ui_settings_storage.py

# coding: utf-8
import ui
def store_settings(view):
    '''return a dictionary suitable for storing as json or other method, which stores the value,selected_index,or text attribute of any ui component that has a stored attribute set True'''
    if getattr(view,'subviews',False):
        output={}
        for i,sv in enumerate(view.subviews):
            output_tmp=store_settings(sv)
            if output_tmp:
                if sv.name:
                    key=sv.name
                else:
                    key=i #need json keys to be str
                output[key]=output_tmp
        return output
    else:
        if getattr(view,'stored',False):
            if hasattr(view,'value'):
                return view.value
            elif hasattr(view,'selected_index'):
                return view.selected_index
            elif hasattr(view,'text'):
                return view.text
                    
def restore_settings(view, stored_value):
    '''restore settings to viee from the stored settings.  stored_value should be a dict returned from store_settings.'''
    for i,sv in enumerate(view.subviews):
        if sv.name:
            key=sv.name
        else:
            key=i
        try:
            restore_settings(sv,stored_value[key])
        except KeyError:
            pass
    if hasattr(view,'value'):
        view.value=stored_value
    elif hasattr(view,'selected_index'):
        view.selected_index=stored_value
    elif hasattr(view,'text'):
        view.text=stored_value

      
if __name__=='__main__':
    '''example usage'''
    def createView():
        main=ui.View(frame=(0,0,576,576))
        subpanel=ui.View(frame=(0,330,576,246))
        subpanel2=ui.View(frame=(0,0,576,246))
        slider=ui.Slider(frame=(10,10,150,44),name='slider1')
        slider.stored=True
        switch1=ui.Switch(frame=(10,66,70,44),name='switch1')
        switch1.stored=True
        switch2=ui.Switch(frame=(90,66,70,44)) #no name
        switch2.stored=True
        switch3=ui.Switch(frame=(10,120,70,44),name='switch3') #not stored
        tf1=ui.TextField(frame=(10,180,250,50),name='textfield')
        tf1.stored=True
        main.add_subview(subpanel)
        subpanel.add_subview(slider)
        subpanel.add_subview(switch1)
        subpanel.add_subview(switch2)
        subpanel.add_subview(switch3)
        subpanel.add_subview(tf1)
        slider2=ui.Slider(frame=(10,10,150,44),name='slider1')
        slider2.stored=True
        subpanel2.add_subview(slider2)
        main.add_subview(subpanel2)
        return main
    v=createView()
    v.present('sheet')
    v.wait_modal()
    saved=store_settings(v)
    import yaml
    saved_yaml=yaml.dump(saved)
    #... 
    v2=createView()
    restore_settings(v2,yaml.load(saved_yaml))
    v2.present('sheet')