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/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/QPointer>
  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<QPointer<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     typedef QPointer<QQuickState> QuickStatePointer;
 123     QObject *object = property.object();
 124     QString propertyName = property.name();
 125     foreach (const QuickStatePointer& statePointer, m_allStates) {
 126         if (QQuickState *state = statePointer.data()) {
 127             // here we assume that the revert list on itself defines the base state
 128             if (state->isStateActive() && state->containsPropertyInRevertList(object, propertyName)) {
 129                 *inBaseState = false;
 130
 131                 QQmlBinding *newBinding = 0;
 132                 if (!isLiteralValue) {
 133                     newBinding = new QQmlBinding(expression.toString(), false, object,
 134                                                  QQmlContextData::get(context), fileName,
 135                                                  line, column);
 136                     newBinding->setTarget(property);
 137                     newBinding->setNotifyOnValueChanged(true);
 138                 }
 139
 140                 state->changeBindingInRevertList(object, propertyName, newBinding);
 141
 142                 if (isLiteralValue)
 143                     state->changeValueInRevertList(object, propertyName, expression);
 144             }
 145         }
 146     }
 147 }
 148
 149 bool QQmlQtQuick2DebugStatesDelegate::setBindingForInvalidProperty(QObject *object,
 150                                                                            const QString &propertyName,
 151                                                                            const QVariant &expression,
 152                                                                            bool isLiteralValue)
 153 {
 154     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 155         if (isLiteralValue)
 156             propertyChanges->changeValue(propertyName, expression);
 157         else
 158             propertyChanges->changeExpression(propertyName, expression.toString());
 159         return true;
 160     } else {
 161         return false;
 162     }
 163 }
 164
 165 void QQmlQtQuick2DebugStatesDelegate::resetBindingForInvalidProperty(QObject *object, const QString &propertyName)
 166 {
 167     if (QQuickPropertyChanges *propertyChanges = qobject_cast<QQuickPropertyChanges *>(object)) {
 168         propertyChanges->removeProperty(propertyName);
 169     }
 170 }
 171
 172
 173 void QQmlQtQuick2Module::defineModule()
 174 {
 175     QQuickUtilModule::defineModule();
 176     QQmlEnginePrivate::defineQtQuick2Module();
 177     QQuickItemsModule::defineModule();
 178
 179     qmlRegisterUncreatableType<QQuickApplication>("QtQuick",2,0,"Application", QQuickApplication::tr("Application is an abstract class"));
 180
 181     QQuickValueTypes::registerValueTypes();
 182
 183     if (QQmlEngineDebugService::isDebuggingEnabled()) {
 184         QQmlEngineDebugService::instance()->setStatesDelegate(
 185                     new QQmlQtQuick2DebugStatesDelegate);
 186     }
 187 }
 188
 189 QT_END_NAMESPACE
 190