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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+** * Redistributions of source code must retain the above copyright
+** notice, this list of conditions and the following disclaimer.
+** * Redistributions in binary form must reproduce the above copyright
+** notice, this list of conditions and the following disclaimer in
+** the documentation and/or other materials provided with the
+** distribution.
+** * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+** the names of its contributors may be used to endorse or promote
+** products derived from this software without specific prior written
+** permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtUiTools>
+#include <QtGui>
+#include "textfinder.h"
+
+//! [0]
+TextFinder::TextFinder(QWidget *parent)
+ : QWidget(parent)
+{
+ QWidget *formWidget = loadUiFile();
+
+//! [1]
+ ui_findButton = findChild<QPushButton*>("findButton");
+ ui_textEdit = findChild<QTextEdit*>("textEdit");
+ ui_lineEdit = findChild<QLineEdit*>("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.isEmpty()) {
+ 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]