Send ParentChanged event to QGLWidgets when the wId changes on EGL

EGL has window surfaces which are bound to a particular window ID. When
that window ID changes, the EGL surface must be re-created. This is
achieved by sending the QGLWidget a ParentChanged event.

Reviewed-By: Trond

1 files changed, 5 insertions, 4 deletions

diff --git a/src/gui/kernel/qwidget.cpp b/src/gui/kernel/qwidget.cpp
index d6e5cce..5538c11 100644
--- a/src/gui/kernel/qwidget.cpp
+++ b/src/gui/kernel/qwidget.cpp
@@ -9203,11 +9203,12 @@ void QWidget::setParent(QWidget *parent, Qt::WindowFlags f)
     d->resolveLayoutDirection();
     d->resolveLocale();
 
-    // Note: GL widgets under Windows will always need a ParentChange
-    // event to handle recreation/rebinding of the GL context, hence
-    // the (f & Qt::MSWindowsOwnDC) clause
+    // Note: GL widgets under WGL or EGL will always need a ParentChange
+    // event to handle recreation/rebinding of the GL context, hence the
+    // (f & Qt::MSWindowsOwnDC) clause (which is set on QGLWidgets on all
+    // platforms).
     if (newParent
-#ifdef Q_WS_WIN
+#if defined(Q_WS_WIN) || defined(QT_OPENGL_ES)
         || (f & Qt::MSWindowsOwnDC)
 #endif
         ) {