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我正在尝试使用简单的树模型,但我无法使该示例在我的项目中工作。

首先,我可以毫无问题地使用 QTreeView 和 QStandardItemModel。在以下情况下,我可以看到我的 QTreeView 里面有数据。查看工作代码:

constructor{
m_pModel = new QStandardItemModel();
ui.treeViewDevicesList->setModel(m_pModel);
fillTreeView(devicesList);
}

void GatewayDeviceViewerEditor::fillTreeView(const std::vector<Payload> &devicesList)
{
    QVector<QStandardItem *> parents(MAX_PARENTS);
    parents[0] = m_pModel->invisibleRootItem();

    for (vector<Payload>::const_iterator it = devicesList.begin() ; it != devicesList.end(); ++it)
    {
        QStandardItem *pTreeViewItem = new QStandardItem();
        string rootTitle =  it->deviceId + " " + it->deviceName + " " + it->status ;
        pTreeViewItem->setText(rootTitle.c_str());
        parents[0]->appendRow(pTreeViewItem);
       // parents[1] = pTreeViewItem;
    }
}

现在,以下代码不起作用。我正在尝试对模型进行子类化。在这种情况下,QTreeView 显示出来但完全是空的。有一些我想我不明白的地方。

entryPoint{
DeviceTreeModel deviceTreeModel(devicesList);
ui.treeViewDevicesList->setModel(&deviceTreeModel);
}

DeviceTreeModel::DeviceTreeModel(const std::vector<Payload> &devicesList, QObject *parent)
    : QAbstractItemModel(parent)
{
    QList<QVariant> rootData;
    rootData << "Title" << "Summary";
    m_pRootItem = new DeviceTreeItem(rootData);
    setupModelData(devicesList, m_pRootItem);
}

void DeviceTreeModel::setupModelData(const std::vector<Payload> &devicesList, DeviceTreeItem *parent)
{
    QList<DeviceTreeItem*> parents;
    parents << parent;


    for (vector<Payload>::const_iterator it = devicesList.begin() ; it != devicesList.end(); ++it)
    {
        string rootTitle =  it->deviceId + " " + it->deviceName + " " + it->status ;
        QString test(rootTitle.c_str());
        QList<QVariant> columnData;
        columnData << test << "Summary";

        parents.last()->appendChild(new DeviceTreeItem(columnData, parents.last()));
    }

}
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1 回答 1

1

entryPoint中,我认为deviceTreeModel需要分配new, 而不是在退出函数时将被销毁的本地实例。

于 2015-12-30T08:46:26.580 回答