PyQt5（19）打印設置對話框，打印pdf文件以及文件的讀取

'''

使用打印機



'''

from PyQt5 import QtGui, QtWidgets, QtPrintSupport
from PyQt5.QtWidgets import *
import sys

class PrintSupport(QMainWindow):
    def __init__(self):
        super(PrintSupport,self).__init__()
        self.setGeometry(500, 200, 300, 300)
        self.button = QPushButton('打印QTextEdit控件中的內容',self)
        self.button.setGeometry(20,20,260,30)#從屏幕上（20，20）位置開始（即為最左上角的點），顯示一個260*30的界面（寬260，高30）
        self.editor = QTextEdit('默認文本',self)
        self.editor.setGeometry(20,60,260,200)

        self.button.clicked.connect(self.print)

    def print(self):
        printer = QtPrintSupport.QPrinter()

        painter = QtGui.QPainter()
        # 將繪制的目標重定向到打印機
        painter.begin(printer)
        screen = self.editor.grab()
        painter.drawPixmap(10,10,screen)#從左上角（10，10）開始繪制
        painter.end()
        print("print")


if __name__ == '__main__':
    app = QtWidgets.QApplication(sys.argv)
    gui = PrintSupport()
    gui.show()
    app.exec_()

'''

顯示打印對話框

'''
from PyQt5.QtWidgets import QWidget, QApplication, QPushButton, QTextEdit, QFileDialog, QDialog
from PyQt5.QtPrintSupport import QPageSetupDialog, QPrintDialog, QPrinter
import sys


class PrintDialog(QWidget):
    def __init__(self):
        super(PrintDialog,self).__init__()
        self.printer = QPrinter()
        self.initUI()



    def initUI(self):
        self.setGeometry(300, 300, 500, 400)
        self.setWindowTitle('打印對話框')

        self.editor = QTextEdit(self)
        self.editor.setGeometry(20,20,300,270)

        self.openButton = QPushButton('打開文件',self)
        self.openButton.move(350,20)

        self.settingsButton = QPushButton('打印設置',self)
        self.settingsButton.move(350,50)

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

        self.openButton.clicked.connect(self.openFile)
        self.settingsButton.clicked.connect(self.showSettingsDialog)
        self.printButton.clicked.connect(self.showPrintDialog)

    # 打開文件
    def openFile(self):
        fname = QFileDialog.getOpenFileName(self,'打開文本文件','./')
        if fname[0]:
            with open(fname[0],'r',encoding='utf-8',errors = 'ignore') as f:
                self.editor.setText(f.read())
    # 顯示打印設置對話框
    def showSettingsDialog(self):
        printDialog = QPageSetupDialog(self.printer,self)
        printDialog.exec()

    # 顯示打印對話框
    def showPrintDialog(self):
        printdialog = QPrintDialog(self.printer,self)
        if QDialog.Accepted == printdialog.exec():
            self.editor.print(self.printer)





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