void visualize_histo(const THisto& input_histo,
vtkIdType chart_type = vtkChart::LINE, size_t size_x = 640,
size_t size_y = 480) {
auto chart = chart_from_histogram(input_histo, chart_type);
// Set up the view
auto view = vtkSmartPointer<vtkContextView>::New();
view->GetScene()->AddItem(chart);
view->GetRenderer()->SetBackground(1.0, 1.0, 1.0);
view->GetRenderWindow()->SetSize(size_x, size_y);
view->GetInteractor()->Initialize();
view->GetInteractor()->Start();
}
ChartWidget::ChartWidget()
{
// indexing
index_ = numChartWidgets_;
numChartWidgets_++;
// setup the view
view_ = vtkSmartPointer<vtkContextView>::New();
view_->GetRenderer()->SetBackground(1.,1.,1.);
view_->SetInteractor(GetInteractor());
SetRenderWindow(view_->GetRenderWindow());
// create chart and add it to view
chart_ = vtkSmartPointer<vtkChartXY>::New();
view_->GetScene()->AddItem(chart_);
// show legend, by default in the lower left
chart_->SetShowLegend(true);
chart_->GetLegend()->SetVerticalAlignment(vtkChartLegend::BOTTOM);
chart_->GetLegend()->SetHorizontalAlignment(vtkChartLegend::LEFT);
// don't allow zooming out beyond range of data
chart_->SetForceAxesToBounds(true);
// right button zooms (instead of selects)
chart_->SetActionToButton(vtkChart::ZOOM, vtkContextMouseEvent::RIGHT_BUTTON);
// create SVG exporter
svgExporter_ = vtkSmartPointer<vtkGL2PSExporter>::New();
// use an off-screen constant-sized render window for SVG export
svgRenderWindow_ = vtkSmartPointer<vtkRenderWindow>::New();
svgRenderWindow_->OffScreenRenderingOn();
svgRenderWindow_->SetSize(480, 300);
svgExporter_->SetRenderWindow(svgRenderWindow_);
svgExporter_->SetFileFormatToSVG();
svgExporter_->CompressOff();
svgExporter_->SetSortToOff();
svgExporter_->TextAsPathOn();
// set minimum height
setMinimumHeight(150);
}
