camerauis/cameraxui/cxui/src/cxuiselftimer.cpp
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 11 Jun 2010 13:26:48 +0300
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permissions -rw-r--r--
Revision: 201021 Kit: 2010123
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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 <QGraphicsWidget>
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#include <hblabel.h>
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#include <hbpushbutton.h>
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#include "cxuiselftimer.h"
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#include "cxutils.h"
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#include "cxuienums.h"
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#include "cxuidocumentloader.h"
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#include "cxesettings.h"
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#include "cxenamespace.h" // CxeSettingIds
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#include "cxeerror.h"
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using namespace CxUiLayout;
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/*!
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    \class CxuiSelfTimer
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    \brief Class for handling selftimer countdown.
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    CxuiSelfTimer class handles the selftimer countdown and updates widgets
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    accordingly.
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*/
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// constants
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const int CONTINUOUS_POSTCAPTURE    = -1;
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const int UNKNOWN                   = -99;
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const static QString SELFTIMER_SOUND = "z:\\system\\sounds\\digital\\selftimer.wav";
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CxuiSelfTimer::CxuiSelfTimer(CxeSettings &settings)
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:  mDelay(-1),
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   mCounter(0),
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   mTimer(this),
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   mOldPostCaptureTimeOut(UNKNOWN),
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   mWidgetContainer(NULL),
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   mTimerLabel(NULL),
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   mCancelButton(NULL),
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   mStartButton(NULL),
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   mSettings(settings),
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   mSound(SELFTIMER_SOUND)
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{
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    CX_DEBUG_ENTER_FUNCTION();
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    connect(&mTimer, SIGNAL(timeout()), this, SLOT(timeout()));
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    mTimer.setSingleShot(false);
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    CX_DEBUG_EXIT_FUNCTION();
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}
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CxuiSelfTimer::~CxuiSelfTimer()
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{
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    CX_DEBUG_IN_FUNCTION();
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}
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/*!
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    Get pointers to the UI widgets from the documentloader.
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    \param documentLoader Pointer to a CxuiDocumentLoader instance that has
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    loaded the docml containing selftimer widgets.
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 */
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void CxuiSelfTimer::loadSelftimerWidgets(CxuiDocumentLoader *documentLoader) {
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    if (documentLoader) {
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        QGraphicsWidget *widget = NULL;
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        widget = documentLoader->findWidget(STILL_PRE_CAPTURE_SELFTIMER_CONTAINER);
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        mWidgetContainer = qobject_cast<HbWidget *>(widget);
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        CX_DEBUG_ASSERT(mWidgetContainer);
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        widget = documentLoader->findWidget(STILL_PRE_CAPTURE_SELFTIMER_COUNTER);
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        mTimerLabel = qobject_cast<HbLabel *>(widget);
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        CX_DEBUG_ASSERT(mTimerLabel);
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        widget = documentLoader->findWidget(STILL_PRE_CAPTURE_SELFTIMER_CANCEL_BUTTON);
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        mCancelButton = qobject_cast<HbPushButton *>(widget);
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        CX_DEBUG_ASSERT(mCancelButton);
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        widget = documentLoader->findWidget(STILL_PRE_CAPTURE_SELFTIMER_START_BUTTON);
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        mStartButton = qobject_cast<HbPushButton *>(widget);
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        CX_DEBUG_ASSERT(mStartButton);
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        connect(mCancelButton, SIGNAL(released()), this, SLOT(cancel()));
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        connect(mStartButton, SIGNAL(released()), this, SLOT(startTimer()));
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        updateWidgets();
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    }
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}
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/*!
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    Method for checking if selftimer is enabled.
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    Selftimer is enabled/disabled using slots cancel() and changeTimeout()
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    \return True if selftimer is enabled
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    \sa changeTimeOut(int seconds)
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    \sa cancel()
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 */
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bool CxuiSelfTimer::isEnabled()
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{
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    return (mDelay >= 0);
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}
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   118
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/*!
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    Method for checking if selftimer countdown is ongoing.
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    Countdown is started with by calling startTimer().
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    \return True if selftimer is active.
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   123
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    \sa startTimer()
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 */
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bool CxuiSelfTimer::isOngoing()
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{
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    return mTimer.isActive();
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}
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   130
32
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/*!
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   Returns current timeout value of selftimer.
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 */
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int CxuiSelfTimer::getTimeout() const
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{
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    return mDelay;
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}
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   138
19
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/*! Slot for canceling the selftimer.
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    Disables selftimer, sets back the postcapturetimeout if it
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    has been changed by selftimer and emits signal to notify interested
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    parties that cancel has been called.
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   143
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    \sa startTimer()
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 */
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void CxuiSelfTimer::cancel()
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{
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    CX_DEBUG_ENTER_FUNCTION();
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   149
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    // show postcapture setting is changed when selftimer is started
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    // if it has been changed, then change it back
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    if (mOldPostCaptureTimeOut != UNKNOWN) {
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        mSettings.set(CxeSettingIds::STILL_SHOWCAPTURED, mOldPostCaptureTimeOut);
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        mOldPostCaptureTimeOut = UNKNOWN;
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    }
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   156
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    // Reset counter and stop any ongoing action.
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    // Start button back to enabled.
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    reset(false);
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    // Disable self timer
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    mDelay = -1;
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   162
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    // Update UI components.
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    updateWidgets();
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   165
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    // Signal others about cancellation.
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    emit cancelled();
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   168
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    CX_DEBUG_EXIT_FUNCTION();
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}
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/*!
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    Slot for handling timer timouts. Counter will be updated and when
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    selftimer countdown is finished, timerFinished() signal is emitted.
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 */
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void CxuiSelfTimer::timeout()
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{
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    CX_DEBUG_ENTER_FUNCTION();
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    // Update seconds passed.
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    ++mCounter;
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   182
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    // Update now to have better looking user experience,
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    // especially when counter elapses: "0" is updated before emitting event,
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    // so the UI seems to update smoother.
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    updateWidgets();
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   187
29
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    playSound();
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   189
19
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    // Check if timer ran out
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    if (mCounter >= mDelay) {
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        mTimer.stop();
29
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        mSound.stop();
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        hideWidgets();
19
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        emit timerFinished();
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   196
    }
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   197
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    CX_DEBUG_EXIT_FUNCTION();
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   199
}
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   200
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   201
/*!
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 * Play selftimer sound.
19
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 */
29
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void CxuiSelfTimer::playSound()
19
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{
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    CX_DEBUG_ENTER_FUNCTION();
29
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   207
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    int timeLeft = mDelay - mCounter;
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   209
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    if (timeLeft <= 3) {
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        // play as fast as we can
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   212
        if (mSound.isFinished()) {
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            mSound.setLoops(-1);
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            mSound.play();
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   215
        }
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   216
    } else if (timeLeft <= 10) {
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        // play every second
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        mSound.setLoops(1);
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        mSound.play();
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   220
    } else {
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        // play once every two seconds
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   222
        if (mCounter%2) {
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            mSound.setLoops(1);
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            mSound.play();
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   225
        }
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   226
    }
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diff changeset
   227
19
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    CX_DEBUG_EXIT_FUNCTION();
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}
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   230
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/*!
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     Slot for starting the countdown. Show postcapture setting is set to
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     continuous and previous value stored. Timer is started.
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     \sa cancel()
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 */
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void CxuiSelfTimer::startTimer()
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{
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    CX_DEBUG_ENTER_FUNCTION();
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    // get the current postcapture timeout
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    CxeError::Id error = mSettings.get(CxeSettingIds::STILL_SHOWCAPTURED, mOldPostCaptureTimeOut);
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    if (error == CxeError::None) {
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        // set continuous postcapture (view is visible until dismissed)
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        mSettings.set(CxeSettingIds::STILL_SHOWCAPTURED, CONTINUOUS_POSTCAPTURE);
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    } else {
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        // if there was an error, don't modify the postcapture setting
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        mOldPostCaptureTimeOut = UNKNOWN;
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    }
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    if (mStartButton) {
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        mStartButton->setEnabled(false);
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    }
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    // start countdown
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    mCounter = 0;
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    playSound();
19
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    mTimer.start(1000); // 1000 milliseconds == 1 second
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    CX_DEBUG_EXIT_FUNCTION();
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}
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/*!
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    Slot for receiving changes to the selftimer countdown timeout.
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    \param seconds Amount of seconds for the selftimer countdown. If the value is
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    0 then selftimer is disabled.
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 */
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void CxuiSelfTimer::changeTimeOut(int seconds)
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{
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    CX_DEBUG_ENTER_FUNCTION();
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    // make sure that timer is not running (should not be)
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    reset(false);
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    // set the new timer value
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    // if incoming value is 0, it means that the selftimer is disabled
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    if (seconds > 0) {
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        mDelay = seconds;
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    } else {
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        //value == 0
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        mDelay = -1;
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    }
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    updateWidgets();
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    CX_DEBUG_EXIT_FUNCTION();
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}
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/*! Resets the selftimer countdown.
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    Countdown is stopped, and set back to starting value. Start button is set enabled.
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    @param update Update the UI widgets if true, skip update if false.
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    Can be used to by-pass the UI update if planned to do shortly again.
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 */
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void CxuiSelfTimer::reset(bool update)
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{
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    // Stop timer and reset counter.
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    mTimer.stop();
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    mSound.stop();
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    mCounter = 0;
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    // Set start buttonback to enabled.
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    if (mStartButton) {
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        mStartButton->setEnabled(true);
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    }
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    // Update UI if requested.
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    if(update) {
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        updateWidgets();
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    }
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}
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/*! Updates the selftimer widgets
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    Changes the visibility of the selftimer widgets (counter and cancel button)
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    based on the timeoutValue. Updates the counter value.
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 */
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void CxuiSelfTimer::updateWidgets()
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{
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    CX_DEBUG_ENTER_FUNCTION();
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    int remaining(mDelay - mCounter);
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    CX_DEBUG(("remaining time %d", remaining));
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    if (mTimerLabel) {
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        mTimerLabel->setPlainText(QString::number(remaining));
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    }
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    if (isEnabled()) {
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        showWidgets();
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    } else {
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        hideWidgets();
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    }
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    CX_DEBUG_EXIT_FUNCTION();
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}
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/*!
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    Shows the selftimer widgets.
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 */
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void CxuiSelfTimer::showWidgets()
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{
21
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    if (mWidgetContainer){
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        mWidgetContainer->show();
19
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    }
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}
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/*!
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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    Hides the selftimer widgets.
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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   352
 */
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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   353
void CxuiSelfTimer::hideWidgets()
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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{
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Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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   355
    if (mWidgetContainer){
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parents: 19
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        mWidgetContainer->hide();
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    }
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   359
19
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d9aefe59d544 Revision: 201011
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
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}