From 511132ee4fe77f6535460c96bf70be47b1b65d7d Mon Sep 17 00:00:00 2001
From: Uwe Kindler <uwe_kindler@web.de>
Date: Thu, 17 Jun 2021 20:32:45 +0200
Subject: [PATCH] Fixxed issue #294 - Tab refresh problem with a QGLWidget

---
 src/DockAreaWidget.cpp | 15 +++++++++++++++
 src/DockAreaWidget.h   | 11 +++++++++++
 2 files changed, 26 insertions(+)

diff --git a/src/DockAreaWidget.cpp b/src/DockAreaWidget.cpp
index 01914aaa5..09fd8fd22 100644
--- a/src/DockAreaWidget.cpp
+++ b/src/DockAreaWidget.cpp
@@ -1030,6 +1030,21 @@ void CDockAreaWidget::onDockWidgetFeaturesChanged()
 }
 
 
+#ifdef Q_OS_WIN
+//============================================================================
+bool CDockAreaWidget::event(QEvent *e)
+{
+    switch (e->type())
+    {
+    case QEvent::PlatformSurface: return true;
+    default:
+        break;
+    }
+
+    return Super::event(e);
+}
+#endif
+
 } // namespace ads
 
 //---------------------------------------------------------------------------
diff --git a/src/DockAreaWidget.h b/src/DockAreaWidget.h
index a702370bd..536192672 100644
--- a/src/DockAreaWidget.h
+++ b/src/DockAreaWidget.h
@@ -77,6 +77,17 @@ private Q_SLOTS:
 	void reorderDockWidget(int fromIndex, int toIndex);
 
 protected:
+
+#ifdef Q_OS_WIN
+	/**
+	 * Reimplements QWidget::event to handle QEvent::PlatformSurface
+	 * This is here to fix issue #294 Tab refresh problem with a QGLWidget
+	 * that exists since Qt version 5.12.7. So this function is here to
+	 * work around a Qt issue.
+	 */
+	virtual bool event(QEvent *event) override;
+#endif
+
 	/**
 	 * Inserts a dock widget into dock area.
 	 * All dockwidgets in the dock area tabified in a stacked layout with tabs.