本文整理汇总了C++中Layer::GetFirstChild方法的典型用法代码示例。如果您正苦于以下问题：C++ Layer::GetFirstChild方法的具体用法？C++ Layer::GetFirstChild怎么用？C++ Layer::GetFirstChild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Layer的用法示例。
在下文中一共展示了Layer::GetFirstChild方法的1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: while
// Do a breadth-first search to find the first layer in the tree that is
// scrollable.
Layer*
CompositorParent::GetPrimaryScrollableLayer()
{
Layer* root = mLayerManager->GetRoot();
// FIXME: We're currently getting passed layers that are not part of our content, but
// we are drawing them anyway. This is causing severe rendering corruption to our background
// and checkerboarding. The real fix here is to assert that we don't have any useless layers
// and ensure that layout isn't giving us any. This is being tracked in bug 728284.
// For now just clip them to the empty rect so we don't draw them.
Layer* discardLayer = root->GetFirstChild();
while (discardLayer) {
if (!discardLayer->AsContainerLayer()) {
discardLayer->IntersectClipRect(nsIntRect());
SetShadowProperties(discardLayer);
}
discardLayer = discardLayer->GetNextSibling();
}
nsTArray<Layer*> queue;
queue.AppendElement(root);
while (queue.Length()) {
ContainerLayer* containerLayer = queue[0]->AsContainerLayer();
queue.RemoveElementAt(0);
if (!containerLayer) {
continue;
}
const FrameMetrics& frameMetrics = containerLayer->GetFrameMetrics();
if (frameMetrics.IsScrollable()) {
return containerLayer;
}
Layer* child = containerLayer->GetFirstChild();
while (child) {
queue.AppendElement(child);
child = child->GetNextSibling();
}
}
return root;
}