qt-creator/doc/example/textfinder/textfinder.cpp

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** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
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#include "textfinder.h"

#include <QtCore/QFile>
#include <QtCore/QTextStream>
#include <QtGui/QMessageBox>

TextFinder::TextFinder(QWidget *parent, Qt::WFlags flags)
    : QWidget(parent, flags)
{
    ui.setupUi(this);
    loadTextFile();
    isFirstTime = true;
}

TextFinder::~TextFinder()
{
}

void TextFinder::loadTextFile()
{
    QFile inputFile(":/input.txt");
    inputFile.open(QIODevice::ReadOnly);

    QTextStream in(&inputFile);
    QString line = in.readAll();
    inputFile.close();

    ui.textEdit->setPlainText(line);
    QTextCursor cursor = ui.textEdit->textCursor();
    cursor.movePosition(QTextCursor::Start, QTextCursor::MoveAnchor, 1);
}

void TextFinder::on_findButton_clicked()
{
    QString searchString = ui.lineEdit->text();
    QTextDocument *document = ui.textEdit->document();

    bool found = false;

    ui.textEdit->find(searchString, QTextDocument::FindWholeWords);
    QTextCursor cursor = ui.textEdit->textCursor();
    if (!cursor.isNull())
        found = true;
}