camerauis/cameraxui/cxengine/tsrc/unit/unittest_cxetestutils/cxedummystatemachine.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 14:51:30 +0300
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#include <QTimer>
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#include "cxedummystatemachine.h"
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#include "cxestate.h"
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/*!
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    \class CxeDummyStateMachine
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    \brief Dummy state machine for testing CxeTestUtils::waitForState()
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*/
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CxeDummyStateMachine::CxeDummyStateMachine() : CxeStateMachine("dummy state machine")
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{
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    qRegisterMetaType<CxeDummyStateMachine::State>();
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    addState(new CxeState(A, "A", B|C));
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    addState(new CxeState(B, "B", A|C));
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    addState(new CxeState(C, "C", A|B));
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    setInitialState(A);
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}
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CxeDummyStateMachine::~CxeDummyStateMachine()
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{
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    // no implementation needed here
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}
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CxeDummyStateMachine::State CxeDummyStateMachine::state() const
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{
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    return static_cast<State>(stateId());
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}
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void CxeDummyStateMachine::handleStateChanged(int /*newStateId*/, CxeError::Id error)
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{
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    emit stateChanged(state(), error);
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}
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/*!
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    Do an internal state change after a given delay. Multiple state changes
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    can be queued and they are executed in the same order delayedStateChange()
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    was called. The delay between queued state changes is determined by the
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    last delayedStateChange() call.
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    @param targetState Target state for transition (A, B, or C)
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    @param ms          Delay until state change (milliseconds)
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*/
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void CxeDummyStateMachine::delayedStateChange(State targetState, int ms)
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{
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    mTargetStateQueue.enqueue(targetState);
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    mDelay = ms;
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    QTimer::singleShot(ms, this, SLOT(timeout()));
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}
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void CxeDummyStateMachine::timeout()
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{
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    if (!mTargetStateQueue.isEmpty()) {
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        if (mDelay == 0) {
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            // No delay, instant changes
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            foreach(State s, mTargetStateQueue) {
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                setState(s);
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            }
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            mTargetStateQueue.clear();
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        } else {
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            // One state change at a time
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            setState(mTargetStateQueue.dequeue());
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        }
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    }
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    if (!mTargetStateQueue.isEmpty()) {
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        QTimer::singleShot(mDelay, this, SLOT(timeout()));
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    }
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}