diff options
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativelistview.cpp')
-rw-r--r-- | src/declarative/graphicsitems/qdeclarativelistview.cpp | 63 |
1 files changed, 26 insertions, 37 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativelistview.cpp b/src/declarative/graphicsitems/qdeclarativelistview.cpp index 38a4839..94b1cb3 100644 --- a/src/declarative/graphicsitems/qdeclarativelistview.cpp +++ b/src/declarative/graphicsitems/qdeclarativelistview.cpp @@ -334,28 +334,9 @@ public: return model && model->count() && model->isValid(); } - int snapIndex() { - int index = currentIndex; - for (int i = 0; i < visibleItems.count(); ++i) { - FxListItem *item = visibleItems[i]; - if (item->index == -1) - continue; - qreal itemTop = item->position(); - if (itemTop >= highlight->position()-item->size()/2 && itemTop < highlight->position()+item->size()/2) - return item->index; - } - return index; - } - qreal snapPosAt(qreal pos) { - for (int i = 0; i < visibleItems.count(); ++i) { - FxListItem *item = visibleItems[i]; - if (item->index == -1) - continue; - qreal itemTop = item->position(); - if (itemTop+item->size()/2 >= pos && itemTop <= pos) - return item->position(); - } + if (FxListItem *snapItem = snapItemAt(pos)) + return snapItem->position(); if (visibleItems.count()) { qreal firstPos = visibleItems.first()->position(); qreal endPos = visibleItems.last()->position(); @@ -368,17 +349,18 @@ public: } FxListItem *snapItemAt(qreal pos) { + FxListItem *snapItem = 0; for (int i = 0; i < visibleItems.count(); ++i) { FxListItem *item = visibleItems[i]; if (item->index == -1) continue; qreal itemTop = item->position(); - if (item->index == model->count()-1 || (itemTop+item->size()/2 >= pos)) + if (highlight && itemTop >= pos && item->endPosition() <= pos + highlight->size() - 1) return item; + if (itemTop+item->size()/2 >= pos && itemTop-item->size()/2 < pos) + snapItem = item; } - if (visibleItems.count() && visibleItems.first()->position() <= pos) - return visibleItems.first(); - return 0; + return snapItem; } int lastVisibleIndex() const { @@ -768,8 +750,10 @@ void QDeclarativeListViewPrivate::layout() minExtentDirty = true; maxExtentDirty = true; updateHighlight(); - fixupPosition(); - q->refill(); + if (!q->isMoving() && !q->isFlicking()) { + fixupPosition(); + q->refill(); + } if (header) updateHeader(); if (footer) @@ -1173,6 +1157,7 @@ void QDeclarativeListViewPrivate::fixup(AxisData &data, qreal minExtent, qreal m || (orient == QDeclarativeListView::Vertical && &data == &hData)) return; + correctFlick = false; int oldDuration = fixupDuration; fixupDuration = moveReason == Mouse ? fixupDuration : 0; @@ -1350,12 +1335,15 @@ void QDeclarativeListViewPrivate::flick(AxisData &data, qreal minExtent, qreal m qreal newtarget = data.flickTarget; if (snapMode != QDeclarativeListView::NoSnap || highlightRange == QDeclarativeListView::StrictlyEnforceRange) newtarget = -snapPosAt(-(data.flickTarget - highlightRangeStart)) + highlightRangeStart; - if (velocity < 0 && newtarget < maxExtent) - newtarget = maxExtent; - else if (velocity > 0 && newtarget > minExtent) - newtarget = minExtent; - if (newtarget == data.flickTarget) // boundary unchanged - nothing to do + if (velocity < 0 && newtarget <= maxExtent) + newtarget = maxExtent - overshootDist; + else if (velocity > 0 && newtarget >= minExtent) + newtarget = minExtent + overshootDist; + if (newtarget == data.flickTarget) { // boundary unchanged - nothing to do + if (qAbs(velocity) < MinimumFlickVelocity) + correctFlick = false; return; + } data.flickTarget = newtarget; qreal dist = -newtarget + data.move.value(); if ((v < 0 && dist < 0) || (v > 0 && dist > 0)) { @@ -1365,7 +1353,7 @@ void QDeclarativeListViewPrivate::flick(AxisData &data, qreal minExtent, qreal m return; } timeline.reset(data.move); - timeline.accelDistance(data.move, v, -dist + (v < 0 ? -overshootDist : overshootDist)); + timeline.accelDistance(data.move, v, -dist); timeline.callback(QDeclarativeTimeLineCallback(&data.move, fixupCallback, this)); } } else { @@ -1696,7 +1684,7 @@ void QDeclarativeListView::setCurrentIndex(int index) if (isComponentComplete() && d->isValid()) { d->moveReason = QDeclarativeListViewPrivate::SetIndex; d->updateCurrent(index); - } else { + } else if (d->currentIndex != index) { d->currentIndex = index; emit currentIndexChanged(); } @@ -2323,9 +2311,10 @@ void QDeclarativeListView::viewportMoved() d->highlight->setPosition(qRound(pos)); // update current index - int idx = d->snapIndex(); - if (idx >= 0 && idx != d->currentIndex) - d->updateCurrent(idx); + if (FxListItem *snapItem = d->snapItemAt(d->highlight->position())) { + if (snapItem->index >= 0 && snapItem->index != d->currentIndex) + d->updateCurrent(snapItem->index); + } } } |