元素的大小不会随着Kivy中应用程序的加载而更新 [英] Elements' sizes don't update on application loading in Kivy
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问题描述
我有on_size()
事件,当我调整窗口大小时它可以工作,但是我无法使其在正确加载应用程序时起作用(它可以工作,但并非一定如此):
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):
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:
#: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
也许有一些错误吗?
推荐答案
当我根据班级中的标签和按钮更新班级孩子的身高时,我向他们添加了on_size
事件:
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:
def on_size(self, *args):
self.parent.parent.on_size()
class SideLabel(Label):
on_size = on_size
class SideButton(Button):
on_size = on_size
我也已经在kv中的这些类上替换了Buttons和Labels.现在看来可以正常工作了.
And also I have replaced Buttons and Labels on these classes in kv. It seems to work correctly now.
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