[PyQt] Help with Login Dialog / QThread issues

[Baz Walter]

On 05/08/11 17:46, Eric Frederich wrote:
> Any takers?
>
> On Thu, Jul 7, 2011 at 12:38 PM, Eric Frederich
> <eric.frederich at gmail.com>  wrote:
>> Hello,
>>
>> I am trying to create a login dialog for my application.
>> Logging in can take a couple of seconds so I wanted to show a progress
>> bar during the login process.
>> I think that for my QProgressBar to animate during this time, I need
>> to log in on a different thread.  Is this true?
>>
>> So, below I have what I think is a working example.
>> Is there a better way to call QDialog's accept slot when the login
>> thread is finished than how I am doing it via functools.partial?
>> It seems a bit hacky.
>>
>>
>>
>>
>> from functools import partial
>>
>> class LoginThread(QThread):
>>     def __init__(self, username, password, parent=None):
>>         super(LoginThread, self).__init__(parent)
>>         self.username = username
>>         self.password = password
>>     def run(self):
>>         LOGIN(
>>             self.username,
>>             self.password,
>>         )
>>
>> class LoginDialog(QDialog, Ui_LoginDialog):
>>
>>     def __init__(self, *args, **kwargs):
>>         super(LoginDialog, self).__init__(*args, **kwargs)
>>         self.setupUi(self)
>>         self.progressbar.hide()
>>
>>     def accept(self):
>>         self.progressbar.setMinimum(0)
>>         self.progressbar.setMaximum(0)
>>         self.progressbar.show()
>>         self.lt = LoginThread(
>>             str(self.username_edit.text()),
>>             str(self.password_edit.text())
>>         )
>>         self.connect(self.lt, SIGNAL('finished()'),
>> partial(QDialog.accept, self))
>>         self.lt.start()

it's hard to tell from the limited code you've posted why you need to 
override accept(). why not just create a handler for the clicked() 
signal of the ok button (or whatever it is) and then connect the 
thread's finished() signal directly to the dialog's accept() slot?