diff options
Diffstat (limited to 'src/core/render_widget_host_view_qt.cpp')
| -rw-r--r-- | src/core/render_widget_host_view_qt.cpp | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/src/core/render_widget_host_view_qt.cpp b/src/core/render_widget_host_view_qt.cpp index d1fc7d171..a45383946 100644 --- a/src/core/render_widget_host_view_qt.cpp +++ b/src/core/render_widget_host_view_qt.cpp @@ -282,6 +282,7 @@ RenderWidgetHostViewQt::RenderWidgetHostViewQt(content::RenderWidgetHost* widget , m_cursorPositionWithinSelection(-1) , m_cursorPosition(0) , m_emptyPreviousSelection(true) + , m_wheelAckPending(false) { m_host->SetView(this); #ifndef QT_NO_ACCESSIBILITY @@ -1350,7 +1351,28 @@ void RenderWidgetHostViewQt::accessibilityActiveChanged(bool active) void RenderWidgetHostViewQt::handleWheelEvent(QWheelEvent *ev) { - m_host->ForwardWheelEvent(WebEventFactory::toWebWheelEvent(ev, dpiScale())); + if (!m_wheelAckPending) { + Q_ASSERT(m_pendingWheelEvents.isEmpty()); + m_wheelAckPending = true; + m_host->ForwardWheelEvent(WebEventFactory::toWebWheelEvent(ev, dpiScale())); + return; + } + if (!m_pendingWheelEvents.isEmpty()) { + // Try to combine with this wheel event with the last pending one. + if (WebEventFactory::coalesceWebWheelEvent(m_pendingWheelEvents.last(), ev, dpiScale())) + return; + } + m_pendingWheelEvents.append(WebEventFactory::toWebWheelEvent(ev, dpiScale())); +} + +void RenderWidgetHostViewQt::WheelEventAck(const blink::WebMouseWheelEvent &/*event*/, content::InputEventAckState /*ack_result*/) +{ + m_wheelAckPending = false; + if (!m_pendingWheelEvents.isEmpty()) { + m_wheelAckPending = true; + m_host->ForwardWheelEvent(m_pendingWheelEvents.takeFirst()); + } + // TODO: We could forward unhandled wheelevents to our parent. } void RenderWidgetHostViewQt::clearPreviousTouchMotionState() |