C++ (Cpp) TBWidget::GetDisabled示例

bool TBSelectList::ChangeValue(SPECIAL_KEY key)
{
    if (!m_source || !m_layout.GetContentRoot()->GetFirstChild())
        return false;

    bool forward;
    if (key == TB_KEY_HOME || key == TB_KEY_DOWN)
        forward = true;
    else if (key == TB_KEY_END || key == TB_KEY_UP)
        forward = false;
    else
        return false;

    TBWidget *item_root = m_layout.GetContentRoot();
    TBWidget *current = GetItemWidget(m_value);
    TBWidget *origin = nullptr;
    if (key == TB_KEY_HOME || (!current && key == TB_KEY_DOWN))
        current = item_root->GetFirstChild();
    else if (key == TB_KEY_END || (!current && key == TB_KEY_UP))
        current = item_root->GetLastChild();
    else
        origin = current;

    while (current)
    {
        if (current != origin && !current->GetDisabled())
            break;
        current = forward ? current->GetNext() : current->GetPrev();
    }
    // Select and focus what we found
    if (current)
    {
        SetValue(current->data.GetInt());
        return true;
    }
    return false;
}