Make zoom level in titlebar update more frequently

src/mainwindow.cpp

@@ -74,6 +74,12 @@ MainWindow::MainWindow(QWidget *parent) :
     slideshowTimer = new QTimer(this);
     connect(slideshowTimer, &QTimer::timeout, this, &MainWindow::slideshowAction);
 
+    // Timer for updating titlebar after zoom change
+    zoomTitlebarUpdateTimer = new QTimer(this);
+    zoomTitlebarUpdateTimer->setSingleShot(true);
+    zoomTitlebarUpdateTimer->setInterval(50);
+    connect(zoomTitlebarUpdateTimer, &QTimer::timeout, this, &MainWindow::buildWindowTitle);
+
     // Context menu
     auto &actionManager = qvApp->getActionManager();
 
@@ -389,7 +395,8 @@ void MainWindow::fileChanged()
 
 void MainWindow::zoomLevelChanged()
 {
-    buildWindowTitle();
+    if (!zoomTitlebarUpdateTimer->isActive())
+        zoomTitlebarUpdateTimer->start();
 }
 
 void MainWindow::disableActions()

src/mainwindow.h

@@ -159,6 +159,7 @@ protected slots:
     QMenu *virtualMenu;
 
     QTimer *slideshowTimer;
+    QTimer *zoomTitlebarUpdateTimer;
 
     QShortcut *escShortcut;
 

src/qvgraphicsview.cpp

@@ -58,11 +58,6 @@ QVGraphicsView::QVGraphicsView(QWidget *parent) : QGraphicsView(parent)
     expensiveScaleTimer->setInterval(50);
     connect(expensiveScaleTimer, &QTimer::timeout, this, [this]{applyExpensiveScaling();});
 
-    emitZoomLevelChangedTimer = new QTimer(this);
-    emitZoomLevelChangedTimer->setSingleShot(true);
-    emitZoomLevelChangedTimer->setInterval(50);
-    connect(emitZoomLevelChangedTimer, &QTimer::timeout, this, [this]{emit zoomLevelChanged();});
-
     loadedPixmapItem = new QGraphicsPixmapItem();
     scene->addItem(loadedPixmapItem);
 
@@ -332,7 +327,7 @@ void QVGraphicsView::zoomAbsolute(const qreal absoluteLevel, const QPoint &pos)
     if (isScalingEnabled)
         expensiveScaleTimer->start();
 
-    emitZoomLevelChangedTimer->start();
+    emit zoomLevelChanged();
 }
 
 void QVGraphicsView::applyExpensiveScaling()

src/qvgraphicsview.h

@@ -148,6 +148,5 @@ private slots:
     QVImageCore imageCore { this };
 
     QTimer *expensiveScaleTimer;
-    QTimer *emitZoomLevelChangedTimer;
 };
 #endif // QVGRAPHICSVIEW_H