/// <summary>
/// Selects all of the features whose centroids lie within a given polygon.
/// </summary>
/// <remarks>This method searches for all features whose centroids are within the given polygon and updates the
/// default selection.</remarks>
/// <param name="mapAlias">MapAlias of the map.</param>
/// <param name="points">Array of points forming the polygon.</param>
public virtual void PolygonSelection(string mapAlias, System.Drawing.Point[] points)
{
Map map = GetMapObj(mapAlias);
// Convert them to map coordinates
MapInfo.Geometry.DPoint [] dpnts = new MapInfo.Geometry.DPoint[points.Length];
for (int indx = 0; indx < points.Length; indx++)
{
map.DisplayTransform.FromDisplay(points[indx], out dpnts[indx]);
}
// Create a polygon from these points
CoordSys dispCSys = map.GetDisplayCoordSys();
CoordSys geomCSys =
Session.Current.CoordSysFactory.CreateCoordSys(dispCSys.Type, dispCSys.Datum, dispCSys.Units, dispCSys.OriginLongitude, dispCSys.OriginLatitude, dispCSys.StandardParallelOne, dispCSys.StandardParallelTwo, dispCSys.Azimuth, dispCSys.ScaleFactor, dispCSys.FalseEasting, dispCSys.FalseNorthing, dispCSys.Range, map.Layers.Bounds, dispCSys.AffineTransform);
MapInfo.Geometry.MultiPolygon mp = new MapInfo.Geometry.MultiPolygon(geomCSys, MapInfo.Geometry.CurveSegmentType.Linear, dpnts);
// Search and select
SearchInfo si = MapInfo.Data.SearchInfoFactory.SearchWithinGeometry(mp, ContainsType.Centroid);
Session.Current.Selections.DefaultSelection.Clear();
IMapLayerFilter _selFilter = MapLayerFilterFactory.FilterForTools(
map, MapLayerFilterFactory.FilterByLayerType(LayerType.Normal), MapLayerFilterFactory.FilterVisibleLayers(true),
"MapInfo.Tools.MapToolsDefault.SelectLayers", null);
ITableEnumerator table = map.Layers.GetTableEnumerator(_selFilter);
if (table != null) // null will be returned is select enabled layer is not visible, thus non-selectable
{
Session.Current.Catalog.Search(table, si, Session.Current.Selections.DefaultSelection, ResultSetCombineMode.AddTo);
}
}
/// <summary>
/// Select all features in all visible and selectable layers near a given point using a given pixel tolerance.
/// </summary>
/// <remarks>This method searches all features near a given point in all visible and selectable layers and then updates the
/// default selection.
/// </remarks>
/// <param name="mapAlias">MapAlias of the map.</param>
/// <param name="point">Point in pixels.</param>
/// <param name="pixelTolerance">Pixel tolerance.</param>
public void PointSelection(string mapAlias, System.Drawing.Point point, int pixelTolerance)
{
Map map = GetMapObj(mapAlias);
// Do the search and show selections
SearchInfo si = MapInfo.Mapping.SearchInfoFactory.SearchNearest(map, point, pixelTolerance);
(si.SearchResultProcessor as ClosestSearchResultProcessor).Options = ClosestSearchOptions.StopAtFirstMatch;
MapInfo.Geometry.Distance d = MapInfo.Mapping.SearchInfoFactory.ScreenToMapDistance(map, pixelTolerance);
(si.SearchResultProcessor as ClosestSearchResultProcessor).DistanceUnit = d.Unit;
(si.SearchResultProcessor as ClosestSearchResultProcessor).MaxDistance = d.Value;
Session.Current.Selections.DefaultSelection.Clear();
IMapLayerFilter _selFilter = MapLayerFilterFactory.FilterForTools(
map, MapLayerFilterFactory.FilterByLayerType(LayerType.Normal), MapLayerFilterFactory.FilterVisibleLayers(true),
"MapInfo.Tools.MapToolsDefault.SelectLayers", null);
ITableEnumerator table = map.Layers.GetTableEnumerator(_selFilter);
if (table != null) // null will be returned is select enabled layer is not visible, thus non-selectable
{
Session.Current.Catalog.Search(table, si, Session.Current.Selections.DefaultSelection, ResultSetCombineMode.AddTo);
}
}
private void DeletePieTheme()
{
// Remove previous themes:
MapLayerEnumerator e = mapControl1.Map.Layers.GetMapLayerEnumerator(MapLayerFilterFactory.FilterByType(typeof(ObjectThemeLayer)));
while (e.MoveNext())
{
mapControl1.Map.Layers.Remove(e.Current);
e = mapControl1.Map.Layers.GetMapLayerEnumerator(MapLayerFilterFactory.FilterByType(typeof(ObjectThemeLayer)));
}
}
/// <summary>
/// Get a MultiFeatureCollection containing features in all layers falling into the tolerance of the point.
/// </summary>
/// <param name="points">points array</param>
/// <param name="pixelTolerance">pixel tolerance used when searching</param>
/// <returns>Returns a MultiResultSetFeatureCollection object</returns>
protected MultiResultSetFeatureCollection RetrieveInfo(Point[] points, int pixelTolerance)
{
if (points.Length != 1)
{
return(null);
}
MapControlModel model = MapControlModel.GetModelFromSession();
//get map object from map model
MapInfo.Mapping.Map map = model.GetMapObj(MapAlias);
if (map == null)
{
return(null);
}
//creat a layer filter to include normal visible layers for searching
IMapLayerFilter layerFilter = MapLayerFilterFactory.FilterForTools(
map, MapLayerFilterFactory.FilterByLayerType(LayerType.Normal), MapLayerFilterFactory.FilterVisibleLayers(true),
"MapInfo.Tools.MapToolsDefault.SelectLayers", null);
ITableEnumerator tableEnum = map.Layers.GetTableEnumerator(layerFilter);
//return if there is no valid layer to search
if (tableEnum == null)
{
return(null);
}
System.Drawing.Point center = points[0];
//create a SearchInfo with a point and tolerance
SearchInfo si = MapInfo.Mapping.SearchInfoFactory.SearchNearest(map, center, pixelTolerance);
(si.SearchResultProcessor as ClosestSearchResultProcessor).Options = ClosestSearchOptions.StopAtFirstMatch;
//retrieve all columns
si.QueryDefinition.Columns = null;
MapInfo.Geometry.Distance d = MapInfo.Mapping.SearchInfoFactory.ScreenToMapDistance(map, pixelTolerance);
(si.SearchResultProcessor as ClosestSearchResultProcessor).DistanceUnit = d.Unit;
(si.SearchResultProcessor as ClosestSearchResultProcessor).MaxDistance = d.Value;
//do search
MultiResultSetFeatureCollection mrfc = MapInfo.Engine.Session.Current.Catalog.Search(tableEnum, si);
return(mrfc);
}
/// <summary>
/// Selects all feature within a given radius.
/// </summary>
/// <remarks>This method searches for all features whose centroids are within the given radius and updates the
/// default selection.</remarks>
/// <param name="mapAlias">MapAlias of the map.</param>
/// <param name="center">Center of the circle.</param>
/// <param name="radius">Radius of the circle.</param>
public virtual void RadiusSelection(string mapAlias, System.Drawing.Point center, int radius)
{
Map map = GetMapObj(mapAlias);
SearchInfo si = MapInfo.Mapping.SearchInfoFactory.SearchWithinScreenRadius(map, center, radius, 20, ContainsType.Centroid);
Session.Current.Selections.DefaultSelection.Clear();
IMapLayerFilter _selFilter = MapLayerFilterFactory.FilterForTools(
map, MapLayerFilterFactory.FilterByLayerType(LayerType.Normal), MapLayerFilterFactory.FilterVisibleLayers(true),
"MapInfo.Tools.MapToolsDefault.SelectLayers", null);
ITableEnumerator table = map.Layers.GetTableEnumerator(_selFilter);
if (table != null) // null will be returned is select enabled layer is not visible, thus non-selectable
{
Session.Current.Catalog.Search(table, si, Session.Current.Selections.DefaultSelection, ResultSetCombineMode.AddTo);
}
}
/// <summary>
/// Selects all features within a given rectangle.
/// </summary>
/// <remarks>This method searches for all features whose centroids are within the given rectangle and updates the
/// default selection.</remarks>
/// <param name="mapAlias">MapAlias of the map.</param>
/// <param name="point1">First corner of the rectangle.</param>
/// <param name="point2">Second corner of the rectangle.</param>
public virtual void RectangleSelection(string mapAlias, System.Drawing.Point point1, System.Drawing.Point point2)
{
Map map = GetMapObj(mapAlias);
System.Drawing.Rectangle rect = new System.Drawing.Rectangle(point1.X, point1.Y, 0, 0);
rect.Width = Math.Abs(point2.X - point1.X);
rect.Height = Math.Abs(point2.Y - point1.Y);
// Do the search and show selections
SearchInfo si = MapInfo.Mapping.SearchInfoFactory.SearchWithinScreenRect(map, rect, ContainsType.Centroid);
Session.Current.Selections.DefaultSelection.Clear();
IMapLayerFilter _selFilter = MapLayerFilterFactory.FilterForTools(
map, MapLayerFilterFactory.FilterByLayerType(LayerType.Normal), MapLayerFilterFactory.FilterVisibleLayers(true),
"MapInfo.Tools.MapToolsDefault.SelectLayers", null);
ITableEnumerator table = map.Layers.GetTableEnumerator(_selFilter);
if (table != null) // null will be returned is select enabled layer is not visible, thus non-selectable
{
Session.Current.Catalog.Search(table, si, Session.Current.Selections.DefaultSelection, ResultSetCombineMode.AddTo);
}
}
/// <summary>
/// Select all feature with given radius but ones selected by the center point.
/// </summary>
/// <remarks>This method searches for all features whose centroids are within the given radius but ones selected by the center point and updates the
/// default selection. This method will clear DefaultSelection if radius is 0 or only one click happened in client side.</remarks>
/// <param name="mapAlias">MapAlias of the map</param>
/// <param name="myMap">Map object</param>
private void RadiusSelection(Map myMap, System.Drawing.Point[] points)
{
Session.Current.Selections.DefaultSelection.Clear();
// just return if it is one point only or first and second points are same.
if (points.Length == 1 || points[0] == points[1])
{
return;
}
IMapLayerFilter _selFilter = MapLayerFilterFactory.FilterForTools(
myMap, MapLayerFilterFactory.FilterByLayerType(LayerType.Normal), MapLayerFilterFactory.FilterVisibleLayers(true),
"MapInfo.Tools.MapToolsDefault.SelectLayers", null);
// alias for temp selection object.
string tempAlias = "tempSelection";
ITableEnumerator iTableEnum = myMap.Layers.GetTableEnumerator(_selFilter);
if (iTableEnum != null)
{
try
{
// Get center and radius
System.Drawing.Point center = points[0];
int radius = points[1].X;
// search within screen radius.
SearchInfo si = MapInfo.Mapping.SearchInfoFactory.SearchWithinScreenRadius(myMap, center, radius, 20, ContainsType.Centroid);
Session.Current.Catalog.Search(iTableEnum, si, Session.Current.Selections.DefaultSelection, ResultSetCombineMode.AddTo);
// Create the temp selection object.
Session.Current.Selections.CreateSelection(tempAlias);
// Search nearest the center point.
si = MapInfo.Mapping.SearchInfoFactory.SearchNearest(myMap, center, 6);
Session.Current.Catalog.Search(iTableEnum, si, Session.Current.Selections[tempAlias], ResultSetCombineMode.AddTo);
// Subtract radius selected features from point selected features.
IEnumerator iEnum = Session.Current.Selections[tempAlias].GetEnumerator();
while (iEnum.MoveNext())
{
IResultSetFeatureCollection pntCollection = iEnum.Current as IResultSetFeatureCollection;
IResultSetFeatureCollection radiusCollection = null;
for (int index = 0; index < Session.Current.Selections.DefaultSelection.Count; index++)
{
// Need to find out the IResultSetFeatureCollection based on the same BaseTable.
if (Session.Current.Selections.DefaultSelection[index].BaseTable.Alias == pntCollection.BaseTable.Alias)
{
radiusCollection = Session.Current.Selections.DefaultSelection[index];
break;
}
}
if (radiusCollection != null)
{
// Remove features in pntCollection from radiusCollection.
radiusCollection.Remove(pntCollection);
}
}
}
catch (Exception)
{
Session.Current.Selections.DefaultSelection.Clear();
}
finally
{
Session.Current.Selections.Remove(Session.Current.Selections[tempAlias]);
}
}
}
