Help viewer: Add option for scroll wheel zooming

Fixes: QTCREATORBUG-14154
Change-Id: Ia6c4aedb78954614477f0228ba82c4dc476a2525
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@qt.io>
Reviewed-by: David Schulz <david.schulz@qt.io>

1 files changed, 12 insertions, 0 deletions

diff --git a/src/plugins/help/localhelpmanager.cpp b/src/plugins/help/localhelpmanager.cpp
index 3f698f2f284..140aa4a9350 100644
--- a/src/plugins/help/localhelpmanager.cpp
+++ b/src/plugins/help/localhelpmanager.cpp
@@ -65,6 +65,7 @@ static const char kFontSizeKey[] = "Help/FallbackFontSize";
 static const char kStartOptionKey[] = "Help/StartOption";
 static const char kContextHelpOptionKey[] = "Help/ContextHelpOption";
 static const char kReturnOnCloseKey[] = "Help/ReturnOnClose";
+static const char kUseScrollWheelZooming[] = "Help/UseScrollWheelZooming";
 static const char kLastShownPagesKey[] = "Help/LastShownPages";
 static const char kLastShownPagesZoomKey[] = "Help/LastShownPagesZoom";
 static const char kLastSelectedTabKey[] = "Help/LastSelectedTab";
@@ -225,6 +226,17 @@ void LocalHelpManager::setReturnOnClose(bool returnOnClose)
     emit m_instance->returnOnCloseChanged();
 }
 
+bool LocalHelpManager::isScrollWheelZoomingEnabled()
+{
+    return Core::ICore::settings()->value(kUseScrollWheelZooming, true).toBool();
+}
+
+void LocalHelpManager::setScrollWheelZoomingEnabled(bool enabled)
+{
+    Core::ICore::settings()->setValue(kUseScrollWheelZooming, enabled);
+    emit m_instance->scrollWheelZoomingEnabledChanged(enabled);
+}
+
 QStringList LocalHelpManager::lastShownPages()
 {
     const QVariant value = Core::ICore::settings()->value(kLastShownPagesKey, QVariant());