void QtViewportHandler::pageItemPositionChanged()
{
QPointF newPosition = m_viewportItem->contentPos();
informVisibleContentChange(m_lastScrollPosition - newPosition);
m_lastScrollPosition = newPosition;
}
void QtViewportInteractionEngine::flickableMovingPositionUpdate()
{
QPointF newPosition = m_viewport->contentPos();
emit informVisibleContentChange(m_lastScrollPosition - newPosition);
m_lastScrollPosition = newPosition;
}
void QtViewportHandler::viewportItemSizeChanged()
{
QSize viewportSize = m_viewportItem->boundingRect().size().toSize();
if (viewportSize.isEmpty())
return;
// Let the WebProcess know about the new viewport size, so that
// it can resize the content accordingly.
m_webPageProxy->setViewportSize(viewportSize);
informVisibleContentChange(QPointF());
}
void QtViewportInteractionEngine::pagePositionRequest(const QPoint& pagePosition)
{
// Ignore the request if suspended. Can only happen due to delay in event delivery.
if (m_suspendCount)
return;
qreal endItemScale = m_content->contentsScale(); // Stay at same scale.
QRectF endPosRange = computePosRangeForItemAtScale(endItemScale);
QPointF endPosition = boundPosition(endPosRange.topLeft(), pagePosition * endItemScale, endPosRange.bottomRight());
QRectF endVisibleContentRect(endPosition / endItemScale, m_viewport->boundingRect().size() / endItemScale);
setItemRectVisible(endVisibleContentRect);
// Make sure that tiles all around the viewport will be requested.
emit informVisibleContentChange(QPointF());
}
void QtViewportInteractionEngine::pinchGestureStarted(const QPointF& pinchCenterInViewportCoordinates)
{
// This can only happen as a result of a user interaction.
ASSERT(m_hadUserInteraction);
if (!m_allowsUserScaling)
return;
m_scaleStack.clear();
m_zoomOutScale = 0.0;
m_scaleUpdateDeferrer = adoptPtr(new ViewportUpdateDeferrer(this, ViewportUpdateDeferrer::DeferUpdateAndSuspendContent));
m_lastPinchCenterInViewportCoordinates = pinchCenterInViewportCoordinates;
m_pinchStartScale = m_content->contentsScale();
// Reset the tiling look-ahead vector so that tiles all around the viewport will be requested on pinch-end.
emit informVisibleContentChange(QPointF());
}
