Kwave::BitrateSpinBox Class Reference

#include <BitrateSpinBox.h>

Inheritance diagram for Kwave::BitrateSpinBox:

Collaboration diagram for Kwave::BitrateSpinBox:

Public Slots
virtual void	snapIn (int value)

Signals
void	snappedIn (int bitrate)

Public Member Functions
	BitrateSpinBox (QWidget *parent)
virtual	~BitrateSpinBox ()
virtual void	allowRates (const QList< int > &list)

Protected Member Functions
int	nearestIndex (int rate)

Private Attributes
QList< int >	m_rates

Detailed Description

Definition at line 30 of file BitrateSpinBox.h.

Constructor & Destructor Documentation

BitrateSpinBox()

Kwave::BitrateSpinBox::BitrateSpinBox ( QWidget *  parent )

explicit

Constructor

Definition at line 27 of file BitrateSpinBox.cpp.

References Kwave::connect(), m_rates, and snapIn().

    :QSpinBox(parent), m_rates()
{
    m_rates.append(0); // don't let it stay empty, that makes life easier

    connect(this, SIGNAL(valueChanged(int)),
            this, SLOT(snapIn(int)));
}

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~BitrateSpinBox()

Kwave::BitrateSpinBox::~BitrateSpinBox ( )

virtual

Destructor

Definition at line 37 of file BitrateSpinBox.cpp.

{
}

Member Function Documentation

allowRates()

void Kwave::BitrateSpinBox::allowRates ( const QList< int > &  list )

virtual

sets a list of allowed bitrates

Definition at line 64 of file BitrateSpinBox.cpp.

References m_rates.

{
    int old_value = value();

    m_rates = list;
    if (m_rates.isEmpty()) m_rates.append(0);

    // set new ranges
    setMinimum(m_rates.first());
    setMaximum(m_rates.last());

    setValue(old_value);
}

nearestIndex()

int Kwave::BitrateSpinBox::nearestIndex ( int  rate )

protected

find the nearest bitrate index of a current position

Definition at line 79 of file BitrateSpinBox.cpp.

References m_rates, and Kwave::toInt().

Referenced by snapIn().

{
    // find the nearest value
    int nearest = 0;
    foreach(int i, m_rates)
        if (qAbs(i - rate) < qAbs(nearest - rate)) nearest = i;

    // find the index
    int index = m_rates.contains(nearest) ? m_rates.indexOf(nearest) : 0;

    // limit the index into a reasonable range
    if (index < 0)
        index = 0;
    if (index >= Kwave::toInt(m_rates.size()))
        index = m_rates.size()-1;

    return index;
}

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snapIn

void Kwave::BitrateSpinBox::snapIn ( int  value )

virtualslot

snaps in to a new value

Definition at line 42 of file BitrateSpinBox.cpp.

References m_rates, nearestIndex(), snappedIn(), and Kwave::toInt().

Referenced by BitrateSpinBox().

{
    int index     = nearestIndex(value);
    int old_index = index;
    int old_value = m_rates[index];

    if (value == old_value) return;

    if ((value > old_value) && (index < Kwave::toInt(m_rates.size()) - 1))
        index++;

    if ((value < old_value) && (index > 0))
        index--;

    if (index != old_index) {
        int v = m_rates[index];
        setValue(v);
        emit snappedIn(v);
    }
}

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snappedIn

void Kwave::BitrateSpinBox::snappedIn ( int  bitrate )

signal

emitted when the value changed and snapped in to a bitrate

Referenced by snapIn().

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Member Data Documentation

m_rates

QList<int> Kwave::BitrateSpinBox::m_rates

private

list of allowed bitrates, sorted ascending

Definition at line 61 of file BitrateSpinBox.h.

Referenced by allowRates(), BitrateSpinBox(), nearestIndex(), and snapIn().

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

• plugins/fileinfo/BitrateSpinBox.h
• plugins/fileinfo/BitrateSpinBox.cpp