src/quick/qtquick2.cpp

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
   4 ** Contact: http://www.qt-project.org/
   5 **
   6 ** This file is part of the QtQml module of the Qt Toolkit.
   7 **
   8 ** $QT_BEGIN_LICENSE:LGPL$
   9 ** GNU Lesser General Public License Usage
  10 ** This file may be used under the terms of the GNU Lesser General Public
  11 ** License version 2.1 as published by the Free Software Foundation and
  12 ** appearing in the file LICENSE.LGPL included in the packaging of this
  13 ** file. Please review the following information to ensure the GNU Lesser
  14 ** General Public License version 2.1 requirements will be met:
  15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  16 **
  17 ** In addition, as a special exception, Nokia gives you certain additional
  18 ** rights. These rights are described in the Nokia Qt LGPL Exception
  19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  20 **
  21 ** GNU General Public License Usage
  22 ** Alternatively, this file may be used under the terms of the GNU General
  23 ** Public License version 3.0 as published by the Free Software Foundation
  24 ** and appearing in the file LICENSE.GPL included in the packaging of this
  25 ** file. Please review the following information to ensure the GNU General
  26 ** Public License version 3.0 requirements will be met:
  27 ** http://www.gnu.org/copyleft/gpl.html.
  28 **
  29 ** Other Usage
  30 ** Alternatively, this file may be used in accordance with the terms and
  31 ** conditions contained in a signed written agreement between you and Nokia.
  32 **
  33 **
  34 **
  35 **
  36 **
  37 **
  38 ** $QT_END_LICENSE$
  39 **
  40 ****************************************************************************/
  41
  42 #include "qtquick2_p.h"
  43 #include <private/qqmlengine_p.h>
  44 #include <private/qquickutilmodule_p.h>
  45 #include <private/qquickvaluetypes_p.h>
  46 #include <private/qquickitemsmodule_p.h>
  47 #include <private/qquickparticlesmodule_p.h>
  48 #include <private/qquickwindowmodule_p.h>
  49 #include <private/qquickapplication_p.h>
  50
  51 #include <private/qqmlenginedebugservice_p.h>
  52 #include <private/qqmldebugstatesdelegate_p.h>
  53 #include <private/qqmlbinding_p.h>
  54 #include <private/qqmlcontext_p.h>
  55 #include <QtQuick/private/qquickpropertychanges_p.h>
  56 #include <QtQuick/private/qquickstate_p.h>
  57 #include <qqmlproperty.h>
  58 #include <QtCore/QWeakPointer>
  59
  60 QT_BEGIN_NAMESPACE
  61
  62 class QQmlQtQuick2DebugStatesDelegate : public QQmlDebugStatesDelegate
  63 {
  64 public:
  65     QQmlQtQuick2DebugStatesDelegate();
  66     virtual ~QQmlQtQuick2DebugStatesDelegate();
  67     virtual void buildStatesList(bool cleanList, const QList<QPointer<QObject> > &instances);
  68     virtual void updateBinding(QQmlContext *context,
  69                                const QQmlProperty &property,
  70                                const QVariant &expression, bool isLiteralValue,
  71                                const QString &fileName, int line, int column,
  72                                bool *isBaseState);
  73     virtual bool setBindingForInvalidProperty(QObject *object,
  74                                               const QString &propertyName,
  75                                               const QVariant &expression,
  76                                               bool isLiteralValue);
  77     virtual void resetBindingForInvalidProperty(QObject *object,
  78                                                 const QString &propertyName);
  79
  80 private:
  81     void buildStatesList(QObject *obj);
  82
  83     QList<QWeakPointer<QQuickState> > m_allStates;
  84 };
  85
  86 QQmlQtQuick2DebugStatesDelegate::QQmlQtQuick2DebugStatesDelegate()
  87 {
  88 }
  89
  90 QQmlQtQuick2DebugStatesDelegate::~QQmlQtQuick2DebugStatesDelegate()
  91 {
  92 }
  93
  94 void QQmlQtQuick2DebugStatesDelegate::buildStatesList(bool cleanList,
  95                                                       const QList<QPointer<QObject> > &instances)
  96 {
  97     if (cleanList)
  98         m_allStates.clear();
  99
 100     //only root context has all instances
 101     for (int ii = 0; ii < instances.count(); ++ii) {
 102         buildStatesList(instances.at(ii));
 103     }
 104 }
 105
 106 void QQmlQtQuick2DebugStatesDelegate::buildStatesList(QObject *obj)
 107 {
 108     if (QQuickState *state = qobject_cast<QQuickState *>(obj)) {
 109         m_allStates.append(state);
 110     }
 111
 112     QObjectList children = obj->children();
 113     for (int ii = 0; ii < children.count(); ++ii) {
 114         buildStatesList(children.at(ii));
 115     }
 116 }
 117
 118 void QQmlQtQuick2DebugStatesDelegate::updateBinding(QQmlContext *context,
 119                                                             const QQmlProperty &property,
 120                                                             const QVariant &expression, bool isLiteralValue,
 121                                                             const QString &fileName, int line, int column,
 122                                                             bool *inBaseState)
 123 {
 124     QObject *object = property.object();
 125     QString propertyName = property.name();
 126     foreach (QWeakPointer<QQuickState> statePointer, m_allStates) {
 127         if (QQuickState *state = statePointer.data()) {
 128             // here we assume that the revert list on itself defines the base state
 129             if (state->isStateActive() && state->containsPropertyInRevertList(object, propertyName)) {
 130                 *inBaseState = false;
 131
 132                 QQmlBinding *newBinding = 0;
 133                 if (!isLiteralValue) {
 134                     newBinding = new QQmlBinding(expression.toString(), false, object,
 135                                                  QQmlContextData::get(context), fileName,
 136                                                  line, column);
 137                     newBinding->setTarget(property);
 138                     newBinding->setNotifyOnValueChanged(true);
 139                 }
 140
 141                 state->changeBindingInRevertList(object, propertyName, newBinding);
 142
 143                 if (isLiteralValue)
 144                     state->changeValueInRevertList(object, propertyName, expression);
 145             }
 146         }
 147     }
 148 }
 149
 150 bool QQmlQtQuick2DebugStatesDelegate::setBindingForInvalidProperty(QObject *object,
 151                                                                            const QString &propertyName,
 152                                                                            const QVariant &expression,
 153                                                                            bool isLiteralValue)
 154 {
 155     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 156         if (isLiteralValue)
 157             propertyChanges->changeValue(propertyName, expression);
 158         else
 159             propertyChanges->changeExpression(propertyName, expression.toString());
 160         return true;
 161     } else {
 162         return false;
 163     }
 164 }
 165
 166 void QQmlQtQuick2DebugStatesDelegate::resetBindingForInvalidProperty(QObject *object, const QString &propertyName)
 167 {
 168     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 169         propertyChanges->removeProperty(propertyName);
 170     }
 171 }
 172
 173
 174 void QQmlQtQuick2Module::defineModule()
 175 {
 176     QQuickUtilModule::defineModule();
 177     QQmlEnginePrivate::defineModule();
 178     QQuickItemsModule::defineModule();
 179     QQuickParticlesModule::defineModule();
 180     QQuickWindowModule::defineModule();
 181
 182     qmlRegisterUncreatableType<QQuickApplication>("QtQuick",2,0,"Application", QQuickApplication::tr("Application is an abstract class"));
 183
 184     QQuickValueTypes::registerValueTypes();
 185
 186     if (QQmlEngineDebugService::isDebuggingEnabled()) {
 187         QQmlEngineDebugService::instance()->setStatesDelegate(
 188                     new QQmlQtQuick2DebugStatesDelegate);
 189     }
 190 }
 191
 192 QT_END_NAMESPACE
 193