pyqt5按钮打开文件
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[python] view plain copy
import sys
import os
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
class Notepad(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
def initUI(self):
openAction = QAction('Open', self)
openAction.setShortcut('Ctrl+O')
openAction.setStatusTip('Open a file')
openAction.triggered.connect(self.openFile)
closeAction = QAction('Close', self)
closeAction.setShortcut('Ctrl+Q')
closeAction.setStatusTip('Close Notepad')
closeAction.triggered.connect(self.close)
menubar = self.menuBar()
fileMenu = menubar.addMenu('&File')
fileMenu.addAction(openAction)
fileMenu.addAction(closeAction)
self.textEdit = QTextEdit(self)
self.textEdit.setFocus()
self.textEdit.setReadOnly(True)
self.resize(700, 800)
self.setWindowTitle('Notepad')
self.setCentralWidget(self.textEdit)
self.show()
def openFile(self):
filename, _ = QFileDialog.getOpenFileName(self, 'Open File', os.getenv('HOME'))
fh = ''
if QFile.exists(filename):
fh = QFile(filename)
if not fh.open(QFile.ReadOnly):
QtGui.qApp.quit()
data = fh.readAll()
codec = QTextCodec.codecForUtfText(data)
unistr = codec.toUnicode(data)
tmp = ('Notepad: %s' % filename)
self.setWindowTitle(tmp)
self.textEdit.setText(unistr)
def main():
app = QApplication(sys.argv)
notepad = Notepad()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
