Creating Excel Chart and Embedding it in Presentation as OLE Object

In PowerPoint Slides, the use of editable chats for graphical display of the data is a common activity. Aspose provides the support of creating the Excel Charts with the use of Aspose.Cells for Java and further these charts can be embedded as an OLE Object in the PowerPoint Slide through Aspose.Slides for Java. This article covers the required steps along with the implementation in Java to create and embed an MS Excel Chart as an OLE Object in PowerPoint presentation by using Aspose.Cells for Java and Aspose.Slides for Java.

Required Steps

Following sequence of steps is required to create and embed an Excel Chart as an OLE Object in the PowerPoint Slide:# Create an Excel Chart using Aspose.Cells for Java.# Set the OLE size of the Excel Chart. using Aspose.Cells for Java.# Get the image of the Excel Chart with Aspose.Cells for Java.# Embed the Excel Chart as an OLE Object inside PPTX presentation using Aspose.Slides for Java.# Replace the object changed image with the image obtained in step 3 to cater Object Changed Issue# Save the output presentation to disk in PPTX format

Implementation of the Required Steps

The implementation of the above steps in Java is as under:

        
try {
    
    //Create a workbook
Workbook wb = new Workbook();
//Add an excel chart
int chartRows = 55;
int chartCols = 25;
int chartSheetIndex = AddExcelChartInWorkbook(wb, chartRows, chartCols);
//Set chart ole size
wb.getWorksheets().setOleSize(0, chartRows, 0, chartCols);
//Get the chart image and save to stream
com.aspose.cells.ImageOrPrintOptions opts= new com.aspose.cells.ImageOrPrintOptions();
opts.setImageFormat(com.aspose.cells.ImageFormat.getPng());
ByteArrayOutputStream imageStream=new ByteArrayOutputStream();
wb.getWorksheets().get(chartSheetIndex).getCharts().get(0).toImage(imageStream, opts);
//Save the workbook to stream
ByteArrayOutputStream bout=new ByteArrayOutputStream();
 
wb.save(bout,com.aspose.cells.SaveFormat.EXCEL_97_TO_2003);
//Create a presentation
Presentation pres = new Presentation();
ISlide sld = pres.getSlides().get_Item(0);
//Add the workbook on slide
AddExcelChartInPresentation(pres, sld, bout.toByteArray(), imageStream.toByteArray());
//Write the presentation to disk
pres.save("outputJ.pptx", SaveFormat.Pptx);
    
} catch (Exception e) {
}

static void AddExcelChartInPresentation(Presentation pres, ISlide sld, byte[] wbArray,    byte[] imgChart) throws Exception
{
    double oleHeight = pres.getSlideSize().getSize().getHeight();
    double oleWidth = pres.getSlideSize().getSize().getWidth();
    Workbook wb=new Workbook();
 
    //Createing and EXCEL_97_TO_2003 LoadOptions object
    com.aspose.cells.LoadOptions loadOptions = new com.aspose.cells.LoadOptions(com.aspose.cells.FileFormatType.EXCEL_97_TO_2003);         
    wb=new Workbook(new ByteArrayInputStream(wbArray),loadOptions);
 
    IOleObjectFrame oof = sld.getShapes().addOleObjectFrame(0f, 0f, (float)oleWidth, (float)oleHeight, "Excel.Sheet.8", wbArray);
    oof.getSubstitutePictureFormat().getPicture().setImage(pres.getImages().addImage(new ByteArrayInputStream(imgChart)));
 
}

static int AddExcelChartInWorkbook(Workbook wb, int chartRows, int chartCols)
{
//Array of cell names
String[] cellsName = new String[]
        {
                "A1", "A2", "A3", "A4",
                "B1", "B2", "B3", "B4",
                "C1", "C2", "C3", "C4",
                "D1", "D2", "D3", "D4",
                "E1", "E2", "E3", "E4"
        };
//Array of cell data
int[] cellsValue = new int[]
        {
                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
int dataSheetIndex =wb.getWorksheets().add();
Worksheet dataSheet =wb.getWorksheets().get(dataSheetIndex);
String sheetName = "DataSheet";
dataSheet.setName(sheetName);
//Populate DataSheet with data
int size= Array.getLength(cellsName);
for (int i = 0; i < size; i++)
{
    String cellName = cellsName[i];
    int cellValue = cellsValue[i];
    dataSheet.getCells().get(cellName).setValue(cellValue);
}
//Add a chart sheet
int WorksheetIndex = wb.getWorksheets().add(SheetType.CHART);
Worksheet chartSheet = wb.getWorksheets().get(WorksheetIndex);
chartSheet.setName("ChartSheet");
int chartSheetIdx = chartSheet.getIndex();
//Add a chart in ChartSheet with data series from DataSheet
int chIndex = chartSheet.getCharts().add(ChartType.COLUMN, 0, chartRows, 0, chartCols);
Chart chart=chartSheet.getCharts().get(chIndex);
 
chart.getNSeries().add(sheetName + "!A1:E1", false);
chart.getNSeries().add(sheetName + "!A2:E2", false);
chart.getNSeries().add(sheetName + "!A3:E3", false);
chart.getNSeries().add(sheetName + "!A4:E4", false);
//Set ChartSheet as active sheet
wb.getWorksheets().setActiveSheetIndex(chartSheetIdx);
return chartSheetIdx;
 
}

The presentation created through above method, will carry the Excel chart as OLE Object that can be activated by double clicking the OLE Object Frame.

Conclusion

By using Aspose.Cells for Java along with Aspose.Slides for Java, we can create any of the Excel Charts as supported by Aspose.Cells for Java and embed the created chart as an OLE Object in a PowerPoint Slide. The OLE Size of the Excel Chart can also be defined. The end users can further edit the Excel Chart like any other OLE Object.

Related Sections

Working Solution for Chart Resizing

Object Changed Issue