C++ (Cpp) LayerChromium::setScrollPosition Exemples

Exemple #1

void CCLayerTreeHost::applyScrollAndScale(const CCScrollAndScaleSet& info)
{
    if (!m_rootLayer)
        return;

    LayerChromium* rootScrollLayer = findFirstScrollableLayer(m_rootLayer.get());
    IntSize rootScrollDelta;

    for (size_t i = 0; i < info.scrolls.size(); ++i) {
        LayerChromium* layer = CCLayerTreeHostCommon::findLayerInSubtree(m_rootLayer.get(), info.scrolls[i].layerId);
        if (!layer)
            continue;
        if (layer == rootScrollLayer)
            rootScrollDelta += info.scrolls[i].scrollDelta;
        else
            layer->setScrollPosition(layer->scrollPosition() + info.scrolls[i].scrollDelta);
    }
    if (!rootScrollDelta.isZero() || info.pageScaleDelta != 1)
        m_client->applyScrollAndScale(rootScrollDelta, info.pageScaleDelta);
}