puqt4 clearing the line edit field

Question

I am trying to create tqo line edit and when i click on the line edit box i should be able to clear the current text.

I tried the below code but no success ,

Can someone point out what is wrong here?

OPTIONS = ['Enter IP Address','Number of iteration']

def __init__(self, parent=None):
    QtGui.QWidget.__init__(self, 'Details', parent=parent)
    self.options = {}
    for option in OptionBox.OPTIONS:
        self.options[option] = (QtGui.QLineEdit(option))
        self.connect(self.options[option],  QtCore.SIGNAL("clicked()"), self.clicked)
    self._gridOptions()

def clicked(self):
    QLineEdit.clear()

Frodon · Accepted Answer · 2013-07-22T09:06:25.507

You need to use an event filter on the QLineEdit to catch the click event in it (https://qt-project.org/doc/qt-5.1/qtcore/qobject.html#eventFilter). Here is an example on how the code should look like:

def __init__(self, parent=None):
  QtGui.QWidget.__init__(self, 'Details', parent=parent)
  self.options = {}
  for option in OptionBox.OPTIONS:
    self.options[option] = QtGui.QLineEdit(option)
    self.options[option].installEventFilter(self)
  self._gridOptions()

def eventFilter(self, object, event):
  if (object in self.options.values()) and (event.type() == QtCore.QEvent.MouseButtonPress):
    object.clear()
    return False # lets the event continue to the edit
  return False

Edit: from what I understand, you just want a default text to appear in the QLineEdit which describe their role. This is a good opportunity to use the placeholderText. Here is the code modified to use it (there is no more need of the eventFilter method):

def __init__(self, parent=None):
  QtGui.QWidget.__init__(self, 'Details', parent=parent)
  self.options = {}
  for option in OptionBox.OPTIONS:
    self.options[option] = QtGui.QLineEdit()
    self.options[option].setPlaceholderText(option)
  self._gridOptions()

it is not clearing the text 'Enter IP Address','Number of iteration' which is in the QLineEdit — user2190483, Jul 22 '13 at 08:54
My fault: the test is on values of dict, not dict itself. I edited my answer and tested successfully. — Frodon, Jul 22 '13 at 09:01

puqt4 clearing the line edit field

1 Answers1