Mercurial > libervia-desktop-kivy

comparison cagou/core/common_widgets.py @ 324:4374cb741eb5

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core (common widgets): added a DelayedBoxLayout class: DelayedBoxLayout delay the sizing, this is useful when sizing is complex and resource consuming. Thanks to https://blog.kivy.org/2019/07/a-delayed-resize-layout-in-kivy/
author Goffi <goffi@goffi.org>
date Fri, 06 Dec 2019 13:23:03 +0100
parents 772c170b47a9
children 51520ce98154
comparison
equal deleted inserted replaced
323:5bd583d00594 324:4374cb741eb5
23 from kivy.uix.label import Label 23 from kivy.uix.label import Label
24 from kivy.uix.boxlayout import BoxLayout 24 from kivy.uix.boxlayout import BoxLayout
25 from cagou.core.menu import TouchMenuItemBehaviour 25 from cagou.core.menu import TouchMenuItemBehaviour
26 from kivy import properties 26 from kivy import properties
27 from kivy.metrics import dp 27 from kivy.metrics import dp
28 from kivy.clock import Clock
28 from cagou import G 29 from cagou import G
29 from sat.core import log as logging 30 from sat.core import log as logging
30 31
31 log = logging.getLogger(__name__) 32 log = logging.getLogger(__name__)
33
34
35 class DelayedBoxLayout(BoxLayout):
36 """A BoxLayout with delayed layout, to avoid slowing down during resize"""
37 # XXX: thanks to Alexander Taylor for his blog post at
38 # https://blog.kivy.org/2019/07/a-delayed-resize-layout-in-kivy/
39
40 do_layout_event = properties.ObjectProperty(None, allownone=True)
41 layout_delay_s = properties.NumericProperty(0.2)
42
43 def do_layout(self, *args, **kwargs):
44 if self.do_layout_event is not None:
45 self.do_layout_event.cancel()
46 real_do_layout = super().do_layout
47 self.do_layout_event = Clock.schedule_once(
48 lambda dt: real_do_layout(*args, **kwargs),
49 self.layout_delay_s)
32 50
33 51
34 class Identities(object): 52 class Identities(object):
35 53
36 def __init__(self, entity_ids): 54 def __init__(self, entity_ids):