Allow Loader sourceComponent to be set to undefeined.

2 files changed, 11 insertions, 2 deletions

diff --git a/src/declarative/graphicsitems/qdeclarativeloader.cpp b/src/declarative/graphicsitems/qdeclarativeloader.cpp
index 3f257b5..bdd2c87 100644
--- a/src/declarative/graphicsitems/qdeclarativeloader.cpp
+++ b/src/declarative/graphicsitems/qdeclarativeloader.cpp
@@ -132,12 +132,15 @@ void QDeclarativeLoaderPrivate::initResize()
     \endcode
 
     If the Loader source is changed, any previous items instantiated
-    will be destroyed.  Setting \c source to an empty string
+    will be destroyed.  Setting \c source to an empty string, or setting
+    sourceComponent to \e undefined
     will destroy the currently instantiated items, freeing resources
     and leaving the Loader empty.  For example:
 
     \code
     pageLoader.source = ""
+      or
+    pageLoader.sourceComponent = undefined
     \endcode
 
     unloads "Page1.qml" and frees resources consumed by it.
@@ -271,6 +274,11 @@ void QDeclarativeLoader::setSourceComponent(QDeclarativeComponent *comp)
     }
 }
 
+void QDeclarativeLoader::resetSourceComponent()
+{
+    setSourceComponent(0);
+}
+
 void QDeclarativeLoaderPrivate::_q_sourceLoaded()
 {
     Q_Q(QDeclarativeLoader);
diff --git a/src/declarative/graphicsitems/qdeclarativeloader_p.h b/src/declarative/graphicsitems/qdeclarativeloader_p.h
index 65538a8..e9fd8e9 100644
--- a/src/declarative/graphicsitems/qdeclarativeloader_p.h
+++ b/src/declarative/graphicsitems/qdeclarativeloader_p.h
@@ -58,7 +58,7 @@ class Q_DECLARATIVE_EXPORT QDeclarativeLoader : public QDeclarativeItem
     Q_ENUMS(ResizeMode)
 
     Q_PROPERTY(QUrl source READ source WRITE setSource NOTIFY sourceChanged)
-    Q_PROPERTY(QDeclarativeComponent *sourceComponent READ sourceComponent WRITE setSourceComponent NOTIFY sourceChanged)
+    Q_PROPERTY(QDeclarativeComponent *sourceComponent READ sourceComponent WRITE setSourceComponent RESET resetSourceComponent NOTIFY sourceChanged)
     Q_PROPERTY(ResizeMode resizeMode READ resizeMode WRITE setResizeMode NOTIFY resizeModeChanged)
     Q_PROPERTY(QGraphicsObject *item READ item NOTIFY itemChanged)
     Q_PROPERTY(Status status READ status NOTIFY statusChanged)
@@ -73,6 +73,7 @@ public:
 
     QDeclarativeComponent *sourceComponent() const;
     void setSourceComponent(QDeclarativeComponent *);
+    void resetSourceComponent();
 
     enum Status { Null, Ready, Loading, Error };
     Status status() const;