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-rw-r--r--src/declarative/graphicsitems/qdeclarativeloader.cpp50
1 files changed, 36 insertions, 14 deletions
diff --git a/src/declarative/graphicsitems/qdeclarativeloader.cpp b/src/declarative/graphicsitems/qdeclarativeloader.cpp
index 4995baf..898c5a5 100644
--- a/src/declarative/graphicsitems/qdeclarativeloader.cpp
+++ b/src/declarative/graphicsitems/qdeclarativeloader.cpp
@@ -115,27 +115,37 @@ void QDeclarativeLoaderPrivate::initResize()
subtree from a QML URL or Component.
Loader instantiates an item from a component. The component to
- instantiate may be specified directly by the \c sourceComponent
- property, or loaded from a URL via the \c source property.
+ instantiate may be specified directly by the \l sourceComponent
+ property, or loaded from a URL via the \l source property.
It is also an effective means of delaying the creation of a component
until it is required:
\code
+ import Qt 4.7
+
Loader { id: pageLoader }
+
Rectangle {
- MouseArea { anchors.fill: parent; onClicked: pageLoader.source = "Page1.qml" }
+ MouseArea {
+ anchors.fill: parent
+ onClicked: pageLoader.source = "Page1.qml"
+ }
}
\endcode
If the Loader source is changed, any previous items instantiated
- will be destroyed. Setting \c source to an empty string, or setting
+ will be destroyed. Setting \l 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 = ""
+ \endcode
+
or
+
+ \code
pageLoader.sourceComponent = undefined
\endcode
@@ -340,19 +350,31 @@ void QDeclarativeLoaderPrivate::_q_sourceLoaded()
\o Loader.Error - an error occurred while loading the QML source
\endlist
- Note that a change in the status property does not cause anything to happen
- (although it reflects what has happened to the loader internally). If you wish
- to react to the change in status you need to do it yourself, for example in one
- of the following ways:
- \list
- \o Create a state, so that a state change occurs, e.g. State{name: 'loaded'; when: loader.status = Loader.Ready;}
- \o Do something inside the onLoaded signal handler, e.g. Loader{id: loader; onLoaded: console.log('Loaded');}
- \o Bind to the status variable somewhere, e.g. Text{text: if(loader.status!=Loader.Ready){'Not Loaded';}else{'Loaded';}}
- \endlist
- \sa progress
+ Use this status to provide an update or respond to the status change in some way.
+ For example, you could:
+
+ \e {Trigger a state change:}
+ \qml
+ State { name: 'loaded'; when: loader.status = Loader.Ready }
+ \endqml
+
+ \e {Implement an \c onStatusChanged signal handler:}
+ \qml
+ Loader {
+ id: loader
+ onStatusChanged: if (loader.status == Loader.Ready) console.log('Loaded')
+ }
+ \endqml
+
+ \e {Bind to the status value:}
+ \qml
+ Text { text: loader.status != Loader.Ready ? 'Not Loaded' : 'Loaded' }
+ \endqml
Note that if the source is a local file, the status will initially be Ready (or Error). While
there will be no onStatusChanged signal in that case, the onLoaded will still be invoked.
+
+ \sa progress
*/
QDeclarativeLoader::Status QDeclarativeLoader::status() const