使用动态网址打印到Google云打印 [英] Print to Google Cloud Print with dynamic URL

问题描述

我想在我的网站上使用打印按钮来打印带有Google云打印的文档，但我希望目标的网址 - PDF文件 - 在按钮被删除后动态更改点击（特别是根据AJAX调用返回的内容）。

I'd like a "print" button on my web-site to print a document with Google Cloud Print, but I want the "url" of the target – a PDF file – to change dynamically, after the button has been clicked (notably, based on what's returned from an AJAX call).

GCP Web元素（GCPWE）似乎具有类似的功能，但不是我想要的。特别是，似乎只能在单击按钮之前更改目标（通过调用 setPrintDocument ）。

The GCP Web Element (GCPWE) seems to have similar functionality, but not quite what I desire. In particular, it seems as though one can only change the "target" (by calling setPrintDocument) before the button is clicked.

点击按钮后有没有办法指定GCPWE的URL？

Is there a way to specify the URL for GCPWE after the button has been clicked?

以下是GCPWE网站的示例代码：

Here's the example code from the GCPWE site:

<div id="print_button_container"> </div>


<script src="http://www.google.com/cloudprint/client/cpgadget.js">
</script>
<script defer="defer">
    var gadget = new cloudprint.Gadget();
    gadget.setPrintButton(
          cloudprint.Gadget.createDefaultPrintButton("print_button_container"));
    gadget.setPrintDocument("url", "[document title]", "[document URL]");
</script>

我考虑隐藏< div id ='print_button_container'> ; 并在点击可见的打印按钮后触发 .click 事件，但这似乎相当不优雅&不当。我已经查看了上面链接的 gpwidget.js ，但是代码已经被最小化并且无法理解（对我来说，无论如何）。

I've considered hiding the <div id='print_button_container'> and triggering a .click event on it after a visible print button has been clicked, but this seems rather inelegant & improper. I've looked at the gpwidget.js linked to above, but the code has been minimized and is unintelligible (to me, at any rate).

我想要的是一个Javascript print 函数，您传递了[文档URL]和[文档标题]到。

What I seem to desire is a Javascript print function that you pass a [document URL] and [document title] to.

有没有更好的方法来实现所需的功能，而不是点击隐藏的按钮我想出了什么？

Is there a better way to achieve the desired functionality, rather than the 'clicking the hidden button' I've come up with?

感谢您阅读。

推荐答案

您可以随时打开打印对话框，只需致电：

You can open print dialog whenever you want that, just call:

gadget.openPrintDialog()

，这将打开打印机对话框。
因此，对于您的情况，您可能希望使用静态方法创建打印按钮：

and that will open printer dialog. So for your case you might want to create print button using static method:

cloudprint.Gadget.createDefaultPrintButton("print_button_container");

然后附上按钮的自定义处理程序，无论何时准备好，只需致电：

then attach custom handlers for the button, and whenever you are ready just call:

var gadget = new cloudprint.Gadget();
gadget.setPrintDocument(...);
gadget.openPrintDialog();

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