Determine If Print/Cancel Button in Google Chrome's Print Preview is Clicked

问题

I've been printing my page using the code below:

window.print();

An image below is what the print preview in Google chrome browser looks like. It has two main buttons: print and cancel.

I want to know if the user has clicked the print or cancel buttons. What I did uses jquery:

HTML Code of the Print Preview:

<button class="print default" i18n-content="printButton">Print</button>
<button class="cancel" i18n-content="cancel">Cancel</button>

Jquery Code:

 $('button > .cancel').click(function (e) {                
      alert('Cancel');
 });

 $('button > .print').click(function (e) {                
      alert('Print');
 });

I tried the code above with no luck. What am I missing?

回答1:

You can not access Chrome's internal windows (printing dialog in this case) directly from a regular web page.

    (function () {

        var beforePrint = function () {
            alert('Functionality to run before printing.');
        };

        var afterPrint = function () {
            alert('Functionality to run after printing');
        };

        if (window.matchMedia) {
            var mediaQueryList = window.matchMedia('print');

            mediaQueryList.addListener(function (mql) {
                //alert($(mediaQueryList).html());
                if (mql.matches) {
                    beforePrint();
                } else {
                    afterPrint();
                }
            });
        }

        window.onbeforeprint = beforePrint;
        window.onafterprint = afterPrint;

    }());

Or, If you want to do something when the print preview gets opened, you can try below:

$(document).bind("keyup keydown", function (e) {
         if (e.ctrlKey && e.keyCode == 80) {
             setTimeout(function () { CallAfterWindowLoad();}, 5000);
             return true;
         }
     });

    function CallAfterWindowLoad()
    {
        alert("Open and call");
    }

Reference: How to capture the click event on the default print menu called by Javascript window.print()

Maybe if you provide your requirements for this two buttons click event, we can provide you an alternate solution.

回答2:

it is very easily possible:

<body onafterprint="myFunction()">

The myFunction() that you can define within a tag will be fire when either the printing job is done or the cancel button was pressed.

回答3:

As far as I know, the print preview is not part of any document your JS can access. These might interest you:

Detecting browser print event

ExtJS 4 - detecting if the user pressed "Print" on the print dialog that was called programatically

回答4:

This should do the trick. I've used jQuery v2.2.0 which is included in the html file.

$("#print").click(function() { // calls the id of the button that will print
    document.body.style.visibility = 'hidden'; //code for hiding the body
    document.getElementById('printthis').style.visibility = 'visible'; // div to be printed
    document.getElementById('printthis').style.position = 'absolute'; //some code/css for positioning. you can adjust this
    document.getElementById('printthis').style.top = '40px';
    document.getElementById('printthis').style.left = '0px';
    if (print()) { // shows print preview.

    } else { // else statement will check if cancel button is clicked.
        document.body.style.visibility = 'visible';
        document.getElementById('printthis').style.position = '';
        document.getElementById('printthis').style.top = '';
        document.getElementById('printthis').style.left = '';
        alert("Print Canceled");
    }
});

I guess this might as well be used as a way to print certain divs in your html. Just hide the body element and only show the div that you want to print with some positioning css. Hope it works in yours. I've tried it and I can say that it worked for me.

来源：https://stackoverflow.com/questions/29912933/determine-if-print-cancel-button-in-google-chromes-print-preview-is-clicked

标签

javascript

jquery

html

google-chrome

printing-web-page