Color widget, first steps (2)
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from kivy.app import App from kivy.base import runTouchApp from kivy.lang import Builder from kivy.uix.widget import Widget from kivy.properties import ( ListProperty, NumericProperty, BoundedNumericProperty ) from kivy.core.window import Window from colorsys import hls_to_rgb KV = ''' BoxLayout orientation:'vertical' ColourWidget id: color_widget s_slider: slider BoxLayout size_hint_y:0.2 Label size_hint_x:0.2 text: 'saturation:' Slider id: slider min:0 max:1 value:color_widget.saturation on_value: if color_widget.saturation!= args[1]: color_widget.saturation = args[1] <ColourWidget>: canvas: Color: rgb: self.colour Rectangle: pos: self.pos size: self.size ''' class ColourApp(App): def build(self): self.root = Builder.load_string(KV) class MyProperty(BoundedNumericProperty): def __init__(self, *args, my_min=0, my_max=1, **kwargs): super().__init__(*args, min=my_min, max=my_max, errorhandler=lambda x: min(max(x, my_min), my_max), **kwargs) class ColourWidget(Widget): colour = ListProperty([0, 0, 0]) saturation = MyProperty( 0.1, my_min=0, my_max=1.) def slider_error_value_handler(self, instance, val): new_val = val if val> 1.: new_val = 1. elif val<0.: new_val = 0. return new_val def __init__(self, **kwargs): super().__init__(**kwargs) Window.bind(mouse_pos=self.on_mouse) def on_mouse(self,instance, value): self.mouse = value self.update_colour(value) def update_colour(self, value): x, y = value x /= Window.size[0] y /= Window.size[1] # self.colour = hls_to_rgb(0.7+x/5, 0.1+y/10, 0.2) self.colour = hls_to_rgb(0.7+x/5, 0.1+y/8, self.saturation) def on_touch_down(self, touch): if touch.is_mouse_scrolling: if touch.button == 'scrolldown': self.saturation +=0.01 elif touch.button == 'scrollup': self.saturation -=0.01 self.update_colour(self.mouse) super(ColourWidget, self).on_touch_down(touch) ColourApp().run()
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