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**
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#include "welcomeplugin.h"

#include <extensionsystem/pluginmanager.h>

#include <coreplugin/coreconstants.h>
#include <coreplugin/icore.h>
#include <coreplugin/imode.h>
#include <coreplugin/modemanager.h>
#include <coreplugin/editormanager/editormanager.h>
#include <coreplugin/dialogs/iwizard.h>

#include <projectexplorer/projectexplorer.h>

#include <utils/hostosinfo.h>
#include <utils/styledbar.h>
#include <utils/iwelcomepage.h>
#include <utils/networkaccessmanager.h>

#include <QScrollArea>
#include <QDesktopServices>
#include <QPainter>
#include <QHBoxLayout>

#include <QCoreApplication>
#include <QDir>
#include <QSettings>
#include <QDebug>
#include <QUrl>
#include <QtPlugin>

#include <QDeclarativeView>
#include <QDeclarativeContext>
#include <QDeclarativeEngine>
#include <QDeclarativeNetworkAccessManagerFactory>

enum { debug = 0 };

using namespace ExtensionSystem;
using namespace Utils;

static const char currentPageSettingsKeyC[] = "WelcomeTab";

namespace Welcome {
namespace Internal {

class NetworkAccessManagerFactory : public QDeclarativeNetworkAccessManagerFactory
{
public:
    NetworkAccessManagerFactory(): QDeclarativeNetworkAccessManagerFactory() {}
    QNetworkAccessManager* create(QObject *parent) { return new Utils::NetworkAccessManager(parent); }
};


struct WelcomeModePrivate
{

};

class WelcomeMode : public Core::IMode
{
    Q_OBJECT
    Q_PROPERTY(int activePlugin READ activePlugin WRITE setActivePlugin NOTIFY activePluginChanged)
public:
    WelcomeMode();
    ~WelcomeMode();

    void activated();
    void initPlugins();
    int activePlugin() const { return m_activePlugin; }

    Q_SCRIPTABLE QString platform() const;

    bool eventFilter(QObject *, QEvent *);
public slots:
    void newProject();
    void openProject();

    void setActivePlugin(int pos)
    {
        if (m_activePlugin != pos) {
            m_activePlugin = pos;
            emit activePluginChanged(pos);
        }
    }

signals:
    void activePluginChanged(int pos);

private slots:
    void welcomePluginAdded(QObject*);

private:
    void facilitateQml(QDeclarativeEngine *engine);

    QWidget *m_modeWidget;
    QDeclarativeView *m_welcomePage;
    QHBoxLayout * buttonLayout;
    QList<QObject*> m_pluginList;
    int m_activePlugin;
    NetworkAccessManagerFactory *m_networkAccessManagerFactory;
};

// ---  WelcomeMode
WelcomeMode::WelcomeMode() :
    m_activePlugin(0)
    , m_networkAccessManagerFactory(new NetworkAccessManagerFactory)
{
    setDisplayName(tr("Welcome"));
    setIcon(QIcon(QLatin1String(Core::Constants::ICON_QTLOGO_32)));
    setPriority(Core::Constants::P_MODE_WELCOME);
    setId(Core::Constants::MODE_WELCOME);
    setType(Core::Constants::MODE_WELCOME_TYPE);
    setContextHelpId(QLatin1String("Qt Creator Manual"));
    setContext(Core::Context(Core::Constants::C_WELCOME_MODE));

    m_welcomePage = new QDeclarativeView;
    m_welcomePage->setResizeMode(QDeclarativeView::SizeRootObjectToView);
    // filter to forward dragEnter events
    m_welcomePage->installEventFilter(this);
    m_welcomePage->viewport()->installEventFilter(this);

    m_modeWidget = new QWidget;
    QVBoxLayout *layout = new QVBoxLayout;
    layout->setMargin(0);
    layout->setSpacing(0);
    m_modeWidget->setLayout(layout);

    Utils::StyledBar* styledBar = new Utils::StyledBar(m_modeWidget);
    layout->addWidget(styledBar);
    QScrollArea *scrollArea = new QScrollArea(m_modeWidget);
    scrollArea->setFrameShape(QFrame::NoFrame);
    layout->addWidget(scrollArea);
    scrollArea->setWidget(m_welcomePage);
    scrollArea->setWidgetResizable(true);
    m_welcomePage->setMinimumWidth(880);
    m_welcomePage->setMinimumHeight(548);
    PluginManager *pluginManager = PluginManager::instance();
    connect(pluginManager, SIGNAL(objectAdded(QObject*)), SLOT(welcomePluginAdded(QObject*)));

    setWidget(m_modeWidget);
}

bool WelcomeMode::eventFilter(QObject *, QEvent *e)
{
    if (e->type() == QEvent::DragEnter) {
        e->ignore();
        return true;
    }
    return false;
}

WelcomeMode::~WelcomeMode()
{
    QSettings *settings = Core::ICore::settings();
    settings->setValue(QLatin1String(currentPageSettingsKeyC), activePlugin());
    delete m_modeWidget;
    delete m_networkAccessManagerFactory;
}

bool sortFunction(Utils::IWelcomePage * a, Utils::IWelcomePage *b)
{
    return a->priority() < b->priority();
}

void WelcomeMode::facilitateQml(QDeclarativeEngine * /*engine*/)
{
}

void WelcomeMode::initPlugins()
{
    QSettings *settings = Core::ICore::settings();
    setActivePlugin(settings->value(QLatin1String(currentPageSettingsKeyC)).toInt());

    // TODO: re-enable reading from Settings when possible. See QTCREATORBUG-6803
    if (activePlugin() > 1)
        setActivePlugin(1);

    QDeclarativeContext *ctx = m_welcomePage->rootContext();
    ctx->setContextProperty(QLatin1String("welcomeMode"), this);

    QList<Utils::IWelcomePage*> duplicatePlugins = PluginManager::getObjects<Utils::IWelcomePage>();
    qSort(duplicatePlugins.begin(), duplicatePlugins.end(), &sortFunction);

    QList<Utils::IWelcomePage*> plugins;
    QHash<Utils::IWelcomePage::Id, Utils::IWelcomePage*> pluginHash;

    //avoid duplicate ids - choose by priority
    foreach (Utils::IWelcomePage* plugin, duplicatePlugins) {
        if (pluginHash.contains(plugin->id())) {
            Utils::IWelcomePage* pluginOther = pluginHash.value(plugin->id());

            if (pluginOther->priority() > plugin->priority()) {
                plugins.removeAll(pluginOther);
                pluginHash.remove(pluginOther->id());
                plugins << plugin;
                pluginHash.insert(plugin->id(), plugin);
            }

        } else {
            plugins << plugin;
            pluginHash.insert(plugin->id(), plugin);
        }
    }


    QDeclarativeEngine *engine = m_welcomePage->engine();
    QStringList importPathList = engine->importPathList();
    importPathList << Core::ICore::resourcePath() + QLatin1String("/welcomescreen");
    engine->setImportPathList(importPathList);
    if (!debug)
        engine->setOutputWarningsToStandardError(false);
    engine->setNetworkAccessManagerFactory(m_networkAccessManagerFactory);
    QString pluginPath = QCoreApplication::applicationDirPath();
    if (HostOsInfo::isMacHost())
        pluginPath += QLatin1String("/../PlugIns");
    else
        pluginPath += QLatin1String("/../" IDE_LIBRARY_BASENAME "/qtcreator");
    engine->addImportPath(QDir::cleanPath(pluginPath));
    facilitateQml(engine);
    foreach (Utils::IWelcomePage *plugin, plugins) {
        plugin->facilitateQml(engine);
        m_pluginList.append(plugin);
    }

    ctx->setContextProperty(QLatin1String("pagesModel"), QVariant::fromValue(m_pluginList));

    // finally, load the root page
    m_welcomePage->setSource(
            QUrl::fromLocalFile(Core::ICore::resourcePath() + QLatin1String("/welcomescreen/welcomescreen.qml")));
}

QString WelcomeMode::platform() const
{
    switch (HostOsInfo::hostOs()) {
    case HostOsInfo::HostOsWindows: return QLatin1String("windows");
    case HostOsInfo::HostOsMac: return QLatin1String("mac");
    case HostOsInfo::HostOsLinux: return QLatin1String("linux");
    case HostOsInfo::HostOsOtherUnix: return QLatin1String("unix");
    default: return QLatin1String("other");
    }
}

void WelcomeMode::welcomePluginAdded(QObject *obj)
{
    QHash<Utils::IWelcomePage::Id, Utils::IWelcomePage*> pluginHash;

    foreach (QObject *obj, m_pluginList) {
        Utils::IWelcomePage *plugin = qobject_cast<Utils::IWelcomePage*>(obj);
        pluginHash.insert(plugin->id(), plugin);
    }
    if (Utils::IWelcomePage *plugin = qobject_cast<Utils::IWelcomePage*>(obj)) {
        //check for duplicated id
        if (pluginHash.contains(plugin->id())) {
            Utils::IWelcomePage* pluginOther = pluginHash.value(plugin->id());

            if (pluginOther->priority() > plugin->priority()) {
                m_pluginList.removeAll(pluginOther);
            } else {
                return;
            }
        }

        int insertPos = 0;
        foreach (Utils::IWelcomePage* p, PluginManager::getObjects<Utils::IWelcomePage>()) {
            if (plugin->priority() < p->priority())
                insertPos++;
            else
                break;
        }
        m_pluginList.insert(insertPos, plugin);
        // update model through reset
        QDeclarativeContext *ctx = m_welcomePage->rootContext();
        ctx->setContextProperty(QLatin1String("pagesModel"), QVariant::fromValue(m_pluginList));
    }
}

void WelcomeMode::newProject()
{
    Core::ICore::showNewItemDialog(tr("New Project"),
                                               Core::IWizard::wizardsOfKind(Core::IWizard::ProjectWizard));
}

void WelcomeMode::openProject()
{
    ProjectExplorer::ProjectExplorerPlugin::instance()->openOpenProjectDialog();
}

WelcomePlugin::WelcomePlugin()
  : m_welcomeMode(0)
{
}

/*! Initializes the plugin. Returns true on success.
    Plugins want to register objects with the plugin manager here.

    \a errorMessage can be used to pass an error message to the plugin system,
       if there was any.
*/
bool WelcomePlugin::initialize(const QStringList & /* arguments */, QString * /* errorMessage */)
{
    m_welcomeMode = new WelcomeMode;
    addAutoReleasedObject(m_welcomeMode);

    return true;
}

/*! Notification that all extensions that this plugin depends on have been
    initialized. The dependencies are defined in the plugins .qwp file.

    Normally this method is used for things that rely on other plugins to have
    added objects to the plugin manager, that implement interfaces that we're
    interested in. These objects can now be requested through the
    PluginManagerInterface.

    The WelcomePlugin doesn't need things from other plugins, so it does
    nothing here.
*/
void WelcomePlugin::extensionsInitialized()
{
    m_welcomeMode->initPlugins();
    Core::ModeManager::activateMode(m_welcomeMode->id());
}

} // namespace Internal
} // namespace Welcome


Q_EXPORT_PLUGIN(Welcome::Internal::WelcomePlugin)

#include "welcomeplugin.moc"