pyqt5学习之QPainTextEditer

from PyQt5.Qt import *
import sys


# *************占位提示文本***************开始
# app = QApplication(sys.argv)
#
# window = QWidget()
# window.setWindowTitle(‘学习‘)
# window.resize(500, 500)
#
# text = QPlainTextEdit(window)
# text.resize(100, 100)
# text.move(200, 200)
# text.setPlaceholderText(‘123‘)  # 设置占位提示文本
# print(text.placeholderText())
#
# window.show()
#
# sys.exit(app.exec_())
# *************占位提示文本***************结束

# *************设置只读***************开始
# app = QApplication(sys.argv)
#
# window = QWidget()
# window.setWindowTitle(‘学习‘)
# window.resize(500, 500)
#
# text = QPlainTextEdit(window)
# text.resize(100, 100)
# text.move(200, 200)
# text.setPlaceholderText(‘123‘)  # 设置占位提示文本
# print(text.placeholderText())
#
# text1 = QPlainTextEdit(window)
# text1.resize(100, 100)
# text1.move(200, 300)
# text1.setReadOnly(True)  # 设置只读
# print(text1.isReadOnly())
#
# window.show()
#
# sys.exit(app.exec_())
# *************设置只读***************结束


# *************覆盖模式***************开始
# app = QApplication(sys.argv)
#
# window = QWidget()
# window.setWindowTitle(‘学习‘)
# window.resize(500, 500)
#
# text = QPlainTextEdit(window)
# text.resize(100, 100)
# text.move(200, 200)
# text.setPlaceholderText(‘123‘)  # 设置占位提示文本
# print(text.placeholderText())
# text.setOverwriteMode(True)  # 设置覆盖模式
#
# text1 = QPlainTextEdit(window)
# text1.resize(100, 100)
# text1.move(200, 300)
# text1.setReadOnly(True)  # 设置只读
# print(text1.isReadOnly())
#
# window.show()
#
# sys.exit(app.exec_())

# *************覆盖模式***************结束


# *************占位提示文本***************开始
# app = QApplication(sys.argv)
#
# window = QWidget()
# window.setWindowTitle(‘学习‘)
# window.resize(500, 500)
#
# text = QPlainTextEdit(window)
# text.resize(100, 100)
# text.move(200, 200)
# text.setPlaceholderText(‘123‘)  # 设置占位提示文本
# print(text.placeholderText())
# text.setOverwriteMode(False)  # 设置覆盖模式
# text.setTabChangesFocus(True)  # tab控制
#
#
# text1 = QPlainTextEdit(window)
# text1.resize(100, 100)
# text1.move(200, 300)
# text1.setReadOnly(True)  # 设置只读
# print(text1.isReadOnly())
#
# window.show()
#
# sys.exit(app.exec_())
# *************占位提示文本***************结束

# *************文本操作***************开始
# app = QApplication(sys.argv)
#
# window = QWidget()
# window.setWindowTitle(‘学习‘)
# window.resize(500, 500)
#
# text = QPlainTextEdit(window)
# text.resize(100, 100)
# text.move(200, 200)
# text.setPlaceholderText(‘123‘)  # 设置占位提示文本
# print(text.placeholderText())
# text.setOverwriteMode(False)  # 设置覆盖模式
# text.setTabChangesFocus(True)  # tab控制
#
#
# text1 = QPlainTextEdit(window)
# text1.resize(100, 100)
# text1.move(200, 300)
# text1.setPlainText(‘789‘)  # 设置普通文本
# text1.appendPlainText(‘aaaaa‘)  #添加文本
# print(text1.isReadOnly())
#
# window.show()
#
# sys.exit(app.exec_())

# *************文本操作***************结束


# *************块操作***************开始
# app = QApplication(sys.argv)
#
# window = QWidget()
# window.setWindowTitle(‘学习‘)
# window.resize(500, 500)
#
# text = QPlainTextEdit(window)
# text.resize(100, 100)
# text.move(200, 200)
# text.setPlaceholderText(‘123‘)  # 设置占位提示文本
# print(text.placeholderText())
# text.setOverwriteMode(False)  # 设置覆盖模式
# text.setTabChangesFocus(True)  # tab控制
#
#
# text1 = QPlainTextEdit(window)
# text1.resize(100, 100)
# text1.move(200, 300)
# text1.setMaximumBlockCount(3)  # 设置最大块数显示的行数
# print(text1.isReadOnly())
#
# window.show()
#
# sys.exit(app.exec_())

# *************块操作***************结束