Complex/Sample Note(Python) at master · Xiaofeng7s/Complex · GitHub

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from PyQt5.QtWidgets import QMainWindow,QAction,QTextEdit,QApplication,QFileDialog,qApp
import sys

class myNote():
    def __init__(self):
        super().__init__()
        self.initUI()


    def initUI(self):
        self.window=QMainWindow()
        self.window.setGeometry(400,400,500,800)

        openAct=QAction('打开文件',self.window)
        openAct.setShortcut('Ctrl+o')
        openAct.triggered.connect(self.openFile)

        saveAct=QAction('保存文件',self.window)
        saveAct.setShortcut('Ctrl+s')
        saveAct.triggered.connect(self.saveFile)

        newAct=QAction('新建文件',self.window)
        newAct.setShortcut('Ctrl+n')
        newAct.triggered.connect(self.newFile)

        exitAct=QAction('退出',self.window)
        exitAct.triggered.connect(qApp.quit)


        self.toolbar=self.window.addToolBar('open file')
        self.toolbar.addAction(openAct)
        self.toolbar.addAction(saveAct)
        self.toolbar.addAction(newAct)
        self.toolbar.addAction(exitAct)

        self.textEdit=QTextEdit(self.window)
        self.window.setCentralWidget(self.textEdit)


    def openFile(self):
        fname=QFileDialog.getOpenFileName(self.window,'open file','/home')
        self.fileurl=fname[0]
        if self.fileurl:
            f=open(self.fileurl,'r')
            with f:
                file=f.read()
                self.textEdit.setText(file)

    def saveFile(self):
        try:
            f = open(self.fileurl, 'w')
            with f:
                file=self.textEdit.toPlainText()
                f.write(file)
        except:
            self.newFile()
            self.saveFile()


    def newFile(self):
        fname = QFileDialog.getSaveFileName(self.window,'save file','/home')
        if fname[0]:
            self.fileurl=fname[0]+".txt"
            self.textEdit.setText("")


if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = myNote()
    ex.window.show()
    sys.exit(app.exec_())