本文整理汇总了C++中HTMLCanvasElement::GetMozPrintCallback方法的典型用法代码示例。如果您正苦于以下问题：C++ HTMLCanvasElement::GetMozPrintCallback方法的具体用法？C++ HTMLCanvasElement::GetMozPrintCallback怎么用？C++ HTMLCanvasElement::GetMozPrintCallback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HTMLCanvasElement的用法示例。
在下文中一共展示了HTMLCanvasElement::GetMozPrintCallback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: GetPrintCanvasElementsInFrame
void
GetPrintCanvasElementsInFrame(nsIFrame* aFrame, nsTArray<nsRefPtr<HTMLCanvasElement> >* aArr)
{
if (!aFrame) {
return;
}
for (nsIFrame::ChildListIterator childLists(aFrame);
!childLists.IsDone(); childLists.Next()) {
nsFrameList children = childLists.CurrentList();
for (nsFrameList::Enumerator e(children); !e.AtEnd(); e.Next()) {
nsIFrame* child = e.get();
// Check if child is a nsHTMLCanvasFrame.
nsHTMLCanvasFrame* canvasFrame = do_QueryFrame(child);
// If there is a canvasFrame, try to get actual canvas element.
if (canvasFrame) {
HTMLCanvasElement* canvas =
HTMLCanvasElement::FromContentOrNull(canvasFrame->GetContent());
if (canvas && canvas->GetMozPrintCallback()) {
aArr->AppendElement(canvas);
continue;
}
}
if (!child->GetFirstPrincipalChild()) {
nsSubDocumentFrame* subdocumentFrame = do_QueryFrame(child);
if (subdocumentFrame) {
// Descend into the subdocument
nsIFrame* root = subdocumentFrame->GetSubdocumentRootFrame();
child = root;
}
}
// The current child is not a nsHTMLCanvasFrame OR it is but there is
// no HTMLCanvasElement on it. Check if children of `child` might
// contain a HTMLCanvasElement.
GetPrintCanvasElementsInFrame(child, aArr);
}
}
}