Function Items_SingleStringGetter

include/imgui/imgui_widgets.cpp:2146–2159

Getter for the old Combo() API: "item1\0item2\0item3\0"

// Getter for the old Combo() API: "item1\0item2\0item3\0"
static const char* Items_SingleStringGetter(void* data, int idx)
{
    const char* items_separated_by_zeros = (const char*)data;
    int items_count = 0;
    const char* p = items_separated_by_zeros;
    while (*p)
    {
        if (idx == items_count)
            break;
        p += ImStrlen(p) + 1;
        items_count++;
    }
    return *p ? p : NULL;
}

// Old API, prefer using BeginCombo() nowadays if you can.
bool ImGui::Combo(const char* label, int* current_item, const char* (*getter)(void* user_data, int idx), void* user_data, int items_count, int popup_max_height_in_items)