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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtQml module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QQUICKSTATE_H
#define QQUICKSTATE_H
#include <qqml.h>
#include <qqmlproperty.h>
#include <QtCore/qobject.h>
#include <QtCore/qsharedpointer.h>
#include <private/qtquickglobal_p.h>
QT_BEGIN_HEADER
QT_BEGIN_NAMESPACE
class QQuickActionEvent;
class QQmlAbstractBinding;
class QQmlBinding;
class QQmlExpression;
class QQuickAction
{
public:
QQuickAction();
QQuickAction(QObject *, const QString &, const QVariant &);
QQuickAction(QObject *, const QString &,
QQmlContext *, const QVariant &);
bool restore:1;
bool actionDone:1;
bool reverseEvent:1;
bool deletableToBinding:1;
QQmlProperty property;
QVariant fromValue;
QVariant toValue;
QQmlAbstractBinding *fromBinding;
QWeakPointer<QQmlAbstractBinding> toBinding;
QQuickActionEvent *event;
//strictly for matching
QObject *specifiedObject;
QString specifiedProperty;
void deleteFromBinding();
};
class Q_AUTOTEST_EXPORT QQuickActionEvent
{
public:
virtual ~QQuickActionEvent();
enum EventType { Script, SignalHandler, ParentChange, AnchorChanges };
enum Reason { ActualChange, FastForward };
virtual EventType type() const = 0;
virtual void execute(Reason reason = ActualChange);
virtual bool isReversable();
virtual void reverse(Reason reason = ActualChange);
virtual void saveOriginals() {}
virtual bool needsCopy() { return false; }
virtual void copyOriginals(QQuickActionEvent *) {}
virtual bool isRewindable() { return isReversable(); }
virtual void rewind() {}
virtual void saveCurrentValues() {}
virtual void saveTargetValues() {}
virtual bool changesBindings();
virtual void clearBindings();
virtual bool override(QQuickActionEvent*other);
};
//### rename to QQuickStateChange?
class QQuickStateGroup;
class QQuickState;
class QQuickStateOperationPrivate;
class Q_QUICK_PRIVATE_EXPORT QQuickStateOperation : public QObject
{
Q_OBJECT
public:
QQuickStateOperation(QObject *parent = 0)
: QObject(parent) {}
typedef QList<QQuickAction> ActionList;
virtual ActionList actions();
QQuickState *state() const;
void setState(QQuickState *state);
protected:
QQuickStateOperation(QObjectPrivate &dd, QObject *parent = 0);
private:
Q_DECLARE_PRIVATE(QQuickStateOperation)
Q_DISABLE_COPY(QQuickStateOperation)
};
typedef QQuickStateOperation::ActionList QQuickStateActions;
class QQuickTransition;
class QQuickStatePrivate;
class Q_QUICK_PRIVATE_EXPORT QQuickState : public QObject
{
Q_OBJECT
Q_PROPERTY(QString name READ name WRITE setName)
Q_PROPERTY(QQmlBinding *when READ when WRITE setWhen)
Q_PROPERTY(QString extend READ extends WRITE setExtends)
Q_PROPERTY(QQmlListProperty<QQuickStateOperation> changes READ changes)
Q_CLASSINFO("DefaultProperty", "changes")
Q_CLASSINFO("DeferredPropertyNames", "changes")
public:
QQuickState(QObject *parent=0);
virtual ~QQuickState();
QString name() const;
void setName(const QString &);
bool isNamed() const;
/*'when' is a QQmlBinding to limit state changes oscillation
due to the unpredictable order of evaluation of bound expressions*/
bool isWhenKnown() const;
QQmlBinding *when() const;
void setWhen(QQmlBinding *);
QString extends() const;
void setExtends(const QString &);
QQmlListProperty<QQuickStateOperation> changes();
int operationCount() const;
QQuickStateOperation *operationAt(int) const;
QQuickState &operator<<(QQuickStateOperation *);
void apply(QQuickTransition *, QQuickState *revert);
void cancel();
QQuickStateGroup *stateGroup() const;
void setStateGroup(QQuickStateGroup *);
bool containsPropertyInRevertList(QObject *target, const QString &name) const;
bool changeValueInRevertList(QObject *target, const QString &name, const QVariant &revertValue);
bool changeBindingInRevertList(QObject *target, const QString &name, QQmlAbstractBinding *binding);
bool removeEntryFromRevertList(QObject *target, const QString &name);
void addEntryToRevertList(const QQuickAction &action);
void removeAllEntriesFromRevertList(QObject *target);
void addEntriesToRevertList(const QList<QQuickAction> &actions);
QVariant valueInRevertList(QObject *target, const QString &name) const;
QQmlAbstractBinding *bindingInRevertList(QObject *target, const QString &name) const;
bool isStateActive() const;
Q_SIGNALS:
void completed();
private:
Q_DECLARE_PRIVATE(QQuickState)
Q_DISABLE_COPY(QQuickState)
};
QT_END_NAMESPACE
QML_DECLARE_TYPE(QQuickStateOperation)
QML_DECLARE_TYPE(QQuickState)
QT_END_HEADER
#endif // QQUICKSTATE_H
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