Ejemplo n.º 1
0
void QDeclarativeBasePositioner::prePositioning()
{
    Q_D(QDeclarativeBasePositioner);
    if (!isComponentComplete())
        return;

    d->queuedPositioning = false;
    //Need to order children by creation order modified by stacking order
    QList<QGraphicsItem *> children = d->QGraphicsItemPrivate::children;
    qSort(children.begin(), children.end(), d->insertionOrder);

    QPODVector<PositionedItem,8> oldItems;
    positionedItems.copyAndClear(oldItems);
    for (int ii = 0; ii < children.count(); ++ii) {
        QDeclarativeItem *child = qobject_cast<QDeclarativeItem *>(children.at(ii));
        if (!child)
            continue;
        PositionedItem *item = 0;
        PositionedItem posItem(child);
        int wIdx = oldItems.find(posItem);
        if (wIdx < 0) {
            d->watchChanges(child);
            positionedItems.append(posItem);
            item = &positionedItems[positionedItems.count()-1];
            item->isNew = true;
            if (child->opacity() <= 0.0 || !child->isVisible())
                item->isVisible = false;
        } else {
            item = &oldItems[wIdx];
            if (child->opacity() <= 0.0 || !child->isVisible()) {
                item->isVisible = false;
            } else if (!item->isVisible) {
                item->isVisible = true;
                item->isNew = true;
            } else {
                item->isNew = false;
            }
            positionedItems.append(*item);
        }
    }
    doPositioning();
    if(d->addTransition || d->moveTransition)
        finishApplyTransitions();
    //Set implicit size to the size of its children
    qreal h = 0.0f;
    qreal w = 0.0f;
    for (int i = 0; i < positionedItems.count(); ++i) {
        const PositionedItem &posItem = positionedItems.at(i);
        if (posItem.isVisible) {
            h = qMax(h, posItem.item->y() + posItem.item->height());
            w = qMax(w, posItem.item->x() + posItem.item->width());
        }
    }
    setImplicitHeight(h);
    setImplicitWidth(w);
}
void QDeclarativeBasePositioner::prePositioning()
{
    Q_D(QDeclarativeBasePositioner);
    if (!isComponentComplete())
        return;

    if (d->doingPositioning)
        return;

    d->queuedPositioning = false;
    d->doingPositioning = true;
    //Need to order children by creation order modified by stacking order
    QList<QGraphicsItem *> children = d->QGraphicsItemPrivate::children;
    qSort(children.begin(), children.end(), d->insertionOrder);

    QPODVector<PositionedItem,8> oldItems;
    positionedItems.copyAndClear(oldItems);
    for (int ii = 0; ii < children.count(); ++ii) {
        QDeclarativeItem *child = qobject_cast<QDeclarativeItem *>(children.at(ii));
        if (!child)
            continue;
        QDeclarativeItemPrivate *childPrivate = static_cast<QDeclarativeItemPrivate*>(QGraphicsItemPrivate::get(child));
        PositionedItem *item = 0;
        PositionedItem posItem(child);
        int wIdx = oldItems.find(posItem);
        if (wIdx < 0) {
            d->watchChanges(child);
            positionedItems.append(posItem);
            item = &positionedItems[positionedItems.count()-1];
            item->isNew = true;
            if (child->opacity() <= 0.0 || childPrivate->explicitlyHidden)
                item->isVisible = false;
        } else {
            item = &oldItems[wIdx];
            // Items are only omitted from positioning if they are explicitly hidden
            // i.e. their positioning is not affected if an ancestor is hidden.
            if (child->opacity() <= 0.0 || childPrivate->explicitlyHidden) {
                item->isVisible = false;
            } else if (!item->isVisible) {
                item->isVisible = true;
                item->isNew = true;
            } else {
                item->isNew = false;
            }
            positionedItems.append(*item);
        }
    }
    QSizeF contentSize;
    doPositioning(&contentSize);
    if(d->addTransition || d->moveTransition)
        finishApplyTransitions();
    d->doingPositioning = false;
    //Set implicit size to the size of its children
    setImplicitHeight(contentSize.height());
    setImplicitWidth(contentSize.width());
}