137 lines
4.2 KiB
Python
137 lines
4.2 KiB
Python
from kivy.lang import Builder
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from kivy.uix.widget import Widget
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from kivy.properties import (
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NumericProperty,
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ListProperty,
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BooleanProperty,
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)
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from kivymd.uix.label import MDLabel
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from kivymd.uix.selectioncontrol import Thumb
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class SelectionSlider(Widget):
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__events__ = ["on_select"]
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active = BooleanProperty(False)
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hint = BooleanProperty(True)
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index = NumericProperty(0) # selected index
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values = ListProperty([(0, "")]) # (value:numeric,label:string) pairs
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normalized_pos = NumericProperty(0) # slider relative pos from 0-1
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px_pos = NumericProperty(0) # actual px pos
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padding = NumericProperty("16sp")
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track_color = ListProperty([1, 1, 1, 0.3])
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thumb_color = ListProperty([0.5, 0.5, 0.5, 1])
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def __init__(self, **kwargs):
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super().__init__(**kwargs)
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self.bind(
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size=self.set_index_and_positions,
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pos=self.set_index_and_positions,
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values=self.set_index_and_positions,
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index=self.set_index_and_positions,
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)
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def set_index_and_positions(self, *_args):
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self.index = max(0, min(self.index, len(self.values) - 1))
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self.normalized_pos = self.index / (len(self.values) - 1)
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self.px_pos = self.x + self.padding + self.normalized_pos * (self.width - 2 * self.padding)
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@property
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def value(self):
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return self.values[self.index][0]
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def set_value(self, set_value): # set to closest value
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eq_value = sorted([(abs(v - set_value), i) for i, (v, l) in enumerate(self.values)])
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self.index = eq_value[0][1]
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def set_from_pos(self, pos):
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norm_value = (pos[0] - self.x - self.padding) / (self.width - 2 * self.padding)
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self.index = round(norm_value * (len(self.values) - 1))
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def on_touch_down(self, touch):
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if self.disabled or not self.collide_point(*touch.pos):
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return
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if touch.is_mouse_scrolling:
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if "down" in touch.button or "left" in touch.button:
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self.index += 1
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if "up" in touch.button or "right" in touch.button:
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self.index -= 1
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else:
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touch.grab(self)
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self.active = True
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self.set_from_pos(touch.pos)
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return True
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def on_touch_move(self, touch):
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if touch.grab_current == self:
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self.set_from_pos(touch.pos)
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return True
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def on_touch_up(self, touch):
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if touch.grab_current == self:
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self.set_from_pos(touch.pos)
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self.active = False
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self.dispatch("on_select", self.value)
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return True
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def on_select(self, value):
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pass
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KV = """
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#:import i18n katrain.core.lang.i18n
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<SelectionSlider>:
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id: slider
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canvas:
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Clear
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Color:
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rgba:
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self.track_color
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Rectangle:
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size:
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(self.width - self.padding*2, dp(4))
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pos:
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(self.x + self.padding, self.center_y - dp(4))
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Color:
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rgba:
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self.thumb_color
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Rectangle:
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size:
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((self.width-self.padding*2)*self.normalized_pos, sp(4))
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pos:
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(self.x + self.padding, self.center_y - dp(4))
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Thumb:
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id: thumb
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size_hint: None, None
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size:
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((dp(24), dp(24)) if root.active else (dp(16), dp(16)))
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pos:
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(slider.px_pos - dp(8), slider.center_y - thumb.height/2 - dp(2))
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color:
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root.thumb_color
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elevation:
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4 if root.active else 2
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MDCard:
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id: hint_box
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size_hint: None, None
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md_bg_color: [1, 1, 1, 1] if root.active else [0, 0, 0, 0]
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elevation: 4 if root.active else 0
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size:
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(max(dp(28), label.texture_size[0]+4) , dp(28))
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pos:
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(slider.px_pos - dp(9), slider.center_y - hint_box.height / 2 + dp(30))
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Label:
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id: label
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text: slider.values[slider.index][1]
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font_size: dp(12)
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lang_change_tracking: i18n._('') # for font
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halign: "center"
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color: root.thumb_color if root.active else [0, 0, 0, 0]
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"""
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Builder.load_string(KV)
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