qt5base-lts/examples/uitools/textfinder/textfinder.cpp
Lars Knoll e510b6e466 include fixes
Fixed the include statements
added QT+=widgets in examples/network to
get them to compile. Will need something better
than doing it manually.
2011-05-07 22:57:49 +02:00

156 lines
4.7 KiB
C++

/****************************************************************************
**
** 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 <QtWidgets>
#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]