Kivy Python - How to access parent object whithout root -
i not know python, don't know if problem more kivy or python. want call parents' method on click/press. cannot access root object (attributeerror: 'issuebutton' object has no attribute 'root') nor global variable defined earlier (nameerror: name 'global_screen_manager' not defined)
i using screenmanager switch screens , using listview listadapter create these buttons want call method talking about. funny thing not button has several parents above it, gridlayout.
how can define root issuebutton @ bottom of py-file? there way call method on-detail_press issuescreen? ok use global screenmanager or there preferred way pass reference?
thanks in advance!
here's code: github.com/timokramer/repodigger
the py:
#!/usr/bin/python3 # -*- encoding: utf-8 -*- kivy.app import app kivy.uix.screenmanager import screenmanager, screen kivy.uix.listview import listitembutton kivy.properties import objectproperty, listproperty kivy.network.urlrequest import urlrequest import re class repodiggerapp(app): def build(self): root = manager() global global_screen_manager global_screen_manager = root return root class manager(screenmanager): login_screen = objectproperty(none) issue_screen = objectproperty(none) detail_screen = objectproperty(none) burndown_screen = objectproperty(none) class detailscreen(screen): def __init__(self, **kwargs): super(detailscreen, self).__init__(**kwargs) def populate_details(self): pass class burndownscreen(screen): def __init__(self, **kwargs): super(burndownscreen, self).__init__(**kwargs) class loginscreen(screen): def get_input(self, text_input): if text_input != "": self.parse_input(text_input) def parse_input(self, text_input): if re.search(".[/].", text_input): self.make_request(text_input) else: print("not valid repo!") def make_request(self, text_input): headers = {'user-agent': 'timokramer/repodigger'} req = urlrequest( 'https://api.github.com/repos/' + text_input + '/issues', on_success=self.parse_request, on_failure=self.parse_failure, on_error=self.parse_error, req_headers=headers, debug=true ) req.wait() if req.is_finished: print("request finished") def parse_request(self, req, results): print('succeeded requesting github issues') global_screen_manager.current = 'issue screen' global_screen_manager.get_screen('issue screen').build_issue_widgets(results) def parse_failure(self, req, result): print('there problem: "', result['message'], '"') def parse_error(self, req, error): print('there error: ', error) class issuescreen(screen): my_item_strings = listproperty([]) def __init__(self, **kwargs): kwargs['cols'] = 1 super(issuescreen, self).__init__(**kwargs) def build_issue_widgets(self, issues): issue in issues: if issue['state'] == 'open': self.my_item_strings.append(issue['title']) self.issues_list.item_strings = self.my_item_strings self.issues_list.adapter.data.clear() self.issues_list.adapter.data.extend(self.my_item_strings) self.issues_list._trigger_reset_populate() def on_burndown_press(self): global_screen_manager.current = 'burndown screen' def on_change_press(self): global_screen_manager.current = 'login screen' def on_detail_press(self): global_screen_manager.current = 'detail screen' global_screen_manager.get_screen('detail screen').populate_details() class issuebutton(listitembutton): def on_detail_press(self): print(self.parent) print(self.parent.parent) print(self.parent.parent.parent) print(self.parent.parent.parent.parent) print(self.parent.parent.parent.parent.parent) self.parent.parent.parent.parent.parent.on_detail_press() if __name__ == '__main__': repodiggerapp().run() the kv:
#: import repodigger repodigger #: import listadapter kivy.adapters.listadapter.listadapter <manager>: id: screen_manager login_screen: login_screen issue_screen: issue_screen detail_screen: detail_screen burndown_screen: burndown_screen canvas.before: color: rgba: .1, .1, .1, 1 rectangle: pos: self.pos size: self.size loginscreen: id: login_screen name: 'login screen' manager: screen_manager issuescreen: id: issue_screen name: 'issue screen' manager: screen_manager detailscreen: id: detail_screen name: 'detail screen' manager: screen_manager burndownscreen: id: burndown_screen name: 'burndown screen' manager: screen_manager <burndownscreen>: boxlayout: id: burndown_screen button: text: 'burndown!' <issuescreen> issues_list: issues_list boxlayout: size_hint: 1, 1 orientation: 'vertical' listview: id: issues_list size_hint: 1, .8 adapter: listadapter(data=[], cls=repodigger.issuebutton) boxlayout: orientation: 'horizontal' size_hint: 1, .05 button: size_hint: .2, 1 text: "change repository" on_press: root.on_change_press() button: size_hint: .2, 1 text: "show burndown" on_press: root.on_burndown_press() <issuebutton>: on_press: self.on_detail_press() <detailscreen>: boxlayout: id: detail_screen orientation: 'vertical' button: text: "detail view" <loginscreen>: boxlayout: id: login_screen size_hint: .7, .1 pos_hint: {'center_x': .5, 'center_y': .3} rows:1 label: text: "enter github-repo" text_size: self.width-10, self.height-10 valign: 'middle' halign: 'center' size_hint_x: .3 textinput: id: text_input on_text_validate: root.get_input(self.text) text: "" hint_text: "eg. timokramer/repodigger" text_size: self.width-10, self.height-10 valign: 'middle' halign: 'center' padding_y: ( self.height - self.line_height ) / 2 size_hint_x: .5 multiline: false button: id: ok_button on_press: root.get_input(text_input.text) text: "ok" text_size: self.width-20, self.height-20 valign: 'middle' halign: 'center' size_hint_x: .2
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