CommonImageType.Jpg;
}
layerList.Add(index, commonLayer);
definitionList.Add(index, layer.GetLevelQuery(commonLayer, _appState.Level));
}
}
}
}
int[] indexes = new int[layerList.Keys.Count];
layerList.Keys.CopyTo(indexes, 0);
List <int> indexList = new List <int>(indexes);
indexList.Sort();
for (int i = 0; i < indexList.Count; ++i)
{
map.AddLayer(layerList[indexList[i]], definitionList[indexList[i]]);
}
imageType = map.ImageType;
image = map.GetImageBytes();
AppContext.ServerImageCache.Store(key, new MapImageData(imageType, image));
}
// draw the selected feature graphics and markup
if (_appState.TargetIds.Count > 0 || _appState.SelectionIds.Count > 0 || _appState.MarkupGroups.Count > 0 || _appState.Markup.Count > 0)
{
Bitmap bitmap = new Bitmap(new MemoryStream(image));
bitmap.SetResolution(dataFrame.Dpi, dataFrame.Dpi);
Graphics graphics = Graphics.FromImage(bitmap);
if (_appState.TargetIds.Count > 0 || _appState.SelectionIds.Count > 0)
{
StringCollection targetIds;
StringCollection filteredIds;
StringCollection selectionIds;
PrepareIds(out targetIds, out filteredIds, out selectionIds);
DrawFeatures(graphics, _appState.TargetLayer, filteredIds, AppSettings.FilteredColor, AppSettings.FilteredOpacity, AppSettings.FilteredPolygonMode, AppSettings.FilteredPenWidth, AppSettings.FilteredDotSize);
DrawFeatures(graphics, _appState.SelectionLayer, selectionIds, AppSettings.SelectionColor, AppSettings.SelectionOpacity, AppSettings.SelectionPolygonMode, AppSettings.SelectionPenWidth, AppSettings.SelectionDotSize);
DrawFeatures(graphics, _appState.TargetLayer, targetIds, AppSettings.TargetColor, AppSettings.TargetOpacity, AppSettings.TargetPolygonMode, AppSettings.TargetPenWidth, AppSettings.TargetDotSize);
DrawFeatures(graphics, _appState.TargetLayer, _appState.ActiveMapId, AppSettings.ActiveColor, AppSettings.ActiveOpacity, AppSettings.ActivePolygonMode, AppSettings.ActivePenWidth, AppSettings.ActiveDotSize);
IGeometry selectionBuffer = _appState.SelectionManager.GetSelectionBuffer();
if (selectionBuffer != null)
{
Brush bufferBrush = new SolidBrush(Color.FromArgb(Convert.ToInt32(255 * AppSettings.BufferOpacity), AppSettings.BufferColor));
Pen bufferPen = AppSettings.BufferOutlineOpacity > 0 ? new Pen(new SolidBrush(Color.FromArgb(Convert.ToInt32(255 * AppSettings.BufferOutlineOpacity), AppSettings.BufferOutlineColor)), AppSettings.BufferOutlinePenWidth) : null;
switch (selectionBuffer.OgcGeometryType)
{
case OgcGeometryType.Polygon:
DrawPolygon(graphics, (IPolygon)selectionBuffer, bufferBrush, null, bufferPen);
break;
case OgcGeometryType.MultiPolygon:
DrawMultiPolygon(graphics, (IMultiPolygon)selectionBuffer, bufferBrush, null, bufferPen);
break;
}
}
}
graphics.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.AntiAlias;
DrawMarkup(graphics);
MemoryStream memoryStream = new MemoryStream();
if (imageType == CommonImageType.Jpg)
{
ImageCodecInfo imageCodecInfo = GetEncoderInfo("image/jpeg");
EncoderParameters encoderParameters = new EncoderParameters(1);
encoderParameters.Param[0] = new EncoderParameter(Encoder.Quality, 85L);
bitmap.Save(memoryStream, imageCodecInfo, encoderParameters);
}
else
{
bitmap.Save(memoryStream, bitmap.RawFormat);
}
image = memoryStream.ToArray();
}
return(new MapImageData(imageType, image));
}