当在字符串中按下 QpushButton 时,如何在 QlineEdit 中获取文本?

发布于 2024-09-05 17:10:46 字数 1062 浏览 6 评论 0原文

我正在尝试实现一个功能。我的代码如下。

当用户单击名称为“connect”的按钮时,我想在 lineedit 中获取对象名为“host”的文本,字符串中为“shost”。我该怎么做?我尝试过但失败了。我该如何实现这个功能呢?

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *


class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        le = QLineEdit()
        le.setObjectName("host")
        le.setText("Host")
        pb = QPushButton()
        pb.setObjectName("connect")
        pb.setText("Connect") 
        layout.addWidget(le)
        layout.addWidget(pb)
        self.setLayout(layout)

        self.connect(pb, SIGNAL("clicked()"),self.button_click)

        self.setWindowTitle("Learning")

    def button_click(self):
    #i want the text in lineedit with objectname 
    #'host' in a string say 'shost'. when the user click 
    # the pushbutton with name connect.How do i do it?
    # I tried and failed. How to implement this function?




app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

现在我如何实现“button_click”功能?我刚刚开始使用 pyQt!

I am trying to implement a function. My code is given below.

I want to get the text in lineedit with objectname 'host' in a string say 'shost' when the user clicks the pushbutton with name 'connect'. How can I do this? I tried and failed. How do I implement this function?

import sys
from PyQt4.QtCore import *
from PyQt4.QtGui import *


class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        le = QLineEdit()
        le.setObjectName("host")
        le.setText("Host")
        pb = QPushButton()
        pb.setObjectName("connect")
        pb.setText("Connect") 
        layout.addWidget(le)
        layout.addWidget(pb)
        self.setLayout(layout)

        self.connect(pb, SIGNAL("clicked()"),self.button_click)

        self.setWindowTitle("Learning")

    def button_click(self):
    #i want the text in lineedit with objectname 
    #'host' in a string say 'shost'. when the user click 
    # the pushbutton with name connect.How do i do it?
    # I tried and failed. How to implement this function?




app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

Now how do I implement the function "button_click" ? I have just started with pyQt!

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评论(4

不…忘初心 2024-09-12 17:10:47

我的第一个建议是使用 Qt Designer 来创建 GUI。自己输入它们很糟糕,需要更多时间,而且肯定会比 Qt Designer 犯更多错误。

这里有一些 PyQt 教程来帮助您让你走上正轨。列表中的第一个是您应该开始的地方。

要了解哪些方法可用于特定类,一个很好的指南是 PyQt4 类参考。在这种情况下,您将查找 QLineEdit 并看到有一个 text 方法。

要回答您的具体问题:

要使您的 GUI 元素可供对象的其余部分使用,请在它们前面加上 self.

import sys
from PyQt4.QtCore import SIGNAL
from PyQt4.QtGui import QDialog, QApplication, QPushButton, QLineEdit, QFormLayout

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.le = QLineEdit()
        self.le.setObjectName("host")
        self.le.setText("Host")
        
        self.pb = QPushButton()
        self.pb.setObjectName("connect")
        self.pb.setText("Connect") 
        
        layout = QFormLayout()
        layout.addWidget(self.le)
        layout.addWidget(self.pb)

        self.setLayout(layout)
        self.connect(self.pb, SIGNAL("clicked()"),self.button_click)
        self.setWindowTitle("Learning")

    def button_click(self):
        # shost is a QString object
        shost = self.le.text()
        print shost
        

app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

My first suggestion is to use Qt Designer to create your GUIs. Typing them out yourself sucks, takes more time, and you will definitely make more mistakes than Qt Designer.

Here are some PyQt tutorials to help get you on the right track. The first one in the list is where you should start.

A good guide for figuring out what methods are available for specific classes is the PyQt4 Class Reference. In this case, you would look up QLineEdit and see the there is a text method.

To answer your specific question:

To make your GUI elements available to the rest of the object, preface them with self.

import sys
from PyQt4.QtCore import SIGNAL
from PyQt4.QtGui import QDialog, QApplication, QPushButton, QLineEdit, QFormLayout

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.le = QLineEdit()
        self.le.setObjectName("host")
        self.le.setText("Host")
        
        self.pb = QPushButton()
        self.pb.setObjectName("connect")
        self.pb.setText("Connect") 
        
        layout = QFormLayout()
        layout.addWidget(self.le)
        layout.addWidget(self.pb)

        self.setLayout(layout)
        self.connect(self.pb, SIGNAL("clicked()"),self.button_click)
        self.setWindowTitle("Learning")

    def button_click(self):
        # shost is a QString object
        shost = self.le.text()
        print shost
        

app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()
画▽骨i 2024-09-12 17:10:47

对象名称并不是很重要。
您应该关注的是存储 lineedit 对象(le)和按钮对象(pb)的变量,

QObject(self.pb, SIGNAL("clicked()"), self.button_clicked)

def button_clicked(self):
  self.le.setText("shost")

我认为这就是您想要的。
我希望我正确地回答了你的问题:)

The object name is not very important.
what you should be focusing at is the variable that stores the lineedit object (le) and your pushbutton object(pb)

QObject(self.pb, SIGNAL("clicked()"), self.button_clicked)

def button_clicked(self):
  self.le.setText("shost")

I think this is what you want.
I hope i got your question correctly :)

怪我闹别瞎闹 2024-09-12 17:10:47

在 PyQt5 中实现的可接受的解决方案

import sys
from PyQt5.QtWidgets import QApplication, QDialog, QFormLayout
from PyQt5.QtWidgets import (QPushButton, QLineEdit)

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.le = QLineEdit()
        self.le.setObjectName("host")
        self.le.setText("Host")

        self.pb = QPushButton()
        self.pb.setObjectName("connect")
        self.pb.setText("Connect")
        self.pb.clicked.connect(self.button_click)

        layout = QFormLayout()
        layout.addWidget(self.le)
        layout.addWidget(self.pb)
        self.setLayout(layout)

        self.setWindowTitle("Learning")

    def button_click(self):
        # shost is a QString object
        shost = self.le.text()
        print (shost)


app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

Acepted solution implemented in PyQt5

import sys
from PyQt5.QtWidgets import QApplication, QDialog, QFormLayout
from PyQt5.QtWidgets import (QPushButton, QLineEdit)

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.le = QLineEdit()
        self.le.setObjectName("host")
        self.le.setText("Host")

        self.pb = QPushButton()
        self.pb.setObjectName("connect")
        self.pb.setText("Connect")
        self.pb.clicked.connect(self.button_click)

        layout = QFormLayout()
        layout.addWidget(self.le)
        layout.addWidget(self.pb)
        self.setLayout(layout)

        self.setWindowTitle("Learning")

    def button_click(self):
        # shost is a QString object
        shost = self.le.text()
        print (shost)


app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()
东走西顾 2024-09-12 17:10:47

简短而一般的答案是:

self.input = QLineEdit()
your_text = self.input.text()

Short and general answer is:

self.input = QLineEdit()
your_text = self.input.text()
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