/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** 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, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include "hbmenu.h"

#include "hbmenu_p.h"

#include "hbmenuitem_p.h"

#include "hbaction.h"

#include <hbwidgetfeedback.h>

#include "hbinstance.h"

#include "hbmenucontainer_p.h"

#ifdef HB_EFFECTS

#include "hbeffect.h"

#include "hbeffectinternal_p.h"

bool HbMenuPrivate::menuEffectsLoaded = false;

#endif

#include "hbglobal_p.h"

#include <QPointer>

Q_DECLARE_METATYPE (QAction*)// krazy:exclude=qclasses

HbMenuPrivate::HbMenuPrivate():

    HbPopupPrivate(),

    menuItemView(0),

    subMenuAction(0),

    activeSubMenu(0),

    actionTriggered(false),

    menuType(HbMenu::ContextMenu),

    mSubMenuItem(0),

    mRightMargin(0.0),

    mDownMargin(0.0),

    delayMenuConstruction(true),

    receiverToDisconnectOnClose(0),

{

}

HbMenuPrivate::~HbMenuPrivate()

{

}

void HbMenuPrivate::init()

{

    Q_Q(HbMenu);

    subMenuAction = new HbAction(q);

    subMenuAction->setMenu(q);

    q->setTimeout(HbPopup::ContextMenuTimeout);

    q->setBackgroundFaded(false);

}

void HbMenuPrivate::addPopupEffects()

{

#ifdef HB_EFFECTS

    hasEffects = menuEffectsLoaded;

    if (menuEffectsLoaded)

        return;

    menuEffectsLoaded = true;

    hasEffects = HbEffectInternal::add("HB_MENU", "menu_appear", "appear");

    if (hasEffects) {

        hasEffects = HbEffectInternal::add("HB_MENU", "menu_disappear", "disappear");

        if (hasEffects) {

            hasEffects = HbEffectInternal::add("HB_menuitem", "menuitem_press", "clicked");

        }

    }

#endif

}

void HbMenuPrivate::_q_triggerAction(HbMenuItem *currentItem)

{

    Q_Q(HbMenu);

    if (currentItem && currentItem->action()){

        HbWidgetFeedback::triggered(currentItem, Hb::InstantClicked);

#ifdef HB_EFFECTS

        if (hasEffects) {

            HbEffect::start(currentItem, "HB_menuitem", "clicked");

        }

#endif

        HbAction *hbAction = qobject_cast<HbAction *>(currentItem->action());

        if (hbAction && hbAction->menu() && !actionTriggered) {

            hbAction->trigger();

            stopTimeout();

            openSubmenu(currentItem);

        } else {

            q->close();

            if (!actionTriggered) { // prevent duplicate events

                currentItem->action()->trigger();

            }

            actionTriggered = true;

        }

    }

}

void HbMenuPrivate::createMenuView()

{

    Q_Q(HbMenu);

    if (!menuItemView && q->actions().count()){

        HbStyle::setItemName(menuItemView, "content");

        //This optimises case of options menu which otherwise updates its primitives twice.

        if (menuType ==  HbMenu::OptionsMenu)

            q->setFrameType(HbPopup::Strong);

            q->setFrameType(HbPopup::Weak);

        if (polished)//This check can be removed once base class repolish is fixed.

            q->repolish();

}

void HbMenuPrivate::delayedLayout()

{

}

void HbMenuPrivate::changeToOptionsMenu()

{

    menuType = HbMenu::OptionsMenu;

}

HbMenuItem *HbMenuPrivate::subMenuItem()

{

    return mSubMenuItem;

}

void HbMenuPrivate::setSubMenuItem(HbMenuItem *menuItem)

{

    mSubMenuItem = menuItem;

}

void HbMenuPrivate::_q_onActionTriggered()

{

    Q_Q(HbMenu);

    }

}

void HbMenuPrivate::_q_subMenuItemTriggered(HbAction *action)

{

    Q_Q(HbMenu);    

    // do not close the menu tree if the triggered action is

    // submenu item

    if (!action->menu()) { 

        q->close();

    } else {

        stopTimeout();

    }

}

void HbMenuPrivate::actionAdded(QActionEvent *actionEvent)

{

    if (delayMenuConstruction)

        return;

    Q_Q(HbMenu);

    QObject::connect(actionEvent->action(), SIGNAL(triggered()), q, SLOT(_q_onActionTriggered()));

    if (actionEvent->action()->isVisible()){        

        createMenuView();        

        menuItemView->addActionItem(actionEvent->action());

    }

}

void HbMenuPrivate::actionRemoved(QActionEvent *actionEvent)

{

    if (delayMenuConstruction)

        return;

    Q_Q(HbMenu);

    QObject::disconnect(actionEvent->action(), 0, q, 0);

    if (menuItemView)

        menuItemView->removeActionItem(actionEvent->action());

}

void HbMenuPrivate::actionChanged(QActionEvent *actionEvent)

{

    if (delayMenuConstruction)

        return;

    if (menuItemView)

        menuItemView->updateActionItem(actionEvent->action());

}

/*

*/

HbAction *HbMenuPrivate::activeAction(HbMenuItem *&activeItem) const

{

    if(!menuItemView)

        return 0;

    HbAction *action = 0;

    HbMenuItem *currentItem = menuItemView->currentItem();

    if(currentItem && currentItem->action() && currentItem->action()->isVisible() &&

       currentItem->action()->isEnabled() && !currentItem->action()->isSeparator()) {

        action = static_cast<HbAction*>(currentItem->action());

        activeItem = currentItem;

    }

    return action;

}

/*

*/

HbAction *HbMenuPrivate::activeAction() const

{

    HbMenuItem* activeItem = 0;

    return activeAction(activeItem);

}

/*

*/

void HbMenuPrivate::openSubmenu(HbMenuItem *activeItem)

{

    Q_Q(HbMenu);

    if (!activeItem) {

        activeAction(activeItem);

    }

    if (activeItem && activeItem->action() && activeItem->action()->isEnabled()) {

        HbAction *hbAction = qobject_cast<HbAction *>(activeItem->action());

        if (!hbAction)

            return;

        HbMenu *subMenu = hbAction->menu();

        if ( subMenu ) {

            subMenu->setLayoutDirection(q->layoutDirection());

            activeSubMenu = subMenu; 

            subMenu->setTimeout(timeout); 

            QObject::disconnect(subMenu, SIGNAL(aboutToClose()), q, SLOT(_q_subMenuTimedOut()));

            QObject::connect(subMenu, SIGNAL(aboutToClose()), q, SLOT(_q_subMenuTimedOut()));

            QObject::connect(subMenu, SIGNAL(triggered(HbAction*)), q, SLOT(_q_subMenuItemTriggered(HbAction*)));

            subMenu->show();

            // Reset the active submenu so that mouse event handling works.

            // huh ? activeSubMenu = 0;

        }

    }

}

void HbMenuPrivate::_q_subMenuTimedOut()

{

    Q_Q(HbMenu);

    if( menuTimedOut (activeSubMenu) ) {

        if ( activeSubMenu ) {

            activeSubMenu->disconnect();

        }

        timedOut = true;

        q->close();

    } else {

        startTimeout();

    }

}

void HbMenuPrivate::_q_handleMenuClose()

{

    Q_Q(HbMenu);

    if ( menuType == HbMenu::ContextMenu || menuType == HbMenu::OptionsMenu ) {

        if(activeSubMenu){

            HbAction* action = activeSubMenu->activeAction();

            if(action) {

                closeMenuRecursively(action);

            }

            closeSubmenu();

        }

        q->close();

    }

}

*/

void HbMenuPrivate::closeMenu()

{

    Q_Q(HbMenu);

    HbMainWindow* w(q->mainWindow());

    if ( w ){

        QObject::disconnect( w, SIGNAL(aboutToChangeOrientation()),

                             q, SLOT(_q_handleMenuClose()));

        QObject::connect( w, SIGNAL(aboutToChangeOrientation()),

                        q, SLOT(_q_handleMenuClose()));

        QObject::disconnect( w, SIGNAL(aboutToChangeView(HbView*, HbView*)),

                          q, SLOT(_q_handleMenuClose()));

        QObject::connect( w, SIGNAL(aboutToChangeView(HbView*, HbView*)),

                          q, SLOT(_q_handleMenuClose()));

    }

}

void HbMenuPrivate::closeMenuRecursively(HbAction* menuAction)

{

    if(menuAction->menu() && menuAction->menu()->activeAction()) {

        closeMenuRecursively(menuAction->menu()->activeAction());

    }

    if(menuAction->menu()) {

        menuAction->menu()->close();

    }

}

bool HbMenuPrivate::menuTimedOut(HbMenu* menu)

{

    return (menu && menu->timeout() > 0 && HbMenuPrivate::d_ptr(menu)->timedOut);

}

void HbMenuPrivate::closeSubmenu()

{

    // Check whether this is a submenu.

    if (activeSubMenu) {

        activeSubMenu->close();

    }

}

void HbMenuPrivate::setSubMenuPosition()

{

    Q_Q(HbMenu);

    if (mSubMenuItem) {        

        qreal upperEdge = mSubMenuItem->scenePos().y() + mSubMenuItem->size().height() * 2 / 3;

        QSizeF windowSize = QSizeF(0,0);

        if (q->mainWindow()) {

            windowSize = q->mainWindow()->layoutRect().size();

        }

        if (windowSize.height() - mDownMargin - q->preferredHeight() < upperEdge) {

            upperEdge = windowSize.height() - mDownMargin - q->preferredHeight();

        }

        if (q->layoutDirection() == Qt::LeftToRight) {

            qreal leftEdge = mSubMenuItem->scenePos().x() +

                             mSubMenuItem->size().width() - mRightMargin;

            if ((windowSize.width() - q->size().width()) < leftEdge) {

                leftEdge = mSubMenuItem->scenePos().x() +

                           mSubMenuItem->size().width() +

                           mRightMargin - q->size().width();

            }

        } else {

            qreal rightEdge = mSubMenuItem->scenePos().x() + mRightMargin;

            if ((rightEdge - q->size().width()) < 0) {

                rightEdge = mSubMenuItem->scenePos().x() - mRightMargin +

                            q->size().width();

            }

            q->setPreferredPos(QPointF(rightEdge, upperEdge), HbPopup::TopRightCorner);

        }

    }

}

/*!

    @beta

    @hbcore

    \class HbMenu