Smrf.NodeXL.ExcelTemplate.SubgraphImageCreator.CreateSubgraphImagesInternal C# (CSharp) Method

    CreateSubgraphImagesInternal
    (
        CreateSubgraphImagesAsyncArgs oCreateSubgraphImagesAsyncArgs,
        BackgroundWorker oBackgroundWorker,
        DoWorkEventArgs oDoWorkEventArgs
    )
    {
        Debug.Assert(oCreateSubgraphImagesAsyncArgs != null);
        Debug.Assert(oBackgroundWorker != null);
        Debug.Assert(oDoWorkEventArgs != null);
        AssertValid();

        // Create an object to keep track of the thumbnail images this method
        // creates and stores in a temporary folder.

        TemporaryImages oThumbnailImages = new TemporaryImages();

        oThumbnailImages.ImageSizePx =
            oCreateSubgraphImagesAsyncArgs.ThumbnailSizePx;

        oDoWorkEventArgs.Result = oThumbnailImages;

        ICollection<IVertex> oVertices;

        if (oCreateSubgraphImagesAsyncArgs.SelectedVerticesOnly)
        {
            oVertices = oCreateSubgraphImagesAsyncArgs.SelectedVertices;
        }
        else
        {
            oVertices = oCreateSubgraphImagesAsyncArgs.Graph.Vertices;
        }

        Int32 iSubgraphsCreated = 0;

        Boolean bSaveToFolder = oCreateSubgraphImagesAsyncArgs.SaveToFolder;

        Boolean bCreateThumbnails =
            oCreateSubgraphImagesAsyncArgs.CreateThumbnails;

        if (bSaveToFolder || bCreateThumbnails)
        {
            foreach (IVertex oVertex in oVertices)
            {
                if (oBackgroundWorker.CancellationPending)
                {
                    if (oThumbnailImages.Folder != null)
                    {
                        // Delete the entire temporary folder.

                        Directory.Delete(oThumbnailImages.Folder, true);

                        oThumbnailImages.Folder = null;
                    }

                    oDoWorkEventArgs.Cancel = true;
                    break;
                }

                String sVertexName = oVertex.Name;

                oBackgroundWorker.ReportProgress(0,
                    String.Format(
                        "Creating subgraph image for \"{0}\"."
                        ,
                        sVertexName
                    ) );

                // Create a subgraph for the vertex.

                IGraph oSubgraph = CreateSubgraph(oVertex,
                    oCreateSubgraphImagesAsyncArgs);

                // Create and save images for the subgraph.

                CreateAndSaveSubgraphImages(oSubgraph, sVertexName,
                    oCreateSubgraphImagesAsyncArgs, oThumbnailImages);

                iSubgraphsCreated++;
            }
        }

        oBackgroundWorker.ReportProgress(0,
            String.Format(
                "Done.  Created {0} subgraph {1}."
                ,
                iSubgraphsCreated.ToString(ExcelTemplateForm.Int32Format),
                StringUtil.MakePlural("image", iSubgraphsCreated)
                ) );
    }