Refactor DialogManager.3

src/dialogs/DialogManager.h

@@ -27,7 +27,8 @@ public:
     ~DialogManager() override;
 
     void init();
-    QWidget* getTopWidget();
+    void setTopWidget(QWidget* widget);
+    void releaseTopWidget(QWidget* expectedTopWidget);
     void requestLogin();
     int requestAddAccount(QSqlTableModel* model);
     int requestEditSelfAccount();
@@ -43,7 +44,9 @@ private:
 
     QDialog* mFunctionDialog;
     GUIMessageDialog* mMessageDialog;
-    QStack<QDialog*> topWidgetStore;
+    QWidget* topWidget;
+    std::mutex mutex;
+    int mDialogCount = 0;
 };
 
 #endif //GUI_DIALOGMANAGER_H