Emit signals for compositor properties

Allow property binding from QML and add a created property that is
set to true after the initialization.

Change-Id: I923eedc793660b4ea18372eb0182eae0bcca436d
Reviewed-by: Johan Helsing <johan.helsing@qt.io>

2 files changed, 31 insertions, 3 deletions

diff --git a/src/compositor/compositor_api/qwaylandcompositor.cpp b/src/compositor/compositor_api/qwaylandcompositor.cpp
index 391b39416..732e607bc 100644
--- a/src/compositor/compositor_api/qwaylandcompositor.cpp
+++ b/src/compositor/compositor_api/qwaylandcompositor.cpp
@@ -210,6 +210,8 @@ void QWaylandCompositorPrivate::init()
             QCoreApplication::sendEvent(object.data(), &polishEvent);
         }
     }
+
+    emit q->createdChanged();
 }
 
 QWaylandCompositorPrivate::~QWaylandCompositorPrivate()
@@ -471,7 +473,17 @@ void QWaylandCompositor::create()
 }
 
 /*!
- * Returns true if the QWaylandCompositor has been initialized. Otherwise returns false.
+ * \qmlproperty bool QtWaylandCompositor::WaylandCompositor::created
+ *
+ * This property is true if WaylandCompositor has been initialized,
+ * otherwise it's false.
+ */
+
+/*!
+ * \property QWaylandCompositor::created
+ *
+ * This property is true if QWaylandCompositor has been initialized,
+ * otherwise it's false.
  */
 bool QWaylandCompositor::isCreated() const
 {
@@ -503,11 +515,17 @@ bool QWaylandCompositor::isCreated() const
 void QWaylandCompositor::setSocketName(const QByteArray &name)
 {
     Q_D(QWaylandCompositor);
+
+    if (d->socket_name == name)
+        return;
+
     if (d->initialized) {
         qWarning("%s: Changing socket name after initializing the compositor is not supported.\n", Q_FUNC_INFO);
         return;
     }
+
     d->socket_name = name;
+    emit socketNameChanged(name);
 }
 
 QByteArray QWaylandCompositor::socketName() const
@@ -728,7 +746,12 @@ QWaylandTouch *QWaylandCompositor::createTouchDevice(QWaylandSeat *seat)
 void QWaylandCompositor::setRetainedSelectionEnabled(bool enabled)
 {
     Q_D(QWaylandCompositor);
+
+    if (d->retainSelection == enabled)
+        return;
+
     d->retainSelection = enabled;
+    emit retainedSelectionChanged(enabled);
 }
 
 bool QWaylandCompositor::retainedSelectionEnabled() const
diff --git a/src/compositor/compositor_api/qwaylandcompositor.h b/src/compositor/compositor_api/qwaylandcompositor.h
index 15022b378..8b190d1d2 100644
--- a/src/compositor/compositor_api/qwaylandcompositor.h
+++ b/src/compositor/compositor_api/qwaylandcompositor.h
@@ -73,8 +73,9 @@ class Q_WAYLAND_COMPOSITOR_EXPORT QWaylandCompositor : public QWaylandObject
 {
     Q_OBJECT
     Q_DECLARE_PRIVATE(QWaylandCompositor)
-    Q_PROPERTY(QByteArray socketName READ socketName WRITE setSocketName)
-    Q_PROPERTY(bool retainedSelection READ retainedSelectionEnabled WRITE setRetainedSelectionEnabled)
+    Q_PROPERTY(QByteArray socketName READ socketName WRITE setSocketName NOTIFY socketNameChanged)
+    Q_PROPERTY(bool created READ isCreated NOTIFY createdChanged)
+    Q_PROPERTY(bool retainedSelection READ retainedSelectionEnabled WRITE setRetainedSelectionEnabled NOTIFY retainedSelectionChanged)
     Q_PROPERTY(QWaylandOutput *defaultOutput READ defaultOutput WRITE setDefaultOutput NOTIFY defaultOutputChanged)
     Q_PROPERTY(bool useHardwareIntegrationExtension READ useHardwareIntegrationExtension WRITE setUseHardwareIntegrationExtension NOTIFY useHardwareIntegrationExtensionChanged)
     Q_PROPERTY(QWaylandSeat *defaultSeat READ defaultSeat NOTIFY defaultSeatChanged)
@@ -126,6 +127,10 @@ public Q_SLOTS:
     void processWaylandEvents();
 
 Q_SIGNALS:
+    void createdChanged();
+    void socketNameChanged(const QByteArray &socketName);
+    void retainedSelectionChanged(bool retainedSelection);
+
     void surfaceRequested(QWaylandClient *client, uint id, int version);
     void surfaceCreated(QWaylandSurface *surface);
     void surfaceAboutToBeDestroyed(QWaylandSurface *surface);