On Mon, Nov 26, 2012 at 11:30 PM, Michael Goffioul < michael.goffi...@gmail.com> wrote:
> Hi, > > I'm trying to use a Qt-build of mozilla as an embedded web browser. I've > built mozilla for Qt from git sources and used a patched version of > mozembed as explained in [1]. I've already detected and fixed 2 issues in > mozilla sources, but now I've a problem with scrollbar rendering. > > Scrollbars are not rendered at top-level. They're rendered correctly in > sub frames. See the following screenshots for an illustration: > - mozembed1 [2]: page with frames, where scrollbars are rendered > - mozembed2 [3]: page without frames, scrollbars are not rendered > These screenshots are produced using my test embedding app, but I can > reproduce the exact same result by running firefox from my Qt-build of > mozilla. The weird colors in the first screenshot are due to modification > I've made to nsNativeTheme.cpp to easily identify what was rendered where. > Obviously the missing colors in the second screenshot is a hint that > scrollbars are not rendered properly. > > Would anybody have some hint where I should look at to track down the > issue? I don't mind digging into the code, but given the size of the code > base, any hint will be greatly appreciated. > > From my first debugging attempts, I can tell that rendering code is > executed and scrollbars are painted into some gfxImageSurface (width = 64, > height = window height; not sure why the width is 64 as the scrollbar > should only be ~17 pixels wide). However when this is transfered later on > to Qt, through nsWindow::DoPaint, it's using another gfxImageSurface > object, namely gBufferSurface defined in widget/qt/nsWindow.cpp. > > Thanks, > Michael. > > [1] > https://groups.google.com/group/mozilla.dev.embedding/browse_thread/thread/0db32900d2ff53ca# > [2] http://picpaste.com/mozembed1-cwDoOT2O.png > [3] http://picpaste.com/mozembed2-KFTOssgU.png > > Also, if there's a more appropriate mailing list for this kind of questions, please let me know. Michael. _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
