[qt] Add menu to toggle VSync

src/celestia/qt/qtappwin.cpp

@@ -537,6 +537,9 @@ void CelestiaAppWindow::writeSettings()
     settings.setValue("SyncTime", simulation->getSyncTime());
     settings.setValue("FramesVisible", m_appCore->getFramesVisible());
     settings.setValue("ActiveFrameVisible", m_appCore->getActiveFrameVisible());
+#ifdef VIDEO_SYNC
+    settings.setValue("VSync", m_appCore->getRenderer()->getVideoSync());
+#endif
 
     // TODO: This is not a reliable way determine when local time is enabled, but it's
     // all that CelestiaCore offers right now. useLocalTime won't ever be true when the system
@@ -1221,6 +1224,10 @@ void CelestiaAppWindow::createMenus()
     textureResolutionMenu->addAction(actions->mediumResAction);
     textureResolutionMenu->addAction(actions->highResAction);
 
+#ifdef VIDEO_SYNC
+    displayMenu->addSeparator();
+    displayMenu->addAction(actions->toggleVSyncAction);
+#endif
 
     /****** Bookmark menu ******/
     bookmarkMenu = menuBar()->addMenu(_("&Bookmarks"));
@@ -1272,6 +1279,19 @@ void CelestiaAppWindow::createMenus()
     bool check;
     QSettings settings;
     settings.beginGroup("Preferences");
+#ifdef VIDEO_SYNC
+    if (settings.contains("VSync"))
+    {
+        check = settings.value("VSync").toBool();
+    }
+    else
+    {
+        check = m_appCore->getRenderer()->getVideoSync();
+    }
+    actions->toggleVSyncAction->setChecked(check);
+    m_appCore->getRenderer()->setVideoSync(check);
+#endif
+
     if (settings.contains("FramesVisible"))
     {
         check = settings.value("FramesVisible").toBool();

src/celestia/qt/qtcelestiaactions.cpp

@@ -202,6 +202,12 @@ CelestiaActions::CelestiaActions(QObject* parent,
     lightTimeDelayAction->setToolTip("Subtract one-way light travel time to selected object");
     connect(lightTimeDelayAction, SIGNAL(triggered()), this, SLOT(slotSetLightTimeDelay()));
 
+    toggleVSyncAction    = createCheckableAction(_("Limit Frame Rate"), 0);
+//    toggleVSyncAction->setShortcut(QKeySequence("Ctrl+Y"));
+    toggleVSyncAction->setToolTip(_("Faintest visible magnitude based on field of view"));
+    connect(toggleVSyncAction,    SIGNAL(triggered()), this, SLOT(slotToggleVsync()));
+
+
     syncWithRenderer(appCore->getRenderer());
     syncWithAppCore();
     appCore->getRenderer()->addWatcher(this);
@@ -392,6 +398,10 @@ void CelestiaActions::slotSetLightTimeDelay()
     appCore->charEntered('-');
 }
 
+void CelestiaActions::slotToggleVsync()
+{
+     appCore->getRenderer()->setVideoSync(!appCore->getRenderer()->getVideoSync());
+}
 
 // Convenience method to create a checkable action for a menu and set the data
 // to the specified integer value.

src/celestia/qt/qtcelestiaactions.h

@@ -39,6 +39,7 @@ Q_OBJECT
     void slotSetTextureResolution();
     void slotAdjustLimitingMagnitude();
     void slotSetLightTimeDelay();
+    void slotToggleVsync();
 
  private:
     void syncWithRenderer(const Renderer* renderer);
@@ -115,6 +116,8 @@ Q_OBJECT
     QAction* increaseLimitingMagAction{ nullptr };
     QAction* decreaseLimitingMagAction{ nullptr };
 
+    QAction* toggleVSyncAction{ nullptr };
+
  private:
     CelestiaCore* appCore;
 };