python - how to pass info from one widget to another in kv kivy -
i want set text of label when button pressed, problem being son separate screens , therefore in separate widgets in kv file. code have change is:
<screenone>: boxlayout: textinput: id: player_name button: text: "continue" on_release: root.manager.current = "screen2" root.ids.final_playername.text=player_name.text <screentwo>: gridlayout: label: text: "player" id: final_playername the error is:
traceback (most recent call last): file "c:\users\rayne\desktop\python exp\noughts , crosses kivy sm\nandx.py", line 36, in <module> nandxapp().run() file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\app.py", line 828, in run runtouchapp() file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\base.py", line 504, in runtouchapp eventloop.window.mainloop() file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\core\window\window_sdl2.py", line 663, in mainloop self._mainloop() file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\core\window\window_sdl2.py", line 405, in _mainloop eventloop.idle() file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\base.py", line 342, in idle self.dispatch_input() file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\base.py", line 327, in dispatch_input post_dispatch_input(*pop(0)) file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\base.py", line 293, in post_dispatch_input wid.dispatch('on_touch_up', me) file "kivy\_event.pyx", line 718, in kivy._event.eventdispatcher.dispatch (kivy\_event.c:8191) file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\uix\behaviors\button.py", line 179, in on_touch_up self.dispatch('on_release') file "kivy\_event.pyx", line 714, in kivy._event.eventdispatcher.dispatch (kivy\_event.c:8146) file "kivy\_event.pyx", line 1225, in kivy._event.eventobservers.dispatch (kivy\_event.c:14035) file "kivy\_event.pyx", line 1109, in kivy._event.eventobservers._dispatch (kivy\_event.c:12816) file "c:\users\rayne\appdata\local\programs\python\python36-32\lib\site-packages\kivy\lang\builder.py", line 64, in custom_callback exec(__kvlang__.co_value, idmap) file "c:\users\rayne\desktop\python exp\noughts , crosses kivy sm\nandx.kv", line 51, in <module> root.ids.final_playername.text=player_name.text file "kivy\properties.pyx", line 839, in kivy.properties.observabledict.__getattr__ (kivy\properties.c:12654) attributeerror: 'super' object has no attribute '__getattr__' in .py file have minimum classes screens, i´m trying keep simple under advice , in kv file. can newbie python learner set up? thank you
please refer snippet , example below details.
snippet
button: size_hint: (.2, .08) text: "continue" on_release: root.manager.ids.screen_two.ids.final_playername.text = player_name.text root.manager.current = "screen2" example
nandxapp.py
from kivy.app import app kivy.uix.widget import widget kivy.uix.screenmanager import screenmanager, screen kivy.config import config config.set("graphics", "width", "400") config.set("graphics", "height", "570") config.set("graphics", "borderless", "0") config.set("graphics", "resizable", "0") config.set("kivy", "window_icon", "nyc.ico") class manager(screenmanager): pass class screenone(screen, widget): pass class screentwo(screen, widget): pass class screenthree(screen): pass class nandxapp(app): def build(self): self.title = "noughts , crosses" return manager() if __name__ == "__main__": nandxapp().run() nandx.kv
#:kivy 1.10.0 <manager>: screenone: id: screen_one screentwo: id: screen_two screenthree: id: screen_three <screenone>: name: "screen1" gridlayout: size_hint: (.5, .5) pos_hint: {"center_x":0.5,"center_y":0.6} rows: 3 padding: 20 label: size_hint: (.2, .2) text: "please enter\nyour name:" font_size: 30 halign: 'center' valign: 'middle' textinput: size_hint: (.2, .06) cursor_blink: true font_size: 20 multiline: 0 id: player_name button: size_hint: (.2, .08) text: "continue" on_release: root.manager.ids.screen_two.ids.final_playername.text = player_name.text root.manager.current = "screen2" <screentwo>: name: "screen2" gridlayout: cols: 3 size: root.size spacing: 10 padding: 10 button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("topleft") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("topmiddle") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("topright") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("centerleft") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("centermiddle") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("centerright") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("bottomleft") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("bottommiddle") button: background_normal: ("blank.png") # on_release: root.methodforbuttonpress ("bottomright") button: background_normal: ("x.png") gridlayout: rows: 2 label: text: "top label" label: text: "bottom label" button: background_normal: ("circle.png") gridlayout: rows: 2 label: text: "player" id: final_playername label: text: "score:" label: text: "" gridlayout: rows: 2 label: text: "computer" label: text: "score:" <screenthree>: name: "screen3" output
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