src/quick/qtquick2.cpp

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  41
  42 #include "qtquick2_p.h"
  43 #include <private/qqmlengine_p.h>
  44 #include <private/qquickutilmodule_p.h>
  45 #include <private/qqmlvaluetype_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 <QtQuick/private/qquickpropertychanges_p.h>
  53 #include <QtQuick/private/qquickstate_p.h>
  54 #include <qqmlproperty.h>
  55 #include <QtCore/QWeakPointer>
  56
  57 QT_BEGIN_NAMESPACE
  58
  59 class QQmlQtQuick2DebugStatesDelegate : public QQmlDebugStatesDelegate
  60 {
  61 public:
  62     QQmlQtQuick2DebugStatesDelegate();
  63     virtual ~QQmlQtQuick2DebugStatesDelegate();
  64     virtual void buildStatesList(bool cleanList, const QList<QPointer<QObject> > &instances);
  65     virtual void updateBinding(QQmlContext *context,
  66                                const QQmlProperty &property,
  67                                const QVariant &expression, bool isLiteralValue,
  68                                const QString &fileName, int line, int column,
  69                                bool *isBaseState);
  70     virtual bool setBindingForInvalidProperty(QObject *object,
  71                                               const QString &propertyName,
  72                                               const QVariant &expression,
  73                                               bool isLiteralValue);
  74     virtual void resetBindingForInvalidProperty(QObject *object,
  75                                                 const QString &propertyName);
  76
  77 private:
  78     void buildStatesList(QObject *obj);
  79
  80     QList<QWeakPointer<QQuickState> > m_allStates;
  81 };
  82
  83 QQmlQtQuick2DebugStatesDelegate::QQmlQtQuick2DebugStatesDelegate()
  84 {
  85 }
  86
  87 QQmlQtQuick2DebugStatesDelegate::~QQmlQtQuick2DebugStatesDelegate()
  88 {
  89 }
  90
  91 void QQmlQtQuick2DebugStatesDelegate::buildStatesList(bool cleanList,
  92                                                       const QList<QPointer<QObject> > &instances)
  93 {
  94     if (cleanList)
  95         m_allStates.clear();
  96
  97     //only root context has all instances
  98     for (int ii = 0; ii < instances.count(); ++ii) {
  99         buildStatesList(instances.at(ii));
 100     }
 101 }
 102
 103 void QQmlQtQuick2DebugStatesDelegate::buildStatesList(QObject *obj)
 104 {
 105     if (QQuickState *state = qobject_cast<QQuickState *>(obj)) {
 106         m_allStates.append(state);
 107     }
 108
 109     QObjectList children = obj->children();
 110     for (int ii = 0; ii < children.count(); ++ii) {
 111         buildStatesList(children.at(ii));
 112     }
 113 }
 114
 115 void QQmlQtQuick2DebugStatesDelegate::updateBinding(QQmlContext *context,
 116                                                             const QQmlProperty &property,
 117                                                             const QVariant &expression, bool isLiteralValue,
 118                                                             const QString &fileName, int line, int column,
 119                                                             bool *inBaseState)
 120 {
 121     QObject *object = property.object();
 122     QString propertyName = property.name();
 123     foreach (QWeakPointer<QQuickState> statePointer, m_allStates) {
 124         if (QQuickState *state = statePointer.data()) {
 125             // here we assume that the revert list on itself defines the base state
 126             if (state->isStateActive() && state->containsPropertyInRevertList(object, propertyName)) {
 127                 *inBaseState = false;
 128
 129                 QQmlBinding *newBinding = 0;
 130                 if (!isLiteralValue) {
 131                     newBinding = new QQmlBinding(expression.toString(), false, object,
 132                                                  QQmlContextData::get(context), fileName,
 133                                                  line, column);
 134                     newBinding->setTarget(property);
 135                     newBinding->setNotifyOnValueChanged(true);
 136                 }
 137
 138                 state->changeBindingInRevertList(object, propertyName, newBinding);
 139
 140                 if (isLiteralValue)
 141                     state->changeValueInRevertList(object, propertyName, expression);
 142             }
 143         }
 144     }
 145 }
 146
 147 bool QQmlQtQuick2DebugStatesDelegate::setBindingForInvalidProperty(QObject *object,
 148                                                                            const QString &propertyName,
 149                                                                            const QVariant &expression,
 150                                                                            bool isLiteralValue)
 151 {
 152     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 153         if (isLiteralValue)
 154             propertyChanges->changeValue(propertyName, expression);
 155         else
 156             propertyChanges->changeExpression(propertyName, expression.toString());
 157         return true;
 158     } else {
 159         return false;
 160     }
 161 }
 162
 163 void QQmlQtQuick2DebugStatesDelegate::resetBindingForInvalidProperty(QObject *object, const QString &propertyName)
 164 {
 165     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 166         propertyChanges->removeProperty(propertyName);
 167     }
 168 }
 169
 170
 171 void QQmlQtQuick2Module::defineModule()
 172 {
 173     QQuickUtilModule::defineModule();
 174     QQmlEnginePrivate::defineModule();
 175     QQuickItemsModule::defineModule();
 176     QQmlValueTypeFactory::registerValueTypes();
 177
 178     if (QQmlEngineDebugService::isDebuggingEnabled()) {
 179         QQmlEngineDebugService::instance()->setStatesDelegate(
 180                     new QQmlQtQuick2DebugStatesDelegate);
 181     }
 182 }
 183
 184 QT_END_NAMESPACE
 185