193 lines
6.4 KiB
Python
193 lines
6.4 KiB
Python
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# -*- coding: utf-8 -*-
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from kivy.animation import Animation
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from kivy.clock import Clock
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from kivy.core.window import Window
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from kivy.lang import Builder
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from kivy.garden.recycleview import RecycleView
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from kivy.metrics import dp
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from kivy.properties import NumericProperty, ListProperty, OptionProperty, \
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StringProperty
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from kivy.uix.behaviors import ButtonBehavior
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from kivy.uix.boxlayout import BoxLayout
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import kivymd.material_resources as m_res
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from kivymd.theming import ThemableBehavior
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Builder.load_string('''
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#:import STD_INC kivymd.material_resources.STANDARD_INCREMENT
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<MDMenuItem>
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size_hint_y: None
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height: dp(48)
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padding: dp(16), 0
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on_release: root.parent.parent.parent.parent.dismiss() # Horrible, but hey it works
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MDLabel:
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text: root.text
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theme_text_color: 'Primary'
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<MDMenu>
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size_hint: None, None
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width: root.width_mult * STD_INC
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key_viewclass: 'viewclass'
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key_size: 'height'
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<MDDropdownMenu>
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FloatLayout:
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id: fl
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MDMenu:
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id: md_menu
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data: root.items
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width_mult: root.width_mult
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size_hint: None, None
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size: 0,0
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canvas.before:
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Color:
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rgba: root.theme_cls.bg_light
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Rectangle:
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size: self.size
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pos: self.pos
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''')
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class MDMenuItem(ButtonBehavior, BoxLayout):
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text = StringProperty()
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class MDMenu(RecycleView):
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width_mult = NumericProperty(1)
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class MDDropdownMenu(ThemableBehavior, BoxLayout):
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items = ListProperty()
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'''See :attr:`~kivy.garden.recycleview.RecycleView.data`
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'''
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width_mult = NumericProperty(1)
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'''This number multiplied by the standard increment (56dp on mobile,
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64dp on desktop, determines the width of the menu items.
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If the resulting number were to be too big for the application Window,
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the multiplier will be adjusted for the biggest possible one.
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'''
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max_height = NumericProperty()
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'''The menu will grow no bigger than this number.
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Set to 0 for no limit. Defaults to 0.
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'''
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border_margin = NumericProperty(dp(4))
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'''Margin between Window border and menu
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'''
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ver_growth = OptionProperty(None, allownone=True,
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options=['up', 'down'])
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'''Where the menu will grow vertically to when opening
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Set to None to let the widget pick for you. Defaults to None.
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'''
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hor_growth = OptionProperty(None, allownone=True,
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options=['left', 'right'])
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'''Where the menu will grow horizontally to when opening
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Set to None to let the widget pick for you. Defaults to None.
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'''
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def open(self, *largs):
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Window.add_widget(self)
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Clock.schedule_once(lambda x: self.display_menu(largs[0]), -1)
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def display_menu(self, caller):
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# We need to pick a starting point, see how big we need to be,
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# and where to grow to.
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c = caller.to_window(caller.center_x,
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caller.center_y) # Starting coords
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# ---ESTABLISH INITIAL TARGET SIZE ESTIMATE---
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target_width = self.width_mult * m_res.STANDARD_INCREMENT
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# If we're wider than the Window...
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if target_width > Window.width:
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# ...reduce our multiplier to max allowed.
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target_width = int(
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Window.width / m_res.STANDARD_INCREMENT) * m_res.STANDARD_INCREMENT
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target_height = sum([dp(48) for i in self.items])
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# If we're over max_height...
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if 0 < self.max_height < target_height:
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target_height = self.max_height
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# ---ESTABLISH VERTICAL GROWTH DIRECTION---
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if self.ver_growth is not None:
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ver_growth = self.ver_growth
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else:
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# If there's enough space below us:
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if target_height <= c[1] - self.border_margin:
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ver_growth = 'down'
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# if there's enough space above us:
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elif target_height < Window.height - c[1] - self.border_margin:
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ver_growth = 'up'
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# otherwise, let's pick the one with more space and adjust ourselves
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else:
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# if there's more space below us:
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if c[1] >= Window.height - c[1]:
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ver_growth = 'down'
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target_height = c[1] - self.border_margin
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# if there's more space above us:
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else:
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ver_growth = 'up'
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target_height = Window.height - c[1] - self.border_margin
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if self.hor_growth is not None:
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hor_growth = self.hor_growth
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else:
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# If there's enough space to the right:
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if target_width <= Window.width - c[0] - self.border_margin:
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hor_growth = 'right'
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# if there's enough space to the left:
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elif target_width < c[0] - self.border_margin:
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hor_growth = 'left'
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# otherwise, let's pick the one with more space and adjust ourselves
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else:
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# if there's more space to the right:
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if Window.width - c[0] >= c[0]:
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hor_growth = 'right'
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target_width = Window.width - c[0] - self.border_margin
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# if there's more space to the left:
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else:
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hor_growth = 'left'
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target_width = c[0] - self.border_margin
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if ver_growth == 'down':
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tar_y = c[1] - target_height
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else: # should always be 'up'
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tar_y = c[1]
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if hor_growth == 'right':
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tar_x = c[0]
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else: # should always be 'left'
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tar_x = c[0] - target_width
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anim = Animation(x=tar_x, y=tar_y,
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width=target_width, height=target_height,
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duration=.3, transition='out_quint')
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menu = self.ids['md_menu']
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menu.pos = c
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anim.start(menu)
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def on_touch_down(self, touch):
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if not self.ids['md_menu'].collide_point(*touch.pos):
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self.dismiss()
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return True
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super(MDDropdownMenu, self).on_touch_down(touch)
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return True
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def on_touch_move(self, touch):
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super(MDDropdownMenu, self).on_touch_move(touch)
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return True
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def on_touch_up(self, touch):
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super(MDDropdownMenu, self).on_touch_up(touch)
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return True
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def dismiss(self):
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Window.remove_widget(self)
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