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I'm using plupload to client scaling of pictures before they are uploaded. I like the feature that it gracefully falls back to html4 if the user doesn't have flash, silverlight etc engines installed.

I want to be able to start the upload when the user clicks certain elements on the page and i want to handle the events (sometimes stopping a file dialog from opening). In fact i'd like to pop open the file dialog using javascript.

Ok, so HTML4 (or rather the browser, except chrome :P) won't let me do this, unless the user clicks a browse-button (or an overlay covering a browse-button), so when i get the fallback to HTML4 i'll accept that i can't do it, but most users will have flash or silverlight installed and they do not have this restriction. So my question is this:

How do i trigger the file open dialog in plupload (keeping in mind i only need the flash and silverlight engines to do this).

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3 Answers

up vote 1 down vote

Hey Per Hornshøj-Schierbeck,

Read your problem.

I found some articles that may help to figure this out. check them. It may help...!

01. In JavaScript can I make a "click" event fire programmatically for a file input element?

02. open file dialog box in javascript

Regards, ADynaMic

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Both your solutions are concerning javascript/html4 and neither actually work for the situation i need. I know my question is pretty specific, but i only need this functionality in pluploads silverlight and flash engines, not in html4 – Per Hornshøj-Schierbeck Mar 15 '11 at 22:47
up vote 1 down vote accepted

Ok. It doesn't seem possible to do this, so unless someone implements event handles for the silverlight and flash components i'm out of luck

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1  
Actually Flash and Silverlight won't let you to trigger file dialog programmatically. It is allowed to happen only as a reaction to some event like mouse click (help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/…). – jayarjo Apr 5 at 11:56
up vote 1 down vote

If someone is searching for the HTML5 solution, here it is:

var up= $('#uploader').pluploadQueue();
if (up.features.triggerDialog) {
    plupload.addEvent(document.getElementById('idOtherButton'), 'click', function(e) {
        var input = document.getElementById(up.id + '_html5');
        if (input && !input.disabled) { // for some reason FF (up to 8.0.1 so far) lets to click disabled input[type=file]
            input.click();
        }
        e.preventDefault();
    }); 
}
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