Method loadCanvas

mainwindow.cpp:442–451

}

MyCanvas* MainWindow::loadCanvas(const QString &path){
    QFile input(path);
    input.open(QIODevice::ReadOnly);
    QTextStream ts(&input);
    QString magicString = ts.readLine();
    if(magicString != "VFdGeWFXUnZaekl3TURJd05ESTE=")   return nullptr;
    MyCanvas *newCanvas = new MyCanvas(ts, cornerRadius, ui->mainWidget);
    input.close();
    return newCanvas;
}