how to define the color of legend of column chart?

[rodingbao]

is there anyone know that how to define the color of legend of column chart?

[Kvaz1r]

Not sure if it's possible (long time didn't use the lib) but guess you can set color in wxChartFontOptions for "x" axis.

[rodingbao]

I try to add dataset and re-set the pen color with following code, but error occured as belowing. pls comments.

C:/TDM-GCC-64/bin/../lib/gcc/x86_64-w64-mingw32/10.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: ../build-Release/family/main.cpp.o:main.cpp:(.rdata$.refptr.wxChartsDefaultTheme[.refptr.wxChartsDefaultTheme]+0x0): undefined reference to `wxChartsDefaultTheme'

my code: wxChartsCategoricalData::ptr chartData = wxChartsCategoricalData::make_shared(labels);

// add dataset
wxVector<double> t_points;
for (size_t i = 0; i < points.size(); i++) {
  t_points.assign(points[i].begin(), points[i].end());
  wxChartsDoubleDataset::ptr dataset( new wxChartsDoubleDataset(seriesName[i], t_points));
  chartData->AddDataset(dataset);

  // define pen color
  wxChartsDatasetTheme *datasetTheme = new wxChartsDatasetTheme();
  datasetTheme->SetColumnChartDatasetOptions(wxColumnChartDatasetOptions(
      wxChartsPenOptions(wxColour(COLOR[i]), 2),
      wxChartsBrushOptions(wxColour(COLOR[i]))));
  wxChartsDefaultTheme->SetDatasetTheme(
      wxChartsDatasetId::CreateImplicitId(i),
      wxSharedPtr<wxChartsDatasetTheme>(datasetTheme));
}

for (int i = 0; i < points.size(); i++) //nDatasets - amount of datasets { auto color = wxChartsDefaultTheme->GetDatasetTheme(wxChartsDatasetId::CreateImplicitId(i))->GetStackedColumnChartDatasetOptions()->GetBrushOptions().GetColor(); wxChartsDefaultTheme->GetDatasetTheme(wxChartsDatasetId::CreateImplicitId(i))->SetLineChartDatasetOptions( wxLineChartDatasetOptions( color, color, color ) ); }