diff options
Diffstat (limited to 'src/declarative/util/qdeclarativelistmodel.cpp')
| -rw-r--r-- | src/declarative/util/qdeclarativelistmodel.cpp | 400 |
1 files changed, 318 insertions, 82 deletions
diff --git a/src/declarative/util/qdeclarativelistmodel.cpp b/src/declarative/util/qdeclarativelistmodel.cpp index cf2eada..2d8b946 100644 --- a/src/declarative/util/qdeclarativelistmodel.cpp +++ b/src/declarative/util/qdeclarativelistmodel.cpp @@ -58,6 +58,28 @@ Q_DECLARE_METATYPE(QListModelInterface *) QT_BEGIN_NAMESPACE +template<typename T> +void qdeclarativelistmodel_move(int from, int to, int n, T *items) +{ + if (n == 1) { + items->move(from, to); + } else { + T replaced; + int i=0; + typename T::ConstIterator it=items->begin(); it += from+n; + for (; i<to-from; ++i,++it) + replaced.append(*it); + i=0; + it=items->begin(); it += from; + for (; i<n; ++i,++it) + replaced.append(*it); + typename T::ConstIterator f=replaced.begin(); + typename T::Iterator t=items->begin(); t += from; + for (; f != replaced.end(); ++f, ++t) + *t = *f; + } +} + QDeclarativeListModelParser::ListInstruction *QDeclarativeListModelParser::ListModelData::instructions() const { return (QDeclarativeListModelParser::ListInstruction *)((char *)this + sizeof(ListModelData)); @@ -154,10 +176,10 @@ QDeclarativeListModelParser::ListInstruction *QDeclarativeListModelParser::ListM handler. You must call sync() or else the changes made to the list from the external thread will not be reflected in the list model in the main thread. - \section1 Limitations + \section1 Restrictions - If a list model is to be accessed from a WorkerScript, it \bold cannot - contain list data. So, the following model cannot be used from a WorkerScript + If a list model is to be accessed from a WorkerScript, it cannot + contain list-type data. So, the following model cannot be used from a WorkerScript because of the list contained in the "attributes" property: \code @@ -174,7 +196,7 @@ QDeclarativeListModelParser::ListInstruction *QDeclarativeListModelParser::ListM } \endcode - In addition, the WorkerScript cannot add any list data to the model. + In addition, the WorkerScript cannot add list-type data to the model. \sa {qmlmodels}{Data Models}, {declarative/threading/threadedlistmodel}{Threaded ListModel example}, QtDeclarative */ @@ -195,17 +217,25 @@ QDeclarativeListModelParser::ListInstruction *QDeclarativeListModelParser::ListM */ QDeclarativeListModel::QDeclarativeListModel(QObject *parent) -: QListModelInterface(parent), m_agent(0), m_nested(new NestedListModel(this)), m_flat(0), m_isWorkerCopy(false) +: QListModelInterface(parent), m_agent(0), m_nested(new NestedListModel(this)), m_flat(0) { } -QDeclarativeListModel::QDeclarativeListModel(bool workerCopy, QObject *parent) -: QListModelInterface(parent), m_agent(0), m_nested(0), m_flat(0), m_isWorkerCopy(workerCopy) +QDeclarativeListModel::QDeclarativeListModel(const QDeclarativeListModel *orig, QDeclarativeListModelWorkerAgent *parent) +: QListModelInterface(parent), m_agent(0), m_nested(0), m_flat(0) { - if (workerCopy) - m_flat = new FlatListModel(this); - else - m_nested = new NestedListModel(this); + m_flat = new FlatListModel(this); + m_flat->m_parentAgent = parent; + + if (orig->m_flat) { + m_flat->m_roles = orig->m_flat->m_roles; + m_flat->m_strings = orig->m_flat->m_strings; + m_flat->m_values = orig->m_flat->m_values; + + m_flat->m_nodeData.reserve(m_flat->m_values.count()); + for (int i=0; i<m_flat->m_values.count(); i++) + m_flat->m_nodeData << 0; + } } QDeclarativeListModel::~QDeclarativeListModel() @@ -241,19 +271,28 @@ bool QDeclarativeListModel::flatten() flat->m_strings.insert(s, roles[i]); } + flat->m_nodeData.reserve(flat->m_values.count()); + for (int i=0; i<flat->m_values.count(); i++) + flat->m_nodeData << 0; + m_flat = flat; delete m_nested; m_nested = 0; return true; } +bool QDeclarativeListModel::inWorkerThread() const +{ + return m_flat && m_flat->m_parentAgent; +} + QDeclarativeListModelWorkerAgent *QDeclarativeListModel::agent() { if (m_agent) return m_agent; if (!flatten()) { - qmlInfo(this) << "List contains nested list values and cannot be used from a worker script"; + qmlInfo(this) << "List contains list-type data and cannot be used from a worker script"; return 0; } @@ -311,7 +350,7 @@ void QDeclarativeListModel::clear() else m_nested->clear(); - if (!m_isWorkerCopy) { + if (!inWorkerThread()) { emit itemsRemoved(0, cleared); emit countChanged(); } @@ -336,7 +375,7 @@ void QDeclarativeListModel::remove(int index) else m_nested->remove(index); - if (!m_isWorkerCopy) { + if (!inWorkerThread()) { emit itemsRemoved(index, 1); emit countChanged(); } @@ -370,7 +409,7 @@ void QDeclarativeListModel::insert(int index, const QScriptValue& valuemap) } bool ok = m_flat ? m_flat->insert(index, valuemap) : m_nested->insert(index, valuemap); - if (ok && !m_isWorkerCopy) { + if (ok && !inWorkerThread()) { emit itemsInserted(index, 1); emit countChanged(); } @@ -394,7 +433,7 @@ void QDeclarativeListModel::move(int from, int to, int n) { if (n==0 || from==to) return; - if (from+n > count() || to+n > count() || from < 0 || to < 0 || n < 0) { + if (!canMove(from, to, n)) { qmlInfo(this) << tr("move: out of range"); return; } @@ -416,7 +455,7 @@ void QDeclarativeListModel::move(int from, int to, int n) else m_nested->move(from, to, n); - if (!m_isWorkerCopy) + if (!inWorkerThread()) emit itemsMoved(origfrom, origto, orign); } @@ -445,11 +484,15 @@ void QDeclarativeListModel::append(const QScriptValue& valuemap) /*! \qmlmethod object ListModel::get(int index) - Returns the item at \a index in the list model. + Returns the item at \a index in the list model. This allows the item + data to be accessed or modified from JavaScript: \code - fruitModel.append({"cost": 5.95, "name":"Jackfruit"}) - fruitModel.get(0).cost + Component.onCompleted: { + fruitModel.append({"cost": 5.95, "name":"Jackfruit"}); + console.log(fruitModel.get(0).cost); + fruitModel.get(0).cost = 10.95; + } \endcode The \a index must be an element in the list. @@ -464,6 +507,9 @@ void QDeclarativeListModel::append(const QScriptValue& valuemap) fruitModel.get(0).attributes.get(1).value; // == "green" \endcode + \warning The returned object is not guaranteed to remain valid. It + should not be used in \l{Property Binding}{property bindings}. + \sa append() */ QScriptValue QDeclarativeListModel::get(int index) const @@ -507,7 +553,7 @@ void QDeclarativeListModel::set(int index, const QScriptValue& valuemap) else m_nested->set(index, valuemap, &roles); - if (!m_isWorkerCopy) + if (!inWorkerThread()) emit itemsChanged(index, 1, roles); } } @@ -538,7 +584,7 @@ void QDeclarativeListModel::setProperty(int index, const QString& property, cons else m_nested->setProperty(index, property, value, &roles); - if (!m_isWorkerCopy) + if (!inWorkerThread()) emit itemsChanged(index, 1, roles); } @@ -705,7 +751,7 @@ void QDeclarativeListModelParser::setCustomData(QObject *obj, const QByteArray & { QDeclarativeListModel *rv = static_cast<QDeclarativeListModel *>(obj); - ModelNode *root = new ModelNode; + ModelNode *root = new ModelNode(rv->m_nested); rv->m_nested->_root = root; QStack<ModelNode *> nodes; nodes << root; @@ -722,7 +768,7 @@ void QDeclarativeListModelParser::setCustomData(QObject *obj, const QByteArray & case ListInstruction::Push: { ModelNode *n = nodes.top(); - ModelNode *n2 = new ModelNode; + ModelNode *n2 = new ModelNode(rv->m_nested); n->values << qVariantFromValue(n2); nodes.push(n2); if (processingSet) @@ -761,7 +807,7 @@ void QDeclarativeListModelParser::setCustomData(QObject *obj, const QByteArray & case ListInstruction::Set: { ModelNode *n = nodes.top(); - ModelNode *n2 = new ModelNode; + ModelNode *n2 = new ModelNode(rv->m_nested); n->properties.insert(QString::fromUtf8(data + instr.dataIdx), n2); nodes.push(n2); processingSet = true; @@ -769,6 +815,13 @@ void QDeclarativeListModelParser::setCustomData(QObject *obj, const QByteArray & break; } } + + ModelNode *rootNode = rv->m_nested->_root; + for (int i=0; i<rootNode->values.count(); ++i) { + ModelNode *node = qvariant_cast<ModelNode *>(rootNode->values[i]); + node->listIndex = i; + node->updateListIndexes(); + } } bool QDeclarativeListModelParser::definesEmptyList(const QString &s) @@ -783,6 +836,7 @@ bool QDeclarativeListModelParser::definesEmptyList(const QString &s) return false; } + /*! \qmlclass ListElement QDeclarativeListElement \ingroup qml-working-with-data @@ -826,12 +880,13 @@ bool QDeclarativeListModelParser::definesEmptyList(const QString &s) */ FlatListModel::FlatListModel(QDeclarativeListModel *base) - : m_scriptEngine(0), m_listModel(base) + : m_scriptEngine(0), m_listModel(base), m_scriptClass(0), m_parentAgent(0) { } FlatListModel::~FlatListModel() { + qDeleteAll(m_nodeData); } QHash<int,QVariant> FlatListModel::data(int index, const QList<int> &roles) const @@ -875,11 +930,15 @@ int FlatListModel::count() const void FlatListModel::clear() { m_values.clear(); + + qDeleteAll(m_nodeData); + m_nodeData.clear(); } void FlatListModel::remove(int index) { m_values.removeAt(index); + removedNode(index); } bool FlatListModel::append(const QScriptValue &value) @@ -896,6 +955,8 @@ bool FlatListModel::insert(int index, const QScriptValue &value) return false; m_values.insert(index, row); + insertedNode(index); + return true; } @@ -909,13 +970,17 @@ QScriptValue FlatListModel::get(int index) const if (index < 0 || index >= m_values.count()) return scriptEngine->undefinedValue(); - QScriptValue rv = scriptEngine->newObject(); + FlatListModel *that = const_cast<FlatListModel*>(this); + if (!m_scriptClass) + that->m_scriptClass = new FlatListScriptClass(that, scriptEngine); - QHash<int, QVariant> row = m_values.at(index); - for (QHash<int, QVariant>::ConstIterator iter = row.begin(); iter != row.end(); ++iter) - rv.setProperty(m_roles.value(iter.key()), qScriptValueFromValue(scriptEngine, iter.value())); + FlatNodeData *data = m_nodeData.value(index); + if (!data) { + data = new FlatNodeData(index); + that->m_nodeData.replace(index, data); + } - return rv; + return QScriptDeclarativeClass::newObject(scriptEngine, m_scriptClass, new FlatNodeObjectData(data)); } void FlatListModel::set(int index, const QScriptValue &value, QList<int> *roles) @@ -947,23 +1012,8 @@ void FlatListModel::setProperty(int index, const QString& property, const QVaria void FlatListModel::move(int from, int to, int n) { - if (n == 1) { - m_values.move(from, to); - } else { - QList<QHash<int, QVariant> > replaced; - int i=0; - QList<QHash<int, QVariant> >::ConstIterator it=m_values.begin(); it += from+n; - for (; i<to-from; ++i,++it) - replaced.append(*it); - i=0; - it=m_values.begin(); it += from; - for (; i<n; ++i,++it) - replaced.append(*it); - QList<QHash<int, QVariant> >::ConstIterator f=replaced.begin(); - QList<QHash<int, QVariant> >::Iterator t=m_values.begin(); t += from; - for (; f != replaced.end(); ++f, ++t) - *t = *f; - } + qdeclarativelistmodel_move<QList<QHash<int, QVariant> > >(from, to, n, &m_values); + moveNodes(from, to, n); } bool FlatListModel::addValue(const QScriptValue &value, QHash<int, QVariant> *row, QList<int> *roles) @@ -973,7 +1023,7 @@ bool FlatListModel::addValue(const QScriptValue &value, QHash<int, QVariant> *ro it.next(); QScriptValue value = it.value(); if (!value.isVariant() && !value.isRegExp() && !value.isDate() && value.isObject()) { - qmlInfo(m_listModel) << "Cannot add nested list values when modifying or after modification from a worker script"; + qmlInfo(m_listModel) << "Cannot add list-type data when modifying or after modification from a worker script"; return false; } @@ -993,6 +1043,139 @@ bool FlatListModel::addValue(const QScriptValue &value, QHash<int, QVariant> *ro return true; } +void FlatListModel::insertedNode(int index) +{ + if (index >= 0 && index <= m_values.count()) { + m_nodeData.insert(index, 0); + + for (int i=index + 1; i<m_nodeData.count(); i++) { + if (m_nodeData[i]) + m_nodeData[i]->index = i; + } + } +} + +void FlatListModel::removedNode(int index) +{ + if (index >= 0 && index < m_nodeData.count()) { + delete m_nodeData.takeAt(index); + + for (int i=index; i<m_nodeData.count(); i++) { + if (m_nodeData[i]) + m_nodeData[i]->index = i; + } + } +} + +void FlatListModel::moveNodes(int from, int to, int n) +{ + if (!m_listModel->canMove(from, to, n)) + return; + + qdeclarativelistmodel_move<QList<FlatNodeData *> >(from, to, n, &m_nodeData); + + for (int i=from; i<from + (to-from); i++) { + if (m_nodeData[i]) + m_nodeData[i]->index = i; + } +} + + + +FlatNodeData::~FlatNodeData() +{ + for (QSet<FlatNodeObjectData *>::Iterator iter = objects.begin(); iter != objects.end(); ++iter) { + FlatNodeObjectData *data = *iter; + data->nodeData = 0; + } +} + +void FlatNodeData::addData(FlatNodeObjectData *data) +{ + objects.insert(data); +} + +void FlatNodeData::removeData(FlatNodeObjectData *data) +{ + objects.remove(data); +} + + +FlatListScriptClass::FlatListScriptClass(FlatListModel *model, QScriptEngine *seng) + : QScriptDeclarativeClass(seng), + m_model(model) +{ +} + +QScriptDeclarativeClass::Value FlatListScriptClass::property(Object *obj, const Identifier &name) +{ + FlatNodeObjectData *objData = static_cast<FlatNodeObjectData*>(obj); + if (!objData->nodeData) // item at this index has been deleted + return QScriptDeclarativeClass::Value(engine(), engine()->undefinedValue()); + + int index = objData->nodeData->index; + QString propName = toString(name); + int role = m_model->m_strings.value(propName, -1); + + if (role >= 0 && index >=0 ) { + const QHash<int, QVariant> &row = m_model->m_values[index]; + QScriptValue sv = engine()->toScriptValue<QVariant>(row[role]); + return QScriptDeclarativeClass::Value(engine(), sv); + } + + return QScriptDeclarativeClass::Value(engine(), engine()->undefinedValue()); +} + +void FlatListScriptClass::setProperty(Object *obj, const Identifier &name, const QScriptValue &value) +{ + if (!value.isVariant() && !value.isRegExp() && !value.isDate() && value.isObject()) { + qmlInfo(m_model->m_listModel) << "Cannot add list-type data when modifying or after modification from a worker script"; + return; + } + + FlatNodeObjectData *objData = static_cast<FlatNodeObjectData*>(obj); + if (!objData->nodeData) // item at this index has been deleted + return; + + int index = objData->nodeData->index; + QString propName = toString(name); + + int role = m_model->m_strings.value(propName, -1); + if (role >= 0 && index >= 0) { + QHash<int, QVariant> &row = m_model->m_values[index]; + row[role] = value.toVariant(); + + if (m_model->m_parentAgent) { + // This is the list in the worker thread, so tell the agent to + // emit itemsChanged() later + m_model->m_parentAgent->changedData(index, 1); + } else { + // This is the list in the main thread, so emit itemsChanged() + QList<int> roles; + roles << role; + emit m_model->m_listModel->itemsChanged(index, 1, roles); + } + } +} + +QScriptClass::QueryFlags FlatListScriptClass::queryProperty(Object *, const Identifier &, QScriptClass::QueryFlags) +{ + return (QScriptClass::HandlesReadAccess | QScriptClass::HandlesWriteAccess); +} + +bool FlatListScriptClass::compare(Object *obj1, Object *obj2) +{ + FlatNodeObjectData *data1 = static_cast<FlatNodeObjectData*>(obj1); + FlatNodeObjectData *data2 = static_cast<FlatNodeObjectData*>(obj2); + + if (!data1->nodeData || !data2->nodeData) + return false; + + return data1->nodeData->index == data2->nodeData->index; +} + + + NestedListModel::NestedListModel(QDeclarativeListModel *base) : _root(0), m_ownsRoot(false), m_listModel(base), _rolesOk(false) { @@ -1118,11 +1301,12 @@ void NestedListModel::remove(int index) bool NestedListModel::insert(int index, const QScriptValue& valuemap) { if (!_root) { - _root = new ModelNode; + _root = new ModelNode(this); m_ownsRoot = true; } - ModelNode *mn = new ModelNode; + ModelNode *mn = new ModelNode(this); + mn->listIndex = index; mn->setObjectValue(valuemap); _root->values.insert(index,qVariantFromValue(mn)); return true; @@ -1130,34 +1314,19 @@ bool NestedListModel::insert(int index, const QScriptValue& valuemap) void NestedListModel::move(int from, int to, int n) { - if (n==1) { - _root->values.move(from,to); - } else { - QList<QVariant> replaced; - int i=0; - QVariantList::const_iterator it=_root->values.begin(); it += from+n; - for (; i<to-from; ++i,++it) - replaced.append(*it); - i=0; - it=_root->values.begin(); it += from; - for (; i<n; ++i,++it) - replaced.append(*it); - QVariantList::const_iterator f=replaced.begin(); - QVariantList::iterator t=_root->values.begin(); t += from; - for (; f != replaced.end(); ++f, ++t) - *t = *f; - } + if (!_root) + return; + qdeclarativelistmodel_move<QVariantList>(from, to, n, &_root->values); } bool NestedListModel::append(const QScriptValue& valuemap) { if (!_root) { - _root = new ModelNode; + _root = new ModelNode(this); m_ownsRoot = true; } - ModelNode *mn = new ModelNode; - mn->setObjectValue(valuemap); - _root->values << qVariantFromValue(mn); + + insert(count(), valuemap); return true; } @@ -1252,8 +1421,8 @@ QString NestedListModel::toString(int role) const } -ModelNode::ModelNode() -: modelCache(0), objectCache(0), isArray(false) +ModelNode::ModelNode(NestedListModel *model) +: modelCache(0), objectCache(0), isArray(false), m_model(model), listIndex(-1) { } @@ -1277,18 +1446,18 @@ void ModelNode::clear() properties.clear(); } -void ModelNode::setObjectValue(const QScriptValue& valuemap) { +void ModelNode::setObjectValue(const QScriptValue& valuemap, bool writeToCache) { QScriptValueIterator it(valuemap); while (it.hasNext()) { it.next(); - ModelNode *value = new ModelNode; + ModelNode *value = new ModelNode(m_model); QScriptValue v = it.value(); if (v.isArray()) { value->isArray = true; value->setListValue(v); } else { value->values << v.toVariant(); - if (objectCache) + if (writeToCache && objectCache) objectCache->setValue(it.name().toUtf8(), value->values.last()); } if (properties.contains(it.name())) @@ -1301,14 +1470,16 @@ void ModelNode::setListValue(const QScriptValue& valuelist) { values.clear(); int size = valuelist.property(QLatin1String("length")).toInt32(); for (int i=0; i<size; i++) { - ModelNode *value = new ModelNode; + ModelNode *value = new ModelNode(m_model); QScriptValue v = valuelist.property(i); if (v.isArray()) { value->isArray = true; value->setListValue(v); } else if (v.isObject()) { + value->listIndex = i; value->setObjectValue(v); } else { + value->listIndex = i; value->values << v.toVariant(); } values.append(qVariantFromValue(value)); @@ -1320,7 +1491,7 @@ void ModelNode::setProperty(const QString& prop, const QVariant& val) { if (it != properties.end()) { (*it)->values[0] = val; } else { - ModelNode *n = new ModelNode; + ModelNode *n = new ModelNode(m_model); n->values << val; properties.insert(prop,n); } @@ -1328,6 +1499,40 @@ void ModelNode::setProperty(const QString& prop, const QVariant& val) { objectCache->setValue(prop.toUtf8(), val); } +void ModelNode::updateListIndexes() +{ + for (QHash<QString, ModelNode *>::ConstIterator iter = properties.begin(); iter != properties.end(); ++iter) { + ModelNode *node = iter.value(); + if (node->isArray) { + for (int i=0; i<node->values.count(); ++i) { + ModelNode *subNode = qvariant_cast<ModelNode *>(node->values.at(i)); + if (subNode) + subNode->listIndex = i; + } + } + node->updateListIndexes(); + } +} + +/* + Need to call this to emit itemsChanged() for modifications outside of set() + and setProperty(), i.e. if an item returned from get() is modified +*/ +void ModelNode::changedProperty(const QString &name) const +{ + if (listIndex < 0) + return; + + m_model->checkRoles(); + QList<int> roles; + int role = m_model->roleStrings.indexOf(name); + if (role < 0) + roles = m_model->roles(); + else + roles << role; + emit m_model->m_listModel->itemsChanged(listIndex, 1, roles); +} + void ModelNode::dump(ModelNode *node, int ind) { QByteArray indentBa(ind * 4, ' '); @@ -1349,16 +1554,47 @@ void ModelNode::dump(ModelNode *node, int ind) } } -ModelObject::ModelObject() -: _mo(new QDeclarativeOpenMetaObject(this)) +ModelObject::ModelObject(ModelNode *node, NestedListModel *model, QScriptEngine *seng) + : m_model(model), + m_node(node), + m_meta(new ModelNodeMetaObject(seng, this)) { } void ModelObject::setValue(const QByteArray &name, const QVariant &val) { - _mo->setValue(name, val); + m_meta->setValue(name, val); setProperty(name.constData(), val); } +void ModelObject::setNodeUpdatesEnabled(bool enable) +{ + m_meta->m_enabled = enable; +} + + +ModelNodeMetaObject::ModelNodeMetaObject(QScriptEngine *seng, ModelObject *object) + : QDeclarativeOpenMetaObject(object), + m_enabled(false), + m_seng(seng), + m_obj(object) +{ +} + +void ModelNodeMetaObject::propertyWritten(int index) +{ + if (!m_enabled) + return; + + QString propName = QString::fromUtf8(name(index)); + QVariant value = operator[](index); + + QScriptValue sv = m_seng->newObject(); + sv.setProperty(propName, m_seng->newVariant(value)); + m_obj->m_node->setObjectValue(sv, false); + + m_obj->m_node->changedProperty(propName); +} + QT_END_NAMESPACE |