main.cpp

#include "mainwindow.h"
#include <singleapplication.h>
#include <QTranslator>
#include <QDebug>
#include <QFile>
#include <QDateTime>
#include <QDir>

static QString timePoint;

//日志生成
void LogMsgOutput(QtMsgType type,
	const QMessageLogContext&,
	const QString& msg)
{
	static QMutex mutex; //日志代码互斥锁

	// 持有锁
	mutex.lock();

	// Critical Resource of Code
	QByteArray localMsg = msg.toLocal8Bit();
	QString log;

	switch (type) {
	case QtDebugMsg:
		log.append(QString("Debug %1")
			.arg(localMsg.constData()));
		break;
	case QtInfoMsg:
		log.append(QString("Info: %1")
			.arg(localMsg.constData()));
		break;
	case QtWarningMsg:
		log.append(QString("Warning: %1")
			.arg(localMsg.constData()));
		break;
	case QtCriticalMsg:
		log.append(QString("Critical: %1")
			.arg(localMsg.constData()));
		break;
	case QtFatalMsg:
		log.append(QString("Fatal: %1")
			.arg(localMsg.constData()));
		break;
	}

	QDir dir(QApplication::applicationDirPath());
	dir.mkdir("logs");
	QFile file(dir.path() + QString("/logs/log%1.lgt").arg(timePoint));
	file.open(QIODevice::WriteOnly | QIODevice::Append);
	QTextStream out(&file);
	out << log << endl;
	file.close();

	// 释放锁
	mutex.unlock();
}

int main(int argc, char *argv[])
{

	Q_INIT_RESOURCE(DrCOM_JLU_Qt);
	SingleApplication a(argc, argv);

	//release模式输出日志到文件
	// 因为调用了QApplication::applicationDirPath()
	// 要在QApplication实例化之后调用
#ifndef QT_DEBUG
	timePoint = QDateTime::currentDateTime().toString("yyyyMMddHHmmss");
	qInstallMessageHandler(LogMsgOutput);
#endif

	SingleApplication::setQuitOnLastWindowClosed(false);
	SingleApplication::setAttribute(Qt::AA_EnableHighDpiScaling);

	qDebug() << "...main...";

	QFont font = a.font();
	font.setPointSize(10);
	font.setFamily("Microsoft YaHei");
	a.setFont(font);

	QTranslator translator;
	translator.load(":/ts/DrCOM_zh_CN.qm");
	a.installTranslator(&translator);

    MainWindow w(&a);
	QObject::connect(&a, &SingleApplication::instanceStarted, [&w]() {
		qDebug() << "One instance had started. Its window will be shown by the next line of the source code.";
		w.ShowLoginWindow();
	});

    QSettings s(SETTINGS_FILE_NAME);
    bool bHideWindow=s.value(ID_HIDE_WINDOW, false).toBool();
	// 如果是软件自行重启的就不显示窗口
	int restartTimes = s.value(ID_RESTART_TIMES, 0).toInt();
	qDebug() << "main: restartTimes=" << restartTimes;
    if(bHideWindow){
        qDebug()<<"not show window caused by user settings";
    } else if (restartTimes > 0) {
        // 是自行重启不显示窗口
        qDebug()<<"not show window caused by self restart";
    } else {
		qDebug() << "show caused by normal start";
		w.show();
	}
	return a.exec();
}