Allow to change zoom with wheel

akregator/src/actions/actionmanager.h

@@ -33,6 +33,11 @@ class QAction;
 
 class QWidget;
 
+namespace WebEngineViewer
+{
+class ZoomActionMenu;
+}
+
 namespace Akregator
 {
 
@@ -57,6 +62,8 @@ public:
     virtual QAction *action(const QString &name) = 0;
     virtual QWidget *container(const QString &name) = 0;
 
+    virtual WebEngineViewer::ZoomActionMenu *zoomActionMenu() const = 0;
+
     virtual void setArticleActionsEnabled(bool enabled) = 0;
 
 private:

akregator/src/actions/actionmanagerimpl.h

@@ -71,7 +71,7 @@ public:
     void setArticleActionsEnabled(bool enabled) Q_DECL_OVERRIDE;
     void setTrayIcon(TrayIcon *trayIcon);
     KActionCollection *actionCollection() const;
-    WebEngineViewer::ZoomActionMenu *zoomActionMenu() const;
+    WebEngineViewer::ZoomActionMenu *zoomActionMenu() const Q_DECL_OVERRIDE;
     QString quickSearchLineText() const;
 
 public Q_SLOTS:

akregator/src/articleviewer-ng/webengine/articleviewerwebengine.cpp

@@ -19,6 +19,7 @@
 #include "akregator_debug.h"
 #include "articleviewerwebenginepage.h"
 #include "webengine/urlhandlerwebenginemanager.h"
+#include <WebEngineViewer/ZoomActionMenu>
 #include "actionmanager.h"
 #include "akregatorconfig.h"
 #include "actions/actions.h"
@@ -348,6 +349,16 @@ void ArticleViewerWebEngine::forwardWheelEvent(QWheelEvent *e)
     if (Settings::self()->accessKeyEnabled()) {
         mWebEngineViewAccessKey->wheelEvent(e);
     }
+    if (QApplication::keyboardModifiers() & Qt::ControlModifier) {
+        const int numDegrees = e->delta() / 8;
+        const int numSteps = numDegrees / 15;
+        const qreal factor = ActionManager::getInstance()->zoomActionMenu()->zoomFactor() + numSteps * 10;
+        if (factor >= 10 && factor <= 300) {
+            ActionManager::getInstance()->zoomActionMenu()->setZoomFactor(factor);
+            ActionManager::getInstance()->zoomActionMenu()->setWebViewerZoomFactor(factor / 100.0);
+        }
+        e->accept();  
+    }
 }
 
 void ArticleViewerWebEngine::resizeEvent(QResizeEvent *e)