PyQt5 QLineEdit循环-已添加图像

Question

I want to make a P2P chat application.

So I have this sig / slot pieces together myself. What I need to achieve is that I want to enter text in the QLineEdit (named it send_box ) and display in the QTextedit (named it main_text ).

self.send_box.returnPressed.connect(self.sendData)

and here is the function definition

  def sendData(self):
        self.main_text.setText ('Hello World')

This works. But only send the "Hello World" to the QTextEdit when I press Enter key.

What I need is to send the text from the send_box ( QLineEdit ).

Answer 1

To get text from send_box and

• replace text in main_text

   self.main_text.setText( self.send_box.text() ) 

• append to existing text in main_text

   self.main_text.append( self.send_box.text() ) 

And then you can clear text in send_box

self.send_box.clear()

See doc for Qt5 (it's similar for PyQt5 ): QTextEdit and QLineEdit

Full example

from PyQt5 import QtGui, QtWidgets
import sys

class MyWindow(QtWidgets.QWidget):

    def __init__(self):
        super().__init__()

        self.vbox = QtWidgets.QVBoxLayout()
        self.setLayout(self.vbox)

        self.vbox.addWidget(QtWidgets.QLabel(text='Input:'))
        self.linetext = QtWidgets.QLineEdit()
        self.vbox.addWidget(self.linetext)

        self.linetext.returnPressed.connect(self.on_press_enter)

        self.vbox.addWidget(QtWidgets.QLabel(text='Output:'))
        self.textedit = QtWidgets.QTextEdit()
        self.vbox.addWidget(self.textedit)

        self.show()

    def on_press_enter(self):
        # copy from LineText to TextEdit
        #self.textedit.setText(self.linetext.text())
        self.textedit.append(self.linetext.text())
        # clear LineText
        self.linetext.clear()

app = QtWidgets.QApplication(sys.argv)
window = MyWindow()
app.exec()