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
  48 #include <private/qqmlenginedebugservice_p.h>
  49 #include <private/qqmldebugstatesdelegate_p.h>
  50 #include <private/qqmlbinding_p.h>
  51 #include <private/qqmlcontext_p.h>
  52 #include <private/qquickapplication_p.h>
  53 #include <QtQuick/private/qquickpropertychanges_p.h>
  54 #include <QtQuick/private/qquickstate_p.h>
  55 #include <qqmlproperty.h>
  56 #include <QtCore/QWeakPointer>
  57
  58 QT_BEGIN_NAMESPACE
  59
  60 class QQmlQtQuick2DebugStatesDelegate : public QQmlDebugStatesDelegate
  61 {
  62 public:
  63     QQmlQtQuick2DebugStatesDelegate();
  64     virtual ~QQmlQtQuick2DebugStatesDelegate();
  65     virtual void buildStatesList(bool cleanList, const QList<QPointer<QObject> > &instances);
  66     virtual void updateBinding(QQmlContext *context,
  67                                const QQmlProperty &property,
  68                                const QVariant &expression, bool isLiteralValue,
  69                                const QString &fileName, int line, int column,
  70                                bool *isBaseState);
  71     virtual bool setBindingForInvalidProperty(QObject *object,
  72                                               const QString &propertyName,
  73                                               const QVariant &expression,
  74                                               bool isLiteralValue);
  75     virtual void resetBindingForInvalidProperty(QObject *object,
  76                                                 const QString &propertyName);
  77
  78 private:
  79     void buildStatesList(QObject *obj);
  80
  81     QList<QWeakPointer<QQuickState> > m_allStates;
  82 };
  83
  84 QQmlQtQuick2DebugStatesDelegate::QQmlQtQuick2DebugStatesDelegate()
  85 {
  86 }
  87
  88 QQmlQtQuick2DebugStatesDelegate::~QQmlQtQuick2DebugStatesDelegate()
  89 {
  90 }
  91
  92 void QQmlQtQuick2DebugStatesDelegate::buildStatesList(bool cleanList,
  93                                                       const QList<QPointer<QObject> > &instances)
  94 {
  95     if (cleanList)
  96         m_allStates.clear();
  97
  98     //only root context has all instances
  99     for (int ii = 0; ii < instances.count(); ++ii) {
 100         buildStatesList(instances.at(ii));
 101     }
 102 }
 103
 104 void QQmlQtQuick2DebugStatesDelegate::buildStatesList(QObject *obj)
 105 {
 106     if (QQuickState *state = qobject_cast<QQuickState *>(obj)) {
 107         m_allStates.append(state);
 108     }
 109
 110     QObjectList children = obj->children();
 111     for (int ii = 0; ii < children.count(); ++ii) {
 112         buildStatesList(children.at(ii));
 113     }
 114 }
 115
 116 void QQmlQtQuick2DebugStatesDelegate::updateBinding(QQmlContext *context,
 117                                                             const QQmlProperty &property,
 118                                                             const QVariant &expression, bool isLiteralValue,
 119                                                             const QString &fileName, int line, int column,
 120                                                             bool *inBaseState)
 121 {
 122     QObject *object = property.object();
 123     QString propertyName = property.name();
 124     foreach (QWeakPointer<QQuickState> statePointer, m_allStates) {
 125         if (QQuickState *state = statePointer.data()) {
 126             // here we assume that the revert list on itself defines the base state
 127             if (state->isStateActive() && state->containsPropertyInRevertList(object, propertyName)) {
 128                 *inBaseState = false;
 129
 130                 QQmlBinding *newBinding = 0;
 131                 if (!isLiteralValue) {
 132                     newBinding = new QQmlBinding(expression.toString(), false, object,
 133                                                  QQmlContextData::get(context), fileName,
 134                                                  line, column);
 135                     newBinding->setTarget(property);
 136                     newBinding->setNotifyOnValueChanged(true);
 137                 }
 138
 139                 state->changeBindingInRevertList(object, propertyName, newBinding);
 140
 141                 if (isLiteralValue)
 142                     state->changeValueInRevertList(object, propertyName, expression);
 143             }
 144         }
 145     }
 146 }
 147
 148 bool QQmlQtQuick2DebugStatesDelegate::setBindingForInvalidProperty(QObject *object,
 149                                                                            const QString &propertyName,
 150                                                                            const QVariant &expression,
 151                                                                            bool isLiteralValue)
 152 {
 153     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 154         if (isLiteralValue)
 155             propertyChanges->changeValue(propertyName, expression);
 156         else
 157             propertyChanges->changeExpression(propertyName, expression.toString());
 158         return true;
 159     } else {
 160         return false;
 161     }
 162 }
 163
 164 void QQmlQtQuick2DebugStatesDelegate::resetBindingForInvalidProperty(QObject *object, const QString &propertyName)
 165 {
 166     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 167         propertyChanges->removeProperty(propertyName);
 168     }
 169 }
 170
 171
 172 void QQmlQtQuick2Module::defineModule()
 173 {
 174     QQuickUtilModule::defineModule();
 175     QQmlEnginePrivate::defineModule();
 176     QQuickItemsModule::defineModule();
 177
 178     qmlRegisterUncreatableType<QQuickApplication>("QtQuick",2,0,"Application", QQuickApplication::tr("Application is an abstract class"));
 179
 180     QQuickValueTypes::registerValueTypes();
 181
 182     if (QQmlEngineDebugService::isDebuggingEnabled()) {
 183         QQmlEngineDebugService::instance()->setStatesDelegate(
 184                     new QQmlQtQuick2DebugStatesDelegate);
 185     }
 186 }
 187
 188 QT_END_NAMESPACE
 189