pyQt4 lineで入力/戻り値が押されたときの表示方法

Question

私はユーザーが入力するかどうかを判断する方法がわからないという問題があります。私が読んだstackoverflowの投稿とドキュメントのすべては、self.textEdit.returnPressed.connect、またはその行に沿った何かを追加するように指示し、ソリューションのどれも動作しません。私はここでは、コードだPyQtは4を使用しています：

# -*- coding: utf-8 -*- 

# Form implementation generated from reading ui file 'untitled.ui' 
# 
# Created by: PyQt4 UI code generator 4.11.4 
# 
# WARNING! All changes made in this file will be lost! 

import gi 
import signal 
gi.require_version('Gtk', '3.0') 
import sys 
import dbus 
import pygtk 
import gi 
import signal 
from PyQt4 import QtCore, QtGui 
from PyQt4.QtCore import pyqtSlot 
from PyQt4.QtCore import QUrl 
from PyQt4.QtWebKit import QWebView 

import sip 
sip.setapi('QString', 2) 
sip.setapi('QVariant', 2) 

gi.require_version('Notify', '0.7') 


try: 
    _fromUtf8 = QtCore.QString.fromUtf8 
except AttributeError: 
    def _fromUtf8(s): 
     return s 

try: 
    _encoding = QtGui.QApplication.UnicodeUTF8 
    def _translate(context, text, disambig): 
     return QtGui.QApplication.translate(context, text, disambig, _encoding) 
except AttributeError: 
    def _translate(context, text, disambig): 
     return QtGui.QApplication.translate(context, text, disambig) 

class Ui_MainWindow(object): 
    def setupUi(self, MainWindow): 
     MainWindow.setObjectName(_fromUtf8("MainWindow")) 
     MainWindow.resize(679, 600) 
     self.centralwidget = QtGui.QWidget(MainWindow) 
     self.centralwidget.setObjectName(_fromUtf8("centralwidget")) 

     self.saveButton = QtGui.QPushButton(self.centralwidget) 
     self.saveButton.setGeometry(QtCore.QRect(10, 0, 88, 28)) 
     self.saveButton.setObjectName(_fromUtf8("pushButton")) 

     self.textEdit = QtGui.QTextEdit(self.centralwidget) 
     self.textEdit.setGeometry(QtCore.QRect(0, 30, 681, 800)) 
     self.textEdit.setObjectName(_fromUtf8("textEdit")) 

     self.fontButton = QtGui.QPushButton(self.centralwidget) 
     self.fontButton.setGeometry(QtCore.QRect(400, 0, 88, 28)) 
     self.fontButton.setObjectName(_fromUtf8("fontButton")) 

     self.fontSize = QtGui.QTextEdit(self.centralwidget) 
     self.fontSize.setGeometry(QtCore.QRect(200, 0, 88, 28)) 
     self.fontSize.setObjectName(_fromUtf8("fontEdit")) 
     self.fontSize.returnPressed.connect(self.pushButtonOK.click) 

     MainWindow.setCentralWidget(self.centralwidget) 
     self.menubar = QtGui.QMenuBar(MainWindow) 
     self.menubar.setGeometry(QtCore.QRect(0, 0, 679, 24)) 
     self.menubar.setObjectName(_fromUtf8("menubar")) 

     self.menuTest = QtGui.QMenu(self.menubar) 
     self.menuTest.setObjectName(_fromUtf8("menuTest")) 
     MainWindow.setMenuBar(self.menubar) 

     self.statusbar = QtGui.QStatusBar(MainWindow) 
     self.statusbar.setObjectName(_fromUtf8("statusbar")) 
     MainWindow.setStatusBar(self.statusbar) 
     self.menubar.addAction(self.menuTest.menuAction()) 

     self.retranslateUi(MainWindow) 
     QtCore.QMetaObject.connectSlotsByName(MainWindow) 

     @QtCore.pyqtSlot() 
     def on_pushButtonOK_clicked(self): 
      inputNumber = self.lineEditNumber.text() 
      if inputNumber.isdigit(): 
       info = "You selected `{0}`" 

      else: 
       info = "Please select a number, `{0}` isn't valid!" 

      print(info.format(inputNumber)) 

     #functions 



     def save(self): 
      with open('log.txt', 'w') as yourFile: 
       yourFile.write(str(self.textEdit.toPlainText())) 

     def saveFont(self): 
      self.QtGui.QtFont.font.setPointSize(int(self.fontSize)) 


     def commander(self): 
      save(self) 

     self.saveButton.clicked.connect(lambda: save(self)) 
     self.fontButton.clicked.connect(lambda: save(self)) 



    def retranslateUi(self, MainWindow): 
     MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow", None)) 
     self.saveButton.setText(_translate("MainWindow", "Save text", None)) 
     self.fontButton.setText(_translate("MainWindow", "Save Font", None)) 
     self.menuTest.setTitle(_translate("MainWindow", "test", None)) 

if __name__ == "__main__": 
    import sys 
    app = QtGui.QApplication(sys.argv) 
    MainWindow = QtGui.QMainWindow() 
    ui = Ui_MainWindow() 
    ui.setupUi(MainWindow) 
    MainWindow.show() 
    sys.exit(app.exec_()) 

Answer 1

あなたがミス

• returnPressedQtLineEditと作品に持っているとあなたがself.pushButtonOKが、self.saveButtonとself.fontButton
を持っていない QtTextEdit
• を使用します

あなたが必要です

self.fontSize = QtGui.QLineEdit(self.centralwidget) 
    self.fontSize.setGeometry(QtCore.QRect(200, 0, 88, 28)) 
    self.fontSize.setObjectName(_fromUtf8("fontEdit")) 
    self.fontSize.returnPressed.connect(self.fontButton.click)