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** This file is part of the QtDeclarative module of the Qt Toolkit.
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** contained in the Technology Preview License Agreement accompanying
** this package.
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#include "qdeclarativecomponent.h"
#include "private/qdeclarativecomponent_p.h"
#include "private/qdeclarativecompiler_p.h"
#include "private/qdeclarativecontext_p.h"
#include "private/qdeclarativecompositetypedata_p.h"
#include "private/qdeclarativeengine_p.h"
#include "private/qdeclarativevme_p.h"
#include "qdeclarative.h"
#include "qdeclarativeengine.h"
#include "private/qdeclarativebinding_p.h"
#include "private/qdeclarativebinding_p_p.h"
#include "private/qdeclarativeglobal_p.h"
#include "private/qdeclarativescriptparser_p.h"
#include "private/qdeclarativedebugtrace_p.h"
#include <QStack>
#include <QStringList>
#include <QFileInfo>
#include <QtCore/qdebug.h>
#include <QApplication>
QT_BEGIN_NAMESPACE
class QByteArray;
/*!
\class QDeclarativeComponent
\since 4.7
\brief The QDeclarativeComponent class encapsulates a QML component definition.
\mainclass
Components are reusable, encapsulated QML elements with well-defined interfaces.
They are often defined in \l {qdeclarativedocuments.html}{Component Files}.
A QDeclarativeComponent instance can be created from a QML file.
For example, if there is a \c main.qml file like this:
\qml
import Qt 4.7
Item {
width: 200
height: 200
}
\endqml
The following code loads this QML file as a component, creates an instance of
this component using create(), and then queries the \l Item's \l {Item::}{width}
value:
\code
QDeclarativeEngine *engine = new QDeclarativeEngine;
QDeclarativeComponent component(engine, QUrl::fromLocalFile("main.qml"));
QObject *myObject = component.create();
QDeclarativeItem *item = qobject_cast<QDeclarativeItem*>(myObject);
int width = item->width(); // width = 200
\endcode
\sa {Using QML in C++ Applications}, {Integrating QML with existing Qt UI code}
*/
/*!
\qmlclass Component QDeclarativeComponent
\since 4.7
\brief The Component element encapsulates a QML component definition.
Components are reusable, encapsulated QML elements with well-defined interfaces.
Components are often defined by \l {qdeclarativedocuments.html}{component files} -
that is, \c .qml files. The \e Component element allows components to be defined
within QML items rather than in a separate file. This may be useful for reusing
a small component within a QML file, or for defining a component that logically
belongs with other QML components within a file.
For example, here is a component that is used by multiple \l Loader objects:
\qml
Item {
Component {
id: redSquare
Rectangle {
color: "red"
width: 10
height: 10
}
}
Loader { sourceComponent: redSquare }
Loader { sourceComponent: redSquare; x: 20 }
}
\endqml
Notice that while a \l Rectangle by itself would be automatically
rendered and displayed, this is not the case for the above rectangle
because it is defined inside a \c Component. The component encapsulates the
QML elements within, as if they were defined in a separate \c .qml
file, and is not loaded until requested (in this case, by the
two \l Loader objects).
The Component element is commonly used to provide graphical components
for views. For example, the ListView::delegate property requires a Component
to specify how each list item is to be displayed.
Component objects can also be dynamically generated using
\l{Qt::createComponent}{Qt.createComponent()}.
*/
/*!
\qmlattachedsignal Component::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: console.log("Completed Running!")
Rectangle {
Component.onCompleted: console.log("Nested Completed Running!")
}
}
\endqml
*/
/*!
\qmlattachedsignal Component::onDestruction()
Emitted as the component begins destruction. This can be used to undo
work done in the onCompleted signal, or other imperative code in your
application.
The \c {Component::onDestruction} attached property can be applied to
any element. However, it applies to the destruction of the component as
a whole, and not the destruction of the specific object. The order of
running the \c onDestruction scripts is undefined.
\qml
Rectangle {
Component.onDestruction: console.log("Destruction Beginning!")
Rectangle {
Component.onDestruction: console.log("Nested Destruction Beginning!")
}
}
\endqml
\sa QtDeclarative
*/
/*!
\enum QDeclarativeComponent::Status
Specifies the loading status of the QDeclarativeComponent.
\value Null This QDeclarativeComponent has no data. Call loadUrl() or setData() to add QML content.
\value Ready This QDeclarativeComponent is ready and create() may be called.
\value Loading This QDeclarativeComponent is loading network data.
\value Error An error has occured. Call errors() to retrieve a list of \{QDeclarativeError}{errors}.
*/
void QDeclarativeComponentPrivate::typeDataReady()
{
Q_Q(QDeclarativeComponent);
Q_ASSERT(typeData);
fromTypeData(typeData);
typeData = 0;
emit q->statusChanged(q->status());
}
void QDeclarativeComponentPrivate::updateProgress(qreal p)
{
Q_Q(QDeclarativeComponent);
progress = p;
emit q->progressChanged(p);
}
void QDeclarativeComponentPrivate::fromTypeData(QDeclarativeCompositeTypeData *data)
{
url = data->imports.baseUrl();
QDeclarativeCompiledData *c = data->toCompiledComponent(engine);
if (!c) {
Q_ASSERT(data->status == QDeclarativeCompositeTypeData::Error);
state.errors = data->errors;
} else {
cc = c;
}
data->release();
}
void QDeclarativeComponentPrivate::clear()
{
if (typeData) {
typeData->remWaiter(this);
typeData->release();
typeData = 0;
}
if (cc) {
cc->release();
cc = 0;
}
}
/*!
\internal
*/
QDeclarativeComponent::QDeclarativeComponent(QObject *parent)
: QObject(*(new QDeclarativeComponentPrivate), parent)
{
}
/*!
Destruct the QDeclarativeComponent.
*/
QDeclarativeComponent::~QDeclarativeComponent()
{
Q_D(QDeclarativeComponent);
if (d->state.completePending) {
qWarning("QDeclarativeComponent: Component destroyed while completion pending");
d->completeCreate();
}
if (d->typeData) {
d->typeData->remWaiter(d);
d->typeData->release();
}
if (d->cc)
d->cc->release();
}
/*!
\qmlproperty enumeration Component::status
This property holds the status of component loading. It can be one of:
\list
\o Component.Null - no data is available for the component
\o Component.Ready - the component has been loaded, and can be used to create instances.
\o Component.Loading - the component is currently being loaded
\o Component.Error - an error occurred while loading the component.
Calling errorString() will provide a human-readable description of any errors.
\endlist
*/
/*!
\property QDeclarativeComponent::status
The component's current \l{QDeclarativeComponent::Status} {status}.
*/
QDeclarativeComponent::Status QDeclarativeComponent::status() const
{
Q_D(const QDeclarativeComponent);
if (d->typeData)
return Loading;
else if (!d->state.errors.isEmpty())
return Error;
else if (d->engine && d->cc)
return Ready;
else
return Null;
}
/*!
Returns true if status() == QDeclarativeComponent::Null.
*/
bool QDeclarativeComponent::isNull() const
{
return status() == Null;
}
/*!
Returns true if status() == QDeclarativeComponent::Ready.
*/
bool QDeclarativeComponent::isReady() const
{
return status() == Ready;
}
/*!
Returns true if status() == QDeclarativeComponent::Error.
*/
bool QDeclarativeComponent::isError() const
{
return status() == Error;
}
/*!
Returns true if status() == QDeclarativeComponent::Loading.
*/
bool QDeclarativeComponent::isLoading() const
{
return status() == Loading;
}
/*!
\qmlproperty real Component::progress
The progress of loading the component, from 0.0 (nothing loaded)
to 1.0 (finished).
*/
/*!
\property QDeclarativeComponent::progress
The progress of loading the component, from 0.0 (nothing loaded)
to 1.0 (finished).
*/
qreal QDeclarativeComponent::progress() const
{
Q_D(const QDeclarativeComponent);
return d->progress;
}
/*!
\fn void QDeclarativeComponent::progressChanged(qreal progress)
Emitted whenever the component's loading progress changes. \a progress will be the
current progress between 0.0 (nothing loaded) and 1.0 (finished).
*/
/*!
\fn void QDeclarativeComponent::statusChanged(QDeclarativeComponent::Status status)
Emitted whenever the component's status changes. \a status will be the
new status.
*/
/*!
Create a QDeclarativeComponent with no data and give it the specified
\a engine and \a parent. Set the data with setData().
*/
QDeclarativeComponent::QDeclarativeComponent(QDeclarativeEngine *engine, QObject *parent)
: QObject(*(new QDeclarativeComponentPrivate), parent)
{
Q_D(QDeclarativeComponent);
d->engine = engine;
}
/*!
Create a QDeclarativeComponent from the given \a url and give it the
specified \a parent and \a engine.
Ensure that the URL provided is full and correct, in particular, use
\l QUrl::fromLocalFile() when loading a file from the local filesystem.
\sa loadUrl()
*/
QDeclarativeComponent::QDeclarativeComponent(QDeclarativeEngine *engine, const QUrl &url, QObject *parent)
: QObject(*(new QDeclarativeComponentPrivate), parent)
{
Q_D(QDeclarativeComponent);
d->engine = engine;
loadUrl(url);
}
/*!
Create a QDeclarativeComponent from the given \a fileName and give it the specified
\a parent and \a engine.
\sa loadUrl()
*/
QDeclarativeComponent::QDeclarativeComponent(QDeclarativeEngine *engine, const QString &fileName,
QObject *parent)
: QObject(*(new QDeclarativeComponentPrivate), parent)
{
Q_D(QDeclarativeComponent);
d->engine = engine;
loadUrl(d->engine->baseUrl().resolved(QUrl::fromLocalFile(fileName)));
}
/*!
\internal
*/
QDeclarativeComponent::QDeclarativeComponent(QDeclarativeEngine *engine, QDeclarativeCompiledData *cc, int start, int count, QObject *parent)
: QObject(*(new QDeclarativeComponentPrivate), parent)
{
Q_D(QDeclarativeComponent);
d->engine = engine;
d->cc = cc;
cc->addref();
d->start = start;
d->count = count;
d->url = cc->url;
d->progress = 1.0;
}
/*!
Sets the QDeclarativeComponent to use the given QML \a data. If \a url
is provided, it is used to set the component name and to provide
a base path for items resolved by this component.
*/
void QDeclarativeComponent::setData(const QByteArray &data, const QUrl &url)
{
Q_D(QDeclarativeComponent);
d->clear();
d->url = url;
QDeclarativeCompositeTypeData *typeData =
QDeclarativeEnginePrivate::get(d->engine)->typeManager.getImmediate(data, url);
if (typeData->status == QDeclarativeCompositeTypeData::Waiting
|| typeData->status == QDeclarativeCompositeTypeData::WaitingResources)
{
d->typeData = typeData;
d->typeData->addWaiter(d);
} else {
d->fromTypeData(typeData);
}
d->progress = 1.0;
emit statusChanged(status());
emit progressChanged(d->progress);
}
/*!
Returns the QDeclarativeContext the component was created in. This is only
valid for components created directly from QML.
*/
QDeclarativeContext *QDeclarativeComponent::creationContext() const
{
Q_D(const QDeclarativeComponent);
if(d->creationContext)
return d->creationContext->asQDeclarativeContext();
return qmlContext(this);
}
/*!
Load the QDeclarativeComponent from the provided \a url.
Ensure that the URL provided is full and correct, in particular, use
\l QUrl::fromLocalFile() when loading a file from the local filesystem.
*/
void QDeclarativeComponent::loadUrl(const QUrl &url)
{
Q_D(QDeclarativeComponent);
d->clear();
if ((url.isRelative() && !url.isEmpty())
|| url.scheme() == QLatin1String("file")) // Workaround QTBUG-11929
d->url = d->engine->baseUrl().resolved(url);
else
d->url = url;
if (url.isEmpty()) {
QDeclarativeError error;
error.setDescription(tr("Invalid empty URL"));
d->state.errors << error;
return;
}
QDeclarativeCompositeTypeData *data =
QDeclarativeEnginePrivate::get(d->engine)->typeManager.get(d->url);
if (data->status == QDeclarativeCompositeTypeData::Waiting
|| data->status == QDeclarativeCompositeTypeData::WaitingResources)
{
d->typeData = data;
d->typeData->addWaiter(d);
d->progress = data->progress;
} else {
d->fromTypeData(data);
d->progress = 1.0;
}
emit statusChanged(status());
emit progressChanged(d->progress);
}
/*!
Return the list of errors that occured during the last compile or create
operation. An empty list is returned if isError() is not set.
*/
QList<QDeclarativeError> QDeclarativeComponent::errors() const
{
Q_D(const QDeclarativeComponent);
if (isError())
return d->state.errors;
else
return QList<QDeclarativeError>();
}
/*!
\qmlmethod string Component::errorString()
Returns a human-readable description of any errors.
The string includes the file, location, and description of each error.
If multiple errors are present they are separated by a newline character.
If no errors are present, an empty string is returned.
*/
/*!
\internal
errorString is only meant as a way to get the errors in script
*/
QString QDeclarativeComponent::errorString() const
{
Q_D(const QDeclarativeComponent);
QString ret;
if(!isError())
return ret;
foreach(const QDeclarativeError &e, d->state.errors) {
ret += e.url().toString() + QLatin1Char(':') +
QString::number(e.line()) + QLatin1Char(' ') +
e.description() + QLatin1Char('\n');
}
return ret;
}
/*!
\qmlproperty url Component::url
The component URL. This is the URL that was used to construct the component.
*/
/*!
\property QDeclarativeComponent::url
The component URL. This is the URL passed to either the constructor,
or the loadUrl() or setData() methods.
*/
QUrl QDeclarativeComponent::url() const
{
Q_D(const QDeclarativeComponent);
return d->url;
}
/*!
\internal
*/
QDeclarativeComponent::QDeclarativeComponent(QDeclarativeComponentPrivate &dd, QObject *parent)
: QObject(dd, parent)
{
}
/*!
\qmlmethod object Component::createObject(parent)
Creates and returns an object instance of this component that will have the given
\a parent. Returns null if object creation fails.
The object will be created in the same context as the one in which the component
was created. This function will always return null when called on components
which were not created in QML.
If you wish to create an object without setting a parent, specify \c null for
the \a parent value. Note that if the returned object is to be displayed, you
must provide a valid \a parent value or set the returned object's \l{Item::parent}{parent}
property, or else the object will not be visible.
*/
/*!
\internal
A version of create which returns a scriptObject, for use in script.
This function will only work on components created in QML.
Sets graphics object parent because forgetting to do this is a frequent
and serious problem.
*/
QScriptValue QDeclarativeComponent::createObject(QObject* parent)
{
Q_D(QDeclarativeComponent);
QDeclarativeContext* ctxt = creationContext();
if(!ctxt && d->engine)
ctxt = d->engine->rootContext();
if (!ctxt)
return QScriptValue(QScriptValue::NullValue);
QObject* ret = create(ctxt);
if (!ret)
return QScriptValue(QScriptValue::NullValue);
if (parent) {
ret->setParent(parent);
QList<QDeclarativePrivate::AutoParentFunction> functions = QDeclarativeMetaType::parentFunctions();
bool needParent = false;
for (int ii = 0; ii < functions.count(); ++ii) {
QDeclarativePrivate::AutoParentResult res = functions.at(ii)(ret, parent);
if (res == QDeclarativePrivate::Parented) {
needParent = false;
break;
} else if (res == QDeclarativePrivate::IncompatibleParent) {
needParent = true;
}
}
if (needParent)
qWarning("QDeclarativeComponent: Created graphical object was not placed in the graphics scene.");
}
QDeclarativeEnginePrivate *priv = QDeclarativeEnginePrivate::get(d->engine);
QDeclarativeData::get(ret, true)->setImplicitDestructible();
return priv->objectClass->newQObject(ret, QMetaType::QObjectStar);
}
/*!
Create an object instance from this component. Returns 0 if creation
failed. \a context specifies the context within which to create the object
instance.
If \a context is 0 (the default), it will create the instance in the
engine' s \l {QDeclarativeEngine::rootContext()}{root context}.
*/
QObject *QDeclarativeComponent::create(QDeclarativeContext *context)
{
Q_D(QDeclarativeComponent);
if (!context)
context = d->engine->rootContext();
QObject *rv = beginCreate(context);
completeCreate();
return rv;
}
QObject *QDeclarativeComponentPrivate::create(QDeclarativeContextData *context,
const QBitField &bindings)
{
if (!context)
context = QDeclarativeContextData::get(engine->rootContext());
QObject *rv = beginCreate(context, bindings);
completeCreate();
return rv;
}
/*!
This method provides more advanced control over component instance creation.
In general, programmers should use QDeclarativeComponent::create() to create a
component.
Create an object instance from this component. Returns 0 if creation
failed. \a context specifies the context within which to create the object
instance.
When QDeclarativeComponent constructs an instance, it occurs in three steps:
\list 1
\i The object hierarchy is created, and constant values are assigned.
\i Property bindings are evaluated for the the first time.
\i If applicable, QDeclarativeParserStatus::componentComplete() is called on objects.
\endlist
QDeclarativeComponent::beginCreate() differs from QDeclarativeComponent::create() in that it
only performs step 1. QDeclarativeComponent::completeCreate() must be called to
complete steps 2 and 3.
This breaking point is sometimes useful when using attached properties to
communicate information to an instantiated component, as it allows their
initial values to be configured before property bindings take effect.
*/
QObject *QDeclarativeComponent::beginCreate(QDeclarativeContext *context)
{
Q_D(QDeclarativeComponent);
QObject *rv = d->beginCreate(context?QDeclarativeContextData::get(context):0, QBitField());
if (rv) {
QDeclarativeData *ddata = QDeclarativeData::get(rv);
Q_ASSERT(ddata);
ddata->indestructible = true;
}
return rv;
}
QObject *
QDeclarativeComponentPrivate::beginCreate(QDeclarativeContextData *context, const QBitField &bindings)
{
Q_Q(QDeclarativeComponent);
if (!context) {
qWarning("QDeclarativeComponent: Cannot create a component in a null context");
return 0;
}
if (!context->isValid()) {
qWarning("QDeclarativeComponent: Cannot create a component in an invalid context");
return 0;
}
if (context->engine != engine) {
qWarning("QDeclarativeComponent: Must create component in context from the same QDeclarativeEngine");
return 0;
}
if (state.completePending) {
qWarning("QDeclarativeComponent: Cannot create new component instance before completing the previous");
return 0;
}
if (!q->isReady()) {
qWarning("QDeclarativeComponent: Component is not ready");
return 0;
}
QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
bool isRoot = !ep->inBeginCreate;
if (isRoot)
QDeclarativeDebugTrace::startRange(QDeclarativeDebugTrace::Creating);
QDeclarativeDebugTrace::rangeData(QDeclarativeDebugTrace::Creating, cc->url);
QDeclarativeContextData *ctxt = new QDeclarativeContextData;
ctxt->isInternal = true;
ctxt->url = cc->url;
ctxt->imports = cc->importCache;
// Nested global imports
if (creationContext && start != -1)
ctxt->importedScripts = creationContext->importedScripts;
cc->importCache->addref();
ctxt->setParent(context);
QObject *rv = begin(ctxt, ep, cc, start, count, &state, bindings);
if (rv && !context->isInternal && ep->isDebugging)
context->asQDeclarativeContextPrivate()->instances.append(rv);
return rv;
}
QObject * QDeclarativeComponentPrivate::begin(QDeclarativeContextData *ctxt, QDeclarativeEnginePrivate *enginePriv,
QDeclarativeCompiledData *component, int start, int count,
ConstructionState *state, const QBitField &bindings)
{
bool isRoot = !enginePriv->inBeginCreate;
enginePriv->inBeginCreate = true;
QDeclarativeVME vme;
QObject *rv = vme.run(ctxt, component, start, count, bindings);
if (vme.isError())
state->errors = vme.errors();
if (isRoot) {
enginePriv->inBeginCreate = false;
state->bindValues = enginePriv->bindValues;
state->parserStatus = enginePriv->parserStatus;
state->finalizedParserStatus = enginePriv->finalizedParserStatus;
state->componentAttached = enginePriv->componentAttached;
if (state->componentAttached)
state->componentAttached->prev = &state->componentAttached;
enginePriv->componentAttached = 0;
enginePriv->bindValues.clear();
enginePriv->parserStatus.clear();
enginePriv->finalizedParserStatus.clear();
state->completePending = true;
enginePriv->inProgressCreations++;
}
return rv;
}
void QDeclarativeComponentPrivate::beginDeferred(QDeclarativeEnginePrivate *enginePriv,
QObject *object, ConstructionState *state)
{
bool isRoot = !enginePriv->inBeginCreate;
enginePriv->inBeginCreate = true;
QDeclarativeVME vme;
vme.runDeferred(object);
if (vme.isError())
state->errors = vme.errors();
if (isRoot) {
enginePriv->inBeginCreate = false;
state->bindValues = enginePriv->bindValues;
state->parserStatus = enginePriv->parserStatus;
state->finalizedParserStatus = enginePriv->finalizedParserStatus;
state->componentAttached = enginePriv->componentAttached;
if (state->componentAttached)
state->componentAttached->prev = &state->componentAttached;
enginePriv->componentAttached = 0;
enginePriv->bindValues.clear();
enginePriv->parserStatus.clear();
enginePriv->finalizedParserStatus.clear();
state->completePending = true;
enginePriv->inProgressCreations++;
}
}
void QDeclarativeComponentPrivate::complete(QDeclarativeEnginePrivate *enginePriv, ConstructionState *state)
{
if (state->completePending) {
for (int ii = 0; ii < state->bindValues.count(); ++ii) {
QDeclarativeEnginePrivate::SimpleList<QDeclarativeAbstractBinding> bv =
state->bindValues.at(ii);
for (int jj = 0; jj < bv.count; ++jj) {
if(bv.at(jj))
bv.at(jj)->setEnabled(true, QDeclarativePropertyPrivate::BypassInterceptor |
QDeclarativePropertyPrivate::DontRemoveBinding);
}
QDeclarativeEnginePrivate::clear(bv);
}
for (int ii = 0; ii < state->parserStatus.count(); ++ii) {
QDeclarativeEnginePrivate::SimpleList<QDeclarativeParserStatus> ps =
state->parserStatus.at(ii);
for (int jj = ps.count - 1; jj >= 0; --jj) {
QDeclarativeParserStatus *status = ps.at(jj);
if (status && status->d) {
status->d = 0;
status->componentComplete();
}
}
QDeclarativeEnginePrivate::clear(ps);
}
for (int ii = 0; ii < state->finalizedParserStatus.count(); ++ii) {
QPair<QDeclarativeGuard<QObject>, int> status = state->finalizedParserStatus.at(ii);
QObject *obj = status.first;
if (obj) {
void *args[] = { 0 };
QMetaObject::metacall(obj, QMetaObject::InvokeMetaMethod,
status.second, args);
}
}
while (state->componentAttached) {
QDeclarativeComponentAttached *a = state->componentAttached;
a->rem();
QDeclarativeData *d = QDeclarativeData::get(a->parent());
Q_ASSERT(d);
Q_ASSERT(d->context);
a->add(&d->context->componentAttached);
emit a->completed();
}
state->bindValues.clear();
state->parserStatus.clear();
state->finalizedParserStatus.clear();
state->completePending = false;
enginePriv->inProgressCreations--;
if (0 == enginePriv->inProgressCreations) {
while (enginePriv->erroredBindings) {
enginePriv->warning(enginePriv->erroredBindings->error);
enginePriv->erroredBindings->removeError();
}
}
}
}
/*!
This method provides more advanced control over component instance creation.
In general, programmers should use QDeclarativeComponent::create() to create a
component.
Complete a component creation begin with QDeclarativeComponent::beginCreate().
*/
void QDeclarativeComponent::completeCreate()
{
Q_D(QDeclarativeComponent);
d->completeCreate();
}
void QDeclarativeComponentPrivate::completeCreate()
{
if (state.completePending) {
QDeclarativeEnginePrivate *ep = QDeclarativeEnginePrivate::get(engine);
complete(ep, &state);
QDeclarativeDebugTrace::endRange(QDeclarativeDebugTrace::Creating);
}
}
QDeclarativeComponentAttached::QDeclarativeComponentAttached(QObject *parent)
: QObject(parent), prev(0), next(0)
{
}
QDeclarativeComponentAttached::~QDeclarativeComponentAttached()
{
if (prev) *prev = next;
if (next) next->prev = prev;
prev = 0;
next = 0;
}
/*!
\internal
*/
QDeclarativeComponentAttached *QDeclarativeComponent::qmlAttachedProperties(QObject *obj)
{
QDeclarativeComponentAttached *a = new QDeclarativeComponentAttached(obj);
QDeclarativeEngine *engine = qmlEngine(obj);
if (!engine)
return a;
if (QDeclarativeEnginePrivate::get(engine)->inBeginCreate) {
QDeclarativeEnginePrivate *p = QDeclarativeEnginePrivate::get(engine);
a->add(&p->componentAttached);
} else {
QDeclarativeData *d = QDeclarativeData::get(obj);
Q_ASSERT(d);
Q_ASSERT(d->context);
a->add(&d->context->componentAttached);
}
return a;
}
QT_END_NAMESPACE