/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the examples of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include <QtUiTools>+
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#include <QtGui>+
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#include "textfinder.h"+
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+
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//! [0]+
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TextFinder::TextFinder(QWidget *parent)+
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    : QWidget(parent)+
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{+
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    QWidget *formWidget = loadUiFile();+
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+
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//! [1]+
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    ui_findButton = qFindChild<QPushButton*>(this, "findButton");+
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    ui_textEdit = qFindChild<QTextEdit*>(this, "textEdit");+
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    ui_lineEdit = qFindChild<QLineEdit*>(this, "lineEdit");+
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//! [0] //! [1]+
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+
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//! [2]+
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    QMetaObject::connectSlotsByName(this);+
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//! [2]+
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+
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//! [3a]+
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    loadTextFile();+
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//! [3a]+
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+
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//! [3b]+
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    QVBoxLayout *layout = new QVBoxLayout;+
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    layout->addWidget(formWidget);+
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    setLayout(layout);+
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//! [3b]+
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+
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//! [3c]+
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    setWindowTitle(tr("Text Finder"));+
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    isFirstTime = true;+
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}+
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//! [3c]+
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+
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//! [4]+
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QWidget* TextFinder::loadUiFile()+
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{+
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    QUiLoader loader;+
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+
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    QFile file(":/forms/textfinder.ui");+
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    file.open(QFile::ReadOnly);+
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+
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    QWidget *formWidget = loader.load(&file, this);+
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    file.close();+
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+
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    return formWidget;+
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}+
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//! [4]+
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+
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//! [5]+
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void TextFinder::loadTextFile()+
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{+
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    QFile inputFile(":/forms/input.txt");+
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    inputFile.open(QIODevice::ReadOnly);+
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    QTextStream in(&inputFile);+
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    QString line = in.readAll();+
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    inputFile.close();+
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+
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    ui_textEdit->append(line);+
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    ui_textEdit->setUndoRedoEnabled(false);+
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    ui_textEdit->setUndoRedoEnabled(true);+
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}+
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//! [5]+
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+
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//! [6] //! [7]+
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void TextFinder::on_findButton_clicked()+
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{+
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    QString searchString = ui_lineEdit->text();+
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    QTextDocument *document = ui_textEdit->document();+
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+
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    bool found = false;+
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+
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    if (isFirstTime == false)+
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        document->undo();+
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+
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    if (searchString.isEmpty()) {+
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        QMessageBox::information(this, tr("Empty Search Field"),+
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                "The search field is empty. Please enter a word and click Find.");+
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    } else {+
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+
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        QTextCursor highlightCursor(document);  +
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        QTextCursor cursor(document);+
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        +
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        cursor.beginEditBlock();+
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//! [6]+
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+
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        QTextCharFormat plainFormat(highlightCursor.charFormat());+
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        QTextCharFormat colorFormat = plainFormat;+
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        colorFormat.setForeground(Qt::red);+
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+
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        while (!highlightCursor.isNull() && !highlightCursor.atEnd()) {+
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            highlightCursor = document->find(searchString, highlightCursor, QTextDocument::FindWholeWords);+
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+
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            if (!highlightCursor.isNull()) {+
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                found = true;+
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                highlightCursor.movePosition(QTextCursor::WordRight,+
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                                       QTextCursor::KeepAnchor);+
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                highlightCursor.mergeCharFormat(colorFormat);+
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            }+
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        }+
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+
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//! [8]+
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        cursor.endEditBlock();+
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//! [7] //! [9]+
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        isFirstTime = false;+
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+
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        if (found == false) {+
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            QMessageBox::information(this, tr("Word Not Found"),+
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                "Sorry, the word cannot be found.");+
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        }    +
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    }+
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}+
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//! [8] //! [9]+
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