mainwindow.cpp

qt-x11-opensource-src-4.1.4.tar.gz源码

/****************************************************************************
**
** Copyright (C) 2005-2006 Trolltech ASA. All rights reserved.
**
** This file is part of the example classes of the Qt Toolkit.
**
** This file may be used under the terms of the GNU General Public
** License version 2.0 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 GNU
** General Public Licensing requirements will be met:
** http://www.trolltech.com/products/qt/opensource.html
**
** If you are unsure which license is appropriate for your use, please
** review the following information:
** http://www.trolltech.com/products/qt/licensing.html or contact the
** sales department at [e-mail].
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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****************************************************************************/

#include <QtGui>

#include "mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
{
    setupFileMenu();
    setupHelpMenu();
    setupEditor();

    setCentralWidget(editor);
    setWindowTitle(tr("Syntax Highlighter"));
}

void MainWindow::about()
{
    QMessageBox::about(this, tr("About Syntax Highlighter"),
                tr("<p>The <b>Syntax Highlighter</b> example shows how " \
                   "to perform simple syntax highlighting by subclassing " \
                   "the QSyntaxHighlighter class and describing " \
                   "highlighting rules using regular expressions.</p>"));
}

void MainWindow::newFile()
{
    editor->clear();
}

void MainWindow::openFile(const QString &path)
{
    QString fileName = path;

    if (fileName.isNull())
        fileName = QFileDialog::getOpenFileName(this,
            tr("Open File"), "", "C++ Files (*.cpp *.h)");

    if (!fileName.isEmpty()) {
        QFile file(fileName);
        if (file.open(QFile::ReadOnly | QFile::Text))
            editor->setPlainText(file.readAll());
    }
}

void MainWindow::setupEditor()
{
    QFont font;
    font.setFamily("Courier");
    font.setFixedPitch(true);
    font.setPointSize(10);

    editor = new QTextEdit;
    editor->setFont(font);

    highlighter = new Highlighter(editor->document());

    QFile file("mainwindow.h");
    if (file.open(QFile::ReadOnly | QFile::Text))
        editor->setPlainText(file.readAll());
}

void MainWindow::setupFileMenu()
{
    QMenu *fileMenu = new QMenu(tr("&File"), this);
    menuBar()->addMenu(fileMenu);

    fileMenu->addAction(tr("&New"), this, SLOT(newFile()),
                        QKeySequence(tr("Ctrl+N",
                                        "File|New")));
    fileMenu->addAction(tr("&Open..."), this, SLOT(openFile()),
                        QKeySequence(tr("Ctrl+O",
                                        "File|Open")));
    fileMenu->addAction(tr("E&xit"), qApp, SLOT(quit()),
                        QKeySequence(tr("Ctrl+Q",
                                        "File|Exit")));
}

void MainWindow::setupHelpMenu()
{
    QMenu *helpMenu = new QMenu(tr("&Help"), this);
    menuBar()->addMenu(helpMenu);

    helpMenu->addAction(tr("&About"), this, SLOT(about()));
    helpMenu->addAction(tr("About &Qt"), qApp, SLOT(aboutQt()));
}