My problem is that I need to create a grid of buttons based on a variable number of grid squares, and place them on a grid layout and display them on a screen using the screen manager. I know how to do this in pure python using a simple for loop, but I wrote the layout for my program in kivy language, and I don't know how to add the buttons to the grid layout, because I don't know how to correctly reference them in the kv file. The relevant python code is:
def buildMap():
index = 0
for index in range(0, numberOfGridBlocks):
mainMap.ids["Map"].add_widget(Button())
index = index + 1
buildMap()
The relevant part of the kv file is:
ScreenManagement:
MainMenuScreen:
NewGameMenuScreen:
JoinGameMenuScreen:
TutorialMenuScreen:
SettingsMenuScreen:
MapScreen:
<MenuButton>:
on_press: app.menuButtonPressed()
size_hint_y: .125
background_normal: "images/button.png"
background_down: "images/buttonPressed.png"
<Button>:
<BoxLayout>:
orientation: "vertical"
<MapLayout>:
<MapScreen>:
name: "mapScreen"
MapLayout:
id: "Map"
cols: 5
I hope this example makes it clear for you:
test.kv:
#:kivy 1.9.0
ScreenManager:
MapScreen:
<MapScreen>:
name: 'map'
GridLayout:
id: grid
cols: 1
main.py:
#!/usr/bin/env python
# -*- coding: utf-8 -*-
from kivy.app import App
from kivy.uix.screenmanager import Screen
from kivy.uix.button import Button
from kivy.clock import mainthread
NUMBER_OF_BUTTONS = 5
class MapScreen(Screen):
@mainthread
def on_enter(self):
for i in xrange(NUMBER_OF_BUTTONS):
button = Button(text="B_" + str(i))
self.ids.grid.add_widget(button)
class Test(App):
pass
Test().run()
The @mainthead decorator is needed to slightly delay the function, so the kv file gets scanned first, making the ids list viable.
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