1 files changed, 44 insertions, 0 deletions
diff --git a/src/plugins/platforms/offscreen/qoffscreenintegration.cpp b/src/plugins/platforms/offscreen/qoffscreenintegration.cpp
index 0c39950019..75bb786b28 100644
--- a/src/plugins/platforms/offscreen/qoffscreenintegration.cpp
+++ b/src/plugins/platforms/offscreen/qoffscreenintegration.cpp
@@ -59,6 +59,9 @@
 
 #include <QtGui/private/qpixmap_raster_p.h>
 #include <QtGui/private/qguiapplication_p.h>
+#include <qpa/qplatforminputcontextfactory_p.h>
+#include <qpa/qplatforminputcontext.h>
+#include <qpa/qplatformtheme.h>
 
 #include <qpa/qplatformservices.h>
 
@@ -118,6 +121,16 @@ QOffscreenIntegration::~QOffscreenIntegration()
 {
 }
 
+void QOffscreenIntegration::initialize()
+{
+    m_inputContext.reset(QPlatformInputContextFactory::create());
+}
+
+QPlatformInputContext *QOffscreenIntegration::inputContext() const
+{
+    return m_inputContext.data();
+}
+
 bool QOffscreenIntegration::hasCapability(QPlatformIntegration::Capability cap) const
 {
     switch (cap) {
@@ -155,6 +168,37 @@ QAbstractEventDispatcher *QOffscreenIntegration::createEventDispatcher() const
 #endif
 }
 
+static QString themeName() { return QStringLiteral("offscreen"); }
+
+QStringList QOffscreenIntegration::themeNames() const
+{
+    return QStringList(themeName());
+}
+
+// Restrict the styles to "fusion" to prevent native styles requiring native
+// window handles (eg Windows Vista style) from being used.
+class OffscreenTheme : public QPlatformTheme
+{
+public:
+    OffscreenTheme() {}
+
+    QVariant themeHint(ThemeHint h) const override
+    {
+        switch (h) {
+        case StyleNames:
+            return QVariant(QStringList(QStringLiteral("fusion")));
+        default:
+            break;
+        }
+        return QPlatformTheme::themeHint(h);
+    }
+};
+
+QPlatformTheme *QOffscreenIntegration::createPlatformTheme(const QString &name) const
+{
+    return name == themeName() ? new OffscreenTheme() : nullptr;
+}
+
 QPlatformFontDatabase *QOffscreenIntegration::fontDatabase() const
 {
     return m_fontDatabase.data();