本文整理汇总了C++中ScrollingStateNode::parent方法的典型用法代码示例。如果您正苦于以下问题：C++ ScrollingStateNode::parent方法的具体用法？C++ ScrollingStateNode::parent怎么用？C++ ScrollingStateNode::parent使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类ScrollingStateNode的用法示例。
在下文中一共展示了ScrollingStateNode::parent方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: frameViewForScrollingNode
FrameView* AsyncScrollingCoordinator::frameViewForScrollingNode(ScrollingNodeID scrollingNodeID) const
{
if (!m_scrollingStateTree->rootStateNode())
return nullptr;
if (scrollingNodeID == m_scrollingStateTree->rootStateNode()->scrollingNodeID())
return m_page->mainFrame().view();
ScrollingStateNode* stateNode = m_scrollingStateTree->stateNodeForID(scrollingNodeID);
if (!stateNode)
return nullptr;
// Find the enclosing frame scrolling node.
ScrollingStateNode* parentNode = stateNode;
while (parentNode && parentNode->nodeType() != FrameScrollingNode)
parentNode = parentNode->parent();
if (!parentNode)
return nullptr;
// Walk the frame tree to find the matching FrameView. This is not ideal, but avoids back pointers to FrameViews
// from ScrollingTreeStateNodes.
for (Frame* frame = &m_page->mainFrame(); frame; frame = frame->tree().traverseNext()) {
if (FrameView* view = frame->view()) {
if (view->scrollLayerID() == parentNode->scrollingNodeID())
return view;
}
}
return nullptr;
}示例2: decode
bool RemoteScrollingCoordinatorTransaction::decode(IPC::ArgumentDecoder& decoder)
{
int numNodes;
if (!decoder.decode(numNodes))
return false;
bool hasNewRootNode;
if (!decoder.decode(hasNewRootNode))
return false;
m_scrollingStateTree = ScrollingStateTree::create();
for (int i = 0; i < numNodes; ++i) {
ScrollingNodeType nodeType;
if (!decoder.decodeEnum(nodeType))
return false;
ScrollingNodeID nodeID;
if (!decoder.decode(nodeID))
return false;
ScrollingNodeID parentNodeID;
if (!decoder.decode(parentNodeID))
return false;
m_scrollingStateTree->attachNode(nodeType, nodeID, parentNodeID);
ScrollingStateNode* newNode = m_scrollingStateTree->stateNodeForID(nodeID);
ASSERT(newNode);
ASSERT(!parentNodeID || newNode->parent());
switch (nodeType) {
case FrameScrollingNode:
case OverflowScrollingNode:
if (!decoder.decode(*toScrollingStateScrollingNode(newNode)))
return false;
break;
case FixedNode:
if (!decoder.decode(*toScrollingStateFixedNode(newNode)))
return false;
break;
case StickyNode:
if (!decoder.decode(*toScrollingStateStickyNode(newNode)))
return false;
break;
}
}
m_scrollingStateTree->setHasNewRootStateNode(hasNewRootNode);
// Removed nodes
Vector<ScrollingNodeID> removedNodes;
if (!decoder.decode(removedNodes))
return false;
if (removedNodes.size())
m_scrollingStateTree->setRemovedNodes(removedNodes);
return true;
}