<p>我也在寻找同样的东西,我不喜欢kv-lang,而且还没有确信它比用代码做任何事情都好。在</p>
<p>来自<a href="https://kivy.org/docs/api-kivy.uix.recycleview.html#kivy.uix.recycleview.RecycleView" rel="nofollow noreferrer">https://kivy.org/docs/api-kivy.uix.recycleview.html#kivy.uix.recycleview.RecycleView</a>的示例将按如下方式创建。在</p>
<pre><code>from kivy.app import App
from kivy.graphics import Color, Rectangle
from kivy.uix.recycleview import RecycleView
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.label import Label
from kivy.properties import BooleanProperty
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,
RecycleBoxLayout):
''' Adds selection and focus behaviour to the view. '''
def __init__(self, **kw):
super().__init__(**kw, default_size=(0, 28), default_size_hint=(1, None), size_hint_y=None,
touch_multiselect=True, multiselect=True, orientation='vertical')
self.bind(minimum_height=self._min)
def _min(self, inst, val):
self.height = val
class SelectableLabel(RecycleDataViewBehavior, Label):
''' Add selection support to the Label '''
index = None
selected = BooleanProperty(False)
selectable = BooleanProperty(True)
def __init__(self, **kw):
super().__init__(**kw)
self.canvas.before.clear()
with self.canvas.before:
if self.selected:
Color(.0, 0.9, .1, .3)
else:
Color(0, 0, 0, 1)
self.rect = Rectangle(size=self.size, pos=self.pos)
self.bind(size=self._update_rect, pos=self._update_rect)
def _update_rect(self, inst, value):
self.rect.pos = inst.pos
self.rect.size = inst.size
def refresh_view_attrs(self, rv, index, data):
''' Catch and handle the view changes '''
self.index = index
return super().refresh_view_attrs(rv, index, data)
def on_touch_down(self, touch):
''' Add selection on touch down '''
if super(SelectableLabel, self).on_touch_down(touch):
return True
if self.collide_point(*touch.pos) and self.selectable:
return self.parent.select_with_touch(self.index, touch)
def apply_selection(self, rv, index, is_selected):
''' Respond to the selection of items in the view. '''
self.selected = is_selected
if is_selected:
print("selection changed to {0}".format(rv.data[index]))
else:
print("selection removed for {0}".format(rv.data[index]))
self.canvas.before.clear()
with self.canvas.before:
if self.selected:
Color(.0, 0.9, .1, .3)
else:
Color(0, 0, 0, 1)
self.rect = Rectangle(size=self.size, pos=self.pos)
class RV(RecycleView):
def __init__(self, **kwargs):
super(RV, self).__init__(**kwargs)
self.add_widget(SelectableRecycleBoxLayout())
self.viewclass = 'SelectableLabel'
self.data = [{'text': str(x)} for x in range(100)]
class TestApp(App):
def build(self):
return RV()
if __name__ == '__main__':
TestApp().run()
</code></pre>
<p>KV等级的顺序很重要。不知道什么东西需要放在哪里,但是自我数据需要在添加小部件后进行修改。在</p>