#include <QtGui>#include <QtDebug>#include "mainwindow.h"MainWindow::MainWindow()    : QMainWindow(){    area = new SvgWindow;    QMenu *fileMenu = new QMenu(tr("&File"), this);    QAction *openAction = fileMenu->addAction(tr("&Open..."));    openAction->setShortcut(QKeySequence(tr("Ctrl+O")));    QAction *quitAction = fileMenu->addAction(tr("E&xit"));    quitAction->setShortcut(QKeySequence(tr("Ctrl+Q")));    menuBar()->addMenu(fileMenu);    connect(openAction, SIGNAL(triggered()), this, SLOT(openFile()));    connect(quitAction, SIGNAL(triggered()), qApp, SLOT(quit()));    setCentralWidget(area);    setWindowTitle(tr("SVG Viewer"));}void MainWindow::openFile(const QString &path){    QString fileName;    if (path.isNull())        fileName = QFileDialog::getOpenFileName(this, tr("Open SVG File"),                                                currentPath, "*.svg");    else        fileName = path;    if (!fileName.isEmpty()) {        area->openFile(fileName);        if (!fileName.startsWith(":/")) {            currentPath = fileName;            setWindowTitle(tr("%1 - SVGViewer").arg(currentPath));        }    }}