Kivy不会返回ColorPicker的颜色值

Question

我在弹出的ColorPicker中遇到q问题。 按'选择并关闭'后，我需要颜色值（不带＃的十六进制代码）返回，但我只打印了两次白色颜色值。运行代码后运行 。

我的代码（Python的3.6，kivy 1.9.1）：

from kivy.lang import Builder 
from kivy.app import App 
from kivy.uix.popup import Popup 
from kivy.uix.boxlayout import BoxLayout 
from kivy.uix.colorpicker import ColorPicker 

Builder.load_string(''' 
<PaintWindow>: 
    orientation: 'vertical' 

<PopupColor>: 
    title: 'Pick a Color' 
    size_hint: 1.0, 0.6 
    id: popupcolor 

    BoxLayout: 
     orientation: 'vertical' 

     ColorPicker: 
      size_hint: 1.0, 1.0 

     Button: 
      text: 'PICK AND CLOSE' 
      color: 0.435, 0.725, 0.56, 1 
      background_color: 0, 0.26, 0.27, 1 
      size_hint: 1.0, 0.2 
      on_press: popupcolor.on_press_dismiss() 
''') 


class PaintWindow(BoxLayout): 
    pass 


class PopupColor(Popup): 
    def on_press_dismiss(self, *args): 
     self.dismiss() 
     return False 


class PopupRun(App): 
    def build(self): 
     main_window = PaintWindow() 
     popup = PopupColor() 
     popup_color = ColorPicker() 
     popup.open() 

     def on_color(instance, value): 
      print("RGBA = ", str(value)) 
      print("HSV = ", str(instance.hsv)) 
      print("HEX = ", str(instance.hex_color)) 
      hex_color = str(instance.hex_color) 
      # Return hex color code without '#' 
      return hex_color[1:] 

     # Return valye after change color in ColorPicker 
     popup_color.bind(color=on_color) 

     return main_window 


PopupRun().run() 

Answer 1

您可以通过颜色拾取到辞退方法。
首先给你的颜色拾取在KV一个id：

ColorPicker: 
    id: colorpicker 
    size_hint: 1.0, 1.0 

然后将它传递给on_press方法：

Button: 
    text: 'PICK AND CLOSE' 
    color: 0.435, 0.725, 0.56, 1 
    background_color: 0, 0.26, 0.27, 1 
    size_hint: 1.0, 0.2 
    on_press: popupcolor.on_press_dismiss(colorpicker) 

而在蟒蛇：

class PopupColor(Popup): 
    def on_press_dismiss(self, colorpicker, *args): 
     self.dismiss() 
     color = str(colorpicker.hex_color)[1:] 
     print(color)