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

    CreateSubgraphImagesAsync
    (
        IGraph graph,
        ICollection<IVertex> selectedVertices,
        Decimal levels,
        Boolean saveToFolder,
        String folder,
        Size imageSizePx,
        ImageFormat imageFormat,
        Boolean createThumbnails,
        Size thumbnailSizePx,
        Boolean selectedVerticesOnly,
        Boolean selectVertex,
        Boolean selectIncidentEdges,
        GeneralUserSettings generalUserSettings,
        LayoutUserSettings layoutUserSettings
    )
    {
        Debug.Assert(graph != null);
        Debug.Assert(selectedVertices != null);
        Debug.Assert(levels >= 0);
        Debug.Assert(Decimal.Remainder(levels, 0.5M) == 0M);
        Debug.Assert( !saveToFolder || !String.IsNullOrEmpty(folder) );
        Debug.Assert( !saveToFolder || imageSizePx.Width > 0);
        Debug.Assert( !saveToFolder || imageSizePx.Height > 0);
        Debug.Assert( !createThumbnails || thumbnailSizePx.Width > 0);
        Debug.Assert( !createThumbnails || thumbnailSizePx.Height > 0);
        Debug.Assert(generalUserSettings != null);
        AssertValid();

        const String MethodName = "CreateSubgraphImagesAsync";

        if (this.IsBusy)
        {
            throw new InvalidOperationException( String.Format(

                "{0}:{1}: An asynchronous operation is already in progress."
                ,
                this.ClassName,
                MethodName
                ) );
        }

        // Wrap the arguments in an object that can be passed to
        // BackgroundWorker.RunWorkerAsync().

        CreateSubgraphImagesAsyncArgs oCreateSubgraphImagesAsyncArgs =
            new CreateSubgraphImagesAsyncArgs();

        oCreateSubgraphImagesAsyncArgs.Graph = graph;
        oCreateSubgraphImagesAsyncArgs.SelectedVertices = selectedVertices;
        oCreateSubgraphImagesAsyncArgs.Levels = levels;
        oCreateSubgraphImagesAsyncArgs.SaveToFolder = saveToFolder;
        oCreateSubgraphImagesAsyncArgs.Folder = folder;
        oCreateSubgraphImagesAsyncArgs.ImageSizePx = imageSizePx;
        oCreateSubgraphImagesAsyncArgs.ImageFormat = imageFormat;
        oCreateSubgraphImagesAsyncArgs.CreateThumbnails = createThumbnails;
        oCreateSubgraphImagesAsyncArgs.ThumbnailSizePx = thumbnailSizePx;

        oCreateSubgraphImagesAsyncArgs.SelectedVerticesOnly =
            selectedVerticesOnly;

        oCreateSubgraphImagesAsyncArgs.SelectVertex = selectVertex;

        oCreateSubgraphImagesAsyncArgs.SelectIncidentEdges =
            selectIncidentEdges;

        oCreateSubgraphImagesAsyncArgs.GeneralUserSettings =
            generalUserSettings;

        oCreateSubgraphImagesAsyncArgs.Layout =
            CreateLayout(layoutUserSettings);

        oCreateSubgraphImagesAsyncArgs.Layout.Margin = Margin;

        // Note: the NodeXLVisual object can't be created yet, because it must
        // be created on the same thread that uses it.  It will get created by
        // BackgroundWorker_DoWork().

        oCreateSubgraphImagesAsyncArgs.NodeXLVisual = null;

        // Create a BackgroundWorker and handle its events.

        m_oBackgroundWorker = new BackgroundWorker();

        m_oBackgroundWorker.WorkerReportsProgress = true;
        m_oBackgroundWorker.WorkerSupportsCancellation = true;

        m_oBackgroundWorker.DoWork += new DoWorkEventHandler(
            BackgroundWorker_DoWork);

        m_oBackgroundWorker.ProgressChanged +=
            new ProgressChangedEventHandler(BackgroundWorker_ProgressChanged);

        m_oBackgroundWorker.RunWorkerCompleted +=
            new RunWorkerCompletedEventHandler(
                BackgroundWorker_RunWorkerCompleted);

        m_oBackgroundWorker.RunWorkerAsync(oCreateSubgraphImagesAsyncArgs);
    }