Method Step

external/imgui/imgui.cpp:3538–3559

}

bool ImGuiListClipper::Step()
{
    ImGuiContext& g = *Ctx;
    bool need_items_height = (ItemsHeight <= 0.0f);
    bool ret = ImGuiListClipper_StepInternal(this);
    if (ret && (DisplayStart >= DisplayEnd))
        ret = false;
    if (g.CurrentTable && g.CurrentTable->IsUnfrozenRows == false)
        IMGUI_DEBUG_LOG_CLIPPER("Clipper: Step(): inside frozen table row.\n");
    if (need_items_height && ItemsHeight > 0.0f)
        IMGUI_DEBUG_LOG_CLIPPER("Clipper: Step(): computed ItemsHeight: %.2f.\n", ItemsHeight);
    if (ret)
    {
        IMGUI_DEBUG_LOG_CLIPPER("Clipper: Step(): display %d to %d.\n", DisplayStart, DisplayEnd);
    }
    else
    {
        IMGUI_DEBUG_LOG_CLIPPER("Clipper: Step(): End.\n");
        End();
    }
    return ret;
}

// Generic helper, equivalent to old ImGui::CalcListClipping() but stateless
void ImGui::CalcClipRectVisibleItemsY(const ImRect& clip_rect, const ImVec2& pos, float items_height, int* out_visible_start, int* out_visible_end)