Not working on WebGL build?

JoeriBultheel commented 7 years ago

Seems to not be working for WebGL builds?

I get this error in my javascript console:

... etc

gkngkc commented 7 years ago

I don't know exact cause, but this kind of exception is thrown when plugin js code unable find a method in c# side, so be sure "OnFileUploaded" or "OnFileDownloaded" (whichever you using) exist in caller script.

But again, i didn't test webgl much and it's probably buggy.

JoeriBultheel commented 7 years ago

Hm,

No I don't have any of those methods in my C# scripts... I can also not find any documentation on it. Is it part of the WWW or WWWForm classes? I can't find any method within unity with such names...

Thnx!

gkngkc commented 7 years ago

Sorry about undocumented code, those are my plugin methods called in here and here

Unity handles js communication with "SendMessage" and it needs a gameobject name and a method name to be able to call back. I'm sending gameobject name as parameter but method names are hardcoded. I should make them parameter too.

JoeriBultheel commented 7 years ago

Hey @gkngkc No worries, thank you so much for the fast answer!

I need it kind of urgently working on WebGL.

Could you just please explain me clearly what I should do next? On the same script that is calling the method "string path = StandaloneFileBrowser.OpenFilePanel("Open File", "", "", false)[0];" there should be a method "OnFileUploaded" or "OnFileDownloaded" ? What is the exact method signature? What should I implement in the body?

Thank you!!!

gkngkc commented 7 years ago

Due to browser limitations WebGL requires more work to open file dialog. It's not working with default "StandaloneFileBrowser.OpenFilePanel" call. You can find canvas upload/download examples at samples page

Browsers doesn't allow opening file dialogs unless user clicks a html element on page. Because of that, you need to call js plugin at Unity's "OnPointerDown" method. Plugin creates a html element and opens file dialog when user releases mouse, then js plugin calls unity side with sendmessage etc. It's a bit tricky but only way to open file dialogs on browsers

gkngkc commented 7 years ago

By the way, it's only supported by latest versions of chrome and firefox.

JoeriBultheel commented 7 years ago

heyhey, I got it semi working. The file browser is appearing. But now i get an error when clicking 'ok'. Any idea what it could mean?

gkngkc commented 7 years ago

Looks like SendMessage throws the exception. Does your script's method name matches with js plugin's SendMessage parameter?

If it does, there is a chance that unity is stripping your methods.

JoeriBultheel commented 7 years ago

I think so,

I'm just using the method names of the example script like this :

    //
    // WebGL
    //
    [DllImport("__Internal")]
    private static extern void UploadFile(string id);

    public void OnPointerDown(PointerEventData eventData) {
    UploadFile(gameObject.name);
    }

    // Called from browser
    public void OnFileUploaded(string url) {
    StartCoroutine(OutputRoutine(url));
    }

gkngkc / UnityStandaloneFileBrowser

Not working on WebGL build? #11