Qt: Get rid of nested event loops in achievement login

src/core/achievements.cpp

@@ -688,9 +688,7 @@ void Achievements::UpdateSettings(const Settings& old_config)
   if (g_settings.achievements_hardcore_mode != old_config.achievements_hardcore_mode)
   {
     // Enables have to wait for reset, disables can go through immediately.
-    if (g_settings.achievements_hardcore_mode)
-      DisplayHardcoreDeferredMessage();
-    else
+    if (!g_settings.achievements_hardcore_mode)
       DisableHardcoreMode(true, true);
   }
 
@@ -1701,8 +1699,8 @@ void Achievements::OnHardcoreModeChanged(bool enabled, bool display_message, boo
   if (System::IsValid() && display_message)
   {
     Host::AddIconOSDMessage(OSDMessageType::Info, "AchievementsHardcoreModeChanged", RA_LOGO_ICON_NAME,
-                            enabled ? TRANSLATE_STR("Achievements", "Hardcore Mode Enabled") :
-                                      TRANSLATE_STR("Achievements", "Hardcore Mode Disabled"),
+                            enabled ? TRANSLATE_STR("Achievements", "Hardcore mode enabled.") :
+                                      TRANSLATE_STR("Achievements", "Hardcore mode disabled."),
                             enabled ? TRANSLATE_STR("Achievements", "Restrictions are now active.") :
                                       TRANSLATE_STR("Achievements", "Restrictions are no longer active."));
   }

src/duckstation-qt/achievementlogindialog.cpp

@@ -80,45 +80,81 @@ void AchievementLoginDialog::processLoginResult(bool result, const QString& mess
     return;
   }
 
-  if (!Host::GetBaseBoolSettingValue("Cheevos", "Enabled", false) &&
-      QtUtils::MessageBoxQuestion(
-        this, tr("Enable Achievements"),
-        tr("Achievement tracking is not currently enabled. Your login will have no effect until "
-           "after tracking is enabled.\n\nDo you want to enable tracking now?")) == QMessageBox::Yes)
+  // don't ask to enable etc if we are just reauthenticating
+  if (m_reason == Achievements::LoginRequestReason::TokenInvalid)
   {
+    accept();
+    return;
+  }
+
+  askToEnableAchievementsAndAccept();
+}
+
+void AchievementLoginDialog::askToEnableAchievementsAndAccept()
+{
+  if (Host::GetBaseBoolSettingValue("Cheevos", "Enabled", false))
+  {
+    askToEnableHardcoreModeAndAccept();
+    return;
+  }
+
+  QMessageBox* const msgbox =
+    QtUtils::NewMessageBox(this, QMessageBox::Question, tr("Enable Achievements"),
+                           tr("Achievement tracking is not currently enabled. Your login will have no effect until "
+                              "after tracking is enabled.\n\nDo you want to enable tracking now?"),
+                           QMessageBox::Yes | QMessageBox::No, QMessageBox::NoButton);
+  msgbox->connect(msgbox, &QMessageBox::accepted, this, [this]() {
     Host::SetBaseBoolSettingValue("Cheevos", "Enabled", true);
     Host::CommitBaseSettingChanges();
     g_emu_thread->applySettings();
+    askToEnableHardcoreModeAndAccept();
+  });
+  msgbox->connect(msgbox, &QMessageBox::rejected, this, &AchievementLoginDialog::accept);
+  msgbox->open();
+}
+
+void AchievementLoginDialog::askToEnableHardcoreModeAndAccept()
+{
+  if (Host::GetBaseBoolSettingValue("Cheevos", "ChallengeMode", false))
+  {
+    askToResetGameAndAccept();
+    return;
   }
 
-  if (!Host::GetBaseBoolSettingValue("Cheevos", "ChallengeMode", false) &&
-      QtUtils::MessageBoxQuestion(
-        this, tr("Enable Hardcore Mode"),
-        tr("Hardcore mode is not currently enabled. Enabling hardcore mode allows you to set times, scores, and "
-           "participate in game-specific leaderboards.\n\nHowever, hardcore mode also prevents the usage of save "
-           "states, cheats and slowdown functionality.\n\nDo you want to enable hardcore mode?")) == QMessageBox::Yes)
-  {
+  QMessageBox* const msgbox = QtUtils::NewMessageBox(
+    this, QMessageBox::Question, tr("Enable Hardcore Mode"),
+    tr("Hardcore mode is not currently enabled. Enabling hardcore mode allows you to set times, scores, and "
+       "participate in game-specific leaderboards.\n\nHowever, hardcore mode also prevents the usage of save "
+       "states, cheats and slowdown functionality.\n\nDo you want to enable hardcore mode?"),
+    QMessageBox::Yes | QMessageBox::No, QMessageBox::NoButton);
+  msgbox->connect(msgbox, &QMessageBox::accepted, this, [this]() {
     Host::SetBaseBoolSettingValue("Cheevos", "ChallengeMode", true);
     Host::CommitBaseSettingChanges();
     g_emu_thread->applySettings();
+    askToResetGameAndAccept();
+  });
+  msgbox->connect(msgbox, &QMessageBox::rejected, this, &AchievementLoginDialog::accept);
+  msgbox->open();
+}
 
-    bool has_active_game;
-    {
-      auto lock = Achievements::GetLock();
-      has_active_game = Achievements::HasActiveGame();
-    }
-
-    if (has_active_game &&
-        QtUtils::MessageBoxCritical(
-          this, tr("Reset System"),
-          tr("Hardcore mode will not be enabled until the system is reset. Do you want to reset the system now?")) ==
-          QMessageBox::Yes)
-    {
-      g_emu_thread->resetSystem(true);
-    }
+void AchievementLoginDialog::askToResetGameAndAccept()
+{
+  if (!QtHost::IsSystemValid())
+  {
+    accept();
+    return;
   }
 
-  accept();
+  QMessageBox* const msgbox = QtUtils::NewMessageBox(
+    this, QMessageBox::Question, tr("Reset System"),
+    tr("Hardcore mode will not be enabled until the system is reset. Do you want to reset the system now?"),
+    QMessageBox::Yes | QMessageBox::No, QMessageBox::NoButton);
+  msgbox->connect(msgbox, &QMessageBox::accepted, this, [this]() {
+    g_emu_thread->resetSystem(true);
+    accept();
+  });
+  msgbox->connect(msgbox, &QMessageBox::rejected, this, &AchievementLoginDialog::accept);
+  msgbox->open();
 }
 
 void AchievementLoginDialog::connectUi()

src/duckstation-qt/achievementlogindialog.h

@@ -27,6 +27,10 @@ private:
   void cancelClicked();
   void processLoginResult(bool result, const QString& message);
 
+  void askToEnableAchievementsAndAccept();
+  void askToEnableHardcoreModeAndAccept();
+  void askToResetGameAndAccept();
+
   Ui::AchievementLoginDialog m_ui;
   QPushButton* m_login;
   Achievements::LoginRequestReason m_reason;

src/duckstation-qt/achievementsettingswidget.cpp

@@ -179,15 +179,12 @@ void AchievementSettingsWidget::onHardcoreModeStateChanged()
       return;
   }
 
-  if (QtUtils::MessageBoxQuestion(
-        this, tr("Reset System"),
-        tr("Hardcore mode will not be enabled until the system is reset. Do you want to reset the system now?")) !=
-      QMessageBox::Yes)
-  {
-    return;
-  }
-
-  g_emu_thread->resetSystem(true);
+  QMessageBox* const msgbox = QtUtils::NewMessageBox(
+    this, QMessageBox::Question, tr("Reset System"),
+    tr("Hardcore mode will not be enabled until the system is reset. Do you want to reset the system now?"),
+    QMessageBox::Yes | QMessageBox::No, QMessageBox::NoButton);
+  msgbox->connect(msgbox, &QMessageBox::accepted, this, []() { g_emu_thread->resetSystem(true); });
+  msgbox->open();
 }
 
 void AchievementSettingsWidget::onAchievementsNotificationDurationSliderChanged()