设置QStringListModel项的自定义数据

问题描述

我有QStringListModel

I have QStringListModel

QStringListModel* blocksModel = new QStringListModel();

和从QObject继承的类

And a class inherited from the QObject

class Block : public QObject
{
    Q_OBJECT

public:

    Block();
    Block(const Block& other);
    ~Block;

//and other stuff here    

};
Q_DECLARE_METATYPE(Block*)

当我为Qt :: EditRole设置数据时，一切正常，但是当我试图设置Qt :: UserRole的数据，它从不返回true，当我得到数据我看到无效的QVariant

When I set a data for the Qt::EditRole, everything works fine but when I'm trying to set data for the Qt::UserRole, it never returns true, and when I'm getting data I see invalid QVariant

int count = blocksModel->rowCount();
blocksModel->insertRows(count, 1);
QModelIndex index = blocksModel->index(count, 0);

// it works
QString name = QString("Block %1").arg(count + 1);
blocksModel->setData(index, name);

QVariant var = QVariant::fromValue(block);
// it doesn`t work
bool setSuccessful = blocksModel->setData(index, var, Qt::UserRole);

//invalid QVariant
QVariant var2 = index.data(Qt::UserRole);
Block* oneMoreBlock = var2.value<Block*>();

事实上，无论我试图为该项设置什么类型的数据， `t work：

In fact no matter wich type of data I'm trying to set for the item, this also doesn`t work:

blocksModel->setData(index, QVariant(1), Qt::UserRole);

我试过Qt :: UserRole + 1，得到相同的结果。也许我应该定义ItemDataRoles使用的模型以某种方式？

And I`ve tried Qt::UserRole + 1, and got the same result. Maybe I should define ItemDataRoles used by the model somehow?

任何想法？感谢。

推荐答案

尝试使用QStandardItemModel而不是QStringListModel。

Try using a QStandardItemModel instead of QStringListModel.

QStringListModel似乎不支持Qt :: UserRole。

QStringListModel doesn't seem to support Qt::UserRole.

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