如何让QListViewItem作为QTree的子项自定义控件-QT开发中文网

QListViewItem 只能用于 QListView 控件中，而 QTree 控件需要使用 QTreeWidgetItem。因此，如果你想让自定义控件成为 QTree 的子项，你需要继承 QTreeWidgetItem 并实现自己的子类。

首先，创建一个新的类，例如 CustomTreeWidgetItem，继承自 QTreeWidgetItem：

class CustomTreeWidgetItem : public QTreeWidgetItem
{
public:
    CustomTreeWidgetItem(QTreeWidget *parent);
    CustomTreeWidgetItem(QTreeWidgetItem *parent);
    CustomTreeWidgetItem(QTreeWidget *parent, const QStringList &strings);
    CustomTreeWidgetItem(QTreeWidgetItem *parent, const QStringList &strings);

private:
    // add your custom controls and properties here
};

然后，在 CustomTreeWidgetItem 类中添加你想要的自定义控件和属性，例如：

class CustomTreeWidgetItem : public QTreeWidgetItem
{
public:
    CustomTreeWidgetItem(QTreeWidget *parent);
    CustomTreeWidgetItem(QTreeWidgetItem *parent);
    CustomTreeWidgetItem(QTreeWidget *parent, const QStringList &strings);
    CustomTreeWidgetItem(QTreeWidgetItem *parent, const QStringList &strings);

private:
    QLabel *m_label;
    QPushButton *m_button;

public:
    QLabel *label() const { return m_label; }
    void setLabel(QLabel *label) { m_label = label; }

    QPushButton *button() const { return m_button; }
    void setButton(QPushButton *button) { m_button = button; }
};

接下来，在 CustomTreeWidgetItem 构造函数中初始化你的自定义控件和属性：

CustomTreeWidgetItem::CustomTreeWidgetItem(QTreeWidget *parent)
    : QTreeWidgetItem(parent)
{
    m_label = new QLabel(this);
    m_button = new QPushButton(this);

    setText(0, "Custom Item");

    setFlags(flags() | Qt::ItemIsEditable);
}

最后，在 QTree 控件中创建和添加 CustomTreeWidgetItem，例如：

QTreeWidget *treeWidget = new QTreeWidget(this);

CustomTreeWidgetItem *item = new CustomTreeWidgetItem(treeWidget);
item->setLabel(new QLabel("My Label", item));
item->setButton(new QPushButton("My Button", item));

treeWidget->addTopLevelItem(item);

现在，你已经成功地将自定义控件作为 QTree 的子项。