文本编辑框QTextEdit

 1 import sys
 2 from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QTextEdit, QTextBrowser, QHBoxLayout, QVBoxLayout
 3 
 4 class Demo(QWidget):
 5     def __init__(self):
 6         super(Demo, self).__init__()
 7         self.edit_label = QLabel(‘文本编辑框QTextEdit‘, self)
 8         self.browser_label = QLabel(‘文本浏览框QTextBrowser‘, self)
 9         self.text_edit = QTextEdit(self)   #实例化文本编辑框
10         self.text_browser = QTextBrowser(self)  #实例化文本浏览框
11         self.edit_v_layout = QVBoxLayout()
12         self.browser_v_layout = QVBoxLayout()
13         self.all_h_layout = QHBoxLayout()
14         self.layout_init()
15         self.text_edit_init()
16         self.text_edit.setPlainText(‘我是李明\n我是物理教师‘)  #设置文本编辑框的内容
17         #self.text_edit.clear()  #清楚文本编辑框的内容
18 
19     def layout_init(self):
20         self.edit_v_layout.addWidget(self.edit_label)
21         self.edit_v_layout.addWidget(self.text_edit)
22 
23         self.browser_v_layout.addWidget(self.browser_label)
24         self.browser_v_layout.addWidget(self.text_browser)
25 
26         self.all_h_layout.addLayout(self.edit_v_layout)
27         self.all_h_layout.addLayout(self.browser_v_layout)
28 
29         self.setLayout(self.all_h_layout)
30 
31     def text_edit_init(self):
32         self.text_edit.textChanged.connect(self.show_text_func)  #文本内容发生变化时
33 
34     def show_text_func(self):#文本内容发生变化时的槽函数
35         self.text_browser.setText(self.text_edit.toPlainText())  #toPlainText()返回文本编辑框的内容
36         #setText()设置文本浏览框的内容
37 
38 
39 if __name__ == ‘__main__‘:
40     app = QApplication(sys.argv)
41     demo = Demo()
42     demo.show()
43     sys.exit(app.exec_())