Generic property support for platform windows

QPlatformNativeInterface can now contain generic window
properties in a QVariantMap, to facilitate communication
with the compositor and clients for certain platforms.
When window properties change, a signal is emitted from the
respective QPlatformNativeInterface instance. The properties
are intended to be read/writable from both client and server.

Change-Id: I7b42f7910d03c0d309add6c7dbb1c9b66ad22a3f
Reviewed-on: http://codereview.qt.nokia.com/3956
Reviewed-by: Samuel Rødal <samuel.rodal@nokia.com>

1 files changed, 41 insertions, 0 deletions

diff --git a/src/gui/kernel/qplatformnativeinterface_qpa.cpp b/src/gui/kernel/qplatformnativeinterface_qpa.cpp
index 32849d9b5a..e3f6689acc 100644
--- a/src/gui/kernel/qplatformnativeinterface_qpa.cpp
+++ b/src/gui/kernel/qplatformnativeinterface_qpa.cpp
@@ -50,4 +50,45 @@ void *QPlatformNativeInterface::nativeResourceForWidget(const QByteArray &resour
     return 0;
 }
 
+/*!
+    Contains generic window properties that the platform may utilize.
+*/
+QVariantMap QPlatformNativeInterface::windowProperties(QPlatformWindow *window) const
+{
+    return QVariantMap();
+}
+
+/*!
+    Returns a window property with \a name.
+
+    If the property does not exist, returns a default-constructed value.
+*/
+QVariant QPlatformNativeInterface::windowProperty(QPlatformWindow *window, const QString &name) const
+{
+    Q_UNUSED(window);
+    Q_UNUSED(name);
+    return QVariant();
+}
+
+/*!
+    Returns a window property with \a name. If the value does not exist, defaultValue is returned.
+*/
+QVariant QPlatformNativeInterface::windowProperty(QPlatformWindow *window, const QString &name, const QVariant &defaultValue) const
+{
+    Q_UNUSED(window);
+    Q_UNUSED(name);
+    Q_UNUSED(defaultValue);
+    return QVariant();
+}
+
+/*!
+    Sets a window property with \a name to \a value.
+*/
+void QPlatformNativeInterface::setWindowProperty(QPlatformWindow *window, const QString &name, const QVariant &value)
+{
+    Q_UNUSED(window);
+    Q_UNUSED(name);
+    Q_UNUSED(value);
+}
+
 QT_END_NAMESPACE