bitratebox.cpp Example File

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  ** Copyright (C) 2017 Andre Hartmann <aha_1980@gmx.de>
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  #include "bitratebox.h"

  #include <QLineEdit>

  BitRateBox::BitRateBox(QWidget *parent) :
      QComboBox(parent),
      m_customSpeedValidator(new QIntValidator(0, 1000000, this))
  {
      fillBitRates();

      connect(this, static_cast<void (QComboBox::*)(int)>(&QComboBox::currentIndexChanged),
              this, &BitRateBox::checkCustomSpeedPolicy);
  }

  BitRateBox::~BitRateBox()
  {
      delete m_customSpeedValidator;
  }

  int BitRateBox::bitRate() const
  {
      if (currentIndex() == (count() - 1))
          return currentText().toInt();

      return itemData(currentIndex()).toInt();
  }

  bool BitRateBox::isFlexibleDataRateEnabled() const
  {
      return m_isFlexibleDataRateEnabled;
  }

  void BitRateBox::setFlexibleDateRateEnabled(bool enabled)
  {
      m_isFlexibleDataRateEnabled = enabled;
      m_customSpeedValidator->setTop(enabled ? 10000000 : 1000000);
      fillBitRates();
  }

  void BitRateBox::checkCustomSpeedPolicy(int idx)
  {
      const bool isCustomSpeed = !itemData(idx).isValid();
      setEditable(isCustomSpeed);
      if (isCustomSpeed) {
          clearEditText();
          lineEdit()->setValidator(m_customSpeedValidator);
      }
  }

  void BitRateBox::fillBitRates()
  {
      const QList<int> rates = {
          10000, 20000, 50000, 100000, 125000, 250000, 500000, 800000, 1000000
      };
      const QList<int> dataRates = {
          2000000, 4000000, 8000000
      };

      clear();

      for (int rate : rates)
          addItem(QString::number(rate), rate);

      if (isFlexibleDataRateEnabled()) {
          for (int rate : dataRates)
              addItem(QString::number(rate), rate);
      }

      addItem(tr("Custom"));
      setCurrentIndex(6); // default is 500000 bits/sec
  }