examples/uitools/textfinder/textfinder.cpp
changeset 0 1918ee327afb
child 4 3b1da2848fc7
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/uitools/textfinder/textfinder.cpp	Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,156 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 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.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@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]