private void SetUpZoom()
{
if (ZoomLevelStack != null)
{
System.Collections.Generic.List <double> resolutions = new System.Collections.Generic.List <double>();
foreach (Layer layer in Map.Layers)
{
if (layer is TiledMapServiceLayer)
{
TiledMapServiceLayer tlayer = layer as TiledMapServiceLayer;
if (tlayer.TileInfo == null || tlayer.TileInfo.Lods == null)
{
continue;
}
var res = from t in tlayer.TileInfo.Lods
select t.Resolution;
resolutions.AddRange(res);
}
}
if (resolutions.Count < 1)
{
return;
}
resolutions.Sort();
layerResolutions = resolutions.Distinct().Reverse().ToArray();
StackPanel sp = ZoomLevelStack;
int min = 0;
int max = layerResolutions.Length - 1;
int numLevels = max + 1 - min;
double levelWidth = (100 / numLevels);
for (int i = min; i <= max; i++)
{
SolidColorBrush brush = setLevelBrush(i);
Border levelBorder = new Border()
{
BorderThickness = new Thickness(0.5),
CornerRadius = new CornerRadius(1),
Width = levelWidth,
Height = 14,
BorderBrush = new SolidColorBrush(Color.FromArgb(255, 0, 0, 0)),
Background = brush,
Tag = i
};
levelBorder.MouseLeftButtonDown += levelBorder_MouseLeftButtonDown;
levelBorder.MouseMove += levelBorder_MouseMove;
levelBorder.MouseLeftButtonUp += levelBorder_MouseLeftButtonUp;
sp.Children.Add(levelBorder);
}
sp.MouseLeave += new MouseEventHandler(sp_MouseLeave);
zoomSetUp = true;
}
}
/// <summary>
/// Sets up the parameters of the ZoomSlider
/// </summary>
public void SetupZoom()
{
System.Collections.Generic.List <double> resolutions = new System.Collections.Generic.List <double>();
foreach (Layer layer in Map.Layers)
{
if (layer is TiledMapServiceLayer)
{
TiledMapServiceLayer tlayer = layer as TiledMapServiceLayer;
if (tlayer.TileInfo == null || tlayer.TileInfo.Lods == null)
{
continue;
}
var res = from t in tlayer.TileInfo.Lods
select t.Resolution;
resolutions.AddRange(res);
}
}
resolutions.Sort();
layerResolutions = resolutions.Distinct().Reverse().ToArray();
int count = layerResolutions.Length;
if (ZoomSlider != null)
{
if (count > 0)
{
ZoomSlider.Minimum = 0;
ZoomSlider.Maximum = count - 1;
Map.MaximumResolution = layerResolutions[0];
Map.MinimumResolution = layerResolutions[count - 1];
double level = getValueFromMap(Map.Extent);
if (level >= 0)
{
ZoomSlider.Value = level;
}
ZoomSlider.Visibility = Visibility.Visible;
_resolutionsDefined = true;
}
else
{
ZoomSlider.Visibility = Visibility.Collapsed;
}
}
}
private void switchBaseMapLayer(TiledMapServiceLayer baseMapLayer, Envelope newExtent, List<Layer> oldBasemapLayers)
{
if (Map == null)
return;
// 1. Save the operational layers (We assume a single base layer)
System.Collections.Generic.Stack<Layer> layers = new System.Collections.Generic.Stack<Layer>();
for (int i = Map.Layers.Count - 1; i >= 0; i--)
{
Layer l = Map.Layers[i];
if (oldBasemapLayers.Contains(l))
continue;
Map.Layers.RemoveAt(i);
layers.Push(l);
}
// 2. Clear the layers collection
Map.Layers.Clear();
// 3. Set the extent
bool spatialReferenceUnchanged = Map.SpatialReference.Equals(newExtent.SpatialReference);
Map.Extent = newExtent;
// 4a. Set layer id if this is not set
if (string.IsNullOrEmpty(baseMapLayer.ID) || (!string.IsNullOrEmpty(baseMapLayer.ID) && Map.Layers[baseMapLayer.ID] != null))
baseMapLayer.ID = Guid.NewGuid().ToString("N");
// 4. Add the new base map
Map.Layers.Add(baseMapLayer);
// 5. Re-add the operational layers
while (layers.Count > 0)
{
Layer layer = layers.Pop();
if (!spatialReferenceUnchanged)
{
//reproject graphics layers that are not feature layers
// Feature layers support reprojection
if (layer is GraphicsLayer && !(layer is FeatureLayer))
{
GraphicsLayer graphicsLayer = layer as GraphicsLayer;
if (graphicsLayer.Graphics.Count > 0)
{
GeometryServiceOperationHelper helper = new GeometryServiceOperationHelper(
new ConfigurationStoreHelper().GetGeometryServiceUrl(ConfigurationStore));
helper.ProjectGraphicsCompleted += (o, e) =>
{
GraphicsLayer targetLayer = e.UserState as GraphicsLayer;
if (targetLayer != null)
{
targetLayer.Graphics.Clear();
foreach (Graphic graphic in e.Graphics)
targetLayer.Graphics.Add(graphic);
}
};
helper.ProjectGraphics(graphicsLayer.Graphics, newExtent.SpatialReference, graphicsLayer);
}
// update the map spatial reference on custom layers
ICustomGraphicsLayer customGraphicsLayer = layer as ICustomGraphicsLayer;
if (customGraphicsLayer != null)
customGraphicsLayer.MapSpatialReference = Map.SpatialReference;
else
{
HeatMapLayerBase heatMapLayer = layer as HeatMapLayerBase;
if (heatMapLayer != null)
heatMapLayer.MapSpatialReference = Map.SpatialReference;
}
}
else
{
HeatMapLayerBase heatMapLayer = layer as HeatMapLayerBase;
if (heatMapLayer != null && heatMapLayer.HeatMapPoints.Count > 0)
{
GeometryServiceOperationHelper helper = new GeometryServiceOperationHelper(new ConfigurationStoreHelper().GetGeometryServiceUrl(ConfigurationStore));
helper.ProjectPointsCompleted += (o, e) =>
{
PointCollection points = new PointCollection();
foreach (MapPoint item in e.Points)
{
if (item != null)
points.Add(item);
}
heatMapLayer.HeatMapPoints = points;
heatMapLayer.MapSpatialReference = points[0].SpatialReference;
heatMapLayer.Refresh();
};
helper.ProjectPoints(heatMapLayer.HeatMapPoints, newExtent.SpatialReference);
}
}
}
Map.Layers.Add(layer);
}
}
