在 chrome 中从 javascript 打印：如何知道打印完成？
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Printing from javascript in chrome: how to know printing is done?
提问by Pl4n3
In my chrome browser version 17.0.942.0 winvista the printdlg is not the usual modal system-printdlg but renderered within the websiteitself. So I want to print canvas content as described here. But the code
在我的 chrome 浏览器版本 17.0.942.0 winvista 中，printdlg 不是通常的模态 system-printdlg，而是在网站本身内呈现的。所以我想打印这里描述的画布内容。但是代码
window.print();
window.close();
window.print();
window.close();
wont work, because window.closealso closes the printdlg. So in chrome window.closemust be initiated by the user or delayed somehow. Is there a way to know if window.printwas finished, so that the window can be closed automatically?
不会工作，因为window.close也会关闭printdlg。所以在 chrome 中window.close必须由用户启动或以某种方式延迟。有没有办法知道是否window.print完成，以便窗口可以自动关闭？
采纳答案by TehWan
Check this comment on a bug report similar to what you are experiencing: http://code.google.com/p/chromium/issues/detail?id=92107#c31
在类似于您遇到的错误报告中查看此评论：http: //code.google.com/p/chromium/issues/detail?id=92107#c31
It seems like window.printis async, the workaround is to check for a mouse movement event after the print, which would occur when the print dialog is closed, then you can perform the rest of your actions.
似乎window.print是异步的，解决方法是在打印后检查鼠标移动事件，这会在打印对话框关闭时发生，然后您可以执行其余操作。
Also see: Chrome window.print() window.close() results in 'print preview failed'. Solution?
回答by Peru
add this script to your popup print window
将此脚本添加到您的弹出打印窗口
<script src="/assets/print_window_close.js" type="text/javascript"></script>
contents of print_window_close.js is
print_window_close.js 的内容是
jQuery(document).ready(function() {
setTimeout(function() {
window.close();
}, 1);
});
basically seTimeout is called only when the document is focused which happens only when the overlay print dialog is closed. hence this works exactly the same way you wanted.
基本上 seTimeout 仅在文档被聚焦时调用，这仅在覆盖打印对话框关闭时发生。因此，这与您想要的方式完全相同。
回答by arioch1984
You could try to use window.onafterprint. For example:
您可以尝试使用 window.onafterprint。例如：
window.onafterprint = function(){console.log('Print finished...')}
Then you could find more details in this post: http://tjvantoll.com/2012/06/15/detecting-print-requests-with-javascript/
然后你可以在这篇文章中找到更多细节：http: //tjvantoll.com/2012/06/15/detecting-print-requests-with-javascript/
回答by Vagner do Carmo
That works for me, you have to make listeners to print event: https://gist.github.com/vluzrmos/085975de3e1840936604
这对我有用，你必须让听众打印事件：https: //gist.github.com/vluzrmos/085975de3e1840936604
