Method SetNextItemRefVal

include/imgui/imgui_widgets.cpp:3788–3793

}

void ImGui::SetNextItemRefVal(ImGuiDataType data_type, void* p_data)
{
    ImGuiContext& g = *GImGui;
    g.NextItemData.HasFlags |= ImGuiNextItemDataFlags_HasRefVal;
    memcpy(&g.NextItemData.RefVal, p_data, DataTypeGetInfo(data_type)->Size);
}

// Note: p_data, p_step, p_step_fast are _pointers_ to a memory address holding the data. For an Input widget, p_step and p_step_fast are optional.
// Read code of e.g. InputFloat(), InputInt() etc. or examples in 'Demo->Widgets->Data Types' to understand how to use this function directly.