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/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the examples of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.1, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtUiTools>
#include <QtGui>
#include "textfinder.h"
//! [0]
TextFinder::TextFinder(QWidget *parent)
: QWidget(parent)
{
QWidget *formWidget = loadUiFile();
//! [1]
ui_findButton = qFindChild<QPushButton*>(this, "findButton");
ui_textEdit = qFindChild<QTextEdit*>(this, "textEdit");
ui_lineEdit = qFindChild<QLineEdit*>(this, "lineEdit");
//! [0] //! [1]
//! [2]
QMetaObject::connectSlotsByName(this);
//! [2]
//! [3a]
loadTextFile();
//! [3a]
//! [3b]
QVBoxLayout *layout = new QVBoxLayout;
layout->addWidget(formWidget);
setLayout(layout);
//! [3b]
//! [3c]
setWindowTitle(tr("Text Finder"));
isFirstTime = true;
}
//! [3c]
//! [4]
QWidget* TextFinder::loadUiFile()
{
QUiLoader loader;
QFile file(":/forms/textfinder.ui");
file.open(QFile::ReadOnly);
QWidget *formWidget = loader.load(&file, this);
file.close();
return formWidget;
}
//! [4]
//! [5]
void TextFinder::loadTextFile()
{
QFile inputFile(":/forms/input.txt");
inputFile.open(QIODevice::ReadOnly);
QTextStream in(&inputFile);
QString line = in.readAll();
inputFile.close();
ui_textEdit->append(line);
ui_textEdit->setUndoRedoEnabled(false);
ui_textEdit->setUndoRedoEnabled(true);
}
//! [5]
//! [6] //! [7]
void TextFinder::on_findButton_clicked()
{
QString searchString = ui_lineEdit->text();
QTextDocument *document = ui_textEdit->document();
bool found = false;
if (isFirstTime == false)
document->undo();
if (searchString == "") {
QMessageBox::information(this, tr("Empty Search Field"),
"The search field is empty. Please enter a word and click Find.");
} else {
QTextCursor highlightCursor(document);
QTextCursor cursor(document);
cursor.beginEditBlock();
//! [6]
QTextCharFormat plainFormat(highlightCursor.charFormat());
QTextCharFormat colorFormat = plainFormat;
colorFormat.setForeground(Qt::red);
while (!highlightCursor.isNull() && !highlightCursor.atEnd()) {
highlightCursor = document->find(searchString, highlightCursor, QTextDocument::FindWholeWords);
if (!highlightCursor.isNull()) {
found = true;
highlightCursor.movePosition(QTextCursor::WordRight,
QTextCursor::KeepAnchor);
highlightCursor.mergeCharFormat(colorFormat);
}
}
//! [8]
cursor.endEditBlock();
//! [7] //! [9]
isFirstTime = false;
if (found == false) {
QMessageBox::information(this, tr("Word Not Found"),
"Sorry, the word cannot be found.");
}
}
}
//! [8] //! [9]
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