diff options
Diffstat (limited to 'src/declarative/graphicsitems/qdeclarativepathview.cpp')
| -rw-r--r-- | src/declarative/graphicsitems/qdeclarativepathview.cpp | 641 |
1 files changed, 349 insertions, 292 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativepathview.cpp b/src/declarative/graphicsitems/qdeclarativepathview.cpp index b9c8971..f3d6137 100644 --- a/src/declarative/graphicsitems/qdeclarativepathview.cpp +++ b/src/declarative/graphicsitems/qdeclarativepathview.cpp @@ -138,6 +138,103 @@ void QDeclarativePathViewPrivate::clear() items.clear(); } +void QDeclarativePathViewPrivate::updateMappedRange() +{ + if (model && pathItems != -1 && pathItems < model->count()) + mappedRange = qreal(pathItems)/model->count(); + else + mappedRange = 1.0; +} + +qreal QDeclarativePathViewPrivate::positionOfIndex(int index) const +{ + qreal pos = -1.0; + + if (model && index >= 0 && index < model->count()) { + qreal globalPos = qreal(index) + offset; + globalPos = qmlMod(globalPos, qreal(model->count())) / model->count(); + if (pathItems != -1 && pathItems < model->count()) { + globalPos += snapPos * mappedRange; + globalPos = qmlMod(globalPos, 1.0); + if (globalPos < mappedRange) + pos = globalPos / mappedRange; + } else { + pos = qmlMod(globalPos + snapPos, 1.0); + } + } + + return pos; +} + +void QDeclarativePathViewPrivate::createHighlight() +{ + Q_Q(QDeclarativePathView); + bool changed = false; + if (highlightItem) { + delete highlightItem; + highlightItem = 0; + changed = true; + } + + QDeclarativeItem *item = 0; + if (highlightComponent) { + QDeclarativeContext *highlightContext = new QDeclarativeContext(qmlContext(q)); + QObject *nobj = highlightComponent->create(highlightContext); + if (nobj) { + highlightContext->setParent(nobj); + item = qobject_cast<QDeclarativeItem *>(nobj); + if (!item) + delete nobj; + } else { + delete highlightContext; + } + } else { + item = new QDeclarativeItem; + } + if (item) { + item->setParent(q); + highlightItem = item; + changed = true; + } + if (changed) + emit q->highlightItemChanged(); +} + +void QDeclarativePathViewPrivate::updateHighlight() +{ + Q_Q(QDeclarativePathView); + if (!q->isComponentComplete()) + return; + if (highlightItem) + updateItem(highlightItem, snapPos); +} + +void QDeclarativePathViewPrivate::updateItem(QDeclarativeItem *item, qreal percent) +{ + if (QDeclarativePathViewAttached *att = attached(item)) { + foreach(const QString &attr, path->attributes()) + att->setValue(attr.toUtf8(), path->attributeAt(attr, percent)); + } + QPointF pf = path->pointAt(percent); + item->setX(pf.x() - item->width()*item->scale()/2); + item->setY(pf.y() - item->height()*item->scale()/2); +} + +void QDeclarativePathViewPrivate::regenerate() +{ + Q_Q(QDeclarativePathView); + if (!q->isComponentComplete()) + return; + + clear(); + + if (!isValid()) + return; + + firstIndex = -1; + updateMappedRange(); + q->refill(); +} /*! \qmlclass PathView QDeclarativePathView @@ -232,6 +329,7 @@ void QDeclarativePathView::setModel(const QVariant &model) if (d->model) { disconnect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); disconnect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); + disconnect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int))); disconnect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset())); disconnect(d->model, SIGNAL(createdItem(int, QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*))); for (int i=0; i<d->items.count(); i++){ @@ -261,13 +359,16 @@ void QDeclarativePathView::setModel(const QVariant &model) if (d->model) { connect(d->model, SIGNAL(itemsInserted(int,int)), this, SLOT(itemsInserted(int,int))); connect(d->model, SIGNAL(itemsRemoved(int,int)), this, SLOT(itemsRemoved(int,int))); + connect(d->model, SIGNAL(itemsMoved(int,int,int)), this, SLOT(itemsMoved(int,int,int))); connect(d->model, SIGNAL(modelReset()), this, SLOT(modelReset())); connect(d->model, SIGNAL(createdItem(int, QDeclarativeItem*)), this, SLOT(createdItem(int,QDeclarativeItem*))); } - d->firstIndex = 0; - d->pathOffset = 0; + d->offset = qmlMod(d->offset, qreal(d->model->count())); + if (d->offset < 0) + d->offset = d->model->count() + d->offset; d->regenerate(); d->fixOffset(); + emit countChanged(); emit modelChanged(); } @@ -330,7 +431,7 @@ void QDeclarativePathView::setCurrentIndex(int idx) if (d->model->count()) { int itemIndex = (d->currentIndex - d->firstIndex + d->model->count()) % d->model->count(); if (itemIndex < d->items.count()) { - if (QDeclarativeItem *item = d->items.at(d->currentIndex)) { + if (QDeclarativeItem *item = d->items.at(itemIndex)) { if (QDeclarativePathViewAttached *att = d->attached(item)) att->setIsCurrentItem(false); } @@ -354,12 +455,13 @@ void QDeclarativePathView::setCurrentIndex(int idx) /*! \qmlproperty real PathView::offset - The offset specifies how far along the path (0.0-1.0) the items are from their initial positions. + The offset specifies how far along the path the items are from their initial positions. + This is a real number that ranges from 0.0 to the count of items in the model. */ qreal QDeclarativePathView::offset() const { Q_D(const QDeclarativePathView); - return d->_offset; + return d->offset; } void QDeclarativePathView::setOffset(qreal offset) @@ -372,18 +474,25 @@ void QDeclarativePathView::setOffset(qreal offset) void QDeclarativePathViewPrivate::setOffset(qreal o) { Q_Q(QDeclarativePathView); - if (_offset != o) { - _offset = qmlMod(o, qreal(1.0)); - if (_offset < 0) - _offset = 1.0 + _offset; - q->refill(); + if (offset != o) { + if (isValid() && q->isComponentComplete()) { + offset = qmlMod(o, qreal(model->count())); + if (offset < 0) + offset = model->count() + offset; + q->refill(); + } else { + offset = o; + } + emit q->offsetChanged(); } } /*! \qmlproperty real PathView::snapPosition - This property determines the position (0.0-1.0) the nearest item will snap to. + This property determines the position on the path (0.0-1.0) the nearest item will snap to. + The item nearest this position will set currentIndex, for example when offset is 0.0 the + first item will be placed at this position and currentIndex will be 0. */ qreal QDeclarativePathView::snapPosition() const { @@ -398,10 +507,34 @@ void QDeclarativePathView::setSnapPosition(qreal pos) if (qFuzzyCompare(normalizedPos, d->snapPos)) return; d->snapPos = normalizedPos; + d->updateHighlight(); d->fixOffset(); emit snapPositionChanged(); } +QDeclarativeComponent *QDeclarativePathView::highlight() const +{ + Q_D(const QDeclarativePathView); + return d->highlightComponent; +} + +void QDeclarativePathView::setHighlight(QDeclarativeComponent *highlight) +{ + Q_D(QDeclarativePathView); + if (highlight != d->highlightComponent) { + d->highlightComponent = highlight; + d->createHighlight(); + d->updateHighlight(); + emit highlightChanged(); + } +} + +QDeclarativeItem *QDeclarativePathView::highlightItem() +{ + Q_D(const QDeclarativePathView); + return d->highlightItem; +} + /*! \qmlproperty real PathView::dragMargin This property holds the maximum distance from the path that initiate mouse dragging. @@ -426,6 +559,52 @@ void QDeclarativePathView::setDragMargin(qreal dragMargin) } /*! + \qmlproperty real PathView::flickDeceleration + This property holds the rate at which a flick will decelerate. + + The default is 100. +*/ +qreal QDeclarativePathView::flickDeceleration() const +{ + Q_D(const QDeclarativePathView); + return d->deceleration; +} + +void QDeclarativePathView::setFlickDeceleration(qreal dec) +{ + Q_D(QDeclarativePathView); + if (d->deceleration == dec) + return; + d->deceleration = dec; + emit flickDecelerationChanged(); +} + +/*! + \qmlproperty bool PathView::interactive + + A user cannot drag or flick a PathView that is not interactive. + + This property is useful for temporarily disabling flicking. This allows + special interaction with PathView's children. +*/ +bool QDeclarativePathView::isInteractive() const +{ + Q_D(const QDeclarativePathView); + return d->interactive; +} + +void QDeclarativePathView::setInteractive(bool interactive) +{ + Q_D(QDeclarativePathView); + if (interactive != d->interactive) { + d->interactive = interactive; + if (!interactive) + d->tl.clear(); + emit interactiveChanged(); + } +} + +/*! \qmlproperty component PathView::delegate The delegate provides a template defining each item instantiated by the view. @@ -467,7 +646,7 @@ void QDeclarativePathView::setDelegate(QDeclarativeComponent *delegate) /*! \qmlproperty int PathView::pathItemCount - This property holds the number of items visible on the path at any one time + This property holds the number of items visible on the path at any one time. */ int QDeclarativePathView::pathItemCount() const { @@ -480,9 +659,13 @@ void QDeclarativePathView::setPathItemCount(int i) Q_D(QDeclarativePathView); if (i == d->pathItems) return; + if (i < 1) + i = 1; d->pathItems = i; - d->regenerate(); - pathItemCountChanged(); + if (d->isValid() && isComponentComplete()) { + d->regenerate(); + } + emit pathItemCountChanged(); } QPointF QDeclarativePathViewPrivate::pointNear(const QPointF &point, qreal *nearPercent) const @@ -512,7 +695,7 @@ QPointF QDeclarativePathViewPrivate::pointNear(const QPointF &point, qreal *near void QDeclarativePathView::mousePressEvent(QGraphicsSceneMouseEvent *event) { Q_D(QDeclarativePathView); - if (!d->items.count()) + if (!d->interactive || !d->items.count()) return; QPointF scenePoint = mapToScene(event->pos()); int idx = 0; @@ -542,7 +725,7 @@ void QDeclarativePathView::mousePressEvent(QGraphicsSceneMouseEvent *event) void QDeclarativePathView::mouseMoveEvent(QGraphicsSceneMouseEvent *event) { Q_D(QDeclarativePathView); - if (d->lastPosTime.isNull()) + if (!d->interactive || d->lastPosTime.isNull()) return; if (!d->stealMouse) { @@ -555,14 +738,14 @@ void QDeclarativePathView::mouseMoveEvent(QGraphicsSceneMouseEvent *event) d->moveReason = QDeclarativePathViewPrivate::Mouse; qreal newPc; d->pointNear(event->pos(), &newPc); - qreal diff = newPc - d->startPc; + qreal diff = (newPc - d->startPc)*d->model->count()*d->mappedRange; if (diff) { - setOffset(d->_offset + diff); + setOffset(d->offset + diff); - if (diff > 0.5) - diff -= 1.0; - else if (diff < -0.5) - diff += 1.0; + if (diff > d->model->count()/2) + diff -= d->model->count(); + else if (diff < -d->model->count()/2) + diff += d->model->count(); d->lastElapsed = QDeclarativeItemPrivate::restart(d->lastPosTime); d->lastDist = diff; @@ -574,27 +757,37 @@ void QDeclarativePathView::mouseMoveEvent(QGraphicsSceneMouseEvent *event) void QDeclarativePathView::mouseReleaseEvent(QGraphicsSceneMouseEvent *) { Q_D(QDeclarativePathView); - if (d->lastPosTime.isNull()) + d->stealMouse = false; + setKeepMouseGrab(false); + if (!d->interactive || d->lastPosTime.isNull()) return; qreal elapsed = qreal(d->lastElapsed + QDeclarativeItemPrivate::elapsed(d->lastPosTime)) / 1000.; qreal velocity = elapsed > 0. ? d->lastDist / elapsed : 0; - if (d->model && d->model->count() && qAbs(velocity) > 0.05) { - if (velocity > 1.5) - velocity = 1.5; - else if (velocity < -1.5) - velocity = -1.5; - qreal inc = qmlMod(d->_offset - d->snapPos, qreal(1.0 / d->model->count())); - qreal dist = qAbs(velocity/2 - qmlMod(velocity/2, qreal(1.0 / d->model->count()) - inc)); - d->moveOffset.setValue(d->_offset); - d->tl.accel(d->moveOffset, velocity, 0.1, dist); + if (d->model && d->model->count() && qAbs(velocity) > 1.) { + qreal count = d->pathItems == -1 ? d->model->count() : d->pathItems; + if (qAbs(velocity) > count * 2) // limit velocity + velocity = (velocity > 0 ? count : -count) * 2; + // Calculate the distance to be travelled + qreal v2 = velocity*velocity; + qreal accel = d->deceleration; + // + 0.25 to encourage moving at least one item in the flick direction + qreal dist = qMin(qreal(d->model->count()-1), d->model->count() * v2 / (accel * 2.0) + 0.25); + // round to nearest item. + if (velocity > 0.) + dist = qRound(dist + d->offset) - d->offset; + else + dist = qRound(dist - d->offset) + d->offset; + // Calculate accel required to stop on item boundary + accel = v2 / (2.0f * qAbs(dist)); + d->moveOffset.setValue(d->offset); + d->tl.accel(d->moveOffset, velocity, accel, dist); d->tl.callback(QDeclarativeTimeLineCallback(&d->moveOffset, d->fixOffsetCallback, d)); } else { d->fixOffset(); } d->lastPosTime = QTime(); - d->stealMouse = false; ungrabMouse(); } @@ -644,7 +837,8 @@ bool QDeclarativePathView::sendMouseEvent(QGraphicsSceneMouseEvent *event) bool QDeclarativePathView::sceneEventFilter(QGraphicsItem *i, QEvent *e) { - if (!isVisible()) + Q_D(QDeclarativePathView); + if (!isVisible() || !d->interactive) return QDeclarativeItem::sceneEventFilter(i, e); switch (e->type()) { @@ -669,72 +863,7 @@ void QDeclarativePathView::componentComplete() Q_D(QDeclarativePathView); QDeclarativeItem::componentComplete(); d->regenerate(); - - // move to correct offset - if (d->items.count()) { - int itemIndex = (d->currentIndex - d->firstIndex + d->model->count()) % d->model->count(); - - itemIndex += d->pathOffset; - itemIndex %= d->items.count(); - qreal targetOffset = qmlMod(1.0 + d->snapPos - qreal(itemIndex) / d->items.count(), qreal(1.0)); - - if (targetOffset < 0) - targetOffset = 1.0 + targetOffset; - if (targetOffset != d->_offset) { - d->moveOffset.setValue(targetOffset); - } - } -} - -void QDeclarativePathViewPrivate::regenerate() -{ - Q_Q(QDeclarativePathView); - if (!q->isComponentComplete()) - return; - - clear(); - - if (!isValid()) - return; - - if (firstIndex >= model->count()) - firstIndex = model->count()-1; - if (pathOffset >= model->count()) - pathOffset = model->count()-1; - - int numItems = pathItems >= 0 ? pathItems : model->count(); - for (int i=0; i < numItems && i < model->count(); ++i){ - int index = (i + firstIndex) % model->count(); - QDeclarativeItem *item = getItem(index); - if (!item) { - qWarning() << "PathView: Cannot create item, index" << (i + firstIndex) % model->count(); - return; - } - items.append(item); - item->setZValue(i); - qreal percent = qreal(i) / numItems + _offset; - percent = qAbs(qmlMod(percent, qreal(1.0))); - updateItem(item, percent); - model->completeItem(); - if (currentIndex == index) { - item->setFocus(true); - if (QDeclarativePathViewAttached *att = attached(item)) - att->setIsCurrentItem(true); - } - } - if (pathItems != -1) - q->refill(); -} - -void QDeclarativePathViewPrivate::updateItem(QDeclarativeItem *item, qreal percent) -{ - if (QDeclarativePathViewAttached *att = attached(item)) { - foreach(const QString &attr, path->attributes()) - att->setValue(attr.toUtf8(), path->attributeAt(attr, percent)); - } - QPointF pf = path->pointAt(percent); - item->setX(pf.x() - item->width()*item->scale()/2); - item->setY(pf.y() - item->height()*item->scale()/2); + d->updateHighlight(); } void QDeclarativePathView::refill() @@ -743,81 +872,85 @@ void QDeclarativePathView::refill() if (!d->isValid() || !isComponentComplete()) return; - QList<qreal> positions; - for (int i=0; i<d->items.count(); i++){ - qreal percent = qreal(i) / d->items.count(); - percent = percent + d->_offset; - percent = qmlMod(percent, qreal(1.0)); - positions << qAbs(percent); - } - - if (d->pathItems==-1) { - for (int i=0; i<positions.count(); i++) - d->updateItem(d->items.at(i), positions[i]); - return; +// qDebug() << "offset" << d->_offset; + + // first move existing items and remove items off path + int idx = d->firstIndex; + QList<QDeclarativeItem*>::iterator it = d->items.begin(); + while (it != d->items.end()) { + qreal pos = d->positionOfIndex(idx); + QDeclarativeItem *item = *it; + if (pos >= 0.0) { + d->updateItem(item, pos); + ++it; + } else { +// qDebug() << "release"; + d->updateItem(item, 1.0); + d->releaseItem(item); + if (it == d->items.begin()) { + if (++d->firstIndex >= d->model->count()) + d->firstIndex = 0; + } + it = d->items.erase(it); + } + ++idx; + if (idx >= d->model->count()) + idx = 0; } - QList<qreal> rotatedPositions; - for (int i=0; i<d->items.count(); i++) - rotatedPositions << positions[(i + d->pathOffset + d->items.count()) % d->items.count()]; - - int wrapIndex= -1; - for (int i=0; i<d->items.count()-1; i++) { - if (rotatedPositions[i] > rotatedPositions[i+1]){ - wrapIndex = i; - break; + // add items to beginning and end + int count = d->pathItems == -1 ? d->model->count() : qMin(d->pathItems, d->model->count()); + if (d->items.count() < count) { + int idx = qRound(d->model->count() - d->offset) % d->model->count(); + qreal startPos = d->snapPos; + if (d->firstIndex >= 0) { + startPos = d->positionOfIndex(d->firstIndex); + idx = (d->firstIndex + d->items.count()) % d->model->count(); } - } - if (wrapIndex != -1 ){ - //A wraparound has occured - if (wrapIndex < d->items.count()/2){ - while(wrapIndex-- >= 0){ - QDeclarativeItem* p = d->items.takeFirst(); - d->updateItem(p, 0.0); - d->releaseItem(p); - d->firstIndex++; - d->firstIndex %= d->model->count(); - int index = (d->firstIndex + d->items.count())%d->model->count(); - QDeclarativeItem *item = d->getItem(index); - item->setZValue(wrapIndex); - d->model->completeItem(); - if (d->currentIndex == index) { - item->setFocus(true); - if (QDeclarativePathViewAttached *att = d->attached(item)) - att->setIsCurrentItem(true); - } - d->items << item; - d->pathOffset++; - d->pathOffset=d->pathOffset % d->items.count(); + qreal pos = d->positionOfIndex(idx); + while ((pos > startPos || !d->items.count()) && d->items.count() < count) { +// qDebug() << "append" << idx; + QDeclarativeItem *item = d->getItem(idx); + item->setZValue(idx+1); + d->model->completeItem(); + if (d->currentIndex == idx) { + item->setFocus(true); + if (QDeclarativePathViewAttached *att = d->attached(item)) + att->setIsCurrentItem(true); } - } else { - while(wrapIndex++ < d->items.count()-1){ - QDeclarativeItem* p = d->items.takeLast(); - d->updateItem(p, 1.0); - d->releaseItem(p); - d->firstIndex--; - if (d->firstIndex < 0) - d->firstIndex = d->model->count() - 1; - QDeclarativeItem *item = d->getItem(d->firstIndex); - item->setZValue(d->firstIndex); - d->model->completeItem(); - if (d->currentIndex == d->firstIndex) { - item->setFocus(true); - if (QDeclarativePathViewAttached *att = d->attached(item)) - att->setIsCurrentItem(true); - } - d->items.prepend(item); - d->pathOffset--; - if (d->pathOffset < 0) - d->pathOffset = d->items.count() - 1; + if (d->items.count() == 0) + d->firstIndex = idx; + d->items.append(item); + d->updateItem(item, pos); + ++idx; + if (idx >= d->model->count()) + idx = 0; + pos = d->positionOfIndex(idx); + } + + idx = d->firstIndex - 1; + if (idx < 0) + idx = d->model->count() - 1; + pos = d->positionOfIndex(idx); + while (pos >= 0.0 && pos < startPos) { +// qDebug() << "prepend" << idx; + QDeclarativeItem *item = d->getItem(idx); + item->setZValue(idx+1); + d->model->completeItem(); + if (d->currentIndex == idx) { + item->setFocus(true); + if (QDeclarativePathViewAttached *att = d->attached(item)) + att->setIsCurrentItem(true); } + d->items.prepend(item); + d->updateItem(item, pos); + d->firstIndex = idx; + idx = d->firstIndex - 1; + if (idx < 0) + idx = d->model->count() - 1; + pos = d->positionOfIndex(idx); } - for (int i=0; i<d->items.count(); i++) - rotatedPositions[i] = positions[(i + d->pathOffset + d->items.count()) - % d->items.count()]; } - for (int i=0; i<d->items.count(); i++) - d->updateItem(d->items.at(i), rotatedPositions[i]); } void QDeclarativePathView::itemsInserted(int modelIndex, int count) @@ -826,29 +959,14 @@ void QDeclarativePathView::itemsInserted(int modelIndex, int count) Q_D(QDeclarativePathView); if (!d->isValid() || !isComponentComplete()) return; - if (d->pathItems == -1) { - for (int i = 0; i < count; ++i) { - QDeclarativeItem *item = d->getItem(modelIndex + i); - item->setZValue(modelIndex + i); - d->model->completeItem(); - d->items.insert(modelIndex + i, item); - } - refill(); - } else { - //XXX This is pretty heavy handed until we reference count items. - d->regenerate(); - } - // make sure the current item is still at the snap position - int itemIndex = (d->currentIndex - d->firstIndex + d->model->count())%d->model->count(); - itemIndex += d->pathOffset; - itemIndex %= d->items.count(); - qreal targetOffset = qmlMod(1.0 + d->snapPos - qreal(itemIndex) / d->items.count(), qreal(1.0)); - - if (targetOffset < 0) - targetOffset = 1.0 + targetOffset; - if (targetOffset != d->_offset) - d->moveOffset.setValue(targetOffset); + QList<QDeclarativeItem *> removedItems = d->items; + d->items.clear(); + d->regenerate(); + while (removedItems.count()) + d->releaseItem(removedItems.takeLast()); + d->updateCurrent(); + emit countChanged(); } void QDeclarativePathView::itemsRemoved(int modelIndex, int count) @@ -857,41 +975,37 @@ void QDeclarativePathView::itemsRemoved(int modelIndex, int count) Q_D(QDeclarativePathView); if (!d->isValid() || !isComponentComplete()) return; - if (d->pathItems == -1) { - for (int i = 0; i < count && d->items.count() > modelIndex; ++i) { - QDeclarativeItem* p = d->items.takeAt(modelIndex); - d->model->release(p); - } - d->snapToCurrent(); - refill(); - } else { - d->regenerate(); - } - if (d->model->count() == 0) { - d->currentIndex = -1; - d->moveOffset.setValue(0); + QList<QDeclarativeItem *> removedItems = d->items; + d->items.clear(); + if (d->offset >= d->model->count()) + d->offset = d->model->count() - 1; + d->regenerate(); + while (removedItems.count()) + d->releaseItem(removedItems.takeLast()); + d->updateCurrent(); + emit countChanged(); +} + +void QDeclarativePathView::itemsMoved(int from, int to, int count) +{ + Q_D(QDeclarativePathView); + if (!d->isValid() || !isComponentComplete()) return; - } - // make sure the current item is still at the snap position - if (d->currentIndex >= d->model->count()) - d->currentIndex = d->model->count() - 1; - int itemIndex = (d->currentIndex - d->firstIndex + d->model->count())%d->model->count(); - itemIndex += d->pathOffset; - itemIndex %= d->items.count(); - qreal targetOffset = qmlMod(1.0 + d->snapPos - qreal(itemIndex) / d->items.count(), qreal(1.0)); - - if (targetOffset < 0) - targetOffset = 1.0 + targetOffset; - if (targetOffset != d->_offset) - d->moveOffset.setValue(targetOffset); + QList<QDeclarativeItem *> removedItems = d->items; + d->items.clear(); + d->regenerate(); + while (removedItems.count()) + d->releaseItem(removedItems.takeLast()); + d->updateCurrent(); } void QDeclarativePathView::modelReset() { Q_D(QDeclarativePathView); d->regenerate(); + emit countChanged(); } void QDeclarativePathView::createdItem(int index, QDeclarativeItem *item) @@ -919,36 +1033,10 @@ int QDeclarativePathViewPrivate::calcCurrentIndex() { int current = -1; if (model && items.count()) { - _offset = qmlMod(_offset, qreal(1.0)); - if (_offset < 0) - _offset += 1.0; - - if (pathItems == -1) { - qreal delta = qmlMod(_offset - snapPos, qreal(1.0)); - if (delta < 0) - delta = 1.0 + delta; - int ii = model->count() - qRound(delta * model->count()); - if (ii < 0) - ii = 0; - current = ii; - } else { - qreal bestDiff=1e9; - int bestI=-1; - for (int i=0; i<items.count(); i++){ - qreal percent = qreal(i) / items.count(); - percent = percent + _offset; - percent = qmlMod(percent, qreal(1.0)); - qreal diff = qAbs(snapPos - percent); - if (diff < bestDiff){ - bestDiff = diff; - bestI = i; - } - } - int modelIndex = (bestI - pathOffset + items.count())%items.count(); - modelIndex += firstIndex; - current = modelIndex; - } - current = qAbs(current % model->count()); + offset = qmlMod(offset, model->count()); + if (offset < 0) + offset += model->count(); + current = qRound(qAbs(qmlMod(model->count() - offset, model->count()))); } return current; @@ -1002,57 +1090,26 @@ void QDeclarativePathViewPrivate::snapToCurrent() if (!model || model->count() <= 0) return; - int itemIndex = (currentIndex - firstIndex + model->count()) % model->count(); - - //Rounds is the number of times round to make the current item visible - int rounds = itemIndex / items.count(); - int otherWayRounds = (model->count() - (itemIndex)) / items.count(); - if (otherWayRounds < rounds) - rounds = -otherWayRounds; - - itemIndex += pathOffset; - if(model->count() % items.count() && itemIndex - model->count() + items.count() > 0){ - //When model.count() is not a multiple of pathItemCount we need to manually - //fix the index so that going backwards one step works correctly. - itemIndex = itemIndex - model->count() + items.count(); - } - itemIndex %= items.count(); - qreal targetOffset = qmlMod(1.0 + snapPos - qreal(itemIndex) / items.count(), qreal(1.0)); - - if (targetOffset < 0) - targetOffset = 1.0 + targetOffset; - if (targetOffset == _offset && rounds == 0) - return; + qreal targetOffset = model->count() - currentIndex; moveReason = Other; tl.clear(); - moveOffset.setValue(_offset); - - if (rounds!=0){ - //Compensate if the targetOffset would bring the target in from off the screen - qreal distance = targetOffset - _offset; - if (distance <= -0.5) - rounds--; - if (distance > 0.5) - rounds++; - tl.move(moveOffset, targetOffset -rounds, QEasingCurve(QEasingCurve::InOutQuad), - int(items.count()*qMax((qreal)(2.0/items.count()),(qreal)qAbs(rounds)))); - tl.callback(QDeclarativeTimeLineCallback(&moveOffset, fixOffsetCallback, this)); - return; - } - - if (targetOffset - _offset > 0.5) { - qreal distance = 1 - targetOffset + _offset; - tl.move(moveOffset, 0.0, QEasingCurve(QEasingCurve::OutQuad), int(200 * _offset / distance)); - tl.set(moveOffset, 1.0); - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InQuad), int(200 * (1.0-targetOffset) / distance)); - } else if (targetOffset - _offset <= -0.5) { - qreal distance = 1 - _offset + targetOffset; - tl.move(moveOffset, 1.0, QEasingCurve(QEasingCurve::OutQuad), int(200 * (1.0-_offset) / distance)); + moveOffset.setValue(offset); + + const int duration = 300; + + if (targetOffset - offset > model->count()/2) { + qreal distance = model->count() - targetOffset + offset; + tl.move(moveOffset, 0.0, QEasingCurve(QEasingCurve::InQuad), int(duration * offset / distance)); + tl.set(moveOffset, model->count()); + tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::OutQuad), int(duration * (model->count()-targetOffset) / distance)); + } else if (targetOffset - offset <= -model->count()/2) { + qreal distance = model->count() - offset + targetOffset; + tl.move(moveOffset, model->count(), QEasingCurve(QEasingCurve::InQuad), int(duration * (model->count()-offset) / distance)); tl.set(moveOffset, 0.0); - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InQuad), int(200 * targetOffset / distance)); + tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::OutQuad), int(duration * targetOffset / distance)); } else { - tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InOutQuad), 200); + tl.move(moveOffset, targetOffset, QEasingCurve(QEasingCurve::InOutQuad), duration); } } |