Question

如何打印未在窗口/窗口小部件上显示的页面？ Qt代码：切换视图

QPainter painter(printer);
m_webView->page()->setViewportSize(m_pageToPrint->mainFrame()->contentsSize());
painter.scale(scale, scale);
m_pageToPrint->mainFrame()->render(&painter);

要复制到剪贴板，请将视图切换为纯文本模式这是使用的代码（现在从m_webView转换为m_pageToPrint）从webView打印页面，显示，但m_pageToPrint的代码没有显示，只加载了要打印的HTML？上述代码的结果是PrinterPreviewer中的白页。这是加载html以及之后调用预览器的代码： Qt代码：切换视图

m_pageToPrint->mainFrame()->setHtml(finalHTML);
m_printPreviewDialog->exec();

要复制到剪贴板，请将视图切换为纯文本模式 finalHTML是一个有效的HTML代码。

Answer 1

我使用此代码打印我的HTML报告页面：

<强> reportprint.h

class ReportPrint : public QObject
{
    Q_OBJECT
    public:
        ReportPrint(QObject *parent = 0);
        void printHTML(QUrl url);
    private:
        QWebView m_webView;
        QPrinter m_printer;
        QPrintPreviewDialog *m_preview;
    protected slots:
        void printReady(bool enable);
        void paintRequested(QPrinter*printer);
}

<强> reportprint.cpp

ReportPrint::ReportPrint(QObject *parent) :
    QObject(parent) {
    connect(&m_webView, SIGNAL(loadFinished(bool)),this, SLOT(printReady(bool)));
}

void ReportPrint::printHTML(QUrl url) {
    m_webView.page()->settings()->clearMemoryCaches();
    // here I point to directory which contains printed html file so the engine can found css files
    QUrl base = QUrl::fromLocalFile(QApplication::applicationDirPath() + "templates/");         
    m_webView.setHtml(url,base);
}

void ReportPrint::printReady(bool enable) {
    if(print_to_default_printer) {
        QString pn = QPrinterInfo::defaultPrinter().printerName();
        m_printer.setPrinterName(pn);
        m_printer.setOutputFormat(QPrinter::NativeFormat);
        m_webView.print(&m_printer);
    } else if(print_with_preview) {
        m_preview = new QPrintPreviewDialog(&p_printer);                 
        connect(m_preview,SIGNAL(paintRequested(QPrinter*)),
                this,SLOT(paintRequested(QPrinter*)));
    }

}

void ReportPrint::paintRequested(QPrinter *printer) {
    m_printer.setOutputFormat(QPrinter::NativeFormat);
    m_webView.print(printer);
    m_preview->deleteLater();
}

打印未显示的WebPage

1 个答案: