Excelチャートの作成とOLEオブジェクトとしてプレゼンテーションに埋め込む

必要な手順

ExcelチャートをOLEオブジェクトとしてPowerPointスライドに作成および埋め込むために必要な手順は次のとおりです:

  1. Aspose.Cells for C++を使用してExcelチャートを作成します。
  2. Aspose.Cells for C++を使用してExcelチャートのOLEサイズを設定します。
  3. Aspose.Cells for C++を使用してExcelチャートの画像を取得します。
  4. Aspose.Slides for C++を使用してPPTXプレゼンテーション内にOLEオブジェクトとしてExcelチャートを埋め込みます。
  5. オブジェクトの変更問題に対応するために、ステップ3で取得した画像でオブジェクト変更画像を置き換えます。
  6. 出力プレゼンテーションをPPTX形式でディスクに書き込みます。

必要な手順の実装

上記の手順をC++で実装する方法は以下のとおりです:

//Step - 1: Create an excel chart using Aspose.Cells
//--------------------------------------------------
//Create a workbook
intrusive_ptr<Aspose::Cells::IWorkbook> wb = Aspose::Cells::Factory::CreateIWorkbook();
//Add an excel chart
int32_t chartRows = 55;
int32_t chartCols = 25;
int32_t chartSheetIndex = AddExcelChartInWorkbook(wb, chartRows, chartCols);
//Step - 2: Set the OLE size of the chart. using Aspose.Cells
//----------------------------------------------------------- 
wb->GetIWorksheets()->SetOleSize(0, chartRows, 0, chartCols);
//Step - 3: Get the image of the chart with Aspose.Cells
//----------------------------------------------------------- 
//System::SharedPtr<System::Drawing::Bitmap>
auto imgChart = wb->GetIWorksheets()->GetObjectByIndex(chartSheetIndex)->GetICharts()->GetObjectByIndex(0)->ToImage();
//Save the workbook to stream
System::SharedPtr<System::IO::MemoryStream> wbStream = ToSlidesMemoryStream(wb->SaveToStream());
//Step - 4  AND 5
//----------------------------------------------------------- 
//Step - 4: Embed the chart as an OLE object inside .ppt presentation using Aspose.Slides
//----------------------------------------------------------- 
//Step - 5: Replace the object changed image with the image obtained in step 3 to cater Object Changed Issue
//----------------------------------------------------------- 
//Create a presentation
System::SharedPtr<Presentation> pres = System::MakeObject<Presentation>();
System::SharedPtr<ISlide> slide = pres->get_Slides()->idx_get(0);

// Add the workbook on slide
AddExcelChartInPresentation(pres, slide, wbStream, imgChart);

//Step - 6: Write the output presentation on disk
//----------------------------------------------------------- 
pres->Save(u"d:/OutputChart.pptx", SaveFormat::Pptx);
void AddExcelChartInPresentation(System::SharedPtr<Presentation> pres, System::SharedPtr<ISlide> sld, 
                                    System::SharedPtr<System::IO::Stream> wbStream, 
                                    intrusive_ptr<Aspose::Cells::Systems::Drawing::Bitmap> imgChart)
{
    float oleWidth = pres->get_SlideSize()->get_Size().get_Width();
    float oleHeight = pres->get_SlideSize()->get_Size().get_Height();
    int32_t x = 0;
    System::ArrayPtr<uint8_t> chartOleData = System::MakeArray<uint8_t>(wbStream->get_Length(), 0);
    wbStream->set_Position(0);
    wbStream->Read(chartOleData, 0, chartOleData->get_Length());

    System::SharedPtr<OleEmbeddedDataInfo> dataInfo = System::MakeObject<OleEmbeddedDataInfo>(chartOleData, u"xls");
    System::SharedPtr<IOleObjectFrame> oof;
    oof = sld->get_Shapes()->AddOleObjectFrame(static_cast<float>(x), 0.0f, oleWidth, oleHeight, dataInfo);

    intrusive_ptr<MemoryStream> cellsOutputStream = new Aspose::Cells::Systems::IO::MemoryStream();
    imgChart->Save(cellsOutputStream, Aspose::Cells::Systems::Drawing::Imaging::ImageFormat::GetBmp());

    auto imgChartSlides = Images::FromStream(ToSlidesMemoryStream(cellsOutputStream));
    oof->get_SubstitutePictureFormat()->get_Picture()->set_Image(pres->get_Images()->AddImage(imgChartSlides));
}
System::SharedPtr<System::IO::MemoryStream> ToSlidesMemoryStream(intrusive_ptr<Aspose::Cells::Systems::IO::MemoryStream> inputStream)
{
    System::ArrayPtr<uint8_t> outputBuffer = System::MakeArray<uint8_t>(inputStream->GetLength(), inputStream->GetBuffer()->ArrayPoint());
    auto outputStream = System::MakeObject<System::IO::MemoryStream>(outputBuffer);

    return outputStream;
}
int32_t AddExcelChartInWorkbook(intrusive_ptr<Aspose::Cells::IWorkbook> wb, int32_t chartRows, int32_t chartCols)
{
    // Array of cell names
    System::ArrayPtr<System::String> cellsName = System::MakeArray<System::String>(
        { u"A1", u"A2", u"A3", u"A4", 
            u"B1", u"B2", u"B3", u"B4",
            u"C1", u"C2", u"C3", u"C4",
            u"D1", u"D2", u"D3", u"D4",
            u"E1", u"E2", u"E3", u"E4" });
    
    // Array of cell data
    System::ArrayPtr<int32_t> cellsValue = System::MakeArray<int32_t>(
        { 67, 86, 68, 91,
            44, 64, 89, 48,
            46, 97, 78, 60,
            43, 29, 69, 26,
            24, 40, 38, 25 });

    // Add a new worksheet to populate cells with data
    int32_t dataSheetIdx = wb->GetIWorksheets()->Add();
    intrusive_ptr<Aspose::Cells::IWorksheet> dataSheet = wb->GetIWorksheets()->GetObjectByIndex(dataSheetIdx);
    intrusive_ptr<Aspose::Cells::Systems::String> sheetName = new Aspose::Cells::Systems::String("DataSheet");
    dataSheet->SetName(sheetName);

    // Populate DataSheet with data
    for (int32_t i = 0; i < cellsName->get_Length(); i++)
    {
        System::String cellName = cellsName[i];
        int32_t cellValue = cellsValue[i];
        dataSheet->GetICells()->GetObjectByIndex(new String(cellName.ToWCS().c_str()))->PutValue(cellValue);
    }

    // Add a chart sheet
    int32_t chartSheetIdx = wb->GetIWorksheets()->Add(Aspose::Cells::SheetType::SheetType_Chart);
    intrusive_ptr<Aspose::Cells::IWorksheet> chartSheet = wb->GetIWorksheets()->GetObjectByIndex(chartSheetIdx);
    chartSheet->SetName(new String("ChartSheet"));

    // Add a chart in ChartSheet with data series from DataSheet
    int32_t chartIdx = chartSheet->GetICharts()->Add(Aspose::Cells::Charts::ChartType::ChartType_Column, 0, chartRows, 0, chartCols);
    intrusive_ptr<Aspose::Cells::Charts::IChart> chart = chartSheet->GetICharts()->GetObjectByIndex(chartIdx);
    chart->GetNISeries()->Add(sheetName + "!A1:E1", false);
    chart->GetNISeries()->Add(sheetName + "!A2:E2", false);
    chart->GetNISeries()->Add(sheetName + "!A3:E3", false);
    chart->GetNISeries()->Add(sheetName + "!A4:E4", false);

    // Set ChartSheet an active sheet
    wb->GetIWorksheets()->SetActiveSheetIndex(chartSheetIdx);

    return chartSheetIdx;
}

結論

関連セクション

チャートのサイズ変更に関する作業ソリューション