Function PlotPieChartEx

Source/3rdParty/implot/implot_items.cpp:2924–2960

template <typename T>
void PlotPieChartEx(const char* const label_ids[], IndexerIdx<T> indexer, ImPlotPoint center, double radius, double angle0, const ImPlotSpec& spec) {
    ImDrawList& draw_list  = *GetPlotDrawList();

    const bool ignore_hidden = ImHasFlag(spec.Flags, ImPlotPieChartFlags_IgnoreHidden);
    const double sum         = PieChartSum(indexer, ignore_hidden);
    const bool normalize     = ImHasFlag(spec.Flags, ImPlotPieChartFlags_Normalize) || sum > 1.0;

    double a0 = angle0 * 2 * IM_PI / 360.0;
    double a1 = angle0 * 2 * IM_PI / 360.0;
    ImPlotPoint Pmin = ImPlotPoint(center.x - radius, center.y - radius);
    ImPlotPoint Pmax = ImPlotPoint(center.x + radius, center.y + radius);
    for (int i = 0; i < indexer.Count; ++i) {
        ImPlotItem* item = GetItem(label_ids[i]);

        const double percent = normalize ? (double)indexer[i] / sum : (double)indexer[i];
        const bool skip      = sum <= 0.0 || (ignore_hidden && item != nullptr && !item->Show);
        if (!skip)
            a1 = a0 + 2 * IM_PI * percent;

        if (BeginItemEx(label_ids[i], FitterRect(Pmin, Pmax), spec)) {
            const bool hovered = ImPlot::IsLegendEntryHovered(label_ids[i]) && ImHasFlag(spec.Flags, ImPlotPieChartFlags_Exploding);
            if (sum > 0.0) {
                ImU32 col = GetCurrentItem()->Color;
                if (percent < 0.5) {
                    RenderPieSlice(draw_list, center, radius, a0, a1, col, spec.Flags, hovered);
                }
                else {
                    RenderPieSlice(draw_list, center, radius, a0, a0 + (a1 - a0) * 0.5, col, spec.Flags, hovered);
                    RenderPieSlice(draw_list, center, radius, a0 + (a1 - a0) * 0.5, a1, col, spec.Flags, hovered);
                }
            }
            EndItem();
        }
        if (!skip)
            a0 = a1;
    }
}

int PieChartFormatter(double value, char* buff, int size, void* data) {
    const char* fmt = (const char*)data;