[英]Elements' sizes don't update on application loading in Kivy
I have on_size()
event, it works when I resize window, but I can't make it work on application loading correctly (it works, but not like it must): 我有
on_size()
事件,它在我调整窗口大小时起作用,但我不能使它在正确的应用程序加载上工作(它工作,但不是必须):
from random import random, randint
import kivy
kivy.require('1.8.0')
from kivy.config import Config
Config.set('graphics', 'fullscreen', '0')
Config.set('graphics', 'width', 640)
Config.set('graphics', 'height', 480)
Config.set('graphics', 'position', 'custom')
Config.set('graphics', 'top', 40)
Config.set('graphics', 'left', 40)
from kivy.app import App
from kivy.uix.layout import Layout
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.label import Label
from kivy.graphics import Color, Line, Rectangle
class Main(BoxLayout):
side_padding = 20
def __init__(self, **kwargs):
super(Main, self).__init__(**kwargs)
self.size = (0, 0) # Doesn't help.
self.on_size() # Doesn't help.
def on_size(self, *args):
left, middle, right = self.ids.left, self.ids.middle, self.ids.right
left.width = max([x.texture_size[0] for x in left.children]) + self.side_padding
right.width = max([x.texture_size[0] for x in right.children]) + self.side_padding
available_space = self.width - left.width - right.width
if available_space > self.height:
middle.size = (self.height, self.height)
extra = (self.width - self.height - left.width - right.width) // 2
left.width += extra
right.width += extra
else:
middle.size = (available_space, available_space)
class SidePanel(BoxLayout):
def __init__(self, **kwargs):
super(SidePanel, self).__init__(**kwargs)
class GameField(Layout):
def __init__(self, **kwargs):
super(GameField, self).__init__(**kwargs)
self.array_size = randint(4, 8)
self.bind(pos=self.update, size=self.update)
self.update()
def update(self, *args):
s_padding = 1 / 16
s_sq_size = 1 - 2 * s_padding
self.canvas.clear()
with self.canvas:
block_size = self.width / self.array_size
sq_size = block_size * s_sq_size
padding = block_size * s_padding
Color(1, 1, 1)
for j in range(self.array_size):
for i in range(self.array_size):
Rectangle(pos=(self.x + padding + i * block_size, self.y + padding + j * block_size),
size=(sq_size, sq_size))
for i in range(self.array_size + 1):
shift = self.width * i / self.array_size
Line(points=(self.x, self.y + shift, self.x + self.width, self.y + shift))
Line(points=(self.x + shift, self.y, self.x + shift, self.y + self.height))
def on_touch_up(self, touch):
self.array_size = randint(4, 8)
self.update()
class Application(App):
def build(self):
return Main()
if __name__ == '__main__':
Application().run()
*.kv: * .kv:
#:kivy 1.8.0
<Main>:
orientation: 'horizontal'
canvas:
Color:
rgb: 1, 1, .9
Rectangle:
pos: self.pos
size: self.size
SidePanel:
id: left
Label:
size_hint_y: None
color: 0, 0, 0, 1
text: 'Score'
Label:
color: 0, 0, 0, 1
text: 'Event log log log loooooooooog'
Label:
color: 0, 0, 0, 1
text: 'Event log log log\n123'
Label:
color: 0, 0, 0, 1
text: '35mdbj65 qewr'
Label:
color: 0, 0, 0, 1
text: '3qht6ju7ustju'
GameField:
id: middle
SidePanel:
id: right
Button:
size_hint_y: None
text: 'Menu'
Label:
color: 0, 0, 0, 1
text: 'Bonuses bonuses'
<SidePanel>:
orientation: 'vertical'
size_hint_x: None
size: self.size
<GameField>:
pos_hint: {'center_y': .5}
size_hint: None, None
canvas.before:
Color:
rgb: .9, .9, .9
Rectangle:
pos: self.pos
size: self.size
Maybe there is some mistake? 也许有一些错误?
As I update my class's children's sizes depending on labels and buttons inside of it, I've added to them on_size
event: 当我根据其中的标签和按钮更新我班级的孩子的大小时,我已经添加了
on_size
事件:
def on_size(self, *args):
self.parent.parent.on_size()
class SideLabel(Label):
on_size = on_size
class SideButton(Button):
on_size = on_size
And also I have replaced Buttons and Labels on these classes in kv. 而且我已经用kv替换了这些类上的Buttons和Labels。 It seems to work correctly now.
它似乎现在正常工作。
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