Latest Contributions by Jan-Tschada

We do not really understand why the implemented geometries (Point, Envelope, Polygon and so on) do not have a spatial reference. For each spatial operation on geometries you have to know the spatial reference of each. So we come up with defining our on class wrapping the geometry implementation and offering the access to the corresponding spatial reference. public class SpatialGeometry { private final Geometry geometry; private final SpatialReference spatialReference; public SpatialGeometry(Geometry geometry, SpatialReference spatialReference) {   this.geometry = geometry;   this.spatialReference = spatialReference; } public static SpatialGeometry createWgs84Geometry(Geometry geometry) {   return new SpatialGeometry(geometry, SpatialReference.create(SpatialReferenceCode.Wgs84.getCode())); } . . . public Geometry getGeometry() {   return geometry; } public SpatialReference getSpatialReference() {   return spatialReference; } } It would be nice to get some feedback why the geometries are implemented without having a spatial reference. ... View more

Is it possible to deactivate the mouse motion and key events on the JMap by simple setting a flag? For instance, if someone tries to develop a custom tool which creates graphics on the map by clicking on it, the map still listen and reacts to the mouse motion events. If the user click on the map and drags the mouse a little bit the map extent changes unintentually. This is not a nice user experience. Right now, we are removing the mouse, mouse motion, mouse wheel listener and the action map from the JMap instance. Create for each instance a decorator (offering setActivated) and add these decorated listeners back to the JMap instance. If the custom tool is active the decorators are deactivated and the user can create graphics by clicking on the map. E.g. MouseMotionListenerDecorator public class MouseMotionListenerDecorator implements MouseMotionListener { private final MouseMotionListener mouseMotionListener; private boolean activated = true; public MouseMotionListenerDecorator(MouseMotionListener mouseMotionListener) {   this.mouseMotionListener = mouseMotionListener; } public boolean isActivated() {   return activated; } public void setActivated(boolean activated) {   this.activated = activated; } @Override public void mouseDragged(MouseEvent e) {   if (!isActivated())    return;   mouseMotionListener.mouseDragged(e); } @Override public void mouseMoved(MouseEvent e) {   if (!isActivated())    return;   mouseMotionListener.mouseMoved(e); } } Is there any better way by using the API? Thank you ... View more

As far as I can judge it the .NET Wrapper is implemented using C++/CLI. This means that each "managed class" has a finalizer (e.g. Table::!Table) and from a C# perspective this class implements IDisposable. The finalizer is mainly used for releasing unmanaged resources. Taking a look at the core API the "valid state" of a Table is manged by using Geodatabase::OpenTable and Geodatabase::CloseTable. This means the managed Table instance must have a reference to the corresponding Geodatabase instance. I believe that the finalizer Table::!Table always tries to use this Geodatabase instance. This can lead to an ObjectDisposedException when the Geodatabase instance was already disposed by the developer or by the "Garbage Collector" (brain bug). I can reproduce this by using the follwing code snippet: internal static void DisposeGeodatabase(string path, string tableName) { Geodatabase geodatabase = Geodatabase.Open(path); try {   Table table = geodatabase.OpenTable(tableName);   try   {    Console.WriteLine(table.RowCount);   }   finally   {    table.Close();    // Not disposing the table leads to an ObjectDisposedException in the finalizer (Table::!Table())    //table.Dispose();   } } finally {   geodatabase.Close();   // The geodatabase must not be disposed!   geodatabase.Dispose(); } } If this is true, any developer have to take care about this fact. The easiest way could be a combination of the using directive and a kind of visitor implementation. Like the following snippet shows: private static void Apply(string path, Action<Geodatabase> strategy) { using (Geodatabase geodatabase = Geodatabase.Open(path)) {   try   {    strategy(geodatabase);   }   finally   {    geodatabase.Close();   } } } I put some effort in this kind of workaround and designed some "helper classes" which can be combined using lambdas. The following snippet shows how to iterate through all rows of a table. You can modify the RowCollectionStrategy to obtain a specific subset of the table. internal static void IterateAllRows(string path, string tableName) { GeodatabaseStrategy geodatabaseStrategy = new GeodatabaseStrategy(path); geodatabaseStrategy.Apply((geodatabase) => {   TableStrategy tableStrategy = new TableStrategy(geodatabase, tableName);   tableStrategy.Apply((table) =>   {    long count = DetermineAccessibleRows(table);    Console.WriteLine("{0} rows of table '{1}' processed", count, tableName);   }); }); } private static long DetermineAccessibleRows(Table table) { RowCollectionStrategy rowCollectionStrategy = RowCollectionStrategy.CreateRecycleAll(table); long count = 0; rowCollectionStrategy.Apply((rows) => {   foreach (Row row in rows)   {    count++;   } }); return count; } Would you be so kind and try to investigate if this unexpected "Dispose behaviour" is correct. This prototype workaround implementation (all the sample data is not included) can be obtained by: SourceForge ... View more

Using the Beta 3 version of the File Geodatabase API for Windows the IFields struct seems to be only forward declarated. Steps to reproduce: Include "Util.h" and try to compile. Compiler error: IFields missing identifier Could it be, that this header file is for internal use only? Thanks in advance ... View more