PyQt5最全38 打印对话框之QPrintDialog显示打印对话框

import sys
from PyQt5.QtPrintSupport import QPageSetupDialog, QPrintDialog, QPrinter
from PyQt5.QtWidgets import *


class PrintDialog(QMainWindow):
    """
    显示打印对话框

    QFileDialog
    QPageSetupDialog
    QPrintDialog
    """

    def __init__(self):
        super(PrintDialog, self).__init__()
        self.printer = QPrinter()  # 千万别打错成QPainter了！！！
        self.initUI()

    def initUI(self):
        self.setGeometry(300, 300, 500, 400)
        self.setWindowTitle('打印对话框')

        self.editor = QTextEdit(self)
        self.editor.setGeometry(20, 20, 300, 270)
        self.openButton = QPushButton('打开文件', self)
        self.openButton.move(350, 20)

        self.settingButton = QPushButton('打印设置', self)
        self.settingButton.move(350, 50)

        self.printButton = QPushButton('打印文档', self)
        self.printButton.move(350, 80)

        # 信号与槽
        self.openButton.clicked.connect(self.openFile)
        self.settingButton.clicked.connect(self.showSettingsDialog)
        self.printButton.clicked.connect(self.showPrintDialog)

    # 打开文件
    def openFile(self):
        fname = QFileDialog.getOpenFileName(self, '打开文本文件', './')
        if fname[0]:
            with open(fname[0], 'r', encoding='utf-8', errors='ignore') as f:
                self.editor.setText(f.read())

    # 显示打印设置对话框
    def showSettingsDialog(self):
        # printerDialog = QPageSetupDialog(self.printer, self)
        printerDialog = QPageSetupDialog(self)
        printerDialog.exec()

    # 显示打印对话框
    def showPrintDialog(self):
        printDialog = QPrintDialog(self.printer, self)
        # printDialog = QPrintDialog(self)
        if QDialog.Accepted == printDialog.exec():
            self.editor.print(self.printer)


if __name__ == '__main__':
    app = QApplication(sys.argv)
    main = PrintDialog()
    print(main.__doc__)
    main.show()
    sys.exit(app.exec_())