previewform.cpp Example File

tools/codecs/previewform.cpp

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  ** This file is part of the examples of the Qt Toolkit.
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  #include <QtWidgets>

  #include "previewform.h"

  PreviewForm::PreviewForm(QWidget *parent)
      : QDialog(parent)
  {
      encodingComboBox = new QComboBox;

      encodingLabel = new QLabel(tr("&Encoding:"));
      encodingLabel->setBuddy(encodingComboBox);

      textEdit = new QTextEdit;
      textEdit->setLineWrapMode(QTextEdit::NoWrap);
      textEdit->setReadOnly(true);

      buttonBox = new QDialogButtonBox(QDialogButtonBox::Ok
                                      | QDialogButtonBox::Cancel);

      connect(encodingComboBox, SIGNAL(activated(int)),
              this, SLOT(updateTextEdit()));
      connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
      connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));

      QGridLayout *mainLayout = new QGridLayout;
      mainLayout->addWidget(encodingLabel, 0, 0);
      mainLayout->addWidget(encodingComboBox, 0, 1);
      mainLayout->addWidget(textEdit, 1, 0, 1, 2);
      mainLayout->addWidget(buttonBox, 2, 0, 1, 2);
      setLayout(mainLayout);

      setWindowTitle(tr("Choose Encoding"));
      resize(400, 300);
  }

  void PreviewForm::setCodecList(const QList<QTextCodec *> &list)
  {
      encodingComboBox->clear();
      foreach (QTextCodec *codec, list)
          encodingComboBox->addItem(codec->name(), codec->mibEnum());
  }

  void PreviewForm::setEncodedData(const QByteArray &data)
  {
      encodedData = data;
      updateTextEdit();
  }

  void PreviewForm::updateTextEdit()
  {
      int mib = encodingComboBox->itemData(
                        encodingComboBox->currentIndex()).toInt();
      QTextCodec *codec = QTextCodec::codecForMib(mib);

      QTextStream in(&encodedData);
      in.setAutoDetectUnicode(false);
      in.setCodec(codec);
      decodedStr = in.readAll();

      textEdit->setPlainText(decodedStr);
  }