/*

* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:

*

*/

#include <qlabel.h>

#include <qboxlayout.h>

#include <qgroupbox.h>

#include <qpushbutton.h>

#include <qcombobox.h>

#include <qlayoutitem.h>

#include <qfiledialog.h>

#include <qaction.h>

#include "exampleappui.h"

#include "exampleappengine.h"

#include "trace.h"

/*!

    \class ExampleAppUi

    \brief Implements the application UI for Dlnasrv example application.

*/

/*!

    ExampleAppUi constructor.

 */

ExampleAppUi::ExampleAppUi():

    mEngine(0),

    mSelectedRenderer(0),

    mSelectedFileLabel(0),

    mPlaybackStatus(0),

    mRenderingDevices(0),

    mPauseButton(0),

    mStopButton(0),

    mRewButton(0),

    mFfButton(0),

    mSelectFileButton(0),

    mSearchDevicesButton(0),

    mSelectedFile("")

{

    FUNC_LOG

}

/*!

    ExampleAppUi destructor.

*/

ExampleAppUi::~ExampleAppUi()

{

    FUNC_LOG

    delete mEngine;

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::construct()

{

    FUNC_LOG

    createEngine();

    createUi();

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::createUi()

{

    FUNC_LOG

    // create main view

    QWidget *view = new QWidget;

    setCentralWidget(view);

    // create main view layout

    QVBoxLayout *mainLayout = new QVBoxLayout;

    view->setLayout(mainLayout);

    // create accesspoint selection

    QLayout *layout = createApSelectionUi();

    mainLayout->addLayout(layout);

    mainLayout->addSpacing(40);

    // create renderer selection

    layout = createRendererSelectionUi();

    mainLayout->addLayout(layout);

    mainLayout->addSpacing(40);

    // create file selection

    layout = createFileSelectionUi();

    mainLayout->addLayout(layout);

    mainLayout->addSpacing(40);

    // create playback ui

    layout = createPlaybackUi();

    mainLayout->addLayout(layout);

    mainLayout->addSpacing(40);

}

/*!

    description

    /a

    /return

 */

QLayout *ExampleAppUi::createApSelectionUi()

{

    FUNC_LOG

    QVBoxLayout *layout = new QVBoxLayout;

    QHBoxLayout *topLayout = new QHBoxLayout;

    QLabel *titleLabel = new QLabel(tr("Access point:"));

    QLabel *statusLabel = new QLabel(tr("Not connected"));    

    // connect signals

    connect(mEngine, SIGNAL(iapUpdated(const QString &)), statusLabel, SLOT(setText(const QString &)));

    // add widgets to top layout

    topLayout->addWidget(titleLabel);

    topLayout->addWidget(statusLabel);

    // add sub layouts to main layout

    layout->addLayout(topLayout);

    // update iap

    QString iapName = mEngine->getIapName();

    if (iapName.length())

    {

        statusLabel->setText(iapName);

    }

    return layout;

}

/*!

    description

    /a

    /return

 */

QLayout *ExampleAppUi::createRendererSelectionUi()

{

    FUNC_LOG

    QVBoxLayout *layout = new QVBoxLayout;

    QHBoxLayout *topLayout = new QHBoxLayout;

    QVBoxLayout *bottomLayout = new QVBoxLayout;

    QLabel *titleLabel = new QLabel(tr("Rendering device:"));

    QLabel *statusLabel = new QLabel(tr("Not connected"));

    QPushButton *searchButton = new QPushButton(tr("Search for new devices"));

    QComboBox *selectionComboBox = new QComboBox;

    // connect signals

    connect(searchButton, SIGNAL(clicked()), mEngine, SLOT(searchRenderingDevices()));

    connect(selectionComboBox, SIGNAL(currentIndexChanged(int)), this, SLOT(selectRenderingDevice(int)));

    connect(mEngine, SIGNAL(iapUpdated(int)), this, SLOT(enableRenderingDeviceSelection(int)));

    // add widgets to top layout

    topLayout->addWidget(titleLabel);

    topLayout->addWidget(statusLabel);

    // add widgets to bottom layout

    bottomLayout->addWidget(searchButton);

    bottomLayout->addWidget(selectionComboBox);

    // add sub layouts to main layout

    layout->addLayout(topLayout);

    layout->addLayout(bottomLayout);

    // store rendering devices

    mRenderingDevices = selectionComboBox;

    mSelectedRenderer = statusLabel;

    mSearchDevicesButton = searchButton;

    // disable search button if iap has not been defined

    if (!mEngine->getIap())

    {

        disableRenderingDeviceSelection();

    }

    return layout;

}

/*!

    description

    /a

    /return

 */

QLayout *ExampleAppUi::createFileSelectionUi()

{

    FUNC_LOG

    QVBoxLayout *layout = new QVBoxLayout;

    QHBoxLayout *topLayout = new QHBoxLayout;

    QVBoxLayout *bottomLayout = new QVBoxLayout;    

    QLabel *titleLabel = new QLabel(tr("Selected file:"));

    QLabel *statusLabel = new QLabel(tr("None"));

    QPushButton *selectButton = new QPushButton(tr("Select media file"));

    // connect signals

    connect(selectButton, SIGNAL(clicked()), this, SLOT(selectFile()));

    // add widgets to top layout

    topLayout->addWidget(titleLabel);

    topLayout->addWidget(statusLabel);

    // add widgets to bottom layout

    bottomLayout->addWidget(selectButton);

    // add sub layouts to main layout

    layout->addLayout(topLayout);

    layout->addLayout(bottomLayout);

    // store status label and select file button

    mSelectedFileLabel = statusLabel;

    mSelectFileButton = selectButton;

    // disable select file button by default

    disableFileSelection();

    return layout;

}

/*!

    description

    /a

    /return

 */

QLayout *ExampleAppUi::createPlaybackUi()

{

    FUNC_LOG

    QVBoxLayout *layout = new QVBoxLayout;

    QHBoxLayout *topLayout = new QHBoxLayout;

    QHBoxLayout *bottomLayout = new QHBoxLayout;

    QLabel *titleLabel = new QLabel(tr("Playback status:"));

    QLabel *statusLabel = new QLabel(tr("Stopped"));

    QPushButton *rewButton = new QPushButton(tr("Rew"));    

    QPushButton *playButton = new QPushButton(tr("Play"));    

    QPushButton *pauseButton = new QPushButton(tr("Pause"));    

    QPushButton *stopButton = new QPushButton(tr("Stop"));    

    QPushButton *ffButton = new QPushButton(tr("Ff"));    

    // connect signals

    connect(rewButton, SIGNAL(clicked()), mEngine, SLOT(rew()));

    connect(playButton, SIGNAL(clicked()), mEngine, SLOT(play()));

    connect(pauseButton, SIGNAL(clicked()), mEngine, SLOT(pause()));

    connect(stopButton, SIGNAL(clicked()), mEngine, SLOT(stop()));

    connect(ffButton, SIGNAL(clicked()), mEngine, SLOT(ff()));

    // add widgets to top layout

    topLayout->addWidget(titleLabel);

    topLayout->addWidget(statusLabel);

    // add widgets to bottom layout

    bottomLayout->addWidget(rewButton);

    bottomLayout->addWidget(playButton);

    bottomLayout->addWidget(pauseButton);

    bottomLayout->addWidget(stopButton);

    bottomLayout->addWidget(ffButton);

    // add sub layouts to main layout

    layout->addLayout(topLayout);

    layout->addLayout(bottomLayout);

    // store status label

    mPlaybackStatus = statusLabel;

    mPlayButton = playButton;

    mPauseButton = pauseButton;

    mStopButton = stopButton;

    mRewButton = rewButton;

    mFfButton = ffButton;

    // disable all buttons by default

    disablePlayback();

    return layout;

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::createEngine()

{

    FUNC_LOG

    mEngine = new ExampleAppEngine;

    mEngine->construct();

    // connect signals

    connect(mEngine, SIGNAL(stateChanged(int)), this, SLOT(updateState(int)));

    connect(mEngine, SIGNAL(renderingDeviceSearchStarted()), this, SLOT(deviceSearchStarted()));

    connect(mEngine, SIGNAL(renderingDeviceFound(const QString &, const QString &)), this, SLOT(addRenderingDevice(const QString &, const QString &)));

    connect(mEngine, SIGNAL(renderingDeviceDisappeared(const QString &, const QString &)), this, SLOT(removeRenderingDevice(const QString &, const QString &)));

    connect(mEngine, SIGNAL(initComplete(int)), this, SLOT(enablePlayback(int)));

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::updateState(int newState)

{

    FUNC_LOG

    switch (newState)

    {

        case ExampleAppEngine::PlaybackStateBuffering:

        {

            mPlaybackStatus->setText(tr("Buffering"));

            break;

        }

        case ExampleAppEngine::PlaybackStatePlaying:

        {

            mPlaybackStatus->setText(tr("Playing"));

            break;

        }

        case ExampleAppEngine::PlaybackStatePaused:

        {

            mPlaybackStatus->setText(tr("Paused"));

            break;

        }

        case ExampleAppEngine::PlaybackStateStopped:

            // fall through

        default:

        {

            mPlaybackStatus->setText(tr("Stopped"));

            break;

        }

    }

    // update playback controls

    enablePlayback();

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::selectFile()

{

    FUNC_LOG

    mSelectedFile = QFileDialog::getOpenFileName(this,

        tr("Open file"),

        tr("e:\\"),

        tr("Media Files (*.mp3 *.jpg *.mp4)"));

    if (mSelectedFile.length())

    {

        // convert all '/' to '\' since symbian does not understand '/' 

        // characters in the file path

        mSelectedFile.replace("/", "\\");

        // update text to ui

        QFileInfo fileInfo(mSelectedFile);

        // use only 20 characters to fit text on screen 

        // since otherwise qt will panic with bad alloc

        mSelectedFileLabel->setText(fileInfo.fileName().left(20));

        // resolve and init file for rendering

        int err = mEngine->initFile(mSelectedFile);

        if (err != 0)

        {

            ERROR_1(err, "Failed to init file %s", mSelectedFile.utf16());

            mSelectedFile = "";

            mSelectedFileLabel->setText(tr("Could not init"));

            disablePlayback();

        }

    }

    else

    {

        mSelectedFileLabel->setText(tr("Not selected"));

        disablePlayback();

    }

}

/*!

    description

    /a

    /return

*/

void ExampleAppUi::deviceSearchStarted()

{

    FUNC_LOG

    if (!mRenderingDevices->count())

    {

        mSelectedRenderer->setText(tr("Searching"));

    }

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::addRenderingDevice(const QString &name, const QString &uuid)

{

    FUNC_LOG

    mRenderingDevices->addItem(name, QVariant(uuid));

}

/*!

    description

    /a

    /return

 */

void ExampleAppUi::removeRenderingDevice(const QString &/*name*/, const QString &uuid)

{

    FUNC_LOG

    int count(mRenderingDevices->count());

    for (int i = 0; i < count; i++)

    {

        QVariant userData(mRenderingDevices->itemData(i));

        if (userData.toString() == uuid)

        {

            mRenderingDevices->removeItem(i);

            break;

        }

    }

}

/*!

    description

    /a

    /return

*/

void ExampleAppUi::selectRenderingDevice(int index)

{

    FUNC_LOG

    // use only 16 characters to fit on screen otherwise qt will panic with bad alloc

    mSelectedRenderer->setText(mRenderingDevices->itemText(index).left(16));

    QVariant userData(mRenderingDevices->itemData(index));

    mEngine->prepareRenderingDevice(userData.toString());

    enablePlayback();

    enableFileSelection();

}

/*!

    description

    /a

    /return

*/

void ExampleAppUi::enablePlayback(int result)

{

    FUNC_LOG

    if (result == 0 &&

        mSelectedFile.length())

    {

        switch (mEngine->getPlaybackState())

        {

            case ExampleAppEngine::PlaybackStateBuffering:

            {

                // disable all controls when buffering

                disablePlayback();

                break;

            }

            case ExampleAppEngine::PlaybackStatePlaying:

            {

                mRewButton->setEnabled(mEngine->isSeekSupported());

                mPlayButton->setDisabled(true);

                mPauseButton->setEnabled(mEngine->isPauseSupported());

                mStopButton->setEnabled(true);

                mRewButton->setEnabled(mEngine->isSeekSupported());

                break;

            }

            case ExampleAppEngine::PlaybackStatePaused:

            {

                mRewButton->setEnabled(mEngine->isSeekSupported());

                mPlayButton->setEnabled(true);

                mPauseButton->setDisabled(true);

                mStopButton->setEnabled(true);

                mRewButton->setEnabled(mEngine->isSeekSupported());

                break;

            }

            case ExampleAppEngine::PlaybackStateStopped:

            {

                mRewButton->setDisabled(true);

                mPlayButton->setEnabled(true);

                mPauseButton->setDisabled(true);

                mStopButton->setDisabled(true);

                mRewButton->setDisabled(true);

                break;

            }

            default: