How to make xls charts? - c++

Question

I'm trying to export application data as xls chart.
I'm doing it using SimpleXlsxWriter.
But I have some problems with this lib.
Here's what I got using this lib
#include <Xlsx/Workbook.h>
int main()
{
using namespace SimpleXlsx;
CWorkbook book;
CWorksheet &data = book.AddSheet("Data");
std::vector<CellDataDbl> header = { 1, 3, 5, 6, 8 };
std::vector<CellDataDbl> data1 = { 2, 6, 4, 8, 5 };
std::vector<CellDataDbl> data2 = { 5, 3, 5, 2, 4 };
data.AddRow(header);
data.AddRow(data1);
data.AddRow(data2);
CChartsheet &chart = book.AddChart("Chart", CHART_BAR);
chart.SetBarDirection(CChartsheet::BAR_DIR_VERTICAL);
chart.SetBarGrouping(CChartsheet::BAR_GROUP_STACKED);
chart.SetTableDataState(CChartsheet::TBL_DATA);
chart.SetLegendPos(CChartsheet::EPosition::POS_TOP);
CChartsheet::Series ser1;
ser1.valAxisFrom = CellCoord(1, 0);
ser1.valAxisTo = CellCoord(1, data1.size() - 1);
ser1.valSheet = &data;
ser1.title = "Ser1";
CChartsheet::Series ser2;
ser2.valAxisFrom = CellCoord(2, 0);
ser2.valAxisTo = CellCoord(2, data2.size() - 1);
ser2.valSheet = &data;
ser2.title = "Ser2";
chart.AddSeries(ser1);
chart.AddSeries(ser2);
book.Save("test.xls");
}
I didn't find the ways how to show y-axes, show horizontal lines, set x-axes values, insert the chart into the data sheet, etc.
Here's what do I want to get as a result
What a library can help me or how can I get a required result? Maybe SimpleXlsxWriter can do that?

Answer 1

You can get what you want from the SimpleXlsxWriter, just with a few modifications of your code. Briefly:
save with SimpleXlsxWriter's format .xlsx not .xls
Add a category axis to one of your series and set it to first data row
use BAR_GROUP_PERCENT_STACKED since you want the y axis to be on % scale
You can control the order you add the series the the chart, to get the order you want in the bottom table
Consider this code, suggested modifications are indicated in comments:
int main()
{
using namespace SimpleXlsx;
CWorkbook book;
CWorksheet &data = book.AddSheet("Data");
std::vector<CellDataDbl> header = { 1, 3, 5, 6, 8 };
std::vector<CellDataDbl> data1 = { 2, 6, 4, 8, 5 };
std::vector<CellDataDbl> data2 = { 5, 3, 5, 2, 4 };
data.AddRow(header);
data.AddRow(data1);
data.AddRow(data2);
CChartsheet &chart = book.AddChart("Chart", CHART_BAR);
chart.SetBarDirection(CChartsheet::BAR_DIR_VERTICAL);
chart.SetBarGrouping(CChartsheet::BAR_GROUP_PERCENT_STACKED); // <-- seems you want this format?
chart.SetTableDataState(CChartsheet::TBL_DATA);
chart.SetLegendPos(CChartsheet::EPosition::POS_TOP);
chart.SetYAxisGrid(CChartsheet::EGridLines::GRID_MAJOR); // <-- to draw the horizontal lines
CChartsheet::Series ser1;
ser1.valSheet = &data;
ser1.valAxisFrom = CellCoord(1, 0);
ser1.valAxisTo = CellCoord(1, data1.size() - 1);
ser1.title = "Ser1";
// Now add a category axis from your the first row of the data sheet
ser1.catAxisFrom = CellCoord(0, 0);
ser1.catAxisTo = CellCoord(0, data1.size() - 1);
ser1.catSheet = &data;
CChartsheet::Series ser2;
ser2.valSheet = &data;
ser2.valAxisFrom = CellCoord(2, 0);
ser2.valAxisTo = CellCoord(2, data2.size() - 1);
ser2.title = "Ser2";
// insert the series in the order you want from the bottom up in the chart's table
chart.AddSeries(ser2);
chart.AddSeries(ser1);
book.Save("c:\\so\\test.xlsx"); // <-- Save as xlsx, not xls
}