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Diffstat (limited to 'examples/uitools/textfinder/textfinder.cpp')
| -rw-r--r-- | examples/uitools/textfinder/textfinder.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/examples/uitools/textfinder/textfinder.cpp b/examples/uitools/textfinder/textfinder.cpp new file mode 100644 index 0000000..d4b5d9e --- /dev/null +++ b/examples/uitools/textfinder/textfinder.cpp @@ -0,0 +1,156 @@ +/**************************************************************************** +** +** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). +** Contact: Qt Software Information (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 either Technology Preview License Agreement or the +** Beta Release License Agreement. +** +** 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 1.0, included in the file LGPL_EXCEPTION.txt in this +** package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** If you are unsure which license is appropriate for your use, please +** contact the sales department at qt-sales@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] |