Add Component::onCompleted attached property

5 files changed, 92 insertions, 3 deletions

diff --git a/src/declarative/qml/qmlcomponent.cpp b/src/declarative/qml/qmlcomponent.cpp
index 9a761b2..dc71989 100644
--- a/src/declarative/qml/qmlcomponent.cpp
+++ b/src/declarative/qml/qmlcomponent.cpp
@@ -95,6 +95,27 @@ Item {
     Loader { sourceComponent: RedSquare; x: 20 }
 }
     \endqml
+
+    \section1 Attached Properties
+
+    \e onCompleted
+
+    Emitted after component "startup" has completed.  This can be used to
+    execute script code at startup, once the full QML environment has been 
+    established.
+
+    The \c {Component::onCompleted} attached property can be applied to
+    any element.  The order of running the \c onCompleted scripts is
+    undefined.
+
+    \qml
+    Rectangle {
+        Component.onCompleted: print("Completed Running!")
+        Rectangle {
+            Component.onCompleted: print("Nested Completed Running!")
+        }
+    }
+    \endqml
 */
 QML_DEFINE_TYPE(Qt,4,6,(QT_VERSION&0x00ff00)>>8,Component,QmlComponent);
 
@@ -532,6 +553,11 @@ QmlComponentPrivate::beginCreate(QmlContext *context, const QBitField &bindings)
 
         bindValues = ep->bindValues;
         parserStatus = ep->parserStatus;
+        componentAttacheds = ep->componentAttacheds;
+        if (componentAttacheds)
+            componentAttacheds->prev = &componentAttacheds;
+
+        ep->componentAttacheds = 0;
         ep->bindValues.clear();
         ep->parserStatus.clear();
         completePending = true;
@@ -593,10 +619,49 @@ void QmlComponentPrivate::completeCreate()
             QmlEnginePrivate::clear(ps);
         }
 
+        while (componentAttacheds) {
+            QmlComponentAttached *a = componentAttacheds;
+            if (a->next) a->next->prev = &componentAttacheds;
+            componentAttacheds = a->next;
+            a->prev = 0; a->next = 0;
+            emit a->completed();
+        }
+
         bindValues.clear();
         parserStatus.clear();
         completePending = false;
     }
 }
 
+QmlComponentAttached::QmlComponentAttached(QObject *parent)
+: QObject(parent), prev(0), next(0)
+{
+}
+
+QmlComponentAttached::~QmlComponentAttached()
+{
+    if (prev) *prev = next;
+    if (next) next->prev = prev;
+    prev = 0;
+    next = 0;
+}
+
+QmlComponentAttached *QmlComponent::qmlAttachedProperties(QObject *obj)
+{
+    QmlComponentAttached *a = new QmlComponentAttached(obj);
+
+    QmlEngine *engine = qmlEngine(obj);
+    if (!engine || !QmlEnginePrivate::get(engine)->rootComponent)
+        return a;
+
+    QmlEnginePrivate *p = QmlEnginePrivate::get(engine);
+
+    a->next = p->componentAttacheds;
+    a->prev = &p->componentAttacheds;
+    if (a->next) a->next->prev = &a->next;
+    p->componentAttacheds = a;
+
+    return a;
+}
+
 QT_END_NAMESPACE
diff --git a/src/declarative/qml/qmlcomponent.h b/src/declarative/qml/qmlcomponent.h
index c6924e3..dcf9347 100644
--- a/src/declarative/qml/qmlcomponent.h
+++ b/src/declarative/qml/qmlcomponent.h
@@ -59,6 +59,7 @@ class QmlCompiledData;
 class QByteArray;
 class QmlComponentPrivate;
 class QmlEngine;
+class QmlComponentAttached;
 class Q_DECLARATIVE_EXPORT QmlComponent : public QObject
 {
     Q_OBJECT
@@ -95,6 +96,8 @@ public:
     void loadUrl(const QUrl &url);
     void setData(const QByteArray &, const QUrl &baseUrl);
 
+    static QmlComponentAttached *qmlAttachedProperties(QObject *);
+
 Q_SIGNALS:
     void statusChanged(QmlComponent::Status);
     void progressChanged(qreal);
diff --git a/src/declarative/qml/qmlcomponent_p.h b/src/declarative/qml/qmlcomponent_p.h
index 2d0c77f..7eedfbd 100644
--- a/src/declarative/qml/qmlcomponent_p.h
+++ b/src/declarative/qml/qmlcomponent_p.h
@@ -70,12 +70,13 @@ class QmlComponent;
 class QmlEngine;
 class QmlCompiledData;
 
+class QmlComponentAttached;
 class QmlComponentPrivate : public QObjectPrivate
 {
     Q_DECLARE_PUBLIC(QmlComponent)
         
 public:
-    QmlComponentPrivate() : typeData(0), progress(0.), start(-1), count(-1), cc(0), completePending(false), engine(0) {}
+    QmlComponentPrivate() : typeData(0), progress(0.), start(-1), count(-1), cc(0), completePending(false), componentAttacheds(0), engine(0) {}
 
 
     QObject *create(QmlContext *context, const QBitField &);
@@ -98,6 +99,7 @@ public:
 
     QList<QmlEnginePrivate::SimpleList<QmlAbstractBinding> > bindValues;
     QList<QmlEnginePrivate::SimpleList<QmlParserStatus> > parserStatus;
+    QmlComponentAttached *componentAttacheds;
 
     bool completePending;
 
@@ -110,6 +112,23 @@ public:
     }
 };
 
+class QmlComponentAttached : public QObject
+{
+    Q_OBJECT
+public:
+    QmlComponentAttached(QObject *parent = 0);
+    ~QmlComponentAttached();
+
+    QmlComponentAttached **prev;
+    QmlComponentAttached *next;
+
+signals:
+    void completed();
+
+private:
+    friend class QmlComponentPrivate;
+};
+
 QT_END_NAMESPACE
 
 #endif // QMLCOMPONENT_P_H
diff --git a/src/declarative/qml/qmlengine.cpp b/src/declarative/qml/qmlengine.cpp
index ef0f975..7e95428 100644
--- a/src/declarative/qml/qmlengine.cpp
+++ b/src/declarative/qml/qmlengine.cpp
@@ -125,8 +125,8 @@ static QString userLocalDataPath(const QString& app)
 QmlEnginePrivate::QmlEnginePrivate(QmlEngine *e)
 : rootContext(0), currentExpression(0),
   isDebugging(false), contextClass(0), objectClass(0), valueTypeClass(0), globalClass(0),
-  nodeListClass(0), namedNodeMapClass(0), sqlQueryClass(0), scriptEngine(this), rootComponent(0),
-  networkAccessManager(0), typeManager(e), uniqueId(1)
+  nodeListClass(0), namedNodeMapClass(0), sqlQueryClass(0), scriptEngine(this), 
+  componentAttacheds(0), rootComponent(0), networkAccessManager(0), typeManager(e), uniqueId(1)
 {
     QScriptValue qtObject =
         scriptEngine.newQMetaObject(StaticQtMetaObject::get());
diff --git a/src/declarative/qml/qmlengine_p.h b/src/declarative/qml/qmlengine_p.h
index 7978023..4c90a80 100644
--- a/src/declarative/qml/qmlengine_p.h
+++ b/src/declarative/qml/qmlengine_p.h
@@ -95,6 +95,7 @@ class QmlAbstractBinding;
 class QScriptDeclarativeClass;
 class QmlTypeNameScriptClass;
 class QmlTypeNameCache;
+class QmlComponentAttached;
 
 class QmlEnginePrivate : public QObjectPrivate
 {
@@ -174,6 +175,7 @@ public:
 
     QList<SimpleList<QmlAbstractBinding> > bindValues;
     QList<SimpleList<QmlParserStatus> > parserStatus;
+    QmlComponentAttached *componentAttacheds;
 
     QmlComponent *rootComponent;
     mutable QNetworkAccessManager *networkAccessManager;