#include <QApplication>
#include <QPlainTextEdit>
#include <QWidget>
#include <QGridLayout>

class TestEdit : public QWidget
{
  Q_OBJECT

public:

  TestEdit()
  {
    input = new QPlainTextEdit();
    mirror = new QPlainTextEdit();
    output = new QPlainTextEdit();
    mirror->setReadOnly(true);
    output->setReadOnly(true);
    QGridLayout* layout = new QGridLayout();
    setLayout(layout);
	layout->addWidget(input, 0, 0, 1, 1);
	layout->addWidget(mirror, 0, 1, 1, 1);
	layout->addWidget(output, 1, 0, 1, 2);
    connect(input->document(), SIGNAL(contentsChange(int, int, int)), this, SLOT(TextChangedDoc(int, int, int)));
    resize(800,800);
  }

private slots:

  void TextChangedDoc(int pos, int removed, int added);

private:

  QPlainTextEdit* input;
  QPlainTextEdit* mirror;
  QPlainTextEdit* output;
};

void TestEdit::TextChangedDoc(int pos, int removed, int added)
{
  mirror->setPlainText(input->toPlainText());
  output->appendPlainText(QString("contentsChange pos = %1, removed = %2, added = %3").arg(pos).arg(removed).arg(added));
}

int main(int argc, char **argv)
{
 QApplication app (argc, argv);

 TestEdit window;

 window.show();

 return app.exec();
}

#include "ime.moc"