>
> Can you try to set/unset documentMode in DragTabBar::DragTabBar and see what
> it does?
>
> JMarc
I’ve inserted setDocumentMode(true/false); and it doesn’t make any difference.
I’ve then set breakpoints in :
QCocoaNativeInterface::setContentBorderEnabled(QWindow *window, bool enable)
and QMainWindow::setUnifiedTitleAndToolBarOnMac(bool set)
but these are never triggered ...
… because the format() you’ve been following is not from QCocoaBackingStore,
but from QRasterBackingStore, as shown in this stack ...
… and that’s because the code for the QCocoaBackingStore::format() has changed
between Qt-5.9 and Qt-5.10;
This is the code for Qt-5.10:
QImage::Format QCocoaBackingStore::format() const
{
if (windowHasUnifiedToolbar())
return QImage::Format_ARGB32_Premultiplied;
return QRasterBackingStore::format();
}
=======
The top routine in the stack QSurfaceFormat::hasAlpha() returns:
return d->alphaBufferSize > 0; (with alphaBufferSize=8)
The latter is set in :
QSurfaceFormat QCocoaWindow::format() const
{
QSurfaceFormat format = window()->requestedFormat();
// Upgrade the default surface format to include an alpha channel. The
default RGB format
// causes Cocoa to spend an unreasonable amount of time converting it to
RGBA internally.
if (format == QSurfaceFormat())
format.setAlphaBufferSize(8);
return format;
}
=======
