From 9cf8ab8bebea16a8d1bd36e933406f8b4ce8522b Mon Sep 17 00:00:00 2001
From: Graham Stewart <25826331+gramnation@users.noreply.github.com>
Date: Sun, 23 Aug 2020 07:50:01 -0500
Subject: [PATCH] Update osgQOpenGLWidget

"When implementing a new widget, it is almost always useful to reimplement sizeHint() to provide a reasonable default size for the widget and to set the correct size policy with setSizePolicy()."
https://doc.qt.io/qt-5/qwidget.html#size-hints-and-size-policies

Default value of QWidget::rect is 0,0,640,480. This SD aspect ratio agrees with OSG when widget is shown by itself. However, once widget is put into a layout it has to return a valid sizeHint in order to preserve this aspect ratio and size.
---
 include/osgQOpenGL/osgQOpenGLWidget | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/include/osgQOpenGL/osgQOpenGLWidget b/include/osgQOpenGL/osgQOpenGLWidget
index a5a7ae5..72aa53e 100644
--- a/include/osgQOpenGL/osgQOpenGLWidget
+++ b/include/osgQOpenGL/osgQOpenGLWidget
@@ -53,7 +53,10 @@ public:
 
     //! get mutex
     virtual OpenThreads::ReadWriteMutex* mutex();
-
+    
+    //! override this to change default size or aspect ratio 
+    QSize sizeHint() const override { return QSize(640,480); }
+    
 signals:
     void initialized();