python and pyqt4

[Xristos Xristoou]

i will want to create a simple python script with pyqt4 and Q designer where the user put a number (line_edit) and if that number is something the user take back three new codes(lineEdit_2,lineEdit_3,lineEdit_4) and if user press ok(buttonBox) then plugin do something else in the some GUI.
for that i create a new additional pushButton in Qdesigner and i create additional def function(run1) for execute code for pushButton.


first i add new pushbutton in __init__ :
def __init__(self, iface):
    self.dlg = pluginDialog()
    self.dlg.pushButton.clicked.connect(self.run1)

plugin work without error but dont show me the codes (lineEdit_2,lineEdit_3,lineEdit_4) in the plugin window if i press 
pushbutton
any idea ? my python code :

def run1(self):
    distance = str(self.dlg.lineEdit.text())
    if distance==0:
        area1='some'
        area2='hello'
        area3='world'
    self.dlg.lineEdit_2.setText(str(area1))
    self.dlg.lineEdit_3.setText(str(area2))
    self.dlg.lineEdit_4.setText(str(area3))



def run(self):
    self.dlg.show()
    result = self.dlg.exec_()

    if result:
        pass

and i try to replace run1 with :

def run1(self):
    self.dlg.show()
    result = self.dlg.exec_()
    if result:
        distance = str(self.dlg.lineEdit.text())
        if distance==0:
            area1='some'
            area2='hello'
            area3='world'
        self.dlg.lineEdit_2.setText(str(area1))
        self.dlg.lineEdit_3.setText(str(area2))
        self.dlg.lineEdit_4.setText(str(area3))
        pass

but no change.