CEF Forum

hi,
When I customize the CEFClient's browser_background_color_ to CefColorSetARGB(255, 0, 0, 255), it causes a flash white after the rootWindow is created.

IN "CefBrowserViewImpl.h" it only change the resizeBackgroundColor, and in "view_view.h" the backgroundColr is set to be white and not changed after.

I wonder if there already had a way to change the browser's backgroundColor without flashing white, or could privide one, thanks for your kind help.

1. cef/libcef/browser/views/browser_view_impl.cc

void CefBrowserViewImpl::SetBackgroundColor(cef_color_t color) {
CEF_REQUIRE_VALID_RETURN_VOID();
ParentClass::SetBackgroundColor(color);
if (root_view())
root_view()->SetResizeBackgroundColor(color);
}

2. libcef "view_view.h"

virtual void Initialize() {
// Use our defaults instead of the Views framework defaults.
ParentClass::set_background(views::Background::CreateSolidBackground(
view_util::kDefaultBackgroundColor));
}

3.chromium / experimental / chromium / src / refs/wip/bajones/webvr / . / ui / views / controls / native / native_view_host.cc
void NativeViewHost::OnPaint(gfx::Canvas* canvas) {
// Paint background if there is one. NativeViewHost needs to paint
// a background when it is hosted in a TabbedPane. For Gtk implementation,
// NativeTabbedPaneGtk uses a NativeWidgetGtk as page container and because
// NativeWidgetGtk hook "expose" with its root view's paint, we need to
// fill the content. Otherwise, the tab page's background is not properly
// cleared. For Windows case, it appears okay to not paint background because
// we don't have a container window in-between. However if you want to use
// customized background, then this becomes necessary.
OnPaintBackground(canvas);
// The area behind our window is black, so during a fast resize (where our
// content doesn't draw over the full size of our native view, and the native
// view background color doesn't show up), we need to cover that blackness
// with something so that fast resizes don't result in black flash.
//
// It would be nice if this used some approximation of the page's
// current background color.
if (native_wrapper_->HasInstalledClip())
canvas->FillRect(GetLocalBounds(), resize_background_color_);
}


thx

What OS and CEF version are you using?

hi,

OS: win7
CEF version: cef_binary_3.3071.1649.g98725e6_windows32

it did not work when i customize browser_background_color to CefColorSetARGB(255, 19, 34, 34)[In "qbbrowser/browser/main_context_impl.h"].

I also set the "settings.background_color = CefColorSetARGB(255, 19, 34, 34);" after "MainContext::Get()->PopulateBrowserSettings(&settings);".

But browser_window_'s background-color is still white when loading url. If document's background-color is set to be transparent(like about:blank page), the browser shows a white page.

I wonder how to custom browser_background_color in a right way for windows.


thx

I has the same problem, it will show a flash white background when loading even if I set CefSettings.background_color

I'd also like to solve this - we are trying to make the web component as seamless as possible with the rest of the UI and that white flash doesn't help at all.

I saw a solution for a much older version of CEF that had a setting to change the default style sheet. Not available now but perhaps there is a different way to do that now.

I'll investigate.

Are you seeing the white flash with 3202 on Windows?

No!

It's quite an arduous sequence of steps to go from the code in my test framework to the place it's used in our product so I wanted to sort the crash on exit I mentioned in another thread before I did that.

However, after seeing your question, I hacked it in by hand and no more white flash. Makes such a big difference to the feel of the UI.

Thank you.