On Jan 31, 2011, at 3:41 PM, Nick Guenther wrote:
> I'm using WebKit2 and trying to capture when it's drawn. The trouble is I
> want to do this to an offscreen window. I'm sending WM_PRINTCLIENT but after
> some digging I found that while the WM_PAINT handler emits a didDraw(), the
> WM_PRINTCLIENT one does not:
>
> Source\WebKit2\UIProcess\win:
>
> LRESULT WebView::onPaintEvent(HWND hWnd, UINT message, WPARAM, LPARAM, bool&
> handled)
> {
> PAINTSTRUCT paintStruct;
> HDC hdc = ::BeginPaint(m_window, &paintStruct);
>
> if (m_page->isValid() && m_page->drawingArea() &&
> m_page->drawingArea()->paint(IntRect(paintStruct.rcPaint), hdc))
> m_page->didDraw();
> else {
> // Mac checks WebPageProxy::drawsBackground and
> // WebPageProxy::drawsTransparentBackground here, but those are always
> false on Windows
> // currently (see <http://webkit.org/b/52009>).
> ::FillRect(hdc, &paintStruct.rcPaint,
> reinterpret_cast<HBRUSH>(COLOR_WINDOW + 1));
> }
>
> ::EndPaint(m_window, &paintStruct);
>
> handled = true;
> return 0;
> }
>
> LRESULT WebView::onPrintClientEvent(HWND hWnd, UINT, WPARAM wParam, LPARAM,
> bool& handled)
> {
> HDC hdc = reinterpret_cast<HDC>(wParam);
> RECT winRect;
> ::GetClientRect(hWnd, &winRect);
> IntRect rect = winRect;
>
> m_page->drawingArea()->paint(rect, hdc);
>
> handled = true;
> return 0;
> }
>
> Would it be reasonable to add didDraw() to onPrintClientEvent()?
Yes. I actually just fixed this in r78200.
> Actually I noticed a whole bunch of callbacks actually aren't called, in
> WebPageProxy.h are declared private, even, like setWindowFrame. What's the
> plan for all these, is anyone working on them?
setWindowFrame is called when a Messages::WebPageProxy::SetWebFrame message is
received from the web process. The web process sends this message when
WebChromeClient::setWindowRect is called.
-Adam
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