Method nextAvailableWidgetInRange

src/OpenLoco/src/Ui/Window.cpp:1356–1387

    }

    WidgetIndex_t Window::nextAvailableWidgetInRange(WidgetIndex_t minIndex, WidgetIndex_t maxIndex)
    {
        WidgetIndex_t activeIndex = firstActivatedWidgetInRange(minIndex, maxIndex);
        if (activeIndex == kWidgetIndexNull)
        {
            return activeIndex;
        }

        // Offset, wrapping around if needed.
        activeIndex += 1;
        if (activeIndex > maxIndex)
        {
            activeIndex = minIndex;
        }

        for (WidgetIndex_t i = activeIndex; i <= maxIndex; i++)
        {
            if (this->isDisabled(i) || this->widgets[i].type == WidgetType::empty || this->widgets[i].hidden)
            {
                // Wrap around (while compensating for next iteration)
                if (i == maxIndex)
                {
                    i = minIndex - 1;
                }
                continue;
            }

            return i;
        }

        return -1;
    }
}