private void InsertRedlineGeometry(MgGeometry geom)
{
MgPropertyCollection feature = new MgPropertyCollection();
MgByteReader agf = _agfRW.Write(geom);
MgGeometryProperty geomProp = new MgGeometryProperty("Geometry", agf);
feature.Add(geomProp);
_redlineLayer.ForceRefresh();
var reader = _redlineLayer.InsertFeatures(feature);
int inserted = 0;
while (reader.ReadNext())
{
inserted++;
}
reader.Close();
if (inserted > 0)
{
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
}
private void btnRenameRoadsLayer_Click(object sender, EventArgs e)
{
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
bool bRefresh = false;
if (layers.IndexOf("Roads") >= 0)
{
MgLayerBase roads = layers.GetItem("Roads");
roads.Name = "Streets";
roads.LegendLabel = "Streets";
MessageBox.Show("Layer (Roads) has been changed to (Streets)");
btnRenameRoadsLayer.Text = "Rename Streets Layer to Roads";
bRefresh = true;
}
else if (layers.IndexOf("Streets") >= 0)
{
MgLayerBase streets = layers.GetItem("Streets");
streets.Name = "Roads";
streets.LegendLabel = "Roads";
MessageBox.Show("Layer (Streets) has been changed to (Roads)");
btnRenameRoadsLayer.Text = "Rename Roads Layer to Streets";
bRefresh = true;
}
if (bRefresh)
{
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
}
private void btnCreateBuffer_Click(object sender, EventArgs e)
{
MgSelectionBase selection = _viewer.GetSelection();
MgReadOnlyLayerCollection layers = selection.GetLayers();
if (layers == null)
{
MessageBox.Show("Select a parcel");
return;
}
MgLayerBase parcels = null;
for (int i = 0; i < layers.GetCount(); i++)
{
MgLayerBase layer = layers.GetItem(i);
if (layer.Name == "Parcels")
{
parcels = layer;
break;
}
}
if (parcels == null)
{
MessageBox.Show("Select a parcel");
return;
}
int bufferRingSize = 100; // measured in metres
int bufferRingCount = 5;
// Set up some objects for coordinate conversion
MgMapBase map = _viewer.GetMap();
MgLayerCollection mapLayers = map.GetLayers();
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
//Casting to MgdFeatureService because we want to use convenience APIs
MgFeatureService featureService = (MgdFeatureService)provider.CreateService(MgServiceType.FeatureService);
String mapWktSrs = map.GetMapSRS();
MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter();
MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
MgCoordinateSystemFactory coordinateSystemFactory = new MgCoordinateSystemFactory();
MgCoordinateSystem srs = coordinateSystemFactory.Create(mapWktSrs);
MgMeasure srsMeasure = srs.GetMeasure();
string sessionId = Guid.NewGuid().ToString();
BufferHelper helper = new BufferHelper();
// Check for a buffer layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the buffer.
MgdLayer bufferLayer = null;
int layerIndex = mapLayers.IndexOf("Buffer");
if (layerIndex < 0)
{
// The layer does not exist and must be created.
MgResourceIdentifier bufferFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//Buffer.FeatureSource");
helper.CreateBufferFeatureSource(featureService, mapWktSrs, bufferFeatureResId);
bufferLayer = helper.CreateBufferLayer(resourceService, bufferFeatureResId, sessionId);
mapLayers.Insert(0, bufferLayer);
}
else
{
bufferLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
bufferLayer.DeleteFeatures("ID like '%'");
}
// Get the selected features from the MgSelection object
MgFeatureReader featureReader = selection.GetSelectedFeatures(parcels, parcels.GetFeatureClassName(), false);
// Process each item in the MgFeatureReader. Get the
// geometries from all the selected features and
// merge them into a single geometry.
MgGeometryCollection inputGeometries = new MgGeometryCollection();
while (featureReader.ReadNext())
{
MgByteReader featureGeometryData = featureReader.GetGeometry(parcels.GetFeatureGeometryName());
MgGeometry featureGeometry = agfReaderWriter.Read(featureGeometryData);
inputGeometries.Add(featureGeometry);
}
MgGeometryFactory geometryFactory = new MgGeometryFactory();
MgGeometry mergedGeometries = geometryFactory.CreateMultiGeometry(inputGeometries);
// Add buffer features to the temporary feature source.
// Create multiple concentric buffers to show area.
// If the stylization for the layer draws the features
// partially transparent, the concentric rings will be
// progressively darker towards the center.
// The stylization is set in the layer template file, which
// is used in function CreateBufferLayer().
for (int bufferRing = 0; bufferRing < bufferRingCount; bufferRing++)
{
double bufferDist = srs.ConvertMetersToCoordinateSystemUnits(bufferRingSize * (bufferRing + 1));
MgGeometry bufferGeometry = mergedGeometries.Buffer(bufferDist, srsMeasure);
MgPropertyCollection properties = new MgPropertyCollection();
properties.Add(new MgGeometryProperty("BufferGeometry", agfReaderWriter.Write(bufferGeometry)));
MgFeatureReader fr = bufferLayer.InsertFeatures(properties);
fr.Close();
}
bufferLayer.SetVisible(true);
bufferLayer.ForceRefresh();
bufferLayer.SetDisplayInLegend(true);
MessageBox.Show("Buffer created");
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
private void btnFindFeaturesInBuffer_Click(object sender, EventArgs e)
{
MgSelectionBase selection = _viewer.GetSelection();
MgReadOnlyLayerCollection selectedLayers = selection.GetLayers();
if (selectedLayers == null)
{
MessageBox.Show("Select a parcel");
return;
}
MgLayerBase parcels = null;
for (int i = 0; i < selectedLayers.GetCount(); i++)
{
MgLayerBase layer = selectedLayers.GetItem(i);
if (layer.Name == "Parcels")
{
parcels = layer;
break;
}
}
if (parcels == null)
{
MessageBox.Show("Select a parcel");
return;
}
int bufferRingSize = 500; // measured in metres
// Set up some objects for coordinate conversion
MgMapBase map = _viewer.GetMap();
MgLayerCollection mapLayers = map.GetLayers();
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
//Casting to MgdFeatureService because we want to use convenience APIs
MgFeatureService featureService = (MgdFeatureService)provider.CreateService(MgServiceType.FeatureService);
string sessionId = Guid.NewGuid().ToString();
String mapWktSrs = map.GetMapSRS();
MgAgfReaderWriter agfReaderWriter = new MgAgfReaderWriter();
MgWktReaderWriter wktReaderWriter = new MgWktReaderWriter();
MgCoordinateSystemFactory coordinateSystemFactory = new MgCoordinateSystemFactory();
MgCoordinateSystem srs = coordinateSystemFactory.Create(mapWktSrs);
MgMeasure srsMeasure = srs.GetMeasure();
// Check for a buffer layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the buffer.
BufferHelper helper = new BufferHelper();
MgdLayer bufferLayer = null;
int layerIndex = map.GetLayers().IndexOf("Buffer");
if (layerIndex < 0)
{
// The layer does not exist and must be created.
MgResourceIdentifier bufferFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//Buffer.FeatureSource");
helper.CreateBufferFeatureSource(featureService, mapWktSrs, bufferFeatureResId);
bufferLayer = helper.CreateBufferLayer(resourceService, bufferFeatureResId, sessionId);
map.GetLayers().Insert(0, bufferLayer);
}
else
{
bufferLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
bufferLayer.DeleteFeatures("ID like '%'");
}
// Check for a parcel marker layer. If it exists, delete
// the current features.
// If it does not exist, create a feature source and
// a layer to hold the parcel markers.
MgdLayer parcelMarkerLayer = null;
layerIndex = map.GetLayers().IndexOf("ParcelMarker");
if (layerIndex < 0)
{
MgResourceIdentifier parcelFeatureResId = new MgResourceIdentifier("Session:" + sessionId + "//ParcelMarker.FeatureSource");
helper.CreateParcelMarkerFeatureSource(featureService, mapWktSrs, parcelFeatureResId);
parcelMarkerLayer = helper.CreateParcelMarkerLayer(resourceService, parcelFeatureResId, sessionId);
map.GetLayers().Insert(0, parcelMarkerLayer);
}
else
{
parcelMarkerLayer = (MgdLayer)map.GetLayers().GetItem(layerIndex);
parcelMarkerLayer.DeleteFeatures("ID like '%'");
}
// Check each layer in the selection.
for (int i = 0; i < selectedLayers.GetCount(); i++)
{
// Only check selected features in the Parcels layer.
MgdLayer layer = (MgdLayer)selectedLayers.GetItem(i);
if (layer.GetName() == "Parcels")
{
string geomName = layer.GetFeatureGeometryName();
System.Diagnostics.Trace.TraceInformation("Marking all parcels inside the buffer that are of type 'MFG'");
MgFeatureReader featureReader = selection.GetSelectedFeatures(layer, layer.GetFeatureClassName(), false);
// Process each item in the MgFeatureReader. Get the
// geometries from all the selected features and
// merge them into a single geometry.
MgGeometryCollection inputGeometries = new MgGeometryCollection();
while (featureReader.ReadNext())
{
MgByteReader featureGeometryData = featureReader.GetGeometry(geomName);
MgGeometry featureGeometry = agfReaderWriter.Read(featureGeometryData);
inputGeometries.Add(featureGeometry);
}
MgGeometryFactory geometryFactory = new MgGeometryFactory();
MgGeometry mergedGeometries = geometryFactory.CreateMultiGeometry(inputGeometries);
// Create a buffer from the merged geometries
double bufferDist = srs.ConvertMetersToCoordinateSystemUnits(bufferRingSize);
MgGeometry bufferGeometry = mergedGeometries.Buffer(bufferDist, srsMeasure);
// Create a filter to select parcels within the buffer. Combine
// a basic filter and a spatial filter to select all parcels
// within the buffer that are of type "MFG".
MgFeatureQueryOptions queryOptions = new MgFeatureQueryOptions();
queryOptions.SetFilter("RTYPE = 'MFG'");
queryOptions.SetSpatialFilter(geomName, bufferGeometry, MgFeatureSpatialOperations.Inside);
featureReader = layer.SelectFeatures(queryOptions);
// Get the features from the feature source,
// determine the centroid of each selected feature, and
// add a point to the ParcelMarker layer to mark the
// centroid.
// Collect all the points into an MgFeatureCommandCollection,
// so they can all be added in one operation.
MgFeatureCommandCollection parcelMarkerCommands = new MgFeatureCommandCollection();
int inserted = 0;
while (featureReader.ReadNext())
{
MgByteReader byteReader = featureReader.GetGeometry(geomName);
MgGeometry geometry = agfReaderWriter.Read(byteReader);
MgPoint point = geometry.GetCentroid();
// Create an insert command for this parcel.
MgPropertyCollection properties = new MgPropertyCollection();
properties.Add(new MgGeometryProperty("ParcelLocation", agfReaderWriter.Write(point)));
//parcelMarkerCommands.Add(new MgInsertFeatures("ParcelMarkerClass", properties));
MgFeatureReader fr = parcelMarkerLayer.InsertFeatures(properties);
fr.Close();
inserted++;
}
featureReader.Close();
if (inserted == 0)
{
MessageBox.Show("No parcels within the buffer area match.");
return;
}
// Create a feature in the buffer feature source to show the area covered by the buffer.
MgPropertyCollection props = new MgPropertyCollection();
props.Add(new MgGeometryProperty("BufferGeometry", agfReaderWriter.Write(bufferGeometry)));
bufferLayer.InsertFeatures(props);
// Ensure that the buffer layer is visible and in the legend.
bufferLayer.SetVisible(true);
bufferLayer.ForceRefresh();
bufferLayer.SetDisplayInLegend(true);
parcelMarkerLayer.SetVisible(true);
parcelMarkerLayer.ForceRefresh();
MessageBox.Show("Done");
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
}
}
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 btnShowBuildings_Click(object sender, EventArgs e)
{
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
string layerName = "RecentlyBuilt";
string legendLabel = "Built after 1980";
string groupName = "Analysis";
MgMapBase map = _viewer.GetMap();
MgLayerCollection layers = map.GetLayers();
MgLayerGroupCollection groups = map.GetLayerGroups();
if (layers.IndexOf(layerName) >= 0)
{
MessageBox.Show("Layer (" + layerName + ") already created");
return;
}
//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();
XmlDocument domDocument = new XmlDocument();
domDocument.LoadXml(Layers.RecentlyBuilt);
// Get a list of all the <AreaRule><Filter> elements in
// the XML.
XmlNodeList nodes = domDocument.SelectNodes("//AreaRule/Filter");
// Find the correct node and change it
foreach (XmlNode node in nodes)
{
if (node.InnerText == "YRBUILT > 1950")
{
node.InnerText = "YRBUILT > 1980";
}
}
// Get a list of all the <LegendLabel> elements in the
// XML.
nodes = domDocument.SelectNodes("//LegendLabel");
// Find the correct node and change it
foreach (XmlNode node in nodes)
{
if (node.InnerText == "Built after 1950")
{
node.InnerText = "Built after 1980";
}
}
//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[] layerDefinition = ms.ToArray();
Encoding utf8 = Encoding.UTF8;
String layerDefStr = new String(utf8.GetChars(layerDefinition));
layerDefinition = new byte[layerDefStr.Length - 1];
int byteCount = utf8.GetBytes(layerDefStr, 1, layerDefStr.Length - 1, layerDefinition, 0);
// Save the new layer definition to the session repository
MgByteSource byteSource = new MgByteSource(layerDefinition, layerDefinition.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;
}
//Turn off square footage if it exists
if (layers.IndexOf("SquareFootage") >= 0)
{
MgLayerBase layer = layers.GetItem("SquareFootage");
layer.SetVisible(false);
}
MessageBox.Show("Layer (" + layerName + ") created");
_viewer.RefreshMap();
IMapLegend legend = Shell.Instance.Legend;
if (legend != null)
{
legend.RefreshLegend();
}
}
}
private void btnCreateHydroLine_Click(object sender, EventArgs e)
{
string layerName = "Hydro";
string legendLabel = "Hydro";
string groupName = "Analysis";
MgMapViewerProvider provider = _viewer.GetProvider();
MgResourceService resourceService = (MgResourceService)provider.CreateService(MgServiceType.ResourceService);
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 new layer
LayerDefinitionFactory factory = new LayerDefinitionFactory();
// Create a line rule.
String ruleLegendLabel = "";
String filter = "";
String color = "FF0000FF";
String lineRule = factory.CreateLineRule(ruleLegendLabel, filter, color);
// Create a line type style.
String lineTypeStyle = factory.CreateLineTypeStyle(lineRule);
// Create a scale range.
String minScale = "0";
String maxScale = "1000000000000";
String lineScaleRange = factory.CreateScaleRange(minScale, maxScale, lineTypeStyle);
// Create the layer definiton.
String featureClass = "Library://Samples/Sheboygan/Data/HydrographicLines.FeatureSource";
String featureName = "SHP_Schema:HydrographicLines";
String geometry = "SHPGEOM";
String layerDefinition = factory.CreateLayerDefinition(featureClass, featureName, geometry, lineScaleRange);
//---------------------------------------------------//
// ...
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();
}
}
}