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** This file is part of the examples of the Qt Toolkit.

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#include <QGraphicsView>

#include <QGraphicsWidget>

#include <QGraphicsLinearLayout>

#include <QList>

#include "button.h"

#include "menu.h"

#include "themeevent.h"

#include "theme.h"

static const int MinMenuItemWidth = 150;

static const int MinMenuItemHeight = 40;

Menu::Menu(QGraphicsView* parent) : QGraphicsWidget(),

    m_Parent(parent), m_Layout(new QGraphicsLinearLayout(Qt::Vertical, this)),

    m_ButtonContainer(0), m_isMenuVisible(false), m_currentSelectedIndex(-1)

{

    init();

}

Menu::~Menu()

{

    for(int i = 0; i < m_ButtonContainer->count(); i++ ) {

        delete m_ButtonContainer->at(i);

    }

    m_ButtonContainer->clear();

    delete m_ButtonContainer;

    m_ButtonContainer = 0;

}

void Menu::init()

{

    m_ButtonContainer = new QList<Button*>;

    m_Layout->setContentsMargins(0,0,0,0);

    m_Layout->setSpacing(0);

    setMinimumWidth(150); 

    setLayout(m_Layout);

    connect(Theme::p(), SIGNAL(themeChanged()), this, SLOT(themeChange()));

}

Button* Menu::addMenuItem(const QString itemName, QObject* receiver, const char* member)

{

    Button* button = new Button(itemName ,this);

    button->setVisible(m_isMenuVisible);

    connect(button, SIGNAL(clicked(bool)), receiver, member);

    connect(button, SIGNAL(clicked(bool)), this, SLOT(menuShowHide()));

    m_ButtonContainer->append(button);

    button->setMinimumWidth(MinMenuItemWidth);

    button->setMinimumHeight(MinMenuItemHeight);

    return button;

}

void Menu::menuShowHide()

{

    m_isMenuVisible ? menuHide() : menuShow();

    m_isMenuVisible = !m_isMenuVisible;

}

void Menu::menuShow()

{

    for(int i = 0; i < m_ButtonContainer->count(); i++) {

        Button* button = m_ButtonContainer->at(i);

        m_Layout->addItem(button);

        button->show();

    }

}

void Menu::menuHide()

{

    for(int i = 0; i < m_ButtonContainer->count(); i++) {

        Button* button = m_ButtonContainer->at(i);

        button->select(false);

        button->hide();

        m_Layout->removeItem(button);

    }

    m_currentSelectedIndex = -1;

}

void Menu::themeChange()

{

    QPixmap pixmap = Theme::p()->pixmap("status_field_middle.svg", 

            QSize(MinMenuItemWidth, MinMenuItemHeight));

    for(int i = 0; i < m_ButtonContainer->count(); i++) {

        Button* button = m_ButtonContainer->at(i);

        button->setBackground(pixmap);

    }

    update();

}

void Menu::keyPressEvent(QKeyEvent *event)

{

    //S60 3.x specific

    if(event->key() == 16777235 ) { //Up Arrow

        if(m_currentSelectedIndex > 0) { //One step up

            Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

            button->select(false);

            button->update();

            m_currentSelectedIndex--;

            button = m_ButtonContainer->at(m_currentSelectedIndex);

            button->select(true);

            button->update();

        }

        else { //Jump to bottom

            if(m_currentSelectedIndex >= 0) {

               Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

               button->select(false);

               button->update();

           }

            m_currentSelectedIndex = m_ButtonContainer->count() -1;

            if(m_currentSelectedIndex >= 0) {

                Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

                button->select(true);

                button->update();

            }

        }

    }

    if(event->key() == 16777237 ) { //Down Arrow

        if (m_currentSelectedIndex < m_ButtonContainer->count()-1) { //One step down

            if(m_currentSelectedIndex >= 0) {

                Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

                button->select(false);

                button->update();

            }

            m_currentSelectedIndex++;

            Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

            button->select(true);

            button->update();

        }

        else { //Jump to top

            if(m_currentSelectedIndex >= 0) {

                Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

                button->select(false);

                button->update();

                m_currentSelectedIndex = 0;

                button = m_ButtonContainer->at(m_currentSelectedIndex);

                button->select(true);

                button->update();

            }

        }

    }

    if(event->key() == 17825792 || event->key() == 16842752 || //LSK, center key or enter

            event->key() == 16777221 ) { 

        if(m_currentSelectedIndex >= 0) {

            Button* button = m_ButtonContainer->at(m_currentSelectedIndex);

            button->click();

        }

    }

    if(event->key() == 17825793 ) { //RSK

        menuShowHide();

    }

}