BT: Fix Cocoa bug w/OpenGL widgets in dock widgets would disappear.

The NSOpenGLContext seems to be tied to the window. So if the view
changes from one window to another, the OpenGL context needs to be
cleared. We can do this by hooking into the viewWillChangeWindow and
viewDidChangeWindow events and clear and reset the drawable
respectively. We also found out that QCocoaOpenGLView was not being used
at all, so just remove it to get rid of any confusion.

Task-number: 250066
Reviewed-by: Trond

1 files changed, 4 insertions, 0 deletions

diff --git a/src/opengl/qgl.cpp b/src/opengl/qgl.cpp
index 6d75d02350..b4a0e5c909 100644
--- a/src/opengl/qgl.cpp
+++ b/src/opengl/qgl.cpp
@@ -3234,6 +3234,10 @@ bool QGLWidget::event(QEvent *e)
             update();
         }
         return true;
+#  if defined(QT_MAC_USE_COCOA)
+    } else if (e->type() == QEvent::MacGLClearDrawable) {
+        d->glcx->d_ptr->clearDrawable();
+#  endif
     }
 #endif