1 files changed, 15 insertions, 11 deletions
diff --git a/examples/datavisualization/graphgallery/main.cpp b/examples/datavisualization/graphgallery/main.cpp
index efe8ecbd..3e581983 100644
--- a/examples/datavisualization/graphgallery/main.cpp
+++ b/examples/datavisualization/graphgallery/main.cpp
@@ -6,8 +6,10 @@
 #include "surfacegraph.h"
 
 #include <QtWidgets/qapplication.h>
+#include <QtWidgets/qmessagebox.h>
 #include <QtWidgets/qwidget.h>
 #include <QtWidgets/qtabwidget.h>
+#include <QtGui/qscreen.h>
 
 using namespace Qt::StringLiterals;
 
@@ -17,24 +19,26 @@ int main(int argc, char **argv)
 
     QApplication app(argc, argv);
 
+    // Create a tab widget for creating own tabs for Q3DBars, Q3DScatter, and Q3DSurface
+    QTabWidget tabWidget;
+    tabWidget.setWindowTitle(u"Graph Gallery"_s);
+
+    const QSize screenSize = tabWidget.screen()->size();
+    const QSize minimumGraphSize{screenSize.width() / 2, qRound(screenSize.height() / 1.75)};
+
     // Create bar graph
     BarGraph bars;
-    if (!bars.initialize())
-        return -1;
-
     // Create scatter graph
     ScatterGraph scatter;
-    if (!scatter.initialize())
-        return -1;
-
     // Create surface graph
     SurfaceGraph surface;
-    if (!surface.initialize())
-        return -1;
 
-    // Create a tab widget for creating own tabs for Q3DBars, Q3DScatter, and Q3DSurface
-    QTabWidget tabWidget;
-    tabWidget.setWindowTitle(u"Graph Gallery"_s);
+    if (!bars.initialize(minimumGraphSize, screenSize)
+        || !scatter.initialize(minimumGraphSize, screenSize)
+        || !surface.initialize(minimumGraphSize, screenSize)) {
+        QMessageBox::warning(nullptr, u"Graph Gallery"_s, u"Couldn't initialize the OpenGL context."_s);
+        return -1;
+    }
 
     // Add bars widget
     tabWidget.addTab(bars.barsWidget(), u"Bar Graph"_s);