Added setSwitchPolicy to MeeGo graphicssystem helper API.

This lets the application control whether or not automatic switching
should be used, and also to completely disable switching if desired.

Reviewed-by: Armin Berres

2 files changed, 19 insertions, 6 deletions

diff --git a/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp b/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp
index cb66695..c904c3c 100644
--- a/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp
+++ b/src/plugins/graphicssystems/meego/qmeegographicssystem.cpp
@@ -67,6 +67,8 @@ QHash <Qt::HANDLE, QPixmap*> QMeeGoGraphicsSystem::liveTexturePixmaps;
 
 QList<QMeeGoSwitchCallback> QMeeGoGraphicsSystem::switchCallbacks;
 
+QMeeGoGraphicsSystem::SwitchPolicy QMeeGoGraphicsSystem::switchPolicy = QMeeGoGraphicsSystem::AutomaticSwitch;
+
 QMeeGoGraphicsSystem::QMeeGoGraphicsSystem()
 {
     qDebug("Using the meego graphics system");
@@ -122,14 +124,14 @@ void QMeeGoGraphicsSystemSwitchHandler::addWidget(QWidget *widget)
 
 void QMeeGoGraphicsSystemSwitchHandler::handleMapNotify()
 {
-    if (m_widgets.isEmpty())
+    if (m_widgets.isEmpty() && QMeeGoGraphicsSystem::switchPolicy == QMeeGoGraphicsSystem::AutomaticSwitch)
         QTimer::singleShot(0, this, SLOT(switchToMeeGo()));
 }
 
 void QMeeGoGraphicsSystemSwitchHandler::removeWidget(QObject *object)
 {
     m_widgets.removeOne(static_cast<QWidget *>(object));
-    if (m_widgets.isEmpty())
+    if (m_widgets.isEmpty() && QMeeGoGraphicsSystem::switchPolicy == QMeeGoGraphicsSystem::AutomaticSwitch)
         QTimer::singleShot(0, this, SLOT(switchToRaster()));
 }
 
@@ -153,7 +155,9 @@ int QMeeGoGraphicsSystemSwitchHandler::visibleWidgets() const
 
 bool QMeeGoGraphicsSystemSwitchHandler::eventFilter(QObject *object, QEvent *event)
 {
-    if (event->type() == QEvent::WindowStateChange) {
+    if (event->type() == QEvent::WindowStateChange
+        && QMeeGoGraphicsSystem::switchPolicy == QMeeGoGraphicsSystem::AutomaticSwitch)
+    {
         QWindowStateChangeEvent *change = static_cast<QWindowStateChangeEvent *>(event);
         QWidget *widget = static_cast<QWidget *>(object);
 
@@ -380,7 +384,7 @@ QString QMeeGoGraphicsSystem::runningGraphicsSystemName()
 
 void QMeeGoGraphicsSystem::switchToMeeGo()
 {
-    if (meeGoRunning())
+    if (switchPolicy == NoSwitch || meeGoRunning())
         return;
 
     if (QApplicationPrivate::instance()->graphics_system_name != QLatin1String("runtime"))
@@ -397,7 +401,7 @@ void QMeeGoGraphicsSystem::switchToMeeGo()
 
 void QMeeGoGraphicsSystem::switchToRaster()
 {
-    if (runningGraphicsSystemName() == QLatin1String("raster"))
+    if (switchPolicy == NoSwitch || runningGraphicsSystemName() == QLatin1String("raster"))
         return;
 
     if (QApplicationPrivate::instance()->graphics_system_name != QLatin1String("runtime"))
@@ -522,4 +526,9 @@ void qt_meego_register_switch_callback(QMeeGoSwitchCallback callback)
     QMeeGoGraphicsSystem::registerSwitchCallback(callback);
 }
 
+void qt_meego_set_switch_policy(int policy)
+{
+    QMeeGoGraphicsSystem::switchPolicy = QMeeGoGraphicsSystem::SwitchPolicy(policy);
+}
+
 #include "qmeegographicssystem.moc"
diff --git a/src/plugins/graphicssystems/meego/qmeegographicssystem.h b/src/plugins/graphicssystems/meego/qmeegographicssystem.h
index ecc85b2..3528425 100644
--- a/src/plugins/graphicssystems/meego/qmeegographicssystem.h
+++ b/src/plugins/graphicssystems/meego/qmeegographicssystem.h
@@ -52,6 +52,8 @@ extern "C" typedef void (*QMeeGoSwitchCallback)(int type, const char *name);
 class QMeeGoGraphicsSystem : public QGraphicsSystem
 {
 public:
+    enum SwitchPolicy { AutomaticSwitch, ManualSwitch, NoSwitch };
+
     QMeeGoGraphicsSystem();
     ~QMeeGoGraphicsSystem();
 
@@ -84,6 +86,8 @@ public:
 
     static void registerSwitchCallback(QMeeGoSwitchCallback callback);
 
+    static SwitchPolicy switchPolicy;
+
 private:
     static bool meeGoRunning();
     static EGLSurface getSurfaceForLiveTexturePixmap(QPixmap *pixmap);
@@ -93,7 +97,6 @@ private:
     static bool surfaceWasCreated;
     static QHash<Qt::HANDLE, QPixmap*> liveTexturePixmaps;
     static QList<QMeeGoSwitchCallback> switchCallbacks;
-
 };
 
 /* C api */
@@ -118,6 +121,7 @@ extern "C" {
     Q_DECL_EXPORT void qt_meego_switch_to_raster(void);
     Q_DECL_EXPORT void qt_meego_switch_to_meego(void);
     Q_DECL_EXPORT void qt_meego_register_switch_callback(QMeeGoSwitchCallback callback);
+    Q_DECL_EXPORT void qt_meego_set_switch_policy(int policy);
 }
 
 #endif