CEF Latest build borderless window

[otoshimono]

Hello!

I am new to CEF and I have just gotten the latest branch up and running.
I am working with cefsimple for now. I was looking for a way to request a borderless window, but I couldn't find any.

Any pointers?

Best regards

[magreenblatt]

What OS and CEF version?

[otoshimono]

Latest branch among the builds for CEF3 and windows 7x64 (build is x32)

[magreenblatt]

You can create a borderless window by setting attributes of the CefWindowInfo structure (specifically, specify WS_BORDER for the style).

[otoshimono]

Thank you for the help.

For testing purposes I tried setting window_info.ex_style = {some defined style} (WS_ from definition list) in simple_app.cc before the CreateBrowser call where window info is relayed.
However, the debug breaks at line 291 in libcef_dll_wrapper.cc with no error message.
I was not able to run border-less window mode due to this.

[magreenblatt]

The CefWindowInfo arguments will be passed to CreateWindowEx. See the documentation: https://msdn.microsoft.com/en-us/library/windows/desktop/ms632680(v=vs.85).aspx

Specifically, the WS_BORDER value would be set for |style| not |ex_style|.

[otoshimono]

Thanks again for the help.

I tried putting a standard style even with borders to test if I could customize it
like so window_info.style = WS_BORDER | WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_VISIBLE;
Even with this I get the same exception break as before.
The rest of the source code is untouched and CEF3 was a clean install.

I am setting window style in simple_app.cc before the CefBrowserHost::CreateBrowser() call.

Not sure why it is breaking? No error message.

If I refrain from setting window_info.style, then the program compiles and runs as expected.

[magreenblatt]

window_info.style = WS_BORDER | WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS | WS_VISIBLE;

Do not set WS_CHILD | WS_CLIPCHILDREN | WS_CLIPSIBLINGS for a top-level window.

[otoshimono]

Thank you again. I made progress, but the window won't show.

I have tried setting simply window_info.style = WS_VISIBLE or window_info.style = WS_POPUP, and other combinations.
with only WS_VISIBLE, the window shows, but still with borders, although no buttons or menu.
With other combinations the window is created, but it does not show (however it appears on the taskbar and if I hover the mouse over that icon, I can see its siluette).

What exactly is missing?

I am also setting the window position after the style.


Edit: I resolved the issue.

The combination of WS_POPUP | WS_VISIBLE | WS_SYSMENU did the trick for me.
Now I will have to implement my own method of moving and closing the window.
Thanks for the support, again.

[kavadog]

How is a borderless window requested on OSX/MAC?