/*!

* Copyright (c) 2009 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: Implements grid of numeric buttons

*

*/

#include <QPainter>

#include <hbmainwindow.h>

#include <hbcolorscheme.h>

#include <hbevent.h>

#include <hbinputkeymapfactory.h>

#include <hbinputkeymap.h>

#include <hbinpututils.h>

#include <hbinputsettingproxy.h>

#include <hbinputlanguage.h>

#include "dialpadnumericbutton.h"

#include "dialpadnumericbuttongrid.h"

static const int DialpadRowCount = 4;

static const int DialpadColumnCount = 3;

// layout values in units

static const qreal DialpadPrimaryTextSizeV = 5.25;

static const qreal DialpadPrimaryTextSizeH = 4.5;

static const qreal DialpadSecondaryTextSizeV = 3.8;

static const qreal DialpadSecondaryTextSizeH = 3.3;

static const qreal DialpadSecondaryTextSize2RowsH = 2.6;

static const qreal DialpadIconSizeV = 5.0;

static const qreal DialpadIconSizeH = 4.25;

static const qreal DialpadPrimaryTextLeftMargin  = 1.5;

static const qreal DialpadPrimarySecondaryMargin  = 1.0;

static const QLatin1String vmbxIcon("qtg_mono_voice_mailbox");

static const int DialpadKeyCodeTable[DialpadRowCount*DialpadColumnCount] =

{

    Qt::Key_1,        Qt::Key_2,      Qt::Key_3,

    Qt::Key_4,        Qt::Key_5,      Qt::Key_6,

    Qt::Key_7,        Qt::Key_8,      Qt::Key_9,

    Qt::Key_Asterisk, Qt::Key_0,      Qt::Key_NumberSign

};

DialpadNumericButtonGrid::DialpadNumericButtonGrid(

    const HbMainWindow& mainWindow,

    QGraphicsItem* parent) :

    HbInputButtonGroup(parent),

    mMainWindow(mainWindow),

    mUnit(.0),

    mMaxPrimaryLineWidth(.0),

    mPrimaryTextBaseline(.0)

{

    setObjectName("numericButtons");

    // create buttons

    setGridSize(QSize(DialpadColumnCount, DialpadRowCount));

    QList<HbInputButton*> buttons;

    for (int i = 0; i < DialpadRowCount * DialpadColumnCount; ++i) {

        DialpadNumericButton *item = new DialpadNumericButton(

            DialpadKeyCodeTable[i],

            QPoint(i % DialpadColumnCount, i / DialpadColumnCount));

        buttons.append(item);

        item->setType(HbInputButton::ButtonTypeNormal);

    }

    setButtons(buttons);

    // connect signals from buttons

    QObject::connect(this, SIGNAL(buttonPressed(const QKeyEvent&)),

                     this, SLOT(updateButtonLabels()));

    QObject::connect(this, SIGNAL(buttonReleased(const QKeyEvent&)),

                     this, SLOT(updateButtonLabels()));

    QObject::connect(this, SIGNAL(pressedButtonChanged(const QKeyEvent&,

                                                       const QKeyEvent&)),

                     this, SLOT(updateButtonLabels()));

    // update colors

    updateColorArray();

    // set button texts

    setButtonTexts();

    // set button icons

    button(0)->setIcon(HbIcon(vmbxIcon));

    // update button texts when input language is changed

    connect(HbInputSettingProxy::instance(),

            SIGNAL(globalInputLanguageChanged(HbInputLanguage)),

            this,

            SLOT(setButtonTexts()));

}

DialpadNumericButtonGrid::~DialpadNumericButtonGrid()

{

}

void DialpadNumericButtonGrid::resetButtons()

{

    cancelButtonPress();

}

QChar DialpadNumericButtonGrid::inputCharacter(int keyCode) const

{

    return mGeneratedChar.value(keyCode);

}

void DialpadNumericButtonGrid::setButtonTexts()

{

    HbInputLanguage inputLanguage =

        HbInputSettingProxy::instance()->globalInputLanguage();

    const HbKeymap *keymap =

        HbKeymapFactory::instance()->keymap(inputLanguage.language());

    mGeneratedChar.clear();

    if (keymap) {

        int buttonCount = (DialpadRowCount*DialpadColumnCount);

        for (int i = 0; i < buttonCount; i++) {

            int keyCode = DialpadKeyCodeTable[i];

            if (keyCode == Qt::Key_Asterisk) {

                // asterisk is not localized

                QChar asterisk('*');

                button(i)->setPrimaryLabel(asterisk);

                button(i)->setSecondaryLabel(QLatin1String("+"));

                mGeneratedChar.insert(Qt::Key_Asterisk, asterisk);

                continue;

            }

            if (keyCode == Qt::Key_NumberSign) {

                // number sign is not localized

                QChar numberSign('#');

                button(i)->setPrimaryLabel(numberSign);

                mGeneratedChar.insert(Qt::Key_NumberSign, numberSign);

                continue;

            }

            int index = i;

            if (keyCode==Qt::Key_0) {

                index = i-1;

            }

            const HbMappedKey *keyLabels =

                keymap->keyForIndex(HbKeyboardVirtual12KeyLabels, index);

            //

            // set digits

            // todo: input digit depend on digit type setting

            // QChar numberChar(QLocale::system().zeroDigit().unicode()+

            //                 (keyCode-0x30));

            //

            QChar numberChar;

            if (keyLabels && keyLabels->chars.count()>=1 &&

                keyLabels->chars.at(0).length()) {

                numberChar = keyLabels->chars.at(0).at(0);

            } else {

                // fallback to latin

                numberChar = QChar(keyCode);

            }

            button(i)->setPrimaryLabel(numberChar);

            mGeneratedChar.insert(keyCode,numberChar);

            //

            // set alphabets

            //

            if (keyLabels && keyLabels->chars.count()>=2) {

                button(i)->setSecondaryLabel(keyLabels->chars.at(1));

                if (keyLabels->chars.count()>=4) {

                    button(i)->setSecondaryLabelRow2(keyLabels->chars.at(3));

                } else {

                    button(i)->setSecondaryLabelRow2(QString());

                }

            }

        }

        updateButtonLabels();

    }

}

DialpadNumericButton* DialpadNumericButtonGrid::button(int i) const

{

    return static_cast<DialpadNumericButton*>(HbInputButtonGroup::button(i));

}

void DialpadNumericButtonGrid::updateButtonLabels()

{

    // update numeric buttons according to button state (pressed/released)

    updateIconColor();

    updateTextLayouts(rect().size());

    update();

}

void DialpadNumericButtonGrid::paint(

    QPainter* painter,

    const QStyleOptionGraphicsItem* option,

    QWidget* widget)

{

    Q_UNUSED(option);

    Q_UNUSED(widget);

    // Paints empty buttons

    HbInputButtonGroup::paint(painter,option,widget);

    qreal cellWidth = boundingRect().width() / gridSize().width();

    qreal cellHeight = boundingRect().height() / gridSize().height();

    for (int i = 0; i < DialpadRowCount * DialpadColumnCount; i++) {

        DialpadNumericButton *item = button(i);

        if (!item->icon().isNull()) {

            // same as secondary text

            qreal x = (item->position().x() * cellWidth) +

                      (DialpadPrimaryTextLeftMargin * mUnit) +

                      (DialpadPrimarySecondaryMargin * mUnit) +

                      mMaxPrimaryLineWidth;

            // top align with some margin

            qreal y = item->position().y() * cellHeight + (cellHeight / 20.0);

            qreal width = item->icon().size().width();

            qreal height = item->icon().size().height();

            Qt::Alignment alignment =

                static_cast<Qt::Alignment>(Qt::AlignTop | Qt::AlignLeft);

            item->icon().paint(painter,

                               QRectF(x,y,width,height),

                               Qt::KeepAspectRatio,

                               alignment);

        }                      

    }

    // Draw texts

    QPen origPen = painter->pen();

    for (int i = 0; i < mTextLayouts.count(); ++i) {

        if (i==SecondaryText) {

            // dimmed in normal state

            painter->setPen(mColors.at(Pressed+1));

        } else {

            // otherwise normal or pressed color

            painter->setPen(mColors.at(i/TextTypeCount));

        }

        mTextLayouts.at(i)->draw(painter, QPointF(0, 0));

    }

    painter->setPen(origPen);

}

void DialpadNumericButtonGrid::updateColorArray()

{

    mColors.clear();

    QColor normalColor = HbColorScheme::color("qtc_input_button_normal");

    mColors.insert(Normal, normalColor);

    QColor pressedColor = HbColorScheme::color("qtc_input_button_pressed");

    mColors.insert(Pressed, pressedColor);

    // this is used for alphabets shown dimmed, use alpha until exact color

    // is specified

    QColor disabledColor = HbColorScheme::color("qtc_input_button_normal");

    mColors.insert(Pressed+1, disabledColor);

}

void DialpadNumericButtonGrid::updateIconColor()

{

    for (int i = 0; i < (DialpadRowCount * DialpadColumnCount); i++) {

        DialpadNumericButton *item = button(i);

        if (item->state()==HbInputButton::ButtonStatePressed) {

            item->icon().setColor(mColors.at(Pressed));

        } else {

            item->icon().setColor(mColors.at(Normal));

        }

    }

}

void DialpadNumericButtonGrid::cancelButtonPress()

{

    HbInputButtonGroup::cancelButtonPress();

    updateButtonLabels();

}

void DialpadNumericButtonGrid::setGeometry(const QRectF &rect)

{

    HbInputButtonGroup::setGeometry(rect);

    mUnit = HbDeviceProfile::profile(&mMainWindow).unitValue();

    updateTextLayouts(rect.size());

    updateIconSizes();

}

void DialpadNumericButtonGrid::updateIconSizes()

{

    qreal width =  mMainWindow.orientation() == Qt::Vertical ?

                   DialpadIconSizeV : DialpadIconSizeH;

    width *= mUnit;

    for (int i = 0; i < DialpadRowCount * DialpadColumnCount; i++) {

        DialpadNumericButton *item = button(i);

        if (!item->icon().isNull()) {

            item->icon().setWidth(width);

        }

    }

}

void DialpadNumericButtonGrid::changeEvent(QEvent *event)

{

    HbInputButtonGroup::changeEvent(event);

    if (event->type() == HbEvent::ThemeChanged) {

        updateColorArray();

        updateIconColor();

    }

}

void DialpadNumericButtonGrid::updateTextLayouts(const QSizeF &size)

{

    if (!size.width() && !size.height()) {

        return;

    }

    // get normal and pressed state texts

    QList<QString> textContent;

    bool useTwoRows;

    resolveTextContent(textContent, useTwoRows);

    // layout the texts

    createTextLayouts(size, textContent, useTwoRows);

}

void DialpadNumericButtonGrid::resolveTextContent(

    QList<QString> &content, bool& useTwoRows)

{

    QString normalState;

    QString normalStateSecondary;

    QString pressedState;

    QString pressedStateSecondary;

    useTwoRows = false;

    for (int i = 0; i < (DialpadRowCount*DialpadColumnCount); i++) {

        DialpadNumericButton *item = button(i);

        if (item->state()==HbInputButton::ButtonStatePressed) {

            if (item->primaryLabel().length()) {

                pressedState.append(item->primaryLabel());

                pressedState.append(QChar(QChar::LineSeparator));

            }

            if (item->secondaryLabel().length()) {

                pressedStateSecondary.append(item->secondaryLabel());

                pressedStateSecondary.append(QChar(QChar::LineSeparator));

                if (item->secondaryLabelRow2().length()) {

                    pressedStateSecondary.append(item->secondaryLabelRow2());

                    pressedStateSecondary.append(QChar(QChar::LineSeparator));

                    useTwoRows = true;

                }

            }

        } else { // ButtonStateNormal

            if (item->primaryLabel().length()) {

                normalState.append(item->primaryLabel());

                normalState.append(QChar(QChar::LineSeparator));

            }

            if (item->secondaryLabel().length()) {

                normalStateSecondary.append(item->secondaryLabel());

                normalStateSecondary.append(QChar(QChar::LineSeparator));

                if (item->secondaryLabelRow2().length()) {

                    normalStateSecondary.append(item->secondaryLabelRow2());

                    normalStateSecondary.append(QChar(QChar::LineSeparator));

                    useTwoRows = true;

                }

            }

        }

    }

    content.insert(PrimaryText, normalState);

    content.insert(SecondaryText, normalStateSecondary);

    content.insert(TextTypeCount + Pressed, pressedState);

    content.insert(StateCount + SecondaryText, pressedStateSecondary);

}

void DialpadNumericButtonGrid::createTextLayouts(

    const QSizeF &size, const QList<QString> &content, bool useTwoRows)

{

    // clear old layouts

    qDeleteAll(mTextLayouts);

    mTextLayouts.clear();

    if(!isButtonPressed()) {

        mMaxPrimaryLineWidth = 0;

    }

    QFont primaryFont = HbFontSpec(HbFontSpec::Primary).font();

    qreal primarySize = mMainWindow.orientation() == Qt::Vertical ?

                     DialpadPrimaryTextSizeV :

                     DialpadPrimaryTextSizeH;

    primaryFont.setPixelSize(primarySize * mUnit);

    QFont secondaryFont = HbFontSpec(HbFontSpec::Secondary).font();

    if (useTwoRows) {

        qreal secondarySize = mMainWindow.orientation() == Qt::Vertical ?

                         DialpadSecondaryTextSize2RowsV :

                         DialpadSecondaryTextSize2RowsH;

        secondaryFont.setPixelSize(secondarySize * mUnit);

    } else {

        qreal secondarySize = mMainWindow.orientation() == Qt::Vertical ?

                         DialpadSecondaryTextSizeV :

                         DialpadSecondaryTextSizeH;

        secondaryFont.setPixelSize(secondarySize * mUnit);

    }

    for (int i=0; i < (StateCount*TextTypeCount); i++ ) {

        QString text = content.at(i);

        if (!text.isNull()) {

            QTextLayout* textLayout;

            int type;

            if (i%TextTypeCount) {

                textLayout = new QTextLayout(text,secondaryFont);

                type = SecondaryText;

            } else {

                textLayout = new QTextLayout(text,primaryFont);

                type = PrimaryText;

            }

            mTextLayouts.append(textLayout);

            textLayout->beginLayout();

            int state = (i>=TextTypeCount) ? Pressed : Normal;

            layoutTextLines(size,*textLayout,state,type,useTwoRows);

            textLayout->endLayout();

            textLayout->setCacheEnabled(true);

        }

    }

}

void DialpadNumericButtonGrid::layoutTextLines(

    const QSizeF &size,

    QTextLayout &textLayout,

    int state,

    int type,

    bool useTwoRows)

{

    QFontMetricsF fontMetrics(textLayout.font());

    qreal textHeight = fontMetrics.height();

    qreal textDescent = fontMetrics.descent();

    qreal cellWidth = size.width() / gridSize().width();

    qreal cellHeight = size.height() / gridSize().height();

    qreal maxLineWidth = 0;

    for (int j = 0; j < (DialpadRowCount*DialpadColumnCount); j++) {

        DialpadNumericButton *item = button(j);

        if ((type==PrimaryText && item->primaryLabel().isNull()) ||

            (type==SecondaryText && item->secondaryLabel().isNull())) {

            continue; // no text for this button -> next button

        }

        if ( ( state==Normal &&

               item->state()==HbInputButton::ButtonStateReleased ) ||

             ( state==Pressed &&

               item->state()==HbInputButton::ButtonStatePressed ) ) {

            // layout text line

            if (type==SecondaryText) {

                layoutSecondaryText(textLayout,*item,cellWidth,

                                    cellHeight,textHeight,textDescent,

                                    useTwoRows);

            } else {

                layoutPrimaryText(textLayout,*item,cellWidth,

                                  cellHeight,textHeight);

                // store line width, for drawing secondary text

                qreal lineWidth = fontMetrics.width(item->primaryLabel());

                if (mMaxPrimaryLineWidth == 0 && (j>0 && j<10) &&

                    lineWidth > maxLineWidth) {

                    maxLineWidth = lineWidth;

                    mPrimaryTextBaseline = textHeight/2 - textDescent;

                }

            }

        }

    }

    if (maxLineWidth!=0) {

        mMaxPrimaryLineWidth = maxLineWidth;

    }

}

void DialpadNumericButtonGrid::layoutPrimaryText(

    QTextLayout& layout,

    DialpadNumericButton& button,

    qreal cellWidth,

    qreal cellHeight,

    qreal textHeight) const

{

    QTextLine line = layout.createLine();

    line.setNumColumns(button.primaryLabel().length());

    qreal textPositionX = (button.position().x() * cellWidth) +