[英]Print a WebPage that isn't shown
如何打印未在窗口/小部件上顯示的頁面? Qt代碼:切換視圖
QPainter painter(printer);
m_webView->page()->setViewportSize(m_pageToPrint->mainFrame()->contentsSize());
painter.scale(scale, scale);
m_pageToPrint->mainFrame()->render(&painter);
要復制到剪貼板,將視圖切換到純文本模式這是用於從webView打印頁面的代碼(現在已從m_webView轉換為m_pageToPrint),但未顯示,但僅加載了m_pageToPrint的代碼要打印的HTML? 上面的代碼的結果是PrinterPreviewer中的白頁。 這是加載html並隨后調用預覽器的代碼:Qt代碼:切換視圖
m_pageToPrint->mainFrame()->setHtml(finalHTML);
m_printPreviewDialog->exec();
要復制到剪貼板,請將視圖切換到純文本模式finalHTML是有效的html代碼。
我使用以下代碼來打印我的HTML報告頁面:
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);
}
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();
}
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