| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** This file is part of the QtQml module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #include "qqmlwatcher.h" |
| |
| #include "qqmlexpression.h" |
| #include "qqmlcontext.h" |
| #include "qqml.h" |
| |
| #include <private/qqmldebugservice_p.h> |
| #include <private/qqmlproperty_p.h> |
| #include <private/qqmlvaluetype_p.h> |
| |
| #include <QtCore/qmetaobject.h> |
| #include <QtCore/qdebug.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| class QQmlWatchProxy : public QObject |
| { |
| Q_OBJECT |
| public: |
| QQmlWatchProxy(int id, |
| QObject *object, |
| int debugId, |
| const QMetaProperty &prop, |
| QQmlWatcher *parent = nullptr); |
| |
| QQmlWatchProxy(int id, |
| QQmlExpression *exp, |
| int debugId, |
| QQmlWatcher *parent = nullptr); |
| |
| public slots: |
| void notifyValueChanged(); // Needs to be a slot because of QQmlPropertyPrivate::connect() |
| |
| private: |
| friend class QQmlWatcher; |
| int m_id; |
| QQmlWatcher *m_watch; |
| QObject *m_object; |
| int m_debugId; |
| QMetaProperty m_property; |
| |
| QQmlExpression *m_expr; |
| }; |
| |
| QQmlWatchProxy::QQmlWatchProxy(int id, |
| QQmlExpression *exp, |
| int debugId, |
| QQmlWatcher *parent) |
| : QObject(parent), m_id(id), m_watch(parent), m_object(nullptr), m_debugId(debugId), m_expr(exp) |
| { |
| QObject::connect(m_expr, &QQmlExpression::valueChanged, |
| this, &QQmlWatchProxy::notifyValueChanged); |
| } |
| |
| QQmlWatchProxy::QQmlWatchProxy(int id, |
| QObject *object, |
| int debugId, |
| const QMetaProperty &prop, |
| QQmlWatcher *parent) |
| : QObject(parent), m_id(id), m_watch(parent), m_object(object), m_debugId(debugId), m_property(prop), m_expr(nullptr) |
| { |
| static int refreshIdx = -1; |
| if(refreshIdx == -1) |
| refreshIdx = QQmlWatchProxy::staticMetaObject.indexOfMethod("notifyValueChanged()"); |
| |
| if (prop.hasNotifySignal()) |
| QQmlPropertyPrivate::connect(m_object, prop.notifySignalIndex(), this, refreshIdx); |
| } |
| |
| void QQmlWatchProxy::notifyValueChanged() |
| { |
| const QVariant v = m_expr ? m_expr->evaluate() : m_property.read(m_object); |
| emit m_watch->propertyChanged(m_id, m_debugId, m_property, v); |
| } |
| |
| |
| QQmlWatcher::QQmlWatcher(QObject *parent) |
| : QObject(parent) |
| { |
| } |
| |
| bool QQmlWatcher::addWatch(int id, quint32 debugId) |
| { |
| QObject *object = QQmlDebugService::objectForId(debugId); |
| if (object) { |
| int propCount = object->metaObject()->propertyCount(); |
| for (int ii=0; ii<propCount; ii++) |
| addPropertyWatch(id, object, debugId, object->metaObject()->property(ii)); |
| return true; |
| } |
| return false; |
| } |
| |
| bool QQmlWatcher::addWatch(int id, quint32 debugId, const QByteArray &property) |
| { |
| QObject *object = QQmlDebugService::objectForId(debugId); |
| if (object) { |
| int index = object->metaObject()->indexOfProperty(property.constData()); |
| if (index >= 0) { |
| addPropertyWatch(id, object, debugId, object->metaObject()->property(index)); |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| bool QQmlWatcher::addWatch(int id, quint32 objectId, const QString &expr) |
| { |
| QObject *object = QQmlDebugService::objectForId(objectId); |
| QQmlContext *context = qmlContext(object); |
| if (context) { |
| QQmlExpression *exprObj = new QQmlExpression(context, object, expr); |
| exprObj->setNotifyOnValueChanged(true); |
| QQmlWatchProxy *proxy = new QQmlWatchProxy(id, exprObj, objectId, this); |
| exprObj->setParent(proxy); |
| m_proxies[id].append(proxy); |
| proxy->notifyValueChanged(); |
| return true; |
| } |
| return false; |
| } |
| |
| bool QQmlWatcher::removeWatch(int id) |
| { |
| if (!m_proxies.contains(id)) |
| return false; |
| |
| QList<QPointer<QQmlWatchProxy> > proxies = m_proxies.take(id); |
| qDeleteAll(proxies); |
| return true; |
| } |
| |
| void QQmlWatcher::addPropertyWatch(int id, QObject *object, quint32 debugId, const QMetaProperty &property) |
| { |
| QQmlWatchProxy *proxy = new QQmlWatchProxy(id, object, debugId, property, this); |
| m_proxies[id].append(proxy); |
| |
| proxy->notifyValueChanged(); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include <qqmlwatcher.moc> |
| |
| #include "moc_qqmlwatcher.cpp" |