Maison > Article > développement back-end > python3+PyQt5 implémente la fonction d'impression de documents
Cet article présente principalement en détail la fonction d'impression de documents de python3+PyQt5. Il a une certaine valeur de référence. Les amis intéressés peuvent s'y référer
Cet article adopte Python3 +PyQt5Implémente la fonction d'impression de documents dans le chapitre 13 du livre "python Qt Gui Rapid Programming". Cet article utilise trois méthodes :
2 Utilisez QTextCusor et QTextDocument pour imprimer des documents
3. Utilisez QPainter pour imprimer des documents
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Utiliser Qpainter pour imprimer des documents nécessite plus de soin et de calculs complexes que QTextDocument, mais QPainter donne un contrôle total sur la sortie.
#!/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_()
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