账单记录器迁移。

main.cpp

@@ -0,0 +1,31 @@
+#include "mainwidget.h"
+#include <QApplication>
+#include <QFile>
+#include <SingleApplication>
+
+int main(int argc, char* argv[])
+{
+    SingleApplication a(argc, argv);
+    // a.setStyle("fusion");
+
+#if (QT_VERSION < QT_VERSION_CHECK(6, 0, 0))
+    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#endif
+
+    MainWidget w;
+
+    QObject::connect(&a, &SingleApplication::instanceStarted, &w, [&w]() {
+        w.showNormal();
+        w.raise();
+        w.activateWindow();
+    });
+
+    
+    QFile file(":/qss/flatgray.css");
+    if (file.open(QFile::ReadOnly)) {
+        a.setStyleSheet(file.readAll());
+    }
+
+    w.show();
+    return a.exec();
+}