From d630c627ed1dfbcfb48f907d2d37048b049830a5 Mon Sep 17 00:00:00 2001 From: Martin Jones Date: Thu, 26 Aug 2010 13:51:38 +1000 Subject: Avoid Flickable view jumping when drag threashold is exceeded. Task-number: QTBUG-13176 --- src/declarative/graphicsitems/qdeclarativeflickable.cpp | 10 ++++++++-- src/declarative/graphicsitems/qdeclarativeflickable_p_p.h | 1 + 2 files changed, 9 insertions(+), 2 deletions(-) diff --git a/src/declarative/graphicsitems/qdeclarativeflickable.cpp b/src/declarative/graphicsitems/qdeclarativeflickable.cpp index a6e8c85..a710190 100644 --- a/src/declarative/graphicsitems/qdeclarativeflickable.cpp +++ b/src/declarative/graphicsitems/qdeclarativeflickable.cpp @@ -653,6 +653,8 @@ void QDeclarativeFlickablePrivate::handleMousePressEvent(QGraphicsSceneMouseEven timeline.clear(); hData.velocity = 0; vData.velocity = 0; + hData.dragStartOffset = 0; + vData.dragStartOffset = 0; lastPos = QPoint(); QDeclarativeItemPrivate::start(lastPosTime); pressPos = event->pos(); @@ -675,7 +677,9 @@ void QDeclarativeFlickablePrivate::handleMouseMoveEvent(QGraphicsSceneMouseEvent if (q->yflick()) { int dy = int(event->pos().y() - pressPos.y()); if (qAbs(dy) > QApplication::startDragDistance() || QDeclarativeItemPrivate::elapsed(pressTime) > 200) { - qreal newY = dy + vData.pressPos; + if (!vMoved) + vData.dragStartOffset = dy; + qreal newY = dy + vData.pressPos - vData.dragStartOffset; const qreal minY = q->minYExtent(); const qreal maxY = q->maxYExtent(); if (newY > minY) @@ -705,7 +709,9 @@ void QDeclarativeFlickablePrivate::handleMouseMoveEvent(QGraphicsSceneMouseEvent if (q->xflick()) { int dx = int(event->pos().x() - pressPos.x()); if (qAbs(dx) > QApplication::startDragDistance() || QDeclarativeItemPrivate::elapsed(pressTime) > 200) { - qreal newX = dx + hData.pressPos; + if (!hMoved) + hData.dragStartOffset = dx; + qreal newX = dx + hData.pressPos - hData.dragStartOffset; const qreal minX = q->minXExtent(); const qreal maxX = q->maxXExtent(); if (newX > minX) diff --git a/src/declarative/graphicsitems/qdeclarativeflickable_p_p.h b/src/declarative/graphicsitems/qdeclarativeflickable_p_p.h index b919e1b..c398faa 100644 --- a/src/declarative/graphicsitems/qdeclarativeflickable_p_p.h +++ b/src/declarative/graphicsitems/qdeclarativeflickable_p_p.h @@ -96,6 +96,7 @@ public: QDeclarativeTimeLineValueProxy move; qreal viewSize; qreal pressPos; + qreal dragStartOffset; qreal velocity; qreal flickTarget; QDeclarativeFlickablePrivate::Velocity smoothVelocity; -- cgit v0.12