Fix crash when trying to close database during unlock

* Fix #7239 - prevent closing the database widget if the open dialog is still unlocking the database. This problem became slightly worse with quick unlock.

With this fix, if the user tries to close the database during unlock we will just ignore that request.

src/gui/DatabaseOpenWidget.cpp

@@ -35,6 +35,7 @@
 #endif
 
 #include <QCheckBox>
+#include <QCloseEvent>
 #include <QDesktopServices>
 #include <QFont>
 
@@ -168,6 +169,11 @@ void DatabaseOpenWidget::hideEvent(QHideEvent* event)
     }
 }
 
+bool DatabaseOpenWidget::unlockingDatabase()
+{
+    return m_unlockingDatabase;
+}
+
 void DatabaseOpenWidget::load(const QString& filename)
 {
     clearForms();
@@ -522,6 +528,7 @@ void DatabaseOpenWidget::setUserInteractionLock(bool state)
         }
         m_ui->centralStack->setEnabled(true);
     }
+    m_unlockingDatabase = state;
 }
 
 bool DatabaseOpenWidget::isOnQuickUnlockScreen()

src/gui/DatabaseOpenWidget.h

@@ -46,6 +46,7 @@ public:
     void enterKey(const QString& pw, const QString& keyFile);
     QSharedPointer<Database> database();
     void resetQuickUnlock();
+    bool unlockingDatabase();
 
 signals:
     void dialogFinished(bool accepted);
@@ -78,6 +79,7 @@ private slots:
 private:
     bool m_pollingHardwareKey = false;
     bool m_blockQuickUnlock = false;
+    bool m_unlockingDatabase = false;
     QTimer m_hideTimer;
 
     Q_DISABLE_COPY(DatabaseOpenWidget)

src/gui/DatabaseWidget.cpp

@@ -1565,12 +1565,12 @@ Group* DatabaseWidget::currentGroup() const
 
 void DatabaseWidget::closeEvent(QCloseEvent* event)
 {
-    if (!isLocked() && !lock()) {
+    if (!lock() || m_databaseOpenWidget->unlockingDatabase()) {
         event->ignore();
         return;
     }
-    m_databaseOpenWidget->resetQuickUnlock();
 
+    m_databaseOpenWidget->resetQuickUnlock();
     event->accept();
 }