Document BorderImage::asynchronous

It's been there forever, but someone forgot the documentation.

Task-number: QTBUG-16612

1 files changed, 14 insertions, 0 deletions

diff --git a/src/declarative/graphicsitems/qdeclarativeborderimage.cpp b/src/declarative/graphicsitems/qdeclarativeborderimage.cpp
index c03c624..91896f2 100644
--- a/src/declarative/graphicsitems/qdeclarativeborderimage.cpp
+++ b/src/declarative/graphicsitems/qdeclarativeborderimage.cpp
@@ -149,6 +149,20 @@ QT_BEGIN_NAMESPACE
     \sa Image, AnimatedImage
  */
 
+/*!
+    \qmlproperty bool BorderImage::asynchronous
+
+    Specifies that images on the local filesystem should be loaded
+    asynchronously in a separate thread.  The default value is
+    false, causing the user interface thread to block while the
+    image is loaded.  Setting \a asynchronous to true is useful where
+    maintaining a responsive user interface is more desirable
+    than having images immediately visible.
+
+    Note that this property is only valid for images read from the
+    local filesystem.  Images loaded via a network resource (e.g. HTTP)
+    are always loaded asynchonously.
+*/
 QDeclarativeBorderImage::QDeclarativeBorderImage(QDeclarativeItem *parent)
   : QDeclarativeImageBase(*(new QDeclarativeBorderImagePrivate), parent)
 {