Update main framework.

Main/Main.pro

@@ -2,23 +2,19 @@ QT       += network sql widgets core
 TARGET = Invoicing
 TRANSLATIONS = ./Translations/Invoicing_zh_CN.ts
 
+include(../singleapplication/singleapplication.pri)
+DEFINES += QAPPLICATION_CLASS=QApplication
+
 SOURCES += \
     main.cpp \
     mainwindow.cpp \
-    qtlocalpeer.cpp \
-    qtsingleapplication.cpp \
-    qtlockedfile.cpp \
-    qtlockedfile_unix.cpp \
-    qtlockedfile_win.cpp
 
 HEADERS += \
+    helper.h \
     mainwindow.h \
     plugin_interface.h \
     usermanagement_interface.h \
     productmanagement_interface.h \
-    qtsingleapplication.h \
-    qtlocalpeer.h \
-    qtlockedfile.h
 
 OTHER_FILES += \
     ideas.txt \

Main/helper.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#define INSTALL_TRANSLATION \
+do { \
+    foreach (QString fileName, QDir(":/Translations").entryList(QDir::Files)) { \
+        QTranslator *qtTranslator = new QTranslator(); \
+        if(qtTranslator->load(QFileInfo(fileName).baseName(), ":/Translations")){ \
+            QApplication::instance()->installTranslator(qtTranslator); \
+        } \
+    } \
+} while(0)

Main/main.cpp

@@ -1,51 +1,57 @@
-#if QT_VERSION < 0x050000
-#include <QtGui>
-#else
 #include <QtWidgets>
-#endif
+#include <singleapplication.h>
+
+#include "helper.h"
 #include "mainwindow.h"
-#include "qtsingleapplication.h"
 
-int main(int argv, char *args[])
-{
-    //QApplication app(argv, args);
-    QtSingleApplication app(argv, args);
-    QTextCodec *codec = QTextCodec::codecForName("UTF-8");
-    QTextCodec::setCodecForLocale(codec);
-#if QT_VERSION < 0x050000
-    QTextCodec::setCodecForCStrings(codec);
-    QTextCodec::setCodecForTr(codec);
+void raiseWidget(QWidget *widget) {
+#ifdef Q_OS_WINDOWS
+    HWND hwnd = (HWND)widget->winId();
+    // check if widget is minimized to Windows task bar
+    if (::IsIconic(hwnd)) {
+        ::ShowWindow(hwnd, SW_RESTORE);
+    }
+    ::SetForegroundWindow(hwnd);
+#else
+    widget->show();
+    widget->raise();
+    widget->activateWindow();
 #endif
+}
 
-    QDir qmdir(":/Translations");
-    foreach (QString fileName, qmdir.entryList(QDir::Files)) {
-        //qDebug()<<QFileInfo(fileName).baseName();
-        QTranslator *qtTranslator = new QTranslator();
-        qtTranslator->load(QFileInfo(fileName).baseName(), ":/Translations");
-        QApplication::instance()->installTranslator(qtTranslator);
+int main(int argv, char *args[]) {
+#ifdef Q_OS_WINDOWS
+    SingleApplication app(argv, args, true);
+    if (app.isSecondary()) {
+        AllowSetForegroundWindow(DWORD(app.primaryPid()));
+        app.sendMessage("RAISE_WIDGET");
+        return 0;
     }
+#else
+    SingleApplication app(argv, args);
+#endif
 
-    //QMessageBox::information(0, QObject::tr("Error"), getHDLogicalID());
-    //QMessageBox::information(0, QObject::tr("Error"), calActiveCode(getHDLogicalID()));
-
-    if(!MainWindow::isRegistration()) {
-        QMessageBox::information(0, QObject::tr("Error"), QObject::tr("This software has not been registered!"));
-        //return 0;
-    }
+    INSTALL_TRANSLATION;
 
-    if(app.isRunning()) {
-        QMessageBox::information(0, QObject::tr("Error"), QObject::tr("Application is alreay running!"));
-        return 0;
+    if (!MainWindow::isRegistered()) {
+        QMessageBox::information(
+            0, QObject::tr("Error"),
+            QObject::tr("This software has not been registered!"));
     }
+    MainWindow *mainWindow = MainWindow::getInstance();
 
-    MainWindow* mainWindow = MainWindow::getInstance();
+#ifdef Q_OS_WINDOWS
+    QObject::connect(&app, &SingleApplication::receivedMessage, mainWindow,
+                     [mainWindow]() { raiseWidget(mainWindow); });
+#else
+    QObject::connect(&app, &SingleApplication::instanceStarted, mainWindow,
+                     [mainWindow]() { raiseWidget(mainWindow); });
+#endif
 
-    //mainWindow->setGeometry(100, 100, 800, 500);
+    // mainWindow->setGeometry(100, 100, 800, 500);
     mainWindow->showMaximized();
     mainWindow->show();
     int ret = app.exec();
     MainWindow::release();
     return ret;
 }
-
-