/*

* Copyright (c) 2010 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:

*   Private implementation for CxuiCaptureKeyHandler

*/

#include <QVariant>

#include <QKeyEvent>

#include "cxuicapturekeyhandler_symbian_p.h"

#include "cxuicapturekeyhandler.h"

#include "cxutils.h"

#include "cxeengine.h"

#include "cxenamespace.h"

#include "cxefeaturemanager.h"

#include <w32std.h>

#include <eikon.hrh>

#include <coemain.h>

#include <e32keys.h> // for EKeyCamera

namespace {

    const int CXUI_KEY_PRIORITY = 100;

    const int CXUI_CAPTURE_KEY_CODE1 = 0xab;

    const int CXUI_CAPTURE_KEY_CODE2 = 0xf849;

    const int CXUI_AUTOFOCUS_KEY_CODE1 = 0xe2;

    const int CXUI_AUTOFOCUS_KEY_CODE2 = 0xf880;

}

CxuiCaptureKeyHandlerPrivate::CxuiCaptureKeyHandlerPrivate(CxeEngine &aEngine, CxuiCaptureKeyHandler *parent) :

    q_ptr(parent),

    mEngine(aEngine),

    mAutofocusKeyPressed(false),

    mCaptureKeyPressed(false),

    mWsSession(CCoeEnv::Static()->WsSession()),

    mWindowGroup(CCoeEnv::Static()->RootWin())

{

    CX_DEBUG_ENTER_FUNCTION();

    // key codes hardcoded for now

    // Autofocus key

    mPrimaryCameraAutofocusKeys.append(CXUI_AUTOFOCUS_KEY_CODE1);

    mPrimaryCameraAutofocusKeys.append(CXUI_AUTOFOCUS_KEY_CODE2);

    // Capture keys for primary camera

    mPrimaryCameraCaptureKeys.append(CXUI_CAPTURE_KEY_CODE1);

    mPrimaryCameraCaptureKeys.append(CXUI_CAPTURE_KEY_CODE2);

    startListeningKeys();

    CX_DEBUG_EXIT_FUNCTION();

}

CxuiCaptureKeyHandlerPrivate::~CxuiCaptureKeyHandlerPrivate()

{

    CX_DEBUG_ENTER_FUNCTION();

    stopListeningKeys();

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Starts listening key events.

*/

void CxuiCaptureKeyHandlerPrivate::startListeningKeys()

{

    CX_DEBUG_ENTER_FUNCTION();

    // Protect from multiple calls

    if (mCapturedKeyUpDownHandles.empty() && mCapturedKeyHandles.empty()) {

        int key(0);

        foreach (key, mPrimaryCameraAutofocusKeys) {

            CX_DEBUG(("CxuiCaptureKeyHandlerPrivate - hooking autofocus key with scan / key code: %d", key));

            listenKey(key);

        }

        foreach (key, mPrimaryCameraCaptureKeys) {

            CX_DEBUG(("CxuiCaptureKeyHandlerPrivate - hooking capture key with scan / key code: %d", key));

            listenKey(key);

        }

    }

    CX_DEBUG_EXIT_FUNCTION();

}

/*!

* Stops listening key events.

*/

void CxuiCaptureKeyHandlerPrivate::stopListeningKeys()

{

    CX_DEBUG_ENTER_FUNCTION();

    int handle(0);

    foreach (handle, mCapturedKeyUpDownHandles) {

        mWindowGroup.CancelCaptureKeyUpAndDowns(handle);

    }

    mCapturedKeyUpDownHandles.clear();

    foreach (handle, mCapturedKeyHandles) {

        mWindowGroup.CancelCaptureKey(handle);

    }

    mCapturedKeyHandles.clear();

    CX_DEBUG_EXIT_FUNCTION();

}

bool CxuiCaptureKeyHandlerPrivate::isAutofocusKeyPressed()

{

    return mAutofocusKeyPressed;

}

bool CxuiCaptureKeyHandlerPrivate::isCaptureKeyPressed()

{

    return mCaptureKeyPressed;

}

bool CxuiCaptureKeyHandlerPrivate::handleKeyEvent(QEvent *event)

{

    CX_DEBUG_ENTER_FUNCTION();

    Q_Q(CxuiCaptureKeyHandler);

    bool eventWasConsumed = false;

    if (event->type() == QEvent::KeyPress) {

        QKeyEvent *keyEvent = static_cast<QKeyEvent*> (event);

        if ( mPrimaryCameraAutofocusKeys.contains(keyEvent->nativeScanCode())

            && !mAutofocusKeyPressed ) {

            mAutofocusKeyPressed = true;

            eventWasConsumed = true;

            emit q->autofocusKeyPressed();

        } else if (mPrimaryCameraCaptureKeys.contains(keyEvent->nativeScanCode())

            && !mCaptureKeyPressed) {

            mCaptureKeyPressed = true;

            eventWasConsumed = true;

            emit q->captureKeyPressed();

        }

    } else if (event->type() == QEvent::KeyRelease) {

        QKeyEvent *keyEvent = static_cast<QKeyEvent*> (event);

        if ( mPrimaryCameraAutofocusKeys.contains(keyEvent->nativeScanCode())

            && mAutofocusKeyPressed ) {

            mAutofocusKeyPressed = false;

            eventWasConsumed = true;

            emit q->autofocusKeyReleased();

        } else if (mPrimaryCameraCaptureKeys.contains(keyEvent->nativeScanCode())

            && mCaptureKeyPressed) {

            mCaptureKeyPressed = false;

            eventWasConsumed = true;

            emit q->captureKeyReleased();

        }

    }

    CX_DEBUG_EXIT_FUNCTION();

    return eventWasConsumed;

}

/*!

* Helper method to listen to given key (key code or scan code).

* We need to listen to both "key up", "key down" and "key pressed" events to

* get all the necessary events to handleKeyEvent(). If we e.g. just listen

* to up/down events, the way native events are translated to QKeyEvents,

* we only get QEvent::KeyRelease event when partially in background.

* @param key Keycode or scancode for the key to listen. Both should be listened.

*/

void CxuiCaptureKeyHandlerPrivate::listenKey(int key)

{

    // Capture key down and up events

    int handle = mWindowGroup.CaptureKeyUpAndDowns(key, 0, 0, CXUI_KEY_PRIORITY);

    // Handle < 0 means error.

    if (handle >= 0) {

        mCapturedKeyUpDownHandles.append(handle);

    } else {

        CX_DEBUG(("[WARNING] CxuiCaptureKeyHandlerPrivate - Problem hooking to key-up/key-down with code: %d", key));

    }

    // Capture key press events

    handle = mWindowGroup.CaptureKey(key, 0, 0, CXUI_KEY_PRIORITY);

    if (handle >= 0) {

        mCapturedKeyHandles.append(handle);

    } else {

        CX_DEBUG(("[WARNING] CxuiCaptureKeyHandlerPrivate - Problem hooking to key-press with code: %d", key));

    }

}

// end of file