python3+PyQt5实现文档打印功能

yipeiwu_com5年前Python基础

本文通过Python3+PyQt5实现《python Qt Gui 快速编程》这本书13章文档打印功能。本文共通过三种方式:

1、使用HTML和QTextDOcument打印文档
2、使用QTextCusor和QTextDocument打印文档
3、使用QPainter打印文档

使用Qpainter打印文档比QTextDocument需要更操心和复杂的计算,但是QPainter确实能够对输出赋予完全控制。

#!/usr/bin/env python3
import math
import sys
import html
from PyQt5.QtPrintSupport import QPrinter,QPrintDialog
from PyQt5.QtCore import (QDate, QRectF, Qt)
from PyQt5.QtWidgets import (QApplication,QDialog, 
 QHBoxLayout,QPushButton, QTableWidget, QTableWidgetItem,QVBoxLayout)
from PyQt5.QtGui import (QFont,QFontMetrics,QPainter,QTextCharFormat,
  QTextCursor, QTextDocument, QTextFormat,
  QTextOption, QTextTableFormat,
  QPixmap,QTextBlockFormat)
import qrc_resources


from PyQt5.QtPrintSupport import QPrinter,QPrintDialog
from PyQt5.QtCore import (QDate, QRectF, Qt)
from PyQt5.QtWidgets import (QApplication,QDialog, 
 QHBoxLayout,QPushButton, QTableWidget, QTableWidgetItem,QVBoxLayout)
from PyQt5.QtGui import (QFont,QFontMetrics,QPainter,QTextCharFormat,
  QTextCursor, QTextDocument, QTextFormat,
  QTextOption, QTextTableFormat,
  QPixmap,QTextBlockFormat)
import qrc_resources
DATE_FORMAT = "MMM d, yyyy"


class Statement(object):

 def __init__(self, company, contact, address):
 self.company = company
 self.contact = contact
 self.address = address
 self.transactions = [] # List of (QDate, float) two-tuples


 def balance(self):
 return sum([amount for date, amount in self.transactions])


class Form(QDialog):

 def __init__(self, parent=None):
 super(Form, self).__init__(parent)

 self.printer = QPrinter()
 self.printer.setPageSize(QPrinter.Letter)
 self.generateFakeStatements()
 self.table = QTableWidget()
 self.populateTable()

 cursorButton = QPushButton("Print via Q&Cursor")
 htmlButton = QPushButton("Print via &HTML")
 painterButton = QPushButton("Print via Q&Painter")
 quitButton = QPushButton("&Quit")

 buttonLayout = QHBoxLayout()
 buttonLayout.addWidget(cursorButton)
 buttonLayout.addWidget(htmlButton)
 buttonLayout.addWidget(painterButton)
 buttonLayout.addStretch()
 buttonLayout.addWidget(quitButton)
 layout = QVBoxLayout()
 layout.addWidget(self.table)
 layout.addLayout(buttonLayout)
 self.setLayout(layout)

 cursorButton.clicked.connect(self.printViaQCursor)
 htmlButton.clicked.connect(self.printViaHtml)
 painterButton.clicked.connect(self.printViaQPainter)
 quitButton.clicked.connect(self.accept)

 self.setWindowTitle("Printing")


 def generateFakeStatements(self):
 self.statements = []
 statement = Statement("Consality", "Ms S. Royal",
 "234 Rue Saint Hyacinthe, 750201, Paris")
 statement.transactions.append((QDate(2007, 8, 11), 2342))
 statement.transactions.append((QDate(2007, 9, 10), 2342))
 statement.transactions.append((QDate(2007, 10, 9), 2352))
 statement.transactions.append((QDate(2007, 10, 17), -1500))
 statement.transactions.append((QDate(2007, 11, 12), 2352))
 statement.transactions.append((QDate(2007, 12, 10), 2352))
 statement.transactions.append((QDate(2007, 12, 20), -7500))
 statement.transactions.append((QDate(2007, 12, 20), 250))
 statement.transactions.append((QDate(2008, 1, 10), 2362))
 self.statements.append(statement)

 statement = Statement("Demamitur Plc", "Mr G. Brown",
 "14 Tall Towers, Tower Hamlets, London, WC1 3BX")
 statement.transactions.append((QDate(2007, 5, 21), 871))
 statement.transactions.append((QDate(2007, 6, 20), 542))
 statement.transactions.append((QDate(2007, 7, 20), 1123))
 statement.transactions.append((QDate(2007, 7, 20), -1928))
 statement.transactions.append((QDate(2007, 8, 13), -214))
 statement.transactions.append((QDate(2007, 9, 15), -3924))
 statement.transactions.append((QDate(2007, 9, 15), 2712))
 statement.transactions.append((QDate(2007, 9, 15), -273))
 #statement.transactions.append((QDate(2007, 11, 8), -728))
 #statement.transactions.append((QDate(2008, 2, 7), 228))
 #statement.transactions.append((QDate(2008, 3, 13), -508))
 #statement.transactions.append((QDate(2008, 3, 22), -2481))
 #statement.transactions.append((QDate(2008, 4, 5), 195))
 self.statements.append(statement)


 def populateTable(self):
 headers = ["Company", "Contact", "Address", "Balance"]
 self.table.setColumnCount(len(headers))
 self.table.setHorizontalHeaderLabels(headers)
 self.table.setRowCount(len(self.statements))
 for row, statement in enumerate(self.statements):
 self.table.setItem(row, 0, QTableWidgetItem(statement.company))
 self.table.setItem(row, 1, QTableWidgetItem(statement.contact))
 self.table.setItem(row, 2, QTableWidgetItem(statement.address))
 item = QTableWidgetItem("$ {0:,.2f}".format(float(statement.balance())))
 item.setTextAlignment(Qt.AlignRight|Qt.AlignVCenter)
 self.table.setItem(row, 3, item)
 self.table.resizeColumnsToContents()


 def printViaHtml(self):
 htmltext = ""
 for statement in self.statements:
 date = QDate.currentDate().toString(DATE_FORMAT)
 address = html.escape(statement.address).replace(
  ",", "<br>")
 contact = html.escape(statement.contact)
 balance = statement.balance()
 htmltext += ("<p align=right><img src=':/logo.png'></p>"
  "<p align=right>Greasy Hands Ltd."
  "<br>New Lombard Street"
  "<br>London<br>WC13 4PX<br>{0}</p>"
  "<p>{1}</p><p>Dear {2},</p>"
  "<p>The balance of your account is $ {3:,.2f}.").format(
  date, address, contact, float(balance))
 if balance < 0:
 htmltext += (" <p><font color=red><b>Please remit the "
  "amount owing immediately.</b></font>")
 else:
 htmltext += (" We are delighted to have done business "
  "with you.")
 htmltext += ("</p><p> </p><p>"
  "<table border=1 cellpadding=2 "
  "cellspacing=2><tr><td colspan=3>"
  "Transactions</td></tr>")
 for date, amount in statement.transactions:
 color, status = "black", "Credit"
 if amount < 0:
  color, status = "red", "Debit"
 htmltext += ("<tr><td align=right>{0}</td>"
  "<td>{1}</td><td align=right>"
  "<font color={2}>$ {3:,.2f}</font></td></tr>".format(
  date.toString(DATE_FORMAT), status, color,float(abs(amount))))
 htmltext += ("</table></p><p style='page-break-after:always;'>"
  "We hope to continue doing "
  "business with you,<br>Yours sincerely,"
  "<br><br>K. Longrey, Manager</p>")
 dialog = QPrintDialog(self.printer, self)
 if dialog.exec_():
 document = QTextDocument()
 document.setHtml(htmltext)
 document.print_(self.printer)

 def printViaQCursor(self):
 dialog = QPrintDialog(self.printer, self)
 if not dialog.exec_():
 return
 logo = QPixmap(":/logo.png")
 headFormat = QTextBlockFormat()
 headFormat.setAlignment(Qt.AlignLeft)
 headFormat.setTextIndent(
 self.printer.pageRect().width() - logo.width() - 216)
 bodyFormat = QTextBlockFormat()
 bodyFormat.setAlignment(Qt.AlignJustify)
 lastParaBodyFormat = QTextBlockFormat(bodyFormat)
 lastParaBodyFormat.setPageBreakPolicy(
 QTextFormat.PageBreak_AlwaysAfter)
 rightBodyFormat = QTextBlockFormat()
 rightBodyFormat.setAlignment(Qt.AlignRight)
 headCharFormat = QTextCharFormat()
 headCharFormat.setFont(QFont("Helvetica", 10))
 bodyCharFormat = QTextCharFormat()
 bodyCharFormat.setFont(QFont("Times", 11))
 redBodyCharFormat = QTextCharFormat(bodyCharFormat)
 redBodyCharFormat.setForeground(Qt.red)
 tableFormat = QTextTableFormat()
 tableFormat.setBorder(1)
 tableFormat.setCellPadding(2)

 document = QTextDocument()
 cursor = QTextCursor(document)
 mainFrame = cursor.currentFrame()
 page = 1
 for statement in self.statements:
 cursor.insertBlock(headFormat, headCharFormat)
 cursor.insertImage(":/logo.png")
 for text in ("Greasy Hands Ltd.", "New Lombard Street",
  "London", "WC13 4PX",
  QDate.currentDate().toString(DATE_FORMAT)):
 cursor.insertBlock(headFormat, headCharFormat)
 cursor.insertText(text)
 for line in statement.address.split(", "):
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 cursor.insertText(line)
 cursor.insertBlock(bodyFormat)
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 cursor.insertText("Dear {0},".format(statement.contact))
 cursor.insertBlock(bodyFormat)
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 balance = statement.balance()
 cursor.insertText("The balance of your account is $ {0:,.2f}.".format(float(balance)))
 if balance < 0:
 cursor.insertBlock(bodyFormat, redBodyCharFormat)
 cursor.insertText("Please remit the amount owing "
   "immediately.")
 else:
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 cursor.insertText("We are delighted to have done "
   "business with you.")
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 cursor.insertText("Transactions:")
 table = cursor.insertTable(len(statement.transactions), 3,
   tableFormat)
 row = 0
 for date, amount in statement.transactions:
 cellCursor = table.cellAt(row, 0).firstCursorPosition()
 cellCursor.setBlockFormat(rightBodyFormat)
 cellCursor.insertText(date.toString(DATE_FORMAT),
   bodyCharFormat)
 cellCursor = table.cellAt(row, 1).firstCursorPosition()
 if amount > 0:
  cellCursor.insertText("Credit", bodyCharFormat)
 else:
  cellCursor.insertText("Debit", bodyCharFormat)
 cellCursor = table.cellAt(row, 2).firstCursorPosition()
 cellCursor.setBlockFormat(rightBodyFormat)
 format = bodyCharFormat
 if amount < 0:
  format = redBodyCharFormat
 cellCursor.insertText("$ {0:,.2f}".format(float(amount)), format)
 row += 1
 cursor.setPosition(mainFrame.lastPosition())
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 cursor.insertText("We hope to continue doing business "
  "with you,")
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 cursor.insertText("Yours sincerely")
 cursor.insertBlock(bodyFormat)
 if page == len(self.statements):
 cursor.insertBlock(bodyFormat, bodyCharFormat)
 else:
 cursor.insertBlock(lastParaBodyFormat, bodyCharFormat)
 cursor.insertText("K. Longrey, Manager")
 page += 1
 document.print_(self.printer)


 def printViaQPainter(self):
 dialog = QPrintDialog(self.printer, self)
 if not dialog.exec_():
 return
 LeftMargin = 72
 sansFont = QFont("Helvetica", 10)
 sansLineHeight = QFontMetrics(sansFont).height()
 serifFont = QFont("Times", 11)
 fm = QFontMetrics(serifFont)
 DateWidth = fm.width(" September 99, 2999 ")
 CreditWidth = fm.width(" Credit ")
 AmountWidth = fm.width(" W999999.99 ")
 serifLineHeight = fm.height()
 logo = QPixmap(":/logo.png")
 painter = QPainter(self.printer)
 pageRect = self.printer.pageRect()
 page = 1
 for statement in self.statements:
 painter.save()
 y = 0
 x = pageRect.width() - logo.width() - LeftMargin
 painter.drawPixmap(x, 0, logo)
 y += logo.height() + sansLineHeight
 painter.setFont(sansFont)
 painter.drawText(x, y, "Greasy Hands Ltd.")
 y += sansLineHeight
 painter.drawText(x, y, "New Lombard Street")
 y += sansLineHeight
 painter.drawText(x, y, "London")
 y += sansLineHeight
 painter.drawText(x, y, "WC13 4PX")
 y += sansLineHeight
 painter.drawText(x, y,
  QDate.currentDate().toString(DATE_FORMAT))
 y += sansLineHeight
 painter.setFont(serifFont)
 x = LeftMargin
 for line in statement.address.split(", "):
 painter.drawText(x, y, line)
 y += serifLineHeight
 y += serifLineHeight
 painter.drawText(x, y, "Dear {0},".format(statement.contact))
 y += serifLineHeight

 balance = statement.balance()
 painter.drawText(x, y, "The balance of your account is $ {0:,.2f}".format(float(balance)))
 y += serifLineHeight
 if balance < 0:
 painter.setPen(Qt.red)
 text = "Please remit the amount owing immediately."
 else:
 text = ("We are delighted to have done business "
  "with you.")
 painter.drawText(x, y, text)
 painter.setPen(Qt.black)
 y += int(serifLineHeight * 1.5)
 painter.drawText(x, y, "Transactions:")
 y += serifLineHeight

 option = QTextOption(Qt.AlignRight|Qt.AlignVCenter)
 for date, amount in statement.transactions:
 x = LeftMargin
 h = int(fm.height() * 1.3)
 painter.drawRect(x, y, DateWidth, h)
 painter.drawText(
  QRectF(x + 3, y + 3, DateWidth - 6, h - 6),
  date.toString(DATE_FORMAT), option)
 x += DateWidth
 painter.drawRect(x, y, CreditWidth, h)
 text = "Credit"
 if amount < 0:
  text = "Debit"
 painter.drawText(
  QRectF(x + 3, y + 3, CreditWidth - 6, h - 6),
  text, option)
 x += CreditWidth
 painter.drawRect(x, y, AmountWidth, h)
 if amount < 0:
  painter.setPen(Qt.red)
 painter.drawText(
  QRectF(x + 3, y + 3, AmountWidth - 6, h - 6),
  "$ {0:,.2f}".format(float(amount)),
  option)
 painter.setPen(Qt.black)
 y += h
 y += serifLineHeight
 x = LeftMargin
 painter.drawText(x, y, "We hope to continue doing "
   "business with you,")
 y += serifLineHeight
 painter.drawText(x, y, "Yours sincerely")
 y += serifLineHeight * 3
 painter.drawText(x, y, "K. Longrey, Manager")
 x = LeftMargin
 y = pageRect.height() - 72
 painter.drawLine(x, y, pageRect.width() - LeftMargin, y)
 y += 2
 font = QFont("Helvetica", 9)
 font.setItalic(True)
 painter.setFont(font)
 option = QTextOption(Qt.AlignCenter)
 option.setWrapMode(QTextOption.WordWrap)
 painter.drawText(
  QRectF(x, y, pageRect.width() - 2 * LeftMargin, 31),
  "The contents of this letter are for information "
  "only and do not form part of any contract.",
  option)
 page += 1
 if page <= len(self.statements):
 self.printer.newPage()
 painter.restore()


if __name__ == "__main__":
 app = QApplication(sys.argv)
 form = Form()
 form.show()
 app.exec_()

运行结果:

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持【听图阁-专注于Python设计】。

相关文章

python 获取键盘输入,同时有超时的功能示例

如下所示: ''' ###get keyboard input and timeout =5 import sys, time, msvcrt def readInput( ca...

python3+pyqt5+itchat微信定时发送消息的方法

python3+pyqt5+itchat微信定时发送消息的方法

编这个程序是想过节过年,一些重要的纪念日,给亲戚好友发祝福之类的,但要凌晨0点才显得比较有诚意,可我又比较贪睡,常常忘了,所以就有了编个微信定时发送消息小程序. 运行环境: python...

最近Python有点火? 给你7个学习它的理由!

最近Python有点火? 给你7个学习它的理由!

Python 是一门更注重可读性和效率的语言,尤其是相较于 Java,PHP 以及 C++ 这样的语言,它的这两个优势让其在开发者中大受欢迎。 诚然,它有点老了,但仍是80后啊 —— 至...

Python实现Pig Latin小游戏实例代码

前言: 本文研究的主要是Python实现pig Latin小游戏的简单代码,具体介绍如下。 Pig Latin是一个语言游戏。 步骤: 1.让用户输入一个英文单词 2.确保用户输入...

Python 实现毫秒级淘宝抢购脚本的示例代码

本篇文章主要介绍了Python 通过selenium实现毫秒级自动抢购的示例代码,通过扫码登录即可自动完成一系列操作,抢购时间精确至毫秒,可抢加购物车等待时间结算的,也可以抢聚划算的商品...