class CustomSysmodel : public QFileSystemModel { Q_OBJECT public: CustomSysmodel(QWidget parent = Q_NULLPTR) : QFileSystemModel(parent), m_limit(100), m_timer(new QTimer(this)), m_threadPool(new QThreadPool(this)) { connect(m_timer, &QTimer::timeout, this, &CustomSysmodel::loadMoreFiles); m_timer->setInterval(2000); } public slots: void fetchFiles(const QString &path) { emit started(); FileSystemWorker worker = new FileSystemWorker; connect(worker, &FileSystemWorker::fileFound, this, &CustomSysmodel::fileFound); connect(worker, &FileSystemWorker::finished, this, &CustomSysmodel::finished); worker->setPath(path); m_threadPool->start(worker); } private: int m_limit; QTimer *m_timer; QThreadPool *m_threadPool; }; class FileSystemWorker : public QObject, public QRunnable { Q_OBJECT public: FileSystemWorker(QObject *parent = nullptr) : QObject(parent) {} void setPath(const QString& path) { m_path = path; } void run() override { QFileInfoList files = QDir(m_path).entryInfoList(QDir::Files); foreach (const QFileInfo &fileInfo, files) { emit fileFound(fileInfo.absoluteFilePath()); } emit finished(); } signals: void started(); void finished(); void fileFound(const QString &filePath); private: QString m_path; }; 将这段代码改成多线程读取,给出完整的修改方案,加上注释
时间: 2024-02-21 15:58:11 浏览: 23
下面是将该段代码改成多线程读取的完整修改方案,已加上注释:
```cpp
class CustomSysmodel : public QFileSystemModel {
Q_OBJECT
public:
CustomSysmodel(QWidget *parent = Q_NULLPTR)
: QFileSystemModel(parent),
m_limit(100),
m_timer(new QTimer(this)),
m_threadPool(new QThreadPool(this))
{
connect(m_timer, &QTimer::timeout, this, &CustomSysmodel::loadMoreFiles);
m_timer->setInterval(2000);
}
public slots:
void fetchFiles(const QString &path)
{
emit started();
// 创建文件系统工作者
FileSystemWorker *worker = new FileSystemWorker;
// 将工作者的信号与自定义模型的槽函数关联
connect(worker, &FileSystemWorker::fileFound, this, &CustomSysmodel::fileFound);
connect(worker, &FileSystemWorker::finished, this, &CustomSysmodel::finished);
// 设置工作者的路径
worker->setPath(path);
// 将工作者添加到线程池中
m_threadPool->start(worker);
}
private:
int m_limit;
QTimer *m_timer;
QThreadPool *m_threadPool;
};
class FileSystemWorker : public QObject, public QRunnable {
Q_OBJECT
public:
FileSystemWorker(QObject *parent = nullptr)
: QObject(parent)
{
}
void setPath(const QString &path)
{
m_path = path;
}
void run() override
{
// 获取指定路径下的文件列表
QFileInfoList files = QDir(m_path).entryInfoList(QDir::Files);
foreach (const QFileInfo &fileInfo, files) {
// 将每个文件的绝对路径通过信号发送出去
emit fileFound(fileInfo.absoluteFilePath());
}
// 发送完成信号
emit finished();
}
signals:
void started();
void finished();
void fileFound(const QString &filePath);
private:
QString m_path;
};
```
注:在多线程读取时,需要将文件系统工作者类 `FileSystemWorker` 继承自 `QRunnable`,并重写 `run()` 函数。`run()` 函数中进行文件读取操作,并通过信号将读取到的文件路径发送出去。同时,在自定义模型类 `CustomSysmodel` 中,需要创建线程池 `m_threadPool`,并将工作者对象添加到线程池中运行。