imagesettings.cpp Example File

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  #include "imagesettings.h"
  #include "ui_imagesettings.h"

  #include <QComboBox>
  #include <QDebug>
  #include <QCameraImageCapture>
  #include <QMediaService>

  ImageSettings::ImageSettings(QCameraImageCapture *imageCapture, QWidget *parent) :
      QDialog(parent),
      ui(new Ui::ImageSettingsUi),
      imagecapture(imageCapture)
  {
      ui->setupUi(this);

      //image codecs
      ui->imageCodecBox->addItem(tr("Default image format"), QVariant(QString()));
      foreach(const QString &codecName, imagecapture->supportedImageCodecs()) {
          QString description = imagecapture->imageCodecDescription(codecName);
          ui->imageCodecBox->addItem(codecName+": "+description, QVariant(codecName));
      }

      ui->imageQualitySlider->setRange(0, int(QMultimedia::VeryHighQuality));

      ui->imageResolutionBox->addItem(tr("Default Resolution"));
      QList<QSize> supportedResolutions = imagecapture->supportedResolutions();
      foreach(const QSize &resolution, supportedResolutions) {
          ui->imageResolutionBox->addItem(QString("%1x%2").arg(resolution.width()).arg(resolution.height()),
                                          QVariant(resolution));
      }
  }

  ImageSettings::~ImageSettings()
  {
      delete ui;
  }

  void ImageSettings::changeEvent(QEvent *e)
  {
      QDialog::changeEvent(e);
      switch (e->type()) {
      case QEvent::LanguageChange:
          ui->retranslateUi(this);
          break;
      default:
          break;
      }
  }

  QImageEncoderSettings ImageSettings::imageSettings() const
  {
      QImageEncoderSettings settings = imagecapture->encodingSettings();
      settings.setCodec(boxValue(ui->imageCodecBox).toString());
      settings.setQuality(QMultimedia::EncodingQuality(ui->imageQualitySlider->value()));
      settings.setResolution(boxValue(ui->imageResolutionBox).toSize());

      return settings;
  }

  void ImageSettings::setImageSettings(const QImageEncoderSettings &imageSettings)
  {
      selectComboBoxItem(ui->imageCodecBox, QVariant(imageSettings.codec()));
      selectComboBoxItem(ui->imageResolutionBox, QVariant(imageSettings.resolution()));
      ui->imageQualitySlider->setValue(imageSettings.quality());
  }

  QVariant ImageSettings::boxValue(const QComboBox *box) const
  {
      int idx = box->currentIndex();
      if (idx == -1)
          return QVariant();

      return box->itemData(idx);
  }

  void ImageSettings::selectComboBoxItem(QComboBox *box, const QVariant &value)
  {
      for (int i = 0; i < box->count(); ++i) {
          if (box->itemData(i) == value) {
              box->setCurrentIndex(i);
              break;
          }
      }
  }