我正在创建按钮,on_press可以移动另一个按钮。 这是它的视图...
我无法发布图片,但是我给出了链接
我正在更改按钮事件的pos_hint
属性,但该小部件并未随之移动。实际上它甚至没有移动一个像素:)
是的,我知道我可以更改widget.x
和widget.y
属性来移动小部件,但是我想知道是否有可能使用pos_hint
进行更改
编辑:我正在python 3.x和debain OS上使用
我尝试将button.pos_hint
分配给字典,然后对其进行更改,然后再次将其分配给button.pos_hint
这就是我在说的
new_dict = some_button.pos_hint
#changing new_dict here...
some_button.pos_hint = new_dict
main.py->
from kivy.app import App
from kivy.uix.label import Label
from kivy.uix.textinput import TextInput
from kivy.uix.gridlayout import GridLayout
from kivy.uix.button import Button
from kivy.properties import ObjectProperty
from kivy.uix.widget import Widget
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import DictProperty
class Login2(FloatLayout):
btn_demo = ObjectProperty(None)
def just(self, arg):
if arg == "x++":
print(self.btn_demo.pos_hint)
if "x" in self.btn_demo.pos_hint.keys():
self.btn_demo.pos_hint["x"] += 0.1
else:
self.btn_demo.pos_hint["x"] = 0
elif arg == "top--":
print(self.btn_demo.pos_hint)
if "top" in self.btn_demo.pos_hint.keys():
self.btn_demo.pos_hint["top"] -= 0.1
else:
self.btn_demo.pos_hint["top"] = 0
class MainApp(App):
def build(self):
return Login2()
if __name__ == "__main__":
MainApp().run()
kv文件->
<Login2>
btn_demo:btn_demo
GridLayout:
cols:1
size: root.width,root.height
FloatLayout:
Button:
pos_hint:{"top":1,"x":0.3}
size_hint:0.2,0.2
id:btn_demo
text:"Demo"
GridLayout:
size_hint: 1,0.2
cols:6
Button:
text:"x++"
on_press:root.just("x++")
Button:
text:"x--"
on_press:root.just("x--")
Button:
text:"y++"
on_press:root.just("y++")
Button:
text:"y--"
on_press:root.just("y--")
Button:
text:"top++"
on_press:root.just("top++")
Button:
text:"top--"
on_press:root.just("top--")
Button:
text:"bot++"
on_press:root.just("bot++")
Button:
text:"bot--"
on_press:root.just("bot--")
Button:
text:"rgt++"
on_press:root.just("rgt++")
Button:
text:"rgt--"
on_press:root.just("rgt--")
Button:
text:"lef++"
on_press:root.just("lef++")
Button:
text:"lef--"
on_press:root.just("lef--")
我如何使用pos_hint
来更改按钮小部件的位置?
解决方案::::> 调用layout_instance.do_layout()以使更改显示在屏幕上... 就是这样:
#change co-ordinates you want on widget_instance
#then call widget_instance's parent layout's do_layout() method
答案 0 :(得分:0)
您应该在"right"
中使用"x"
而不是pos_hint
此示例有效:
from kivy.app import App
from kivy.lang import Builder
KV = """
FloatLayout:
Button:
text: "hello"
id: hello
size_hint: 0.1, 0.1
pos_hint: {"top":0.3, "right": 0.5}
on_release:
world.pos_hint = {"top":0.1, "right": 0.1}
Button:
id: world
text: "world"
size_hint: 0.1, 0.1
pos_hint: {"top":0.5, "right": 0.9}
on_release:
world.pos_hint = {"top":0.9, "right": 0.9}
"""
class MyApp(App):
def build(self):
return Builder.load_string(KV)
MyApp().run()