private async void QueryMapAreas()
{
try
{
// Clear existing overlays
_mapViewService.ClearOverlays();
// Clear existing areas (in case user wants to refresh results)
MapAreas.Clear();
// Create new task to
var offlineMapTask = await OfflineMapTask.CreateAsync(Map);
// Get list of areas
IReadOnlyList <PreplannedMapArea> preplannedMapAreas = await offlineMapTask.GetPreplannedMapAreasAsync();
// Create UI from the areas
foreach (var preplannedMapArea in preplannedMapAreas.OrderBy(x => x.PortalItem.Title))
{
// Load area to get the metadata
await preplannedMapArea.LoadAsync();
// Using a custom model for easier visualization
var model = new MapAreaModel(preplannedMapArea);
MapAreas.Add(model);
// Graphic that shows the area in the map
var graphic = new Graphic(preplannedMapArea.AreaOfInterest, GetSymbolForColor(model.DisplayColor));
graphic.Attributes.Add("Name", preplannedMapArea.PortalItem.Title);
_areasOverlay.Graphics.Add(graphic);
}
if (!preplannedMapAreas.Any())
{
await _windowService.ShowAlertAsync("No preplanned map areas available.");
}
else
{
// Show the overlays on the map
_mapViewService.AddGraphicsOverlay(_areasOverlay);
// Zoom to the offline areas
await _mapViewService.SetViewpointGeometryAsync(_areasOverlay.Extent, 20);
}
// Refresh commands
RefreshCommands();
}
catch (Exception ex)
{
await _windowService.ShowAlertAsync(ex.Message, "Couldn't query map areas");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="WorldLOD"/> class.
/// </summary>
/// <param name="inData">The input data.</param>
public WorldLOD(byte[] inData)
{
using (var ms = new MemoryStream(inData))
{
using (var br = new BinaryReader(ms))
{
// Set up the two area lists with default values
for (var i = 0; i < 4096; ++i)
{
MapAreas.Add(null);
MapAreaHoles.Add(null);
}
Version = br.ReadIFFChunk <TerrainVersion>();
if (br.PeekChunkSignature() == TerrainWorldModelObjects.Signature)
{
WorldModelObjects = br.ReadIFFChunk <TerrainWorldModelObjects>();
}
if (br.PeekChunkSignature() == TerrainWorldModelObjectIndices.Signature)
{
WorldModelObjectIndices = br.ReadIFFChunk <TerrainWorldModelObjectIndices>();
}
if (br.PeekChunkSignature() == TerrainWorldModelObjectPlacementInfo.Signature)
{
WorldModelObjectPlacementInfo = br.ReadIFFChunk <TerrainWorldModelObjectPlacementInfo>();
}
MapAreaOffsets = br.ReadIFFChunk <WorldLODMapAreaOffsets>();
// Read the map areas and their holes
for (var y = 0; y < 64; ++y)
{
for (var x = 0; x < 64; ++x)
{
var mapAreaOffsetIndex = (y * 64) + x;
var mapAreaOffset = MapAreaOffsets.MapAreaOffsets[mapAreaOffsetIndex];
if (mapAreaOffset > 0)
{
br.BaseStream.Position = mapAreaOffset;
MapAreas[mapAreaOffsetIndex] = br.ReadIFFChunk <WorldLODMapArea>();
if (br.PeekChunkSignature() == WorldLODMapAreaHoles.Signature)
{
MapAreaHoles[mapAreaOffsetIndex] = br.ReadIFFChunk <WorldLODMapAreaHoles>();
}
else
{
MapAreaHoles[mapAreaOffsetIndex] = WorldLODMapAreaHoles.CreateEmpty();
}
}
else
{
MapAreas[mapAreaOffsetIndex] = null;
MapAreaHoles[mapAreaOffsetIndex] = null;
}
}
}
}
}
}
