[提问]我用QPrintPreviewWidget做出预览PDF的效果 ，如何使显示内容的地方向两边扩展 [复制链接]

预览一直在窗口正中间而且挺小的字都看不清 我想放大预览界面
部分代码
QPrinter *printer=new QPrinter(QPrinter::HighResolution);    printer->setPaperSize(QPagedPaintDevice::A4);    printer->setPageMargins(QMarginsF(30, 30, 30, 30));    printer->setResolution(300);    printer->setOutputFormat(QPrinter::PdfFormat);    printer->setOrientation(QPrinter::Portrait);    Report_PDFPreview=new QPrintPreviewWidget(printer,this);//预览    connect(Report_PDFPreview,SIGNAL(paintRequested(QPrinter*)),this,SLOT(CreatePDF(QPrinter *)));    verticalLayout_Report_Right_Preview->addWidget(Report_PDFPreview);