diff options
Diffstat (limited to 'src/declarative/qml/qdeclarativecontext.cpp')
-rw-r--r-- | src/declarative/qml/qdeclarativecontext.cpp | 50 |
1 files changed, 14 insertions, 36 deletions
diff --git a/src/declarative/qml/qdeclarativecontext.cpp b/src/declarative/qml/qdeclarativecontext.cpp index 6657fea..ae4223e 100644 --- a/src/declarative/qml/qdeclarativecontext.cpp +++ b/src/declarative/qml/qdeclarativecontext.cpp @@ -114,7 +114,7 @@ QDeclarativeContextPrivate::QDeclarativeContextPrivate() \endcode All properties added explicitly by QDeclarativeContext::setContextProperty() take - precedence over context object's properties. + precedence over the context object's properties. Contexts form a hierarchy. The root of this heirarchy is the QDeclarativeEngine's \l {QDeclarativeEngine::rootContext()}{root context}. A component instance can @@ -140,6 +140,11 @@ QDeclarativeContextPrivate::QDeclarativeContextPrivate() While QML objects instantiated in a context are not strictly owned by that context, their bindings are. If a context is destroyed, the property bindings of outstanding QML objects will stop evaluating. + + \note Setting the context object or adding new context properties after an object + has been created in that context is an expensive operation (essentially forcing all bindings + to reevaluate). Thus whenever possible you should complete "setup" of the context + before using it to create any objects. */ /*! \internal */ @@ -203,6 +208,12 @@ QDeclarativeContext::~QDeclarativeContext() d->data->destroy(); } +/*! + Returns whether the context is valid. + + To be valid, a context must have a engine, and it's contextObject(), if any, + must not have been deleted. +*/ bool QDeclarativeContext::isValid() const { Q_D(const QDeclarativeContext); @@ -655,7 +666,7 @@ void QDeclarativeContextData::addImportedScript(const QDeclarativeParser::Object if (scriptEngine->hasUncaughtException()) { QDeclarativeError error; QDeclarativeExpressionPrivate::exceptionToError(scriptEngine, error); - qWarning().nospace() << qPrintable(error.toString()); + enginePriv->warning(error); } scriptEngine->popContext(); @@ -681,7 +692,7 @@ void QDeclarativeContextData::addImportedScript(const QDeclarativeParser::Object if (scriptEngine->hasUncaughtException()) { QDeclarativeError error; QDeclarativeExpressionPrivate::exceptionToError(scriptEngine, error); - qWarning().nospace() << qPrintable(error.toString()); + enginePriv->warning(error); } scriptEngine->popContext(); @@ -691,39 +702,6 @@ void QDeclarativeContextData::addImportedScript(const QDeclarativeParser::Object } } -void QDeclarativeContextData::addScript(const QDeclarativeParser::Object::ScriptBlock &script, - QObject *scopeObject) -{ - if (!engine) - return; - - QDeclarativeEnginePrivate *enginePriv = QDeclarativeEnginePrivate::get(engine); - QScriptEngine *scriptEngine = QDeclarativeEnginePrivate::getScriptEngine(engine); - - QScriptContext *scriptContext = QScriptDeclarativeClass::pushCleanContext(scriptEngine); - - scriptContext->pushScope(enginePriv->contextClass->newContext(this, scopeObject)); - scriptContext->pushScope(enginePriv->globalClass->globalObject()); - - QScriptValue scope = scriptEngine->newObject(); - scriptContext->setActivationObject(scope); - scriptContext->pushScope(scope); - - for (int ii = 0; ii < script.codes.count(); ++ii) { - scriptEngine->evaluate(script.codes.at(ii), script.files.at(ii), script.lineNumbers.at(ii)); - - if (scriptEngine->hasUncaughtException()) { - QDeclarativeError error; - QDeclarativeExpressionPrivate::exceptionToError(scriptEngine, error); - qWarning().nospace() << qPrintable(error.toString()); - } - } - - scriptEngine->popContext(); - - scripts.append(scope); -} - void QDeclarativeContextData::setIdProperty(int idx, QObject *obj) { idValues[idx] = obj; |