PyQt5基本窗口控件-----QTextEdit

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QtextEdit类可以输入多行字符串，当超过显示范围后，会显示滚动条，还可以显示HTML文档

import sys
from PyQt5.QtWidgets import *

class QTextEditDemo(QWidget):
    def __init__(self):
        super(QTextEditDemo, self).__init__()
        self.initUI()

    def initUI(self):
        self.setWindowTitle('QTextEdit控件')
        self.resize(300, 280)

        self.textEdit = QTextEdit()
        self.buttonText = QPushButton('显示文本')
        self.buttonHTML = QPushButton('显示HTML')

        self.buttonToText = QPushButton('获取文本')
        self.buttonToHTML = QPushButton('获取HTML')

        layout = QVBoxLayout()
        layout.addWidget(self.textEdit)
        layout.addWidget(self.buttonText)
        layout.addWidget(self.buttonHTML)
        layout.addWidget(self.buttonToText)
        layout.addWidget(self.buttonToHTML)

        self.setLayout(layout)

        self.buttonText.clicked.connect(self.onClick_ButtonText)
        self.buttonHTML.clicked.connect(self.onClick_ButtonHTML)

        self.buttonToText.clicked.connect(self.onClick_ButtonToText)
        self.buttonToHTML.clicked.connect(self.onClick_ButtonToHTML)

    def onClick_ButtonText(self):
        self.textEdit.setPlainText('hello world')

    def onClick_ButtonHTML(self):
        self.textEdit.setHtml('<font color="blue" size=6>hello pyqt5</font>')

    def onClick_ButtonToText(self):
        print(self.textEdit.toPlainText())

    def onClick_ButtonToHTML(self):
        print(self.textEdit.toHtml())

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