从文件动态更新 Qdialog 中的 QTextBrowser(由另一个作业更新)
Dynamic update of QTextBrowser in a Qdialog from a file(that gets updated by another job)
我有一个日志文件在作业 运行 期间得到更新。我想要在文本浏览器中显示的文本内容,并且应该动态更新。
.h 文件
public:
void fillloginfo();
void initializeQTimer();
void closeEvent(QCloseEvent *event);
void fillLogInfoChronically(const QString& logFilePath);
private:
QTimer* m_Timer;
QString m_logFilePath;
std::ifstream m_logFileStream;
public slots:
void fillLogInfoChronicallySlot();
.cpp 文件
void logdialog::initializeQTimer(){
m_Timer = NULL;
//create the timer object
m_Timer = new QTimer(this);
QObject::connect(m_Timer,SIGNAL(timeout()), this,SLOT(fillLogInfoChronicallySlot()));
}
void logdialog::closeEvent(QCloseEvent *event)
{
m_Timer->stop();
if ( m_logFileStream.is_open()){
m_logFileStream.close();
}
}
void logdialog::fillLogInfoChronically(const QString &logFilePath)
{
uilog->textBrowser->clear();
m_LastLinePos = 0;
m_logFilePath = logFilePath;
std::string m_logFilePathStr= m_logFilePath.toStdString();
m_logFileStream.open(m_logFilePathStr.c_str());
if (m_logFileStream.is_open()){
fillloginfo();
m_Timer->start(1000);
}
}
void logdialog::fillloginfo()
{
std::string line;
while (getline(m_logFileStream,line)){
uilog->textBrowser->append(QString::fromStdString(line));
}
}
void logdialog::fillLogInfoChronicallySlot()
{
fillloginfo();
}
因此,我只能在第一次调用时读取文件,其余从文件获取更新的调用均无效。
提前致谢
初次读取后需要在输入流中调用std::ios::clear()
。当您读取整个文件时,它会在流中设置 failbit
并拒绝继续读取,即使文件在此期间已更改。
在你的情况下,你必须在再次阅读之前做:
void logdialog::fillloginfo()
{
std::string line;
m_logFileStream.clear();
while (getline(m_logFileStream,line)){
uilog->textBrowser->append(QString::fromStdString(line));
}
}
完整代码在下面link
我有一个日志文件在作业 运行 期间得到更新。我想要在文本浏览器中显示的文本内容,并且应该动态更新。
.h 文件
public:
void fillloginfo();
void initializeQTimer();
void closeEvent(QCloseEvent *event);
void fillLogInfoChronically(const QString& logFilePath);
private:
QTimer* m_Timer;
QString m_logFilePath;
std::ifstream m_logFileStream;
public slots:
void fillLogInfoChronicallySlot();
.cpp 文件
void logdialog::initializeQTimer(){
m_Timer = NULL;
//create the timer object
m_Timer = new QTimer(this);
QObject::connect(m_Timer,SIGNAL(timeout()), this,SLOT(fillLogInfoChronicallySlot()));
}
void logdialog::closeEvent(QCloseEvent *event)
{
m_Timer->stop();
if ( m_logFileStream.is_open()){
m_logFileStream.close();
}
}
void logdialog::fillLogInfoChronically(const QString &logFilePath)
{
uilog->textBrowser->clear();
m_LastLinePos = 0;
m_logFilePath = logFilePath;
std::string m_logFilePathStr= m_logFilePath.toStdString();
m_logFileStream.open(m_logFilePathStr.c_str());
if (m_logFileStream.is_open()){
fillloginfo();
m_Timer->start(1000);
}
}
void logdialog::fillloginfo()
{
std::string line;
while (getline(m_logFileStream,line)){
uilog->textBrowser->append(QString::fromStdString(line));
}
}
void logdialog::fillLogInfoChronicallySlot()
{
fillloginfo();
}
因此,我只能在第一次调用时读取文件,其余从文件获取更新的调用均无效。
提前致谢
初次读取后需要在输入流中调用std::ios::clear()
。当您读取整个文件时,它会在流中设置 failbit
并拒绝继续读取,即使文件在此期间已更改。
在你的情况下,你必须在再次阅读之前做:
void logdialog::fillloginfo()
{
std::string line;
m_logFileStream.clear();
while (getline(m_logFileStream,line)){
uilog->textBrowser->append(QString::fromStdString(line));
}
}
完整代码在下面link