C++ (Cpp) QAbstractItemModel::setParent示例

ColorDialogPanel::ColorDialogPanel(QWidget *parent)
    : QWidget(parent)
    , m_colorComboBox(new QComboBox)
    , m_showAlphaChannel(new QCheckBox(tr("Show alpha channel")))
    , m_noButtons(new QCheckBox(tr("Don't display OK/Cancel buttons")))
    , m_dontUseNativeDialog(new QCheckBox(tr("Don't use native dialog")))
{
    // Options
    QGroupBox *optionsGroupBox = new QGroupBox(tr("Options"), this);
    QVBoxLayout *optionsLayout = new QVBoxLayout(optionsGroupBox);
    optionsLayout->addWidget(m_showAlphaChannel);
    optionsLayout->addWidget(m_noButtons);
    optionsLayout->addWidget(m_dontUseNativeDialog);

    // Color
    QGroupBox *colorGroupBox = new QGroupBox(tr("Color"), this);
    QVBoxLayout *colorLayout = new QVBoxLayout(colorGroupBox);
    colorLayout->addWidget(m_colorComboBox);
    m_colorComboBox->addItems(svgColorNames());
    m_colorComboBox->setEditable(true);

    QAbstractItemModel *sourceModel = m_colorComboBox->model();
    ColorProxyModel* proxyModel = new ColorProxyModel(m_colorComboBox);
    proxyModel->setSourceModel(sourceModel);
    sourceModel->setParent(proxyModel);
    m_colorComboBox->setModel(proxyModel);

    // Buttons
    QGroupBox *buttonsGroupBox = new QGroupBox(tr("Show"));
    QVBoxLayout *buttonsLayout = new QVBoxLayout(buttonsGroupBox);
    addButton(tr("Exec modal"), buttonsLayout, this, SLOT(execModal()));
    addButton(tr("Show modal"), buttonsLayout, this, SLOT(showModal()));
    m_deleteModalDialogButton =
        addButton(tr("Delete modal"), buttonsLayout, this, SLOT(deleteModalDialog()));
    addButton(tr("Show non-modal"), buttonsLayout, this, SLOT(showNonModal()));
    m_deleteNonModalDialogButton =
        addButton(tr("Delete non-modal"), buttonsLayout, this, SLOT(deleteNonModalDialog()));
    addButton(tr("Restore defaults"), buttonsLayout, this, SLOT(restoreDefaults()));
    buttonsLayout->addStretch();

    // Main layout
    QHBoxLayout *mainLayout = new QHBoxLayout(this);
    QVBoxLayout *leftLayout = new QVBoxLayout;
    leftLayout->addWidget(optionsGroupBox);
    leftLayout->addWidget(colorGroupBox);
    leftLayout->addStretch();
    mainLayout->addLayout(leftLayout);
    mainLayout->addWidget(buttonsGroupBox);

    enableDeleteModalDialogButton();
    enableDeleteNonModalDialogButton();
    restoreDefaults();
}