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Diffstat (limited to 'examples/uitools/textfinder/textfinder.cpp')
-rw-r--r-- | examples/uitools/textfinder/textfinder.cpp | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/examples/uitools/textfinder/textfinder.cpp b/examples/uitools/textfinder/textfinder.cpp new file mode 100644 index 0000000000..0a69d5e2dd --- /dev/null +++ b/examples/uitools/textfinder/textfinder.cpp @@ -0,0 +1,155 @@ +/**************************************************************************** +** +** 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] |