[FIXED] Render problem - white window

[szulak]

Hello,

I am having a trouble with showing main window just after CEF has finished loading url. I am creating a main window, and calling ShowWindow(SW_HIDE) on it. Later, in CefLoadHandler::OnLoadEnd() method, I am sending an event to notify main window, that loading page has finished, and it's ready to "appear" for user. Here is a code (it's MFC project):

Code: Select all

void CMainWindow::handlePageLoaded(...)
{   
   ShowWindow(SW_SHOW);
   UpdateWindow();
}


As soon as "UpdateWindow();" is reached, the main window is either loaded with blank white page, or with loaded page. It's completely random. Does anyone have any idea, what might cause this problem? It's worth to mention, that CEF window is wrapped into standalone control (it inherits from CWnd), and CMainWindow has this control as a member.

Regards,
szulak

[magreenblatt]

What CEF version?

[Liosan]

Hi,

We are using CEF version 3.1650.1562_windows32.

Liosan

[magreenblatt]

Are you sure OnLoadEnd is being called? You might have better results using OnLoadingStateChange.

[Liosan]

Are you sure OnLoadEnd is being called?

Yes, sure:

As soon as "UpdateWindow();" is reached, the main window is either loaded with blank white page, or with loaded page.

This happens after OnLoadEnd(). We even had some logs to confirm it

You might have better results using OnLoadingStateChange.

How is this different? Is OnLoadEnd broken?

Liosan

[magreenblatt]

How is this different? Is OnLoadEnd broken?

See https://code.google.com/p/chromiumembed ... il?id=1050.

[szulak]

How is this different? Is OnLoadEnd broken?

See https://code.google.com/p/chromiumembed ... il?id=1050.

Unfortunately, it doesn't solve our problem. In our case, OnLoadEnd() handler is being called, but there is some rendering problem - CEF's window is white, but as soon as I move a mouse cursor above any element of website, the CEF's window is redrawn correctly.

Moreover, I have got another question: is it possible to show second CEF's window above first one?

Thank you for answer,
szulak

[magreenblatt]

is it possible to show second CEF's window above first one?

Yes, it's possible.

[szulak]

Hello,

We are having the same issue still. Here is window (white content is a CEF window with loaded page). Does anyone have any idea how can I debug / fix it? Below a screenshot of loaded CEF window. We are using CEF version 3.1650.1562_windows32, problem appears on Windows 8.1.



Best regards,
szulak

[szulak]

hello,

we have finally fixed this issue (which was not related to CEF itself). The following line added to OnBeforeCommandLineProcessing handler made it work:

Code: Select all

command_line->AppendSwitch("disable-gpu");

regards,
szulak