向 QPrintWidget、QPrintPreviwWidget 添加页脚 [英] Adding a footer to QPrintWidget, QPrintPreviwWidget

问题描述

我的发票

我有一个几乎完成的 Python 项目，它使用 QPrintPreviwDialog 根据上图显示和打印数据.我已经使用 QTextDocumento 来处理 HTML.

有没有办法在页码空间写一些东西.我想将黄色信息写入页码空间作为页脚.或者是否有其他解决方案来显示页脚而不是使用 pyjasper(不属于 Python 的一部分)?

解决方案

Translating

My Invoice

I have a almost finishd project in Python which uses QPrintPreviwDialog to show and print data according to the picture above. I have used QTextDocumento to handle the HTML.

Is there a way to write something in page number space. I would like to write the info in yellow to the page number space to serve as footer. Or is there other solution to show footer instead of using pyjasper, one that are not part of python?

解决方案

Translating my previous answer from C++ to python and modifying the position of the text I show how to add a footer.

from PyQt5 import QtCore, QtGui, QtWidgets, QtPrintSupport

textMargins = 12
borderMargins = 10

def mmToPixels(printer, mm):
    return mm * 0.039370147 * printer.resolution()

def paintPage(pageNumber, pageCount, painter, doc, textRect, footerHeight):
    painter.save()
    textPageRect = QtCore.QRectF(QtCore.QPointF(0, pageNumber*doc.pageSize().height()), doc.pageSize())
    painter.setClipRect(textRect)
    painter.translate(0, -textPageRect.top())
    painter.translate(textRect.left(), textRect.top())
    doc.drawContents(painter)
    painter.restore()
    footerRect = QtCore.QRectF(textRect)
    footerRect.setTop(textRect.bottom())
    footerRect.setHeight(footerHeight)

    # draw footer
    painter.save()
    pen = painter.pen()
    pen.setColor(QtCore.Qt.blue)
    painter.setPen(pen)
    painter.drawText(footerRect, QtCore.Qt.AlignCenter, "Page {} of {}".format(pageNumber+1, pageCount))
    painter.restore()


def printDocument(printer, doc):
    painter = QtGui.QPainter(printer)
    doc.documentLayout().setPaintDevice(printer)
    doc.setPageSize(QtCore.QSizeF(printer.pageRect().size()))
    pageSize = printer.pageRect().size()
    tm = mmToPixels(printer, textMargins)
    footerHeight = painter.fontMetrics().height()
    textRect = QtCore.QRectF(tm, tm, pageSize.width() - 2 * tm, pageSize.height() - 2 * tm - footerHeight)
    doc.setPageSize(textRect.size())
    pageCount = doc.pageCount()

    for pageIndex in range(pageCount):
        if pageIndex != 0:
            printer.newPage()
        paintPage(pageIndex, pageCount, painter, doc, textRect, footerHeight)

if __name__ == '__main__':
    import sys

    app = QtWidgets.QApplication(sys.argv)
    document = QtGui.QTextDocument()
    cursor = QtGui.QTextCursor(document)
    blockFormat = QtGui.QTextBlockFormat()

    for i in range(10):
        cursor.insertBlock(blockFormat)
        cursor.insertHtml("<h1>This is the {} page</h1>".format(i+1))
        blockFormat.setPageBreakPolicy(QtGui.QTextFormat.PageBreak_AlwaysBefore)

    printer = QtPrintSupport.QPrinter(QtPrintSupport.QPrinter.HighResolution)
    printer.setPageSize(QtPrintSupport.QPrinter.A4)
    printer.setOutputFormat(QtPrintSupport.QPrinter.PdfFormat)

    dialog = QtPrintSupport.QPrintPreviewDialog(printer)
    dialog.paintRequested.connect(lambda print, doc=document: printDocument(printer, doc))


    dialog.exec_()

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