Function ShowLegendEntries

Source/3rdParty/implot/implot.cpp:666–751

}

bool ShowLegendEntries(ImPlotItemGroup& items, const ImRect& legend_bb, bool hovered, const ImVec2& pad, const ImVec2& spacing, bool vertical, ImDrawList& DrawList) {
    // vars
    const float txt_ht      = ImGui::GetTextLineHeight();
    const float icon_size   = txt_ht;
    const float icon_shrink = 2;
    ImU32 col_txt           = GetStyleColorU32(ImPlotCol_LegendText);
    ImU32 col_txt_dis       = ImAlphaU32(col_txt, 0.25f);
    // render each legend item
    float sum_label_width = 0;
    bool any_item_hovered = false;

    const int num_items = items.GetLegendCount();
    if (num_items < 1)
        return hovered;
    // build render order
    ImPlotContext& gp = *GImPlot;
    ImVector<int>& indices = gp.TempInt1;
    indices.resize(num_items);
    for (int i = 0; i < num_items; ++i)
        indices[i] = i;
    if (ImHasFlag(items.Legend.Flags, ImPlotLegendFlags_Sort) && num_items > 1) {
        gp.SortItems = &items;
        qsort(indices.Data, num_items, sizeof(int), LegendSortingComp);
    }
    // render
    for (int i = 0; i < num_items; ++i) {
        const int idx           = ImHasFlag(items.Legend.Flags, ImPlotLegendFlags_Reverse) ? indices[num_items - 1 - i] : indices[i];
        ImPlotItem* item        = items.GetLegendItem(idx);
        const char* label       = items.GetLegendLabel(idx);
        const float label_width = ImGui::CalcTextSize(label, nullptr, true).x;
        const ImVec2 top_left   = vertical ?
                                  legend_bb.Min + pad + ImVec2(0, i * (txt_ht + spacing.y)) :
                                  legend_bb.Min + pad + ImVec2(i * (icon_size + spacing.x) + sum_label_width, 0);
        sum_label_width        += label_width;
        ImRect icon_bb;
        icon_bb.Min = top_left + ImVec2(icon_shrink,icon_shrink);
        icon_bb.Max = top_left + ImVec2(icon_size - icon_shrink, icon_size - icon_shrink);
        ImRect label_bb;
        label_bb.Min = top_left;
        label_bb.Max = top_left + ImVec2(label_width + icon_size, icon_size);
        ImU32 col_txt_hl;
        ImU32 col_item = ImAlphaU32(item->Color,1);

        ImRect button_bb(icon_bb.Min, label_bb.Max);

        ImGui::KeepAliveID(item->ID);

        bool item_hov = false;
        bool item_hld = false;
        bool item_clk = ImHasFlag(items.Legend.Flags, ImPlotLegendFlags_NoButtons)
                      ? false
                      : ImGui::ButtonBehavior(button_bb, item->ID, &item_hov, &item_hld);

        if (item_clk)
            item->Show = !item->Show;


        const bool can_hover = (item_hov)