How to implement the functionality of “Don’t ask again ” dialog in PyQt4 ?

[redstoneleo]

It would be great to explain it by By example 

[jazzycamel]

The following example probably does what you want. If you want to remember the choice for the future, use [[doc:QSettings]].

@
from PyQt4.QtCore import *
from PyQt4.QtGui import *

class Dialog(QDialog):
def init(self, parent=None):
QDialog.init(self, parent)

    l=QVBoxLayout(self)
    l.addWidget(QLabel("A nice little dialog", self))

    self.dontShowCBox=QCheckBox("Don't show this dialog again")
    l.addWidget(self.dontShowCBox)

    l.addWidget(QDialogButtonBox(
                    QDialogButtonBox.Ok|QDialogButtonBox.Cancel, 
                    parent=self, 
                    accepted=self.accept, 
                    rejected=self.reject))

@staticmethod
def dialog(parent):
    d=Dialog(parent)
    if d.exec_(): return True, not d.dontShowCBox.isChecked()
    else: return False, False

class Widget(QWidget):
def init(self, parent=None):
QWidget.init(self, parent)

    self._prompt=True

    l=QVBoxLayout(self)
    l.addWidget(QPushButton("Button", self, clicked=self.dialogRequested))

@pyqtSlot()
def dialogRequested(self):
    if not self._prompt: return
    ok, prompt=Dialog.dialog(self)
    if ok: self._prompt=prompt

if name=="main":
from sys import argv, exit
a=QApplication(argv)
w=Widget()
w.show()
w.raise_()
exit(a.exec_())
@