diff options
Diffstat (limited to 'src/datavisualization/engine/qabstract3dgraph.cpp')
-rw-r--r-- | src/datavisualization/engine/qabstract3dgraph.cpp | 33 |
1 files changed, 28 insertions, 5 deletions
diff --git a/src/datavisualization/engine/qabstract3dgraph.cpp b/src/datavisualization/engine/qabstract3dgraph.cpp index 2f3caccd..bc40fbf9 100644 --- a/src/datavisualization/engine/qabstract3dgraph.cpp +++ b/src/datavisualization/engine/qabstract3dgraph.cpp @@ -189,7 +189,11 @@ QAbstract3DGraph::QAbstract3DGraph(QAbstract3DGraphPrivate *d, const QSurfaceFor d_ptr->m_context->setFormat(requestedFormat()); d_ptr->m_context->create(); - d_ptr->m_context->makeCurrent(this); + bool makeSuccess = d_ptr->m_context->makeCurrent(this); + + // If we fail to get context, just abort + if (!makeSuccess || !QOpenGLContext::currentContext()) + return; initializeOpenGLFunctions(); @@ -208,6 +212,8 @@ QAbstract3DGraph::QAbstract3DGraph(QAbstract3DGraphPrivate *d, const QSurfaceFor qFatal("GLSL version must be 1.20 or higher. Try installing latest display drivers."); } + d_ptr->m_initialized = true; + d_ptr->renderLater(); #if defined(Q_OS_OSX) @@ -872,6 +878,20 @@ qreal QAbstract3DGraph::margin() const } /*! + * \return \c{true} if the OpenGL context of the graph has been successfully initialized. + * Trying to use a graph when the context initialization has failed typically results in a crash. + * A common reason for a context initialization failure is lack of sufficient platform support + * for OpenGL. + */ +bool QAbstract3DGraph::hasContext() const +{ + if (d_ptr->m_initialized) + return true; + else + return false; +} + +/*! * \internal */ bool QAbstract3DGraph::event(QEvent *event) @@ -898,9 +918,11 @@ void QAbstract3DGraph::resizeEvent(QResizeEvent *event) { Q_UNUSED(event); - Q3DScene *scene = d_ptr->m_visualController->scene(); - scene->d_ptr->setWindowSize(QSize(width(), height())); - scene->d_ptr->setViewport(QRect(0, 0, width(), height())); + if (d_ptr->m_visualController) { + Q3DScene *scene = d_ptr->m_visualController->scene(); + scene->d_ptr->setWindowSize(QSize(width(), height())); + scene->d_ptr->setViewport(QRect(0, 0, width(), height())); + } } /*! @@ -968,7 +990,8 @@ QAbstract3DGraphPrivate::QAbstract3DGraphPrivate(QAbstract3DGraph *q) m_updatePending(false), m_visualController(0), m_devicePixelRatio(1.f), - m_offscreenSurface(0) + m_offscreenSurface(0), + m_initialized(false) { } |