private void CreateRedlineLayer()
{
MgMapBase map = mgMapViewer1.GetMap();
MgdServiceFactory fact = new MgdServiceFactory();
MgdFeatureService featSvc = (MgdFeatureService)fact.CreateService(MgServiceType.FeatureService);
MgResourceService resSvc = (MgResourceService)fact.CreateService(MgServiceType.ResourceService);
//Note that mg-desktop does not have a concept of sessions like the
//official MapGuide API, but it *does* allow session-based resources
//as a way of having temporary resources. Such resources will reside
//in a special directory for session resources (specified in Platform.ini)
//
//You can plug whatever string as the session id, but the resource identifier
//must satisfy the session id pattern:
//
// Session:<session id string>//Path/To/Your.ResourceType
//
//These files are removed with MgPlatform.Terminate(), which is called in this
//application as part of the exiting process.
string sessionId = Guid.NewGuid().ToString();
MgResourceIdentifier fsId = new MgResourceIdentifier("Session:" + sessionId + "//Redline.FeatureSource");
MgResourceIdentifier ldfId = new MgResourceIdentifier("Session:" + sessionId + "//Redline.LayerDefinition");
//Create our point redline schema. It looks like this:
//
// Default
// Redline
// ID (int32, autogenerated)
// Geometry (coordinate system same as map
string featureClass = "Default:Redline";
string geometry = "Geometry";
MgFeatureSchema schema = new MgFeatureSchema("Default", "Redline schema");
MgClassDefinition cls = new MgClassDefinition();
cls.Name = "Redline";
MgDataPropertyDefinition id = new MgDataPropertyDefinition("ID");
id.DataType = MgPropertyType.Int32;
id.SetAutoGeneration(true);
MgGeometricPropertyDefinition geom = new MgGeometricPropertyDefinition(geometry);
geom.SpatialContextAssociation = "Default";
geom.GeometryTypes = MgFeatureGeometricType.Curve | MgFeatureGeometricType.Point | MgFeatureGeometricType.Solid | MgFeatureGeometricType.Surface;
MgPropertyDefinitionCollection clsProps = cls.GetProperties();
clsProps.Add(id);
clsProps.Add(geom);
MgPropertyDefinitionCollection idProps = cls.GetIdentityProperties();
idProps.Add(id);
cls.DefaultGeometryPropertyName = geometry;
MgClassDefinitionCollection classes = schema.GetClasses();
classes.Add(cls);
//Create the feature source with this schema. We use the map's
//coordinate system for the feature source to ensure features
//that we create, will line up with the map
MgFileFeatureSourceParams create = new MgFileFeatureSourceParams("OSGeo.SDF", "Default", map.GetMapSRS(), schema);
featSvc.CreateFeatureSource(fsId, create);
//Then create the layer definition. RedlineLayer.xml contains the template
string xml = string.Format(File.ReadAllText("RedlineLayer.xml"), fsId.ToString(), featureClass, geometry);
var bytes = Encoding.UTF8.GetBytes(xml);
MgByteSource source = new MgByteSource(bytes, bytes.Length);
resSvc.SetResource(ldfId, source.GetReader(), null);
//Now create the runtime layer and add to map
_pointLayer = new MgdLayer(ldfId, resSvc);
_pointLayer.LegendLabel = "Redlining";
_pointLayer.Name = "Redline";
_pointLayer.Visible = true;
_pointLayer.Selectable = true;
_pointLayer.DisplayInLegend = true;
var layers = map.GetLayers();
layers.Insert(0, _pointLayer);
}
private void btnCreatePointsOfInterest_Click(object sender, EventArgs e)
{
string layerName = "Points";
string legendLabel = "Points of Interest";
string groupName = "Analysis";
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
//We use MgdFeatureService instead of MgFeatureService as this sample demonstrates APIs unique to mg-desktop
MgdFeatureService featureService = (MgdFeatureService)provider.CreateService(MgServiceType.FeatureService);
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
MgLayerGroupCollection groups = map.GetLayerGroups();
//NOTE: mg-desktop has no formal concept of a session repository, but we still
//support session-based resources as a form of temporary resource (for the duration
//of the application). Session ids in mg-desktop can be any arbitrary string
string sessionId = Guid.NewGuid().ToString();
if (layers.IndexOf(layerName) >= 0)
{
MessageBox.Show("Layer (" + layerName + ") already created");
return;
}
//---------------------------------------------------//
// Create a feature source with point data.
// (The Sheboygan sample data does not contain such data,
// so we"ll create it.)
// Create a feature class definition for the new feature source
MgClassDefinition classDefinition = new MgClassDefinition();
classDefinition.SetName("Points");
classDefinition.SetDescription("Feature class with point data.");
classDefinition.SetDefaultGeometryPropertyName("GEOM");
MgPropertyDefinitionCollection idProps = classDefinition.GetIdentityProperties();
MgPropertyDefinitionCollection clsProps = classDefinition.GetProperties();
// Create an identify property
MgDataPropertyDefinition identityProperty = new MgDataPropertyDefinition("KEY");
identityProperty.SetDataType(MgPropertyType.Int32);
identityProperty.SetAutoGeneration(true);
identityProperty.SetReadOnly(true);
// Add the identity property to the class definition
clsProps.Add(identityProperty);
idProps.Add(identityProperty);
// Create a name property
MgDataPropertyDefinition nameProperty = new MgDataPropertyDefinition("NAME");
nameProperty.SetDataType(MgPropertyType.String);
// Add the name property to the class definition
clsProps.Add(nameProperty);
// Create a geometry property
MgGeometricPropertyDefinition geometryProperty = new MgGeometricPropertyDefinition("GEOM");
geometryProperty.SetGeometryTypes(MgFeatureGeometricType.Point);
// Add the geometry property to the class definition
clsProps.Add(geometryProperty);
// Create a feature schema
MgFeatureSchema featureSchema = new MgFeatureSchema("PointSchema", "Point schema");
MgClassDefinitionCollection classes = featureSchema.GetClasses();
// Add the feature schema to the class definition
classes.Add(classDefinition);
// Create the feature source
String featureSourceName = "Library://Samples/DevGuide/Data/points.FeatureSource";
MgResourceIdentifier resourceIdentifier = new MgResourceIdentifier(featureSourceName);
//wkt = "LOCALCS[\"*XY-MT*\",LOCAL_DATUM[\"*X-Y*\",10000],UNIT[\"Meter\", 1],AXIS[\"X\",EAST],AXIS[\"Y\",NORTH]]";
String wkt = "GEOGCS[\"LL84\",DATUM[\"WGS84\",SPHEROID[\"WGS84\",6378137.000,298.25722293]],PRIMEM[\"Greenwich\",0],UNIT[\"Degree\",0.01745329251994]]";
MgFileFeatureSourceParams sdfParams = new MgFileFeatureSourceParams("OSGeo.SDF", "LatLong", wkt, featureSchema);
featureService.CreateFeatureSource(resourceIdentifier, sdfParams);
// We need to add some data to the sdf before using it. The spatial context
// reader must have an extent.
MgBatchPropertyCollection batchPropertyCollection = new MgBatchPropertyCollection();
MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter();
MgGeometryFactory geometryFactory = new MgGeometryFactory();
// Make four points
batchPropertyCollection.Add(MakePoint("Point A", -87.727, 43.748, wktReaderWriter, agfReaderWriter));
batchPropertyCollection.Add(MakePoint("Point B", -87.728, 43.730, wktReaderWriter, agfReaderWriter));
batchPropertyCollection.Add(MakePoint("Point C", -87.726, 43.750, wktReaderWriter, agfReaderWriter));
batchPropertyCollection.Add(MakePoint("Point D", -87.728, 43.750, wktReaderWriter, agfReaderWriter));
// Old way commented out
/*
* // Add the batch property collection to the feature source
* MgInsertFeatures cmd = new MgInsertFeatures("Points", batchPropertyCollection);
* MgFeatureCommandCollection featureCommandCollection = new MgFeatureCommandCollection();
* featureCommandCollection.Add(cmd);
*
* // Execute the "add" commands
* featureService.UpdateFeatures(resourceIdentifier, featureCommandCollection, false);
*/
// Here's the mg-desktop way
MgFeatureReader insertResult = featureService.InsertFeatures(resourceIdentifier, "Points", batchPropertyCollection);
insertResult.Close();
// ...
//---------------------------------------------------//
// Create a new layer
LayerDefinitionFactory factory = new LayerDefinitionFactory();
// Create a mark symbol
String resourceId = "Library://Samples/Sheboygan/Symbols/BasicSymbols.SymbolLibrary";
String symbolName = "PushPin";
String width = "24"; // unit = points
String height = "24"; // unit = points
String color = "FFFF0000";
String markSymbol = factory.CreateMarkSymbol(resourceId, symbolName, width, height, color);
// Create a text symbol
String text = "ID";
String fontHeight = "12";
String foregroundColor = "FF000000";
String textSymbol = factory.CreateTextSymbol(text, fontHeight, foregroundColor);
// Create a point rule.
String ruleLegendLabel = "trees";
String filter = "";
String pointRule = factory.CreatePointRule(ruleLegendLabel, filter, textSymbol, markSymbol);
// Create a point type style.
String pointTypeStyle = factory.CreatePointTypeStyle(pointRule);
// Create a scale range.
String minScale = "0";
String maxScale = "1000000000000";
String pointScaleRange = factory.CreateScaleRange(minScale, maxScale, pointTypeStyle);
// Create the layer definiton.
String featureName = "PointSchema:Points";
String geometry = "GEOM";
String layerDefinition = factory.CreateLayerDefinition(featureSourceName, featureName, geometry, pointScaleRange);
//---------------------------------------------------//
// ...
XmlDocument domDocument = new XmlDocument();
domDocument.LoadXml(layerDefinition);
//Add the layer to the map
// TODO: Should probably validate this XML content
using (MemoryStream ms = new MemoryStream())
{
domDocument.Save(ms);
ms.Position = 0L;
//Note we do this to ensure our XML content is free of any BOM characters
byte[] ldfBytes = ms.ToArray();
Encoding utf8 = Encoding.UTF8;
String layerDefStr = new String(utf8.GetChars(ldfBytes));
ldfBytes = new byte[layerDefStr.Length - 1];
int byteCount = utf8.GetBytes(layerDefStr, 1, layerDefStr.Length - 1, ldfBytes, 0);
// Save the new layer definition to the session repository
MgByteSource byteSource = new MgByteSource(ldfBytes, ldfBytes.Length);
MgResourceIdentifier resourceID = new MgResourceIdentifier("Session:" + sessionId + "//" + layerName + ".LayerDefinition");
resourceService.SetResource(resourceID, byteSource.GetReader(), null);
//Insert this layer to our map
MgdLayer newLayer = new MgdLayer(resourceID, resourceService);
newLayer.Name = layerName;
newLayer.LegendLabel = legendLabel;
newLayer.DisplayInLegend = true;
newLayer.SetVisible(true);
layers.Insert(0, newLayer);
//Create analysis group if not already created
if (groups.IndexOf(groupName) < 0)
{
MgLayerGroup group = new MgLayerGroup(groupName);
group.LegendLabel = groupName;
group.DisplayInLegend = true;
groups.Add(group);
newLayer.Group = group;
}
MessageBox.Show("Layer (" + layerName + ") created");
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
}
private void CheckRedlineLayer()
{
if (_redlineLayer == null)
{
MgdMap map = (MgdMap)_viewer.GetMap();
MgMapViewerProvider provider = _viewer.GetProvider();
MgdFeatureService featSvc = (MgdFeatureService)provider.CreateService(MgServiceType.FeatureService);
MgResourceService resSvc = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
string sessionId = Guid.NewGuid().ToString();
MgResourceIdentifier fsId = new MgResourceIdentifier("Session:" + sessionId + "//Redline.FeatureSource");
MgResourceIdentifier ldfId = new MgResourceIdentifier("Session:" + sessionId + "//Redline.LayerDefinition");
string featureClass = "Default:Redline";
string geometry = "Geometry";
string xml = string.Format(Layers.Redline, fsId.ToString(), featureClass, geometry);
//Construct our schema for the redline data store
MgFeatureSchema schema = new MgFeatureSchema("Default", "Redline schema");
MgClassDefinition cls = new MgClassDefinition();
cls.Name = "Redline";
MgDataPropertyDefinition id = new MgDataPropertyDefinition("ID");
id.DataType = MgPropertyType.Int32;
id.SetAutoGeneration(true);
MgGeometricPropertyDefinition geom = new MgGeometricPropertyDefinition(geometry);
geom.SpatialContextAssociation = "Default";
geom.GeometryTypes = MgFeatureGeometricType.Curve | MgFeatureGeometricType.Point | MgFeatureGeometricType.Solid | MgFeatureGeometricType.Surface;
MgPropertyDefinitionCollection clsProps = cls.GetProperties();
clsProps.Add(id);
clsProps.Add(geom);
MgPropertyDefinitionCollection idProps = cls.GetIdentityProperties();
idProps.Add(id);
cls.DefaultGeometryPropertyName = geometry;
MgClassDefinitionCollection classes = schema.GetClasses();
classes.Add(cls);
//Create the feature source
MgFileFeatureSourceParams create = new MgFileFeatureSourceParams("OSGeo.SDF", "Default", map.GetMapSRS(), schema);
featSvc.CreateFeatureSource(fsId, create);
//Then the layer definition
byte[] bytes = Encoding.UTF8.GetBytes(xml);
MgByteSource source = new MgByteSource(bytes, bytes.Length);
resSvc.SetResource(ldfId, source.GetReader(), null);
//Now create the runtime layer and add to map
_redlineLayer = new MgdLayer(ldfId, resSvc);
_redlineLayer.LegendLabel = "Redlining";
_redlineLayer.Name = "Redline";
_redlineLayer.Visible = true;
_redlineLayer.Selectable = true;
_redlineLayer.DisplayInLegend = true;
MgLayerCollection layers = map.GetLayers();
layers.Insert(0, _redlineLayer);
}
}