/// <summary>
/// Iterates through the layers of the map and builds a tree based on the layer information
/// </summary>
/// <param name="ds"></param>
/// <returns>"TreeNode"</returns>
///
public static TreeNode CreateTree()
{
DebugUtil.WriteLine();
DebugUtil.WriteLine("*******************************************************************************************************");
DebugUtil.WriteLine("**** Building Tree ****");
DebugUtil.WriteLine("*******************************************************************************************************");
DebugUtil.WriteLine();
TreeNode topNode = new TreeNode();
TreeNode metaTree = new TreeNode();
Layer layer;
string srs_wkt;
Envelope thisEnvelope = new Envelope();
string coordinateString;
// add the name of the chart as the name of this root
topNode.Text = Path.GetFileName(ds.name);
topNode.Name = Path.GetFileName(ds.name);
// Meta Tree
metaTree.Text = "Meta Data";
metaTree.Name = "Meta Data";
// get layer 0 (should be "DSID) for the meta data
layer = ds.GetLayerByIndex(0);
/* -------------------------------------------------------------------- */
/* Get the spatial reference. It is consistent for the entire map so we*/
/* only need to do it once. */
/* -------------------------------------------------------------------- */
OSGeo.OSR.SpatialReference sr = layer.GetSpatialRef();
// this should not be null
if (sr != null)
{
sr.ExportToPrettyWkt(out srs_wkt, 1);
TreeUtil.AddChildNode(metaTree, "Spatial Reference", srs_wkt);
DebugUtil.WriteLine("Spatial Reference: " + srs_wkt);
}
else
{
TreeUtil.AddChildNode(metaTree, "Spatial Reference", "Spatial Reference Uknown");
srs_wkt = "SRS: Unknown.";
}
// get Envelope for this layer
layer.GetExtent(thisEnvelope, 1);
// Get the Extents for the map. Again, they are consistent for the entire map, so we only need to do this once.
if (thisEnvelope != null)
{
coordinateString = String.Format("MaxX = {0}, MaxY = {1}, MinX = {2}, MinY = {3}.", thisEnvelope.MaxX, thisEnvelope.MaxY, +thisEnvelope.MinX, thisEnvelope.MinY);
DebugUtil.WriteLine("Extents: " + coordinateString);
TreeUtil.AddChildNode(metaTree, "Envelope: ", coordinateString);
}
// add metaTree to topNode
topNode.Nodes.Add(metaTree);
// go through all the layers starting at zero
for (int i = 0; i < ds.GetLayerCount(); i++)
{
layer = ds.GetLayerByIndex(i);
if (layer != null)
{
// most of the work is done here
CreateTreeLayers(topNode, layer, i);
}
else
{
DebugUtil.WriteLine("*********** Critical Error *************");
DebugUtil.WriteLine("Layer: " + i + " is null and does not exist.");
MessageBox.Show("Critical Error: " + "Layer: " + i + " is null and does not exist.");
}
}
DebugUtil.WriteLine(" TopNode node count is " + topNode.Nodes.Count + ".");
// save the tree to a file. this is controlled by the debug flags. note that the file can get very large
TreeUtil.OpenPrintRecursive("TreeNode.txt");
TreeUtil.PrintRecursive(topNode);
// close the debug files
DebugUtil.Close();
TreeUtil.Close();
return(topNode);
}
private void S57MapForm_Closing()
{
DebugUtil.Close();
}