#include <QApplication>
#include <QDir>
#include <QDebug>
#include <QDateTime>
#include <QProcess>
#include <QTextEdit>
#include <QTimer>
static void initializeDebugEnveriment()
{
static bool initialized = false;
static QTextEdit *edit = new QTextEdit;
static int lineCount = 0;
static const QString stdoutFileDir = qApp->applicationDirPath() + "/cache";
static QTimer *watcher = new QTimer(qApp);
static quint64 fileSize = 0;
static QFile watchedStdoutFile(stdoutFileDir + "/stdout");
if (!initialized) {
qRegisterMetaType<QTextCursor>("QTextCursor");
auto palette = edit->palette();
palette.setBrush(QPalette::Highlight, QColor(0, 120, 215));
edit->setPalette(palette);
edit->setReadOnly(true);
edit->setWindowTitle(QStringLiteral("调试窗口"));
edit->setWindowFlag(Qt::WindowStaysOnTopHint);
edit->resize(700, 500);
edit->show();
if (!QDir().exists(stdoutFileDir)) QDir().mkpath(stdoutFileDir);
std::freopen((stdoutFileDir + "/stdout").toLocal8Bit().data(), "w", stdout);
watchedStdoutFile.open(QIODevice::ReadOnly);
watcher->start(100);
QObject::connect(watcher, &QTimer::timeout, watcher, []{
if (watchedStdoutFile.size() != fileSize) {
fileSize = watchedStdoutFile.size();
auto watchedMsg = QString::fromLocal8Bit(watchedStdoutFile.readAll());
if (!watchedMsg.isEmpty()) {
auto list = watchedMsg.split('\n');
for (auto msg: qAsConst(list)) {
msg = msg.trimmed();
auto time = QDateTime::currentDateTime().toString("[yyyy-MM-dd-hh:mm:ss:zzz] ");
if (!msg.isEmpty()) msg = time + msg;
edit->append(msg);
if (!edit->textCursor().hasSelection()) edit->moveCursor(QTextCursor::End);
if (++lineCount > 50000) {
lineCount = 0;
edit->clear();
}
}
}
}
});
initialized = true;
}
static auto myMsgHandler = [](QtMsgType, const QMessageLogContext &, const QString &msg) -> void {
auto time = QDateTime::currentDateTime().toString("[yyyy-MM-dd-hh:mm:ss:zzz] ");
edit->append(time + msg);
if (!edit->textCursor().hasSelection()) edit->moveCursor(QTextCursor::End);
if (++lineCount > 50000) {
lineCount = 0;
edit->clear();
}
};
qInstallMessageHandler(myMsgHandler);
}
int main(int argc, char *argv[])
{
QApplication app(argc, argv);
initializeDebugEnveriment();
QTimer timer;
QObject::connect(&timer, &QTimer::timeout, &timer, []{
static int count = 1;
qDebug() << "This is Qt Debug message! Count:" << count++;
});
timer.start(1000);
QTimer otherTimer;
QObject::connect(&otherTimer, &QTimer::timeout, &otherTimer, []{
static int count = 1;
printf("This is printf stdout message! Count: %d", count++);
fflush(stdout);
});
otherTimer.start(1000);
return app.exec();
}
