Пример main.kv
Код: Выделить всё
#: import Effect main.Effect
ManagerWidget:
StartScreen:
Page2Screen:
:
name: 'startscreen'
BoxLayout:
orientation: 'vertical'
canvas.before:
Color:
rgba: 1,1,1,1
Rectangle:
pos: self.pos
size: self.size
BoxLayout:
size_hint_y: .1
Button:
id: btn1
text: 'Simulation of desired "prev_key" function via overscroll event'
on_release: root.prev_key ( )
Button:
id: btn2
text: 'Simulation of desired "next_key" function via overscroll event'
on_release: root.next_key ( )
ScrollView:
id: scroller
effect_cls: Effect
size_hint: 1, 1
do_scroll_x: False
GridLayout:
id: container
cols: 5
spacing: 2
size_hint_y: None
height: self.minimum_height
BoxLayout:
size_hint_y: .1
Button:
text: 'Go to Page 2'
on_release: root.manager.current = 'page2'
:
name: 'page2'
BoxLayout:
padding: 5
spacing: 5
orientation: 'vertical'
Label:
text: 'Placeholder 1'
Label:
text: 'Placeholder 2'
Label:
text: 'Placeholder 3'
BoxLayout:
size_hint_y: .3
Button:
text: 'Back to main screen'
on_release:
root.manager.current = 'startscreen'
Код: Выделить всё
from kivy.app import App
from kivy.uix.screenmanager import ScreenManager, Screen
from kivy.uix.textinput import TextInput
from kivy.effects.dampedscroll import DampedScrollEffect
from kivy.metrics import dp
from kivy.clock import Clock
from time import time
class CallControl:
def __init__ ( self, max_call_interval ):
self._max_call_interval = max_call_interval
self._last_call = time ( )
def __call__ ( self, function ):
def wrapped ( *args, **kwargs ):
now = time ( )
if now - self._last_call > self._max_call_interval:
self._last_call = now
function ( *args, **kwargs )
return wrapped
class Effect ( DampedScrollEffect ):
def __init__ ( self, *args, **kwargs ):
super ( Effect, self ).__init__ ( **kwargs )
def on_overscroll ( self, *args ):
self.args = args
if self.overscroll < -100:
self.scrollup ( )
elif self.overscroll > 100:
self.scrolldown ( )
@CallControl ( max_call_interval = 1 )
def scrollup ( self ):
print ( 'How to update the Scrollview widgets? (i.e. the prev_key method in StartScreen )' )
# StartScreen.prev_key ( self.overscroll ) ???
@CallControl ( max_call_interval = 1 )
def scrolldown ( self ):
print ( 'How to update the Scrollview widgets? (i.e. the next_key method in StartScreen )' )
# StartScreen.next_key ( self.overscroll ) ???
class StartScreen ( Screen ):
def __init__ ( self, **kwargs ):
super( StartScreen, self).__init__( **kwargs )
# Create some artificial data for this sample code to fill the GridLayout container
self.num = '11'
self.data = { }
self.keys = [ ]
lines = [ ]
for k in range ( 10, 15 ):
for v in range ( 25 ):
lines.append ( 'ONE,Key %d,%d,yxz,,white,gray,yellow,red,green,\n' % ( k, k+v ) )
self.data[ str ( k ) ] = lines
self.keys.append ( str ( k ) )
lines = [ ]
self.colour_mapping = { 'white' : ( 1,1,1,1, ),
'gray' : ( 0,0,0,.2 ),
'green' : ( 0,1,0,.3 ),
'red' : ( 1,0,0,.3 ),
'yellow' : ( 1,1,0,.3 ) }
Clock.schedule_once ( self.finish_init, 0 )
def finish_init ( self, dt ):
self.update_container ( )
# @classmethod ? But how to call self.update_container then? And the keys list is empty anyway... hmpf...
def prev_key ( self, *args ):
idx = self.keys.index ( self.num )
if idx in ( 0, len ( self.keys ) ):
print ( 'no more keys in the dict...' )
self.num = self.keys[ idx ]
else:
self.num = self.keys[ idx - 1 ]
self.update_container ( )
def next_key ( self, *args ):
idx = self.keys.index ( self.num )
try:
self.num = self.keys[ idx + 1 ]
except IndexError:
print ( 'no more keys in the dict...' )
self.num = self.keys[ idx ]
self.update_container ( )
def update_container ( self ):
hgt_row = 35
fnt_size = 15
self.ids.container.clear_widgets ( )
for line in self.data.get ( self.num ):
d1, d2, d3, d4, empty, bg1,bg2,bg3,bg4,bg5, nl = line.split( ',' )[ : ]
colour1 = self.colour_mapping.get ( bg1 )
colour2 = self.colour_mapping.get ( bg2 )
colour3 = self.colour_mapping.get ( bg3 )
colour4 = self.colour_mapping.get ( bg4 )
colour5 = self.colour_mapping.get ( bg5 )
in_c1 = TextInput ( height = hgt_row,\
text = d1,\
font_size = dp ( fnt_size ),\
size_hint = ( .1, None ),\
background_color = colour1 )
in_c2 = TextInput ( height = hgt_row,\
text = d2,\
font_size = dp ( fnt_size ),\
size_hint = ( .12, None ),\
background_color = colour2 )
in_c3 = TextInput ( height = hgt_row,\
text = d3,\
size_hint = ( .07, None ),\
background_color = colour3 )
in_c4 = TextInput ( height = hgt_row,\
size_hint = ( .09, None ),\
text = d4,\
background_color = colour4 )
in_c5 = TextInput ( height = hgt_row,\
size_hint = ( .7, None ),\
hint_text = empty,\
background_color = colour5 )
self.ids.container.add_widget ( in_c1 )
self.ids.container.add_widget ( in_c2 )
self.ids.container.add_widget ( in_c3 )
self.ids.container.add_widget ( in_c4 )
self.ids.container.add_widget ( in_c5 )
class Page2Screen ( Screen ):
pass
class ManagerWidget ( ScreenManager ):
pass
class MainApp ( App ):
pass
if __name__ == '__main__':
MainApp( ).run( )
