Update TitleSelectOne values list based on selected value from another TitleSelectOne widget

[Miroslaw Malinowski]

Hi

I would like to update values list of TitleSelectOne widget based on selected value from another TitleSelectOne widget. I've tried to use value_changed_callback option but no luck so far.

I don't know if the list is not updated or maybe the form is not refreshed with new values.

Could anyone tell me what I'm missing, the code I've got at the moment below.

import npyscreen

def update_product_options(widget):

    widget.parent.parentApp.getForm('MAIN').product_options = ['NPSA','NPSHH']

    widget.parent.parentApp.getForm('MAIN').display()

class UnipatchMainForm(npyscreen.Form):

    def afterEditing(self):

        self.parentApp.setNextForm(None)

    def create(self):

#Add widgets to collect info

        self.product_options = ['...']

        self.product_name = self.add(npyscreen.TitleSelectOne, scroll_exit=True, max_height=5, name='Product:', values = ['Sonet', 'Durabill', 'Gina','Clava'],value_changed_callback=update_product_options)

        self.product_value = self.add(npyscreen.TitleSelectOne, max_height=5,scroll_exit=True,name='Product Value:', values=self.product_options)

class UnipatchApp(npyscreen.NPSAppManaged):

    def onStart(self):

        self.addForm('MAIN', UnipatchMainForm, name='Unipatch')

if __name__ == '__main__':

    UnipatchApp = UnipatchApp().run()

Thanks

[Nicholas Cole]

That may be a bug. I'll look this evening!

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[Miroslaw Malinowski]

Thanks, 

When I've been debugging it using PyDev debugger it looks like TitleSelectOne.value is not a pointer to my  self.product_options list, 

it looks more like variable "value" has been created based on initial values of my  self.product_options list but as it's not a pointer I can't update the list.

I can confirm it by changing my function to update the values list directly

def update_product_options(widget):

    widget.parent.parentApp.getForm('MAIN').product_value.values = ['NPSA','NPSHH']

    widget.parent.parentApp.getForm('MAIN').display()

I also have another question, how I can do a callback based on selected option, as at the moment the callback function is called every time I move between the values, I would like it to be called only when value is selected.

Thanks

[Miroslaw Malinowski]

I found work around the problem by updating widget.parent.parentApp.getForm('MAIN').product_value.values with deepcopy.

I tough it would be good to post example so other can see my solution if they have a similar problem, 

I had one more very minor problem when value is set to list with single value, it took me a while to figure it out.

def update_product_options(widget):

    value = widget.value

    values = []

    if widget.value:

        value = widget.value[0]

        if value == 0:

            values = ['7.4.0','7.5.0']

        elif value == 1:

            values = ['4.0.0','4.1.0']

        elif value == 2:

            values = ['1.2.0','1.3.0']

        elif value == 3:

            values = ['2.2.0','2.3.0']

        widget.parent.parentApp.getForm('MAIN').product_value.values = copy.deepcopy(values)

        widget.parent.parentApp.getForm('MAIN').display()