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[英]By clicking a button, print some texts entered in QLineEdit when a checkbox is checked PyQt4
[英]PyQt4: Read texts in QLineEdit/QTextEdit and implement the text change into some functions by clicking a button
我想通過在窗口小部件中輸入一些文本來更改函數中的某些值。 我不確定應該使用QLineEdit還是QTextEdit,因為我已經閱讀了一些文檔,而且它們似乎都可以做到。 我有一些示例代碼如下。
import sys
import PyQt4
from PyQt4 import QtGui, QtCore
from PyQt4.QtGui import *
from PyQt4.QtCore import *
class Widget(QWidget):
def __init__(self, parent= None):
super(Widget, self).__init__(parent)
layout = QGridLayout()
self.setLayout(layout)
btn = QPushButton('Push')
layout.addWidget(btn, 0, 0)
le = QLineEdit()
layout.addWidget(le, 0, 1)
def someFunc(self):
print () ## should print texts entered in le
app = QApplication(sys.argv)
widget = Widget()
widget.show()
app.exec_()
如您在上面看到的,我希望“ someFunc”方法通過單擊“推”按鈕來打印文件中放置的任何文本。
如果有人知道如何解決這個問題,請讓我知道謝謝!!
您需要將按鈕的clicked
信號連接到someFunc
,還需要將le
設置為主窗口的屬性(以便以后可以訪問它)。
因此,您的Widget
類應如下所示:
class Widget(QWidget):
def __init__(self, parent= None):
super(Widget, self).__init__(parent)
layout = QGridLayout()
self.setLayout(layout)
btn = QPushButton('Push')
# connect the signal to the slot
btn.clicked.connect(self.someFunc)
layout.addWidget(btn, 0, 0)
# set an attribute
self.le = QLineEdit()
self.le.textChanged.connect(self.otherFunc)
layout.addWidget(self.le, 0, 1)
def someFunc(self):
# use the attribute to get the text
print('button-clicked:', self.le.text())
def otherFunc(self, text):
print('text-changed:', text)
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