mainwindow.cpp

本文件是＜精通QT4编程＞的配套源代码

#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));
        }
    }
}