Fix Quick WebEngine middle mouse button scrolling

In Qt Quick, mouse movement will be sent to WebEngine as a QHoverEvent
instead of a QMouseEvent. This change makes sure that when converting
a QHoverEvent to a WebMouseEvent, the screen position is set correctly.
This, in turn, ensures that Chromium will correctly interpret
mouse movement when performing a middle mouse button scroll;
instead of immediately jumping to the top left of the page, it will
now scroll correctly.

Fixes: QTBUG-120131
Change-Id: Ic5cac761974d422bf1f774616e99e5edbf82f4de
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/core/web_event_factory.cpp b/src/core/web_event_factory.cpp
index c2b5d5c53..617eea2d0 100644
--- a/src/core/web_event_factory.cpp
+++ b/src/core/web_event_factory.cpp
@@ -1445,6 +1445,7 @@ WebMouseEvent WebEventFactory::toWebMouseEvent(QHoverEvent *ev)
     webKitEvent.SetType(webEventTypeForEvent(ev));
 
     webKitEvent.SetPositionInWidget(ev->position().x(), ev->position().y());
+    webKitEvent.SetPositionInScreen(ev->globalPosition().x(), ev->globalPosition().y());
     webKitEvent.movement_x = ev->position().x() - ev->oldPos().x();
     webKitEvent.movement_y = ev->position().y() - ev->oldPos().y();
     webKitEvent.is_raw_movement_event = true;