qabstracttransition.cpp

Go to the documentation of this file.

/****************************************************************************
**
** Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtCore 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.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qabstracttransition.h"

#ifndef QT_NO_STATEMACHINE

#include "qabstracttransition_p.h"
#include "qabstractstate.h"
#include "qstate.h"
#include "qstatemachine.h"

QT_BEGIN_NAMESPACE

QAbstractTransitionPrivate::QAbstractTransitionPrivate()
{
}

QAbstractTransitionPrivate *QAbstractTransitionPrivate::get(QAbstractTransition *q)
{
    return q->d_func();
}

QStateMachine *QAbstractTransitionPrivate::machine() const
{
    QState *source = sourceState();
    if (!source)
        return 0;
    return source->machine();
}

bool QAbstractTransitionPrivate::callEventTest(QEvent *e)
{
    Q_Q(QAbstractTransition);
    return q->eventTest(e);
}

void QAbstractTransitionPrivate::callOnTransition(QEvent *e)
{
    Q_Q(QAbstractTransition);
    q->onTransition(e);
}

QState *QAbstractTransitionPrivate::sourceState() const
{
    return qobject_cast<QState*>(parent);
}

void QAbstractTransitionPrivate::emitTriggered()
{
    Q_Q(QAbstractTransition);
    emit q->triggered();
}

QAbstractTransition::QAbstractTransition(QState *sourceState)
    : QObject(*new QAbstractTransitionPrivate, sourceState)
{
}

QAbstractTransition::QAbstractTransition(QAbstractTransitionPrivate &dd,
                                         QState *parent)
    : QObject(dd, parent)
{
}

QAbstractTransition::~QAbstractTransition()
{
}

QState *QAbstractTransition::sourceState() const
{
    Q_D(const QAbstractTransition);
    return d->sourceState();
}

QAbstractState *QAbstractTransition::targetState() const
{
    Q_D(const QAbstractTransition);
    if (d->targetStates.isEmpty())
        return 0;
    return d->targetStates.first().data();
}

void QAbstractTransition::setTargetState(QAbstractState* target)
{
    Q_D(QAbstractTransition);
    if (!target)
        d->targetStates.clear();
    else
        setTargetStates(QList<QAbstractState*>() << target);
}

QList<QAbstractState*> QAbstractTransition::targetStates() const
{
    Q_D(const QAbstractTransition);
    QList<QAbstractState*> result;
    for (int i = 0; i < d->targetStates.size(); ++i) {
        QAbstractState *target = d->targetStates.at(i).data();
        if (target)
            result.append(target);
    }
    return result;
}

void QAbstractTransition::setTargetStates(const QList<QAbstractState*> &targets)
{
    Q_D(QAbstractTransition);

    for (int i = 0; i < targets.size(); ++i) {
        QAbstractState *target = targets.at(i);
        if (!target) {
            qWarning("QAbstractTransition::setTargetStates: target state(s) cannot be null");
            return;
        }
    }

    d->targetStates.clear();
    for (int i = 0; i < targets.size(); ++i)
        d->targetStates.append(targets.at(i));
}

QStateMachine *QAbstractTransition::machine() const
{
    Q_D(const QAbstractTransition);
    return d->machine();
}

#ifndef QT_NO_ANIMATION

void QAbstractTransition::addAnimation(QAbstractAnimation *animation)
{
    Q_D(QAbstractTransition);
    if (!animation) {
        qWarning("QAbstractTransition::addAnimation: cannot add null animation");
        return;
    }
    d->animations.append(animation);
}

void QAbstractTransition::removeAnimation(QAbstractAnimation *animation)
{
    Q_D(QAbstractTransition);
    if (!animation) {
        qWarning("QAbstractTransition::removeAnimation: cannot remove null animation");
        return;
    }
    d->animations.removeOne(animation);
}

QList<QAbstractAnimation*> QAbstractTransition::animations() const
{
    Q_D(const QAbstractTransition);
    return d->animations;
}

#endif

bool QAbstractTransition::event(QEvent *e)
{
    return QObject::event(e);
}

QT_END_NAMESPACE

#endif //QT_NO_STATEMACHINE