Close or hide window ? Which the best ?

[A Former User]

Hello,

I have a window when clicked on a button launches another window. I want to close the first window and to show only the second window.
I tried close and hide methods and they work both for me but I want to know which the best and what is the difference between the two methods.
Here is my code :

class TRANUSInterfaceVariationDialog(QtGui.QDialog, FORM_CLASS):
    def __init__(self,project,parent=None):
        """Constructor."""

        super(TRANUSInterfaceVariationDialog, self).__init__(parent)
        self.setupUi(self)
        self.launch_btn.clicked.connect(self.launch_TRANUS_variation)
        
    def launch_TRANUS_variation(self):
        
        dialog = launch_variation_dialog.LaunchVariationDialog(self.folder,self.base_scenario.code,self.tranus_binaries,parent=self)
        #self.close()
        self.hide()
        dialog.show()
        result = dialog.exec_()
        

[A Former User]

Hi! hide keeps the window object in memory, so you can show it again later. close destroys it.

[A Former User]

Hello @Wieland,

In my case, I am integrating my interface as a plugin in QGIS. So, when closing all the windows and launching from QGIS, the main window is displayed. I don't really know If I need to destroy in this case.
Thanks for your reply.