Can anyone tell me about QWindow::setTransientParent()? When building with Qt 5 I keep seeing warnings:
void QWindow::setTransientParent(QWindow *) QWidgetWindow(0x118c39a10, name = "QWidgetClassWindow") must be a top level window. One situation where I see it is on Macintosh: Our application can make a 3D graph window that uses OpenGL calls to draw. The OpenGL context is implemented via a QGLWidget. The QGLWidget is contained in a QWidget that is itself contained in a QWidget that is (usually) a top-level window. I see the warning when calling new QMenu(QGLWidget *). Here's a (truncated) stack trace (GizmoWD is our class, of course): 0 QWindow::setTransientParent(QWindow*) qwindow.cpp 1131 0x10969ac1a 1 QWidgetPrivate::setParent_sys(QWidget*, QFlags<Qt::WindowType>) qwidget.cpp 10516 0x10898b528 2 QWidget::setParent(QWidget*, QFlags<Qt::WindowType>) qwidget.cpp 10375 0x108971b07 3 QWidgetPrivate::init(QWidget*, QFlags<Qt::WindowType>) qwidget.cpp 1179 0x10896fe3c 4 QWidget qwidget.cpp 1026 0x1089701a9 5 QMenu qmenu.cpp 1333 0x108b3468f 6 QMenu qmenu.cpp 1336 0x108b3460d 7 GizmoWD::init(char const*, int) GizmoWD.cpp 90 0x100cb58f9 8 doNewGizmo(GizmoWD**, char const*, char*, wDataClass*, wdChildInfo::hostRectType, WMRect*, int, int, int) GizmoBuiltInOps.cpp 279 0x100c81f7a In tracing into this, I see that QGLWidget requires a WinID. The QWindow * being passed to setTransientParent() is the QGLWidget. The QWindow whose setTransientParent() method was called is the QMenu. I haven't seen any obvious problems that I can trace to this, but maybe I'm missing something. I also see it on Windows in some other situations. My apologies for a somewhat vague and abstruse question. I'm trying to understand the warning, but I don't have an obvious place to start. Thanks for any light you can shed! -John _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
