/*!

* 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: Dialpad keypad

*

*/

#include <QtGui>

#include <hbinstance.h>

#include <hbinputkeymapfactory.h>

#include <hbinputkeymap.h>

#include <hbinpututils.h>

#include <hbinputsettingproxy.h>

#include <hbinputlanguage.h>

#include <hbapplication.h>

#include <hblineedit.h>

#include "dialpadkeypad.h"

#include "dialpadbuttonstyle.h"

#include "dialpadbutton.h"

#include "dialpadinputfield.h"

static const int DialpadRowCount = 5;

static const int DialpadColumnCount = 3;

static const int DialpadButtonToKeyCodeTable[DialpadButtonCount] =

{

    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,

                      Qt::Key_Yes

    // Qt::Key_BackSpace is in input field

};

DialpadKeypad::DialpadKeypad(

    DialpadInputField& inputField,

    QGraphicsItem* parent) :

    HbWidget(parent), mInputField(inputField),

    mLongPressDuration(0)

{

    // create signal mappers

    mKeyPressedSignalMapper = new QSignalMapper(this);

    connect(mKeyPressedSignalMapper,SIGNAL(mapped(int)),

            SLOT(handleKeyPressed(int)));

    mKeyClickedSignalMapper = new QSignalMapper(this);

    connect(mKeyClickedSignalMapper,SIGNAL(mapped(int)),

            SLOT(handleKeyClicked(int)));

    mKeyReleasedSignalMapper = new QSignalMapper(this);

    connect(mKeyReleasedSignalMapper,SIGNAL(mapped(int)),

            SLOT(handleKeyReleased(int)));

    connect(&mInputField.backspaceButton(),SIGNAL(clicked()),

            mKeyClickedSignalMapper,SLOT(map()));

    mKeyClickedSignalMapper->setMapping(&mInputField.backspaceButton(),

                                        Qt::Key_Backspace);

    // create keypad

    mNormalButtonStyle = new DialpadButtonStyle();

    mCallButtonStyle = new DialpadButtonStyle();

    mCallButtonStyle->setButtonStyle(DialpadButtonStyle::CallButtonStyle);

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

        int keyCode = DialpadButtonToKeyCodeTable[i];

        DialpadButton* button = new DialpadButton(this);

        mButtons[i] = button;

        button->setStretched(true);

        button->setFocusPolicy(Qt::NoFocus);

        button->setFlag(QGraphicsItem::ItemIsFocusable,false);

        QString buttonName;

        buttonName.setNum(keyCode);

        button->setObjectName(buttonName);

        if (keyCode==Qt::Key_Yes) {

            button->setStyle(mCallButtonStyle);

            HbIcon callIcon(":/qtg_mono_answer_call.svg"); // todo correct icon

            button->setIcon(callIcon);

        } else {

            button->setStyle(mNormalButtonStyle);

        }

        if (keyCode==Qt::Key_1) {

            HbIcon mboxIcon(":/qtg_mono_voice_mailbox.svg");

            button->setIcon(mboxIcon);

        }

        // for Yes-key clicked() signal is enough

        if (keyCode!=Qt::Key_Yes) {

            connect(button,SIGNAL(pressed()),

                    mKeyPressedSignalMapper,SLOT(map()));

            mKeyPressedSignalMapper->setMapping(button,keyCode);

            connect(button,SIGNAL(released()),

                    mKeyReleasedSignalMapper,SLOT(map()));

            mKeyReleasedSignalMapper->setMapping(button,keyCode);

        }

        connect(button,SIGNAL(clicked()),mKeyClickedSignalMapper,SLOT(map()));

        mKeyClickedSignalMapper->setMapping(button,keyCode);

    }

    // set button texts

    setButtonTexts();

    // update button texts when input language is changed

    connect(HbInputSettingProxy::instance(),

            SIGNAL(globalInputLanguageChanged(HbInputLanguage)),

            this,SLOT(setButtonTexts()));

    createButtonGrid();

    // timer to handle long press

    mLongPressTimer = new QTimer(this);

    mLongPressTimer->setSingleShot(true);

    connect(mLongPressTimer,SIGNAL(timeout()),SLOT(handleLongPress()));

}

DialpadKeypad::~DialpadKeypad()

{

    delete mCallButtonStyle;

    delete mNormalButtonStyle;

}

void DialpadKeypad::createButtonGrid()

{

    // button grid

    mGridLayout = new QGraphicsGridLayout;

    // 12 numeric buttons

    int i=0;

    for (int row = 0; row < DialpadRowCount-1; row++) {

        for (int col = 0; col < DialpadColumnCount; col++) {

           mGridLayout->addItem(mButtons[i],row,col);

           i++;

        }

    }

    // call button take the last row

    mGridLayout->addItem(mButtons[12],4,0,1,3);

    mGridLayout->setSpacing(0);

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

    setLayout(mGridLayout);

}

void DialpadKeypad::setButtonTexts()

{

    HbInputLanguage inputLanguage =

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

    const HbKeymap *keymap =

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

    mGeneratedChar.clear();

    if (keymap) {

        for (int i = 0; i < DialpadButtonCount-1; i++) {

            int keyCode = DialpadButtonToKeyCodeTable[i];

            if (keyCode == Qt::Key_Asterisk) {

                // asterisk is not localized

                QChar asterisk('*');

                mButtons[i]->setText(asterisk);

                mButtons[i]->setAdditionalText("+");

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

                continue;

            }

            if (keyCode == Qt::Key_NumberSign) {

                // number sign is not localized

                QChar numberSign('#');

                mButtons[i]->setText(numberSign);

                mButtons[i]->setAdditionalText(" ");

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

                continue;

            }

            int index = i;

            if (keyCode==Qt::Key_0) {

                index = i-1;

            }

            const HbMappedKey *key =

                keymap->keyForIndex(HbKeyboardVirtual12Key, index);

            if (key) {

                QChar numberChar =

                    HbInputUtils::findFirstNumberCharacterBoundToKey(

                        key,

                        inputLanguage.language());

                // button text

                mButtons[i]->setText(numberChar);

                mGeneratedChar.insert(keyCode,numberChar);

                // additional text (letters)

                int numberOfCharacters;

                if (keyCode==Qt::Key_7 || keyCode == Qt::Key_9) {

                    numberOfCharacters = 4;

                } else if (keyCode==Qt::Key_0||keyCode==Qt::Key_1) {

                    numberOfCharacters = 0;

                } else {

                    numberOfCharacters = 3;

                }

                QString characters = key->characters(HbModifierNone);

                if (numberOfCharacters==0 && keyCode!=Qt::Key_1) {

                    mButtons[i]->setAdditionalText(" ");

                } else {

                    mButtons[i]->setAdditionalText(

                        characters.left(numberOfCharacters));

                }

            }

        }

    }

}

void DialpadKeypad::handleKeyPressed(int key)

{

    // Editor is updated on key release (clicked()) or on long press,

    // to prevent editor being updated during swipe.

    mPressedNumericKey = key;

    mLongPressTimer->start(mLongPressDuration);

    postKeyEvent(QEvent::KeyPress, key);

}

void DialpadKeypad::handleKeyClicked(int key)

{

    if (!isNumericKey(key)) {

        postKeyEvent(QEvent::KeyPress, key);

        postKeyEvent(QEvent::KeyRelease, key);

    } else if (mPressedNumericKey) {

        // update editor: generate key press event.

        sendKeyEventToEditor(QEvent::KeyPress, key);

    }

}

void DialpadKeypad::handleKeyReleased(int key)

{

    mLongPressTimer->stop();

    postKeyEvent(QEvent::KeyRelease, key);

}

void DialpadKeypad::postKeyEvent(QEvent::Type type, int key)

{

    QKeyEvent *keyEvent = new QKeyEvent(type, key, Qt::NoModifier);

    HbApplication::postEvent(hbInstance->allMainWindows().at(0),keyEvent);

}

void DialpadKeypad::sendKeyEventToEditor(QEvent::Type type, int key)

{

    QKeyEvent keyEvent(type, key, Qt::NoModifier, mGeneratedChar.value(key));

    HbApplication::sendEvent(&mInputField.editor(), &keyEvent);

}

void DialpadKeypad::handleLongPress()

{

    // key press

    sendKeyEventToEditor(QEvent::KeyPress, mPressedNumericKey);

    mPressedNumericKey = 0;

}

bool DialpadKeypad::isNumericKey(int key)

{

    if (key==Qt::Key_Yes || key==Qt::Key_Backspace) {

        return false;

    } else {

        return true;

    }

}

void DialpadKeypad::setLongPressDuration(int duration)

{

    mLongPressDuration = duration;

}

void DialpadKeypad::setCallButtonEnabled(bool enabled)

{

    mButtons[DialpadButtonCount-1]->setEnabled(enabled);

}

void DialpadKeypad::showEvent(QShowEvent *event)

{

    HbWidget::showEvent(event);

    // set fixed row and column dimensions

    QSizeF effectiveSize(rect().width(),

                         rect().height());

    qreal width = effectiveSize.width() / DialpadColumnCount;

    qreal height = effectiveSize.height() / DialpadRowCount;

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

        mGridLayout->setColumnFixedWidth(i, width);

    }

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

        mGridLayout->setRowFixedHeight(i, height);

    }

}