diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/quick/items/qquickflickable.cpp | 23 |
1 files changed, 18 insertions, 5 deletions
diff --git a/src/quick/items/qquickflickable.cpp b/src/quick/items/qquickflickable.cpp index 7690389936..62bc078f4d 100644 --- a/src/quick/items/qquickflickable.cpp +++ b/src/quick/items/qquickflickable.cpp @@ -1565,7 +1565,7 @@ void QQuickFlickable::wheelEvent(QWheelEvent *event) QQuickItem::wheelEvent(event); return; } - qCDebug(lcWheel) << event->device() << event; + qCDebug(lcWheel) << event->device() << event << event->source(); event->setAccepted(false); qint64 currentTimestamp = d->computeCurrentTime(event); switch (event->phase()) { @@ -1586,7 +1586,8 @@ void QQuickFlickable::wheelEvent(QWheelEvent *event) d->pressed = false; d->scrollingPhase = false; d->draggingEnding(); - event->accept(); + if (isMoving()) + event->accept(); d->lastPosTime = -1; break; case Qt::ScrollEnd: @@ -1713,9 +1714,21 @@ void QQuickFlickable::wheelEvent(QWheelEvent *event) QVector2D velocity(xDelta / elapsed, yDelta / elapsed); d->lastPosTime = currentTimestamp; d->accumulatedWheelPixelDelta += QVector2D(event->pixelDelta()); - d->drag(currentTimestamp, event->type(), event->position(), d->accumulatedWheelPixelDelta, - true, !d->scrollingPhase, true, velocity); - event->accept(); + // Try to drag if 1) we already are dragging or flicking, or + // 2) the flickable is free to flick both directions, or + // 3) the movement so far has been mostly horizontal AND it's free to flick horizontally, or + // 4) the movement so far has been mostly vertical AND it's free to flick vertically. + // Otherwise, wait until the next event. Wheel events with pixel deltas tend to come frequently. + if (isMoving() || isFlicking() || (yflick() && xflick()) + || (xflick() && qAbs(d->accumulatedWheelPixelDelta.x()) > qAbs(d->accumulatedWheelPixelDelta.y() * 2)) + || (yflick() && qAbs(d->accumulatedWheelPixelDelta.y()) > qAbs(d->accumulatedWheelPixelDelta.x() * 2))) { + d->drag(currentTimestamp, event->type(), event->position(), d->accumulatedWheelPixelDelta, + true, !d->scrollingPhase, true, velocity); + event->accept(); + } else { + qCDebug(lcWheel) << "not dragging: accumulated deltas" << d->accumulatedWheelPixelDelta << + "moving?" << isMoving() << "can flick horizontally?" << xflick() << "vertically?" << yflick(); + } } if (!event->isAccepted()) |