/*

 * 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:  Day view control of calendar

 *

 */

#include <QPainter>

#include <QPen>

#include "calendaystatusstrip.h"

qreal const CalenDayStatusStrip::mMinute = 60;

qreal const CalenDayStatusStrip::mMinimumTime = 5;

/*!

  Constructor

 */

CalenDayStatusStrip::CalenDayStatusStrip(HbWidget *parent)

    : HbWidget(parent), mRange(2), 

{

    setFlag(QGraphicsItem::ItemHasNoContents,false);

}

/*!

  Destructor

 */

CalenDayStatusStrip::~CalenDayStatusStrip()

{

}

/*!

   \brief Returns range between two filled lines in StripWithLines drawing 

   styles.

   \sa CalenDayStatusStrip::DrawingStyle, setRange

 */

qreal CalenDayStatusStrip::range() const

{

    return mRange;

}

/*!

   \brief Returns style of drawing.

   \sa CalenDayStatusStrip::DrawingStyle, setDrawingStyle

 */

CalenDayStatusStrip::DrawingStyle CalenDayStatusStrip::drawingStyle() const

{

    return mDrawingStyle;

}

/*!

   \brief Returns original start and entime fo event

   \sa setStartEndTime

 */

QPair<QTime,QTime> CalenDayStatusStrip::startEndTime() const

{

    return mStartEndEventTime;

}

/*!

   \brief It sets range between two filled lines in StripWithLines drawing 

   styles.

   \param range Range between two filled lines

   \sa CalenDayStatusStrip::DrawingStyle, range

 */

void CalenDayStatusStrip::setRange(qreal range)

{

    mRange = range;

}

/*!

   \brief It sets drawing style of strip 

   \param drawingStyle Style of strip drawing.

   \sa CalenDayStatusStrip::DrawingStyle, drawingStyle

 */

void 

CalenDayStatusStrip::setDrawingStyle(CalenDayStatusStrip::DrawingStyle drawingStyle)

{

    mDrawingStyle = drawingStyle;

}

/*!

   It sets start and end time of event

   \param startTime Start of event

   \param endTime End of event

 */

void CalenDayStatusStrip::setStartEndTime(const QTime &startTime, 

                                            const QTime &endTime)

{

    mStartEndEventTime.first = startTime;

    mStartEndEventTime.second = endTime;

    //check if startEndEvent is longer than mMinimumTimeminutes;

    if (mStartEndEventTime.first.secsTo(mStartEndEventTime.second) < mMinute * mMinimumTime) {

        mStartEndEventTime.second = QTime(mStartEndEventTime.first.hour(),

            mStartEndEventTime.first.minute() + mMinimumTime);

    }

}

/*!

   \brief Reimplemented function...

   Reimplemented function to draw status strip. 

   It is based on CalenDayStatusStrip::DrawingStyle, range and color

 */

void CalenDayStatusStrip::paint(

    QPainter *painter,

    const QStyleOptionGraphicsItem *option,

    QWidget *widget)

{

    Q_UNUSED(option);

    Q_UNUSED(widget);

    //calculate bubble start and end time of bubble

    QPair<QTime, QTime> startEndEvent = 

        calculateStartEndPostion(mStartEndEventTime.first,

                                 mStartEndEventTime.second

                                );

    //calculate how big is Minute

    qreal minuteHeight = calculateMinuteHeight(startEndEvent.first, 

                                               startEndEvent.second

                                              );

    painter->save();//   saves the painter state.

    //calculate how long is event in minutes

    qreal eventMinutes = 

           mStartEndEventTime.first.secsTo(mStartEndEventTime.second) / mMinute;

    //calculate height and width of status stripe

    qreal dx = size().width() - 1;

    qreal dy = eventMinutes * minuteHeight;

    //calculate time from wehre it should be drawed

    qreal startTime = 

                 startEndEvent.first.secsTo(mStartEndEventTime.first) / mMinute;

    //this is done because bubble can be drawed from half hour

    startTime = startTime > 30 ? startTime - 30 : startTime;

    //calculate status stripe height

    qreal startTimeHeight = startTime * minuteHeight;

    //set bounding rect of drawed area

    QRectF bounding(boundingRect());

    //set size smaller by 1px in each side

    bounding.setRect(bounding.left() + 1, bounding.top() + startTimeHeight, 

                     dx - 1, dy - 1

                    );

    //set clip region

    painter->setClipRect(bounding, Qt::IntersectClip);

    //prepare brush and paint

    painter->setBrush(brush);

    QPen pen;

    pen.setWidth(1);

    pen.setBrush(brush);

    pen.setCapStyle(Qt::RoundCap);

    pen.setJoinStyle(Qt::RoundJoin);

    painter->setPen(pen);

    QPointF startPoint(0, dy + dx);

    switch (mDrawingStyle) {

        case StripWithLines:

            for (int i = 0; startPoint.y() > 0; i++) {

                painter->drawPolygon(diagonalLine(startPoint, dx, 3));

                startPoint.setY(startPoint.y() - 6 - mRange);

            }

        case OnlyFrame:

            painter->setBrush(Qt::NoBrush);

            break;

    }

    //draw rectangle

    painter->drawRect(bounding);

    // restore the painter

    painter->restore();

}

/*!

   \brief It preapres points to draw filled polygon when StripWithLines style is

   on.

 */

QPolygonF 

CalenDayStatusStrip::diagonalLine(QPointF startPoint, qreal dx, qreal dy)

{

    QPolygonF polygon;

    polygon << QPointF(startPoint.x(), startPoint.y());

    polygon << QPointF(startPoint.x(), startPoint.y() - dy);

    polygon << QPointF(startPoint.x() + dx, startPoint.y() - 2 * dy);

    polygon << QPointF(startPoint.x() + dx, startPoint.y() - dy);

    return polygon;

}

/*!

    Returns time for position 0 and height in widget 

    \param startTime Start of event

    \param endTime End of event

    \return Draw region of bubble

  */

 QPair<QTime,QTime> CalenDayStatusStrip::calculateStartEndPostion(

                                                 const QTime &startTime, 

                                                 const QTime &endTime

                                             )

{

    QTime start;

    QTime end;

    if (startTime.minute() < 30) {

        start = QTime(startTime.hour(), 0);

    }

    else {

        start = QTime(startTime.hour(), 30);

    }

    if (endTime.minute() == 0) {

        end = endTime;

    }

    else if (endTime.hour() == 23 and endTime.minute() > 30) {

        end = QTime(endTime.hour(), 59);

    }

    else if (endTime.minute() <= 30) {

        end = QTime(endTime.hour(), 30);

    }

    else {

        end = QTime(endTime.hour() + 1, 0);

    }

    return QPair<QTime, QTime> (start, end);

}

/*!

   Calculates height of one minute from widget height, and start/end time. 

 */

qreal CalenDayStatusStrip::calculateMinuteHeight(const QTime &start, 

                                                   const QTime &end)

{

    qreal min = start.secsTo(end) / mMinute;

    qreal height = size().height();

    return height / min;

}