PieceAvailabilityBar Class Reference

#include <pieceavailabilitybar.h>

Inheritance diagram for PieceAvailabilityBar:

Collaboration diagram for PieceAvailabilityBar:

Public Member Functions
	PieceAvailabilityBar (QWidget *parent)
void	setAvailability (const QVector< int > &avail)
void	clear () override
Public Member Functions inherited from PiecesBar
	PiecesBar (QWidget *parent=nullptr)
void	setTorrent (const BitTorrent::Torrent *torrent)
virtual bool	event (QEvent *e) override

Private Types
using	base = PiecesBar

Private Member Functions
bool	updateImage (QImage &image) override
QString	simpleToolTipText () const override
QVector< float >	intToFloatVector (const QVector< int > &vecin, int reqSize)

Private Attributes
QVector< int >	m_pieces

Additional Inherited Members
Protected Member Functions inherited from PiecesBar
void	enterEvent (QEnterEvent *e) override
void	leaveEvent (QEvent *e) override
void	mouseMoveEvent (QMouseEvent *e) override
void	paintEvent (QPaintEvent *e) override
void	requestImageUpdate ()
QColor	backgroundColor () const
QColor	borderColor () const
QColor	pieceColor () const
QColor	colorBoxBorderColor () const
const QVector< QRgb > &	pieceColors () const
Static Protected Member Functions inherited from PiecesBar
static QRgb	mixTwoColors (QRgb rgb1, QRgb rgb2, float ratio)
Static Protected Attributes inherited from PiecesBar
static constexpr int	borderWidth = 1

Detailed Description

Definition at line 33 of file pieceavailabilitybar.h.

Member Typedef Documentation

base

using PieceAvailabilityBar::base = PiecesBar

private

Definition at line 35 of file pieceavailabilitybar.h.

Constructor & Destructor Documentation

PieceAvailabilityBar()

PieceAvailabilityBar::PieceAvailabilityBar

(

QWidget *

parent

)

Definition at line 36 of file pieceavailabilitybar.cpp.

    : base {parent}
{
}

Member Function Documentation

clear()

void PieceAvailabilityBar::clear ( )

overridevirtual

Reimplemented from PiecesBar.

Definition at line 162 of file pieceavailabilitybar.cpp.

{
    m_pieces.clear();
    base::clear();
}

References PiecesBar::clear(), and m_pieces.

Referenced by PropertiesWidget::clear().

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intToFloatVector()

QVector< float > PieceAvailabilityBar::intToFloatVector ( const QVector< int > &  vecin, int  reqSize  )

private

Definition at line 41 of file pieceavailabilitybar.cpp.

{
    QVector<float> result(reqSize, 0.0);
    if (vecin.isEmpty()) return result;
 
    const float ratio = static_cast<float>(vecin.size()) / reqSize;
 
    const int maxElement = *std::max_element(vecin.begin(), vecin.end());
 
    // std::max because in normalization we don't want divide by 0
    // if maxElement == 0 check will be disabled please enable this line:
    // const int maxElement = std::max(*std::max_element(avail.begin(), avail.end()), 1);
 
    if (maxElement == 0)
        return result;
 
    // simple linear transformation algorithm
    // for example:
    // image.x(0) = pieces.x(0.0 >= x < 1.7)
    // image.x(1) = pieces.x(1.7 >= x < 3.4)
 
    for (int x = 0; x < reqSize; ++x)
    {
        // R - real
        const float fromR = x * ratio;
        const float toR = (x + 1) * ratio;
 
        // C - integer
        int fromC = fromR;// std::floor not needed
        int toC = std::ceil(toR);
        if (toC > vecin.size())
            --toC;
 
        // position in pieces table
        int x2 = fromC;
 
        // little speed up for really big pieces table, 10K+ size
        const int toCMinusOne = toC - 1;
 
        // value in returned vector
        float value = 0;
 
        // case when calculated range is (15.2 >= x < 15.7)
        if (x2 == toCMinusOne)
        {
            if (vecin[x2])
                value += ratio * vecin[x2];
            ++x2;
        }
        // case when (15.2 >= x < 17.8)
        else
        {
            // subcase (15.2 >= x < 16)
            if (x2 != fromR)
            {
                if (vecin[x2])
                    value += (1.0 - (fromR - fromC)) * vecin[x2];
                ++x2;
            }
 
            // subcase (16 >= x < 17)
            for (; x2 < toCMinusOne; ++x2)
                if (vecin[x2])
                    value += vecin[x2];
 
            // subcase (17 >= x < 17.8)
            if (x2 == toCMinusOne)
            {
                if (vecin[x2])
                    value += (1.0 - (toC - toR)) * vecin[x2];
                ++x2;
            }
        }
 
        // normalization <0, 1>
        value /= ratio * maxElement;
 
        // float precision sometimes gives > 1, because it's not possible to store irrational numbers
        value = std::min(value, 1.0f);
 
        result[x] = value;
    }
 
    return result;
}

References anonymous_namespace{preferences.cpp}::value().

Referenced by updateImage().

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setAvailability()

void PieceAvailabilityBar::setAvailability

(

const QVector< int > &

avail

)

Definition at line 155 of file pieceavailabilitybar.cpp.

{
    m_pieces = avail;
 
    requestImageUpdate();
}

References m_pieces, and PiecesBar::requestImageUpdate().

Referenced by PropertiesWidget::loadDynamicData().

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simpleToolTipText()

QString PieceAvailabilityBar::simpleToolTipText ( ) const

overrideprivatevirtual

Implements PiecesBar.

Definition at line 168 of file pieceavailabilitybar.cpp.

{
    const QString borderColor = colorBoxBorderColor().name();
    const QString rowHTML = QString::fromLatin1("<tr><td width=20 bgcolor='%1' style='border: 1px solid \"%2\";'></td><td>%3</td></tr>");
    return QLatin1String("<table cellspacing=4>")
           + rowHTML.arg(backgroundColor().name(), borderColor, tr("Unavailable pieces"))
           + rowHTML.arg(pieceColor().name(), borderColor, tr("Available pieces"))
           + QLatin1String("</table>");
}

References PiecesBar::backgroundColor(), PiecesBar::borderColor(), PiecesBar::colorBoxBorderColor(), and PiecesBar::pieceColor().

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updateImage()

bool PieceAvailabilityBar::updateImage ( QImage &  image )

overrideprivatevirtual

Implements PiecesBar.

Definition at line 127 of file pieceavailabilitybar.cpp.

{
    QImage image2(width() - 2 * borderWidth, 1, QImage::Format_RGB888);
    if (image2.isNull())
    {
        qDebug() << "QImage image2() allocation failed, width():" << width();
        return false;
    }
 
    if (m_pieces.empty())
    {
        image2.fill(backgroundColor());
        image = image2;
        return true;
    }
 
    QVector<float> scaledPieces = intToFloatVector(m_pieces, image2.width());
 
    // filling image
    for (int x = 0; x < scaledPieces.size(); ++x)
    {
        float piecesToValue = scaledPieces.at(x);
        image2.setPixel(x, 0, pieceColors()[piecesToValue * 255]);
    }
    image = image2;
    return true;
}

References PiecesBar::backgroundColor(), PiecesBar::borderWidth, intToFloatVector(), m_pieces, and PiecesBar::pieceColors().

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Member Data Documentation

m_pieces

QVector<int> PieceAvailabilityBar::m_pieces

private

Definition at line 53 of file pieceavailabilitybar.h.

Referenced by clear(), setAvailability(), and updateImage().

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The documentation for this class was generated from the following files:

• src/gui/properties/pieceavailabilitybar.h
• src/gui/properties/pieceavailabilitybar.cpp