bugfix

kivyblocks/baseWidget.py

@@ -89,16 +89,6 @@ font_names = {
 	'title1':resource_find('Alimama_ShuHeiTi_Bold.ttf')
 }
 
-font_sizes = {
-	'text':CSize(1),
-	'title6':CSize(1.1),
-	'title5':CSize(1.3),
-	'title4':CSize(1.5),
-	'title3':CSize(1.7),
-	'title2':CSize(1.9),
-	'title1':CSize(2.1)
-}
-
 if platform == 'android':
 	from .widgetExt.phonebutton import PhoneButton
 	from .widgetExt.androidwebview import AWebView
@@ -162,10 +152,12 @@ class SwipeBox(SwipeBehavior, Box):
 class Text(Label):
 	lang=StringProperty('')
 	otext = StringProperty('')
-	def __init__(self,i18n=False, texttype='text', wrap=False,
+	def __init__(self,i18n=False, texttype='text', wrap=False, rate=1,
 					fgcolor=None, **kw):
 		
-		fontsize = font_sizes.get(texttype)
+		app = App.get_running_app()
+		self.rate = 1
+		fontsize = app.get_font_size(texttype) * self.rate
 		fontname = font_names.get(texttype)
 		self._i18n = i18n
 		self.i18n = I18n()
@@ -181,6 +173,8 @@ class Text(Label):
 			kwargs['text'] = kwargs.get('otext','')
 		
 		super(Text, self).__init__(**kwargs)
+		app.bind(font_size=self.reset_font_size)
+		# self.bind(texture_size=self.setter('size'))
 		if self._i18n:
 			self.i18n.addI18nWidget(self)
 		if self.wrap:
@@ -190,6 +184,9 @@ class Text(Label):
 		if self.bgcolor:
 			self.color = self.bgcolor
 
+	def reset_font_size(self, app, fsize):
+		self.font_size = fsize * self.rate
+
 	def resize(self, *args):
 		if not self.size_hint_y:
 			ps = [0,0,0,0]

kivyblocks/blocks.py

@@ -214,7 +214,14 @@ x = ClassX{klass_cnt}()
 				print_exc()
 				if errback:
 					return errback(None,e)
-				return None
+				return {
+					"widgettype":"Text",
+					"options":{
+						"text":f"{url=} error",
+						"wrap":True,
+						"halign":"left"
+					}
+				}
 		else:
 			config = getConfig()
 			url = config.uihome + url
@@ -727,7 +734,7 @@ x = ClassX{klass_cnt}()
 			print('Block3: desc must be a dict object not None')
 			return None
 		w =  doit(desc)
-		print('widgetBuild():w=', w)
+		# print('widgetBuild():w=', w)
 		return w
 	
 	@classmethod
@@ -769,7 +776,7 @@ x = ClassX{klass_cnt}()
 				children = [i for i in from_widget.children]
 				if hasattr(from_widget, 'get_subwidgets'):
 					children = from_widget.get_subwidgets()
-				Logger.info('children=%s', str(children))
+				# Logger.info('children=%s', str(children))
 				for c in children:
 					ret = _find_widget(name, from_widget=c, dir=dir)
 					if ret:

kivyblocks/blocksapp.py

@@ -12,6 +12,7 @@ from appPublic.folderUtils import ProgramPath
 from appPublic.uniqueID import getID
 from appPublic.rsawrap import RSA
 
+from kivy.properties import NumericProperty
 from kivy.factory import Factory
 from kivy.metrics import sp,dp,mm
 from kivy.core.window import WindowBase, Window
@@ -48,6 +49,7 @@ signal.signal(signal.SIGINT, signal_handler)
 
 
 class BlocksApp(App):
+	font_size = NumericProperty(24)
 	def get_rotation(self):
 		return get_rotation()
 
@@ -78,7 +80,26 @@ class BlocksApp(App):
 			if isinstance(v,dict):
 				register_css(k,v)
 
+	def set_fontsize(self, x):
+		self.font_size = x
+
+	def get_font_size(self, ttype='text'):
+		text_fontrates = {
+			'text':1,
+			'title6':1.1,
+			'title5':1.3,
+			'title4':1.5,
+			'title3':1.7,
+			'title2':1.9,
+			'title1':2.1
+		}
+		v = text_fontrates.get(ttype, 'text')
+		return v * self.font_size
+		
 	def build(self):
+		tl = Label(text='test')
+		self.font_size = tl.font_size
+		print('##################app_font_size=', self.font_size) 
 		config = getConfig()
 		self.workers = Workers(maxworkers=config.maxworkers or 80)
 		self.workers.start()
@@ -93,10 +114,10 @@ class BlocksApp(App):
 			self.default_params.update(config.default_params)
 
 		self.public_headers = {
+			"client_uuid":getID(),
 			"platform":self.platform
 		}
 		# Window.borderless = True
-		print('Window.dpi=', Window.dpi, 'Metrics.dpi=', Metrics.dpi)
 		Window.bind(on_request_close=self.on_close)
 		Window.bind(on_rotate=self.on_rotate)
 		Window.bind(size=self.device_info)

kivyblocks/boxViewer.py

@@ -29,7 +29,7 @@ from kivy.graphics import Fbo, Color, Rectangle
 from kivy.properties import NumericProperty, StringProperty, DictProperty
 from .responsivelayout import VResponsiveLayout
 from .toolbar import Toolbar
-from .paging import Paging, RelatedLoader
+from .paging import RelatedLoader
 from .utils import CSize, SUPER
 from .ready import WidgetReady
 from .baseWidget import VBox

kivyblocks/clickable.py

@@ -3,6 +3,12 @@ from kivy.logger import Logger
 from kivy.uix.behaviors import TouchRippleButtonBehavior
 from kivy.graphics import Color, Rectangle
 from kivy.uix.boxlayout import BoxLayout
+from kivy.uix.anchorlayout import AnchorLayout
+from kivy.uix.floatlayout import FloatLayout
+from kivy.uix.relativelayout import RelativeLayout
+from kivy.uix.gridlayout import GridLayout
+from kivy.uix.scatterlayout import ScatterLayout
+from kivy.uix.stacklayout import StackLayout
 from kivy.factory import Factory
 from kivy.uix.image import AsyncImage
 from kivy.properties import NumericProperty, DictProperty, \
@@ -395,6 +401,34 @@ def build_cmdbox_view(desc, rec=None):
 	x.setValue(vd)
 	return x
 
+class PressableAnchorLayout(TouchRippleButtonBehavior, AnchorLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
+class PressableBoxLayout(TouchRippleButtonBehavior, BoxLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
+class PressableFloatLayout(TouchRippleButtonBehavior, FloatLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
+class PressableRelativeLayout(TouchRippleButtonBehavior, RelativeLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
+class PressableGridLayout(TouchRippleButtonBehavior, GridLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
+class PressableScatterLayout(TouchRippleButtonBehavior, ScatterLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
+class PressableStackLayout(TouchRippleButtonBehavior, StackLayout):
+	def on_press(self, o=None, d=None):
+		pass
+
 UiFactory.register('checkbox', build_checkbox, build_checkbox)
 UiFactory.register('cmdbox', build_cmdbox_view, build_cmdbox_view)
 
@@ -409,3 +443,10 @@ r('ToggleText',ToggleText)
 r('ToggleIconText',ToggleIconText)
 r('ClickableImage',ClickableImage)
 r('ToggleImage',ToggleImage)
+r('PressableAnchorLayout',PressableAnchorLayout)
+r('PressableBoxLayout',PressableBoxLayout)
+r('PressableFloatLayout',PressableFloatLayout)
+r('PressableRelativeLayout',PressableRelativeLayout)
+r('PressableGridLayout',PressableGridLayout)
+r('PressableScatterLayout',PressableScatterLayout)
+r('PressableStackLayout',PressableStackLayout)

kivyblocks/container.py

@@ -1,7 +1,12 @@
 # container is ScrollView with a dataloader
-from kivy.uix.scrollview import ScroppView
-from kivy.properties import DictProperty, ListProperty, BooleanProperty
-from .paging import Paging, RelatedLoader
+import json
+from appPublic.myTE import MyTemplateEngine
+from kivy.uix.scrollview import ScrollView
+from kivy.properties import DictProperty, ListProperty, BooleanProperty, StringProperty, NumericProperty
+from kivy.clock import Clock
+from kivyblocks.blocks import Blocks
+from kivyblocks.paging import RelatedLoader
+from kivyblocks.widget_css import WidgetCSS
 
 class LayoutBuildFailed(Exception):
 	def __init__(self, desc):
@@ -13,7 +18,7 @@ class LayoutBuildFailed(Exception):
 	def __expr__(self):
 		return str(self)
 
-class Container(ScrollView):
+class Container(WidgetCSS, ScrollView):
 	"""
 		"loader":{
 			"page":1,
@@ -24,43 +29,118 @@ class Container(ScrollView):
 			}
 		},
 	"""
+	idField = StringProperty('id')
 	loader = DictProperty({})
 	data = ListProperty(None)
 	layout = DictProperty({})
 	viewer = DictProperty({})
+	min_threhold = NumericProperty(0.01)
+	max_htrehold = NumericProperty(0.99)
 	extend_x = BooleanProperty(False)
 	content = None
 	def __init__(self, **kw):
+		self.dataloader = None
+		self.engine = MyTemplateEngine('.')
+		self.id_widget = {}
 		super(Container, self).__init__(**kw)
-		self.content = Blocks.widgetBuild(self.layout, self)
+		self.content = Blocks().widgetBuild(self.layout)
 		if not self.content:
 			raise LayoutBuildFailed
 		if self.do_scroll_x:
-			self.content.bind(minimum_height=layout.setter('width'))
+			self.content.bind(minimum_width=self.content.setter('width'))
 		if self.do_scroll_y:
-			self.content.bind(minimum_height=layout.setter('height'))
-		super().add_widget(self.content)
+			self.content.bind(minimum_height=self.content.setter('height'))
+		self.add_widget(self.content)
+		self.viewer_tmpl = json.dumps(self.viewer)
+		self.bind(on_scroll_stop = self.on_scrollstop)
+		if self.data:
+			d = {
+				"dir":"down",
+				"rows":self.data,
+				"total":len(self.data)
+			}
+			self.add_page(d)
+		
+		if self.loader:
 			self.dataloader = RelatedLoader(target=self, **self.loader)
 			self.dataloader.bind(on_deletepage=self.delete_page)
 			self.dataloader.bind(on_pageloaded=self.add_page)
-		self.dataloader.bind(on_pageloaded=self.update_tailer_info)
-		self.dataloader.bind(on_newbegin=self.clearRows)
+			self.dataloader.bind(on_newbegin=self.clear_records)
+			Clock.schedule_once(self.loadData, 0.5)
 
-	def delete_page(self, ):
-	def add_page(self, ):
-	def clear_records(self, ):
+	def print_info(self, *args):
+		print(f"{self.scroll_distance=}, {self.scroll_timeout=}, {self.do_scroll_x=} {self.do_scroll_y=}, {self.scroll_x=}, {self.scroll_y=}, {self.content.size=}")
 
-	def add_widget(self, w, index=0):
-		return self.content.add_widget(w,index=index)
+	def parse_viewer(self, rec):
+		return json.loads(self.engine.renders(self.viewer_tmpl, rec))
 
-	def remove_widget(self, w):
-		return self.content.remove_widget(w)
+	def loadData(self, *args, **kw):
+		kw['page'] = 1
+		self.dataloader.do_search(None,kw)
 
-	def clear_widgets(self):
-		return self.content.clear_widgets()
-	
-	def add_data(self, row_data):
-		desc = self.transfer(row_data)
-		w = Blocks.widgetBuild(desc)
+	def add_record(self, rec, tail=True):
+		desc = self.parse_viewer(rec)
+		w = Blocks().widgetBuild(desc)
 		if w:
-			self.add_widget(w)
+			idx = 0
+			if not tail:
+				idx = -1
+			id = rec.get(self.idField)
+			self.id_widget[id] = w
+			self.content.add_widget(w, index=idx)
+		else:
+			print(f'create widget error {self.viewer_tmpl=}, {rec=}')
+
+	def delete_record(self, rec):
+		id = rec.get(self.idField)
+		w = self.id_widget.get(id)
+		if w:
+			self.content.remove_widget(w)
+		del self.id_widget[id]
+
+	def delete_page(self, o, d):
+		# print(f'delete_page():{o=}, {d=}')
+		for r in d:
+			self.delete_record(r)
+
+	def add_page(self, o, d):
+		# print(f'add_page():{o=},{d=}')
+		dir = d.get('dir', 'down')
+		recs = d.get('data', [])
+		tail = True
+		if dir != 'down':
+			tail = False
+			recs.reverse()
+
+		for r in recs:
+			self.add_record(r, tail=tail)
+		if self.extend_x:
+			self.scroll_x = d['locator']
+		else:
+			self.scroll_y = d['locator']
+
+	def clear_records(self, o):
+		# print(f'clear_records():{o=}')
+		self.content.clear_widgets()
+		self.id_Widget = {}
+
+	def on_scrollstop(self, o, d=None):
+		if self.dataloader is None:
+			return
+		if self.extend_x:
+			if self.scroll_x < self.min_threhold:
+				self.dataloader.loadNextPage()
+			if self.scroll_x > self.max_htrehold:
+				self.dataloader.loadPreviousPage()
+			print('return here ...')
+			return
+		if self.dataloader.loading:
+			print('loading is True')
+			return
+		if self.scroll_y < self.min_threhold:
+			print('load next page ...')
+			self.dataloader.loadNextPage()
+		if self.scroll_y > self.max_htrehold:
+			print('load previous page ...')
+			self.dataloader.loadPreviousPage()
+

kivyblocks/defaultimage.py

@@ -1,3 +1,4 @@
+import os
 from kivy.uix.image import AsyncImage
 from kivy.factory import Factory
 from kivy.properties import StringProperty

kivyblocks/eventhandler.py

@@ -1,11 +1,11 @@
 import inspect
 import asyncio
-from functools improt wraps
+from functools import wraps
 
 def eventhandler(func):
 	@wraps(func)
 	def wrapper_func(*args, **kw):
-		if inspect.inspect.iscoroutinefunction(func):
+		if inspect.iscoroutinefunction(func):
 			return asyncio.gather(func(*args, **kw))
 		return func(*args, **kw)
 	return wrapper_func

kivyblocks/i18n.py

@@ -58,9 +58,12 @@ class I18n:
 		if config.i18n_url:
 			url = '%s%s' % (config.uihome, config.i18n_url)
 			hc = HttpClient()
+			try:
 				d = hc.get(url)
 				if isinstance(d, list):
 					return d
+			except:
+				pass
 		return []
 			
 	def loadI18n(self,lang):
@@ -74,9 +77,12 @@ class I18n:
 		if config.i18n_url:
 			url = '%s%s/%s' % (config.uihome, config.i18n_url, lang)
 			hc = HttpClient()
+			try:
 				d = hc.get(url)
 				print('i18n() %s get data=' % url, d, type(d))
 				self.kvlang[lang] = d
+			except:
+				pass
 		
 	def __call__(self,msg,lang=None):
 		if lang is None:

kivyblocks/pagepanel.py

@@ -177,6 +177,8 @@ sub-widget's description file format
 			self.left_menu = Factory.Blocks().widgetBuild(left_menu)
 		self.sub_widgets = []
 		VBox.__init__(self, **kw)
+		app = App.get_running_app()
+		print('========================barsize=', CSize(bar_size), bar_size, app.font_size)
 		self.bar = HBox(size_hint_y=None,
 						csscls=bar_css,
 						spacing=CSize(bar_size/6),

kivyblocks/paging.py

@@ -17,28 +17,6 @@ from .dataloader import UrlDataLoader
 from .dataloader import ListDataLoader
 from .dataloader import RegisterFunctionDataLoader
 
-class PagingButton(Button):
-	def __init__(self, **kw):
-		super().__init__(**kw)
-		self.size_hint = (None,None)
-		self.size = CSize(2,1.8)
-		self.font_size = CSize(1)
-
-"""
-{
-	dataurl
-	params
-	method
-	locater
-	filter
-}
-
-PageLoader load data in a page size once.
-it fires two type of event
-'on_newbegin':fire when start a new parameters loading series
-'on_pageloaded':fire when a page data loads success
-"""
-
 class PageLoader(EventDispatcher):
 	def __init__(self,target=None, **options):
 		self.loading = False
@@ -113,11 +91,11 @@ class PageLoader(EventDispatcher):
 			p += 1
 		self.total_cnt = d['total']
 		self.calculateTotalPage()
-		d = {
+		d.update( {
 			"page":self.curpage,
+			"data":d['rows'],
 			"dir":self.dir,
-			"data":d['rows']
-		}
+		})
 		self.dispatch('on_pageloaded',d)
 		self.loading = False
 		
@@ -129,10 +107,10 @@ class PageLoader(EventDispatcher):
 	def loadNextPage(self):
 		if self.loading:
 			print('is loading, return')
-			return
+			return -1
 
 		if self.total_page > 0 and self.curpage >=self.total_page:
-			return
+			return -1
 		p = self.curpage + 1
 		self.loadPage(p)
 
@@ -163,39 +141,18 @@ class PageLoader(EventDispatcher):
 		self.curpage = p
 		self.loader.load()
 	
-"""
-{
-	adder,
-	remover
-	target,
-	locater,
-	dataurl,
-	params,
-	method,
-	filter
-}
-events:
-'on_deletepage': erase
-
-"""
 class RelatedLoader(PageLoader):
 	def __init__(self, **options):
 		super().__init__(**options)
 		self.objectPages = {}
 		self.totalObj = 0
 		self.MaxbufferPage = 3
-		self.locater = 1/self.MaxbufferPage
-		if self.filter:
-			self.widget = self.filter
-		else:
-			self.widget = None
+		self.buffered_pages = 0
 		self.register_event_type('on_deletepage')
 
 	def do_search(self,o,params):
 		self.objectPages = {}
 		self.totalObj = 0
-		self.MaxbufferPage = 3
-		self.locater = 1/self.MaxbufferPage
 		super().do_search(o, params)
 		
 	def getLocater(self):
@@ -216,13 +173,15 @@ class RelatedLoader(PageLoader):
 			self.calculateTotalPage()
 	
 	def doBufferMaintain(self):
-		siz = len(self.objectPages.keys())
-		if siz >= self.MaxbufferPage:
+		siz = len([k for k in self.objectPages.keys()])
+		self.buffered_pages = siz
+		if siz > self.MaxbufferPage:
 			if self.dir == 'up':
 				p = max(self.objectPages.keys())
 			else:
 				p = min(self.objectPages.keys())
 			self.deleteBuffer(p)
+			self.buffered_pages = self.MaxbufferPage
 
 	def deleteBuffer(self,page):
 		d = self.objectPages[page]
@@ -237,18 +196,25 @@ class RelatedLoader(PageLoader):
 	def show_page(self,o,data):
 		if self.objectPages.get(self.curpage):
 			self.deleteBuffer(self.curpage)
-		else:
+		self.bufferObjects(self.curpage, data['rows'])
 		self.doBufferMaintain()
 		self.totalObj += len(data['rows'])
+		if self.dir == 'down':
+			data['locator'] = 1/self.buffered_pages
+		else:
+			data['locator'] = 1 - 1/self.buffered_pages
+
 		super().show_page(o,data)
 	
 	def loadPreviousPage(self):
 		pages = self.objectPages.keys()
 		if len(pages) < 1:
+			print('self.objectPages is null')
 			return
 
 		page = min(pages)
 		if page <= 1:
+			print('page < 1')
 			return
 
 		page -= 1
@@ -257,68 +223,12 @@ class RelatedLoader(PageLoader):
 	def loadNextPage(self):
 		pages = self.objectPages.keys()
 		if len(pages) == 0:
+			print('self.objectPages is null')
 			return
 		page = max(pages)
 		if page>=self.total_page:
+			print('page > total page')
 			return
 		page += 1
 		self.loadPage(page)
 
-"""
-{
-	adder,
-	clearer
-	target,
-	dataurl
-	params,
-	method
-}
-"""
-class Paging(PageLoader):
-	def __init__(self,**options):
-		PageLoader.__init__(self,**options)
-		self.target = options.get('target')
-		self.init()
-
-	def init(self):
-		kwargs = {}
-		kwargs['size_hint_y'] = None
-		kwargs['height'] = CSize(2)
-		kwargs['orientation'] = 'horizontal'
-		kwargs['spacing'] = CSize(1)
-		self.widget = BoxLayout(**kwargs)
-		self.b_f = PagingButton(text="|<")
-		self.b_p = PagingButton(text="<")
-		self.b_n = PagingButton(text=">")
-		self.b_l = PagingButton(text=">|")
-		self.b_f.bind(on_press=self.loadFirstPage)
-		self.b_p.bind(on_press=self.loadPreviousPage)
-		self.b_n.bind(on_press=self.loadNextPage)
-		self.b_l.bind(on_press=self.loadLastPage)
-		self.widget.add_widget(self.b_f)
-		self.widget.add_widget(self.b_p)
-		self.widget.add_widget(self.b_n)
-		self.widget.add_widget(self.b_l)
-		if self.filter:
-			self.widget.add_widget(self.filter)
-
-	def loadFirstPage(self,o=None):
-		if self.curpage == 1:
-			return
-		self.loadPage(1)
-	
-	def loadPreviousPage(self,o=None):
-		if self.curpage < 2:
-			return
-		self.loadPage(self.curpage-1)
-	
-	def loadNextPage(self,o=None):
-		if self.curpage >= self.total_page:
-			return
-		self.loadPage(self.curpage+1)
-	
-	def loadLastPage(self,o=None):
-		if self.curpage >= self.total_page:
-			return
-		self.loadPage(self.total_page)
-

kivyblocks/register.py

@@ -8,6 +8,7 @@ import kivyblocks.clickable
 import kivyblocks.multi_select
 
 from .baseWidget import *
+from .container import Container
 from .tree import Tree, TextTree, MenuTree, PopupMenu
 from .toolbar import ToolPage, Toolbar
 from .dg import DataGrid
@@ -53,6 +54,7 @@ from .landscopehide import LandscopeHide
 r = Factory.register
 # if kivy.platform in ['win','linux', 'macosx']:
 #	r('ScreenWithMic', ScreenWithMic)
+r('Container', Container)
 r('LandscopeHide', LandscopeHide)
 r('VideoBehavior', VideoBehavior)
 r('ModalBehavior', ModalBehavior)

kivyblocks/scrollpanel.py

@@ -6,8 +6,8 @@ from kivy.uix.widget import Widget
 from kivy.uix.boxlayout import BoxLayout
 from kivy.factory import Factory
 
-from .utils import *
-from .widget_css import WidgetCSS
+from kivyblocks.utils import *
+from kivyblocks.widget_css import WidgetCSS
 
 class ScrollPanel(WidgetCSS, ScrollView):
 	orientation = OptionProperty('vertical', \

kivyblocks/tab.py

@@ -24,8 +24,8 @@ from appPublic.uniqueID import getID
 from kivy.uix.tabbedpanel import TabbedPanel, TabbedPanelItem
 from kivy.clock import Clock
 from kivy.factory import Factory
-from .utils import SUPER
-from .widget_css import WidgetCSS
+from kivyblocks.utils import SUPER
+from kivyblocks.widget_css import WidgetCSS
 
 class TabsPanel(WidgetCSS, TabbedPanel):
 	def __init__(self, tabs=[], **options):
@@ -33,26 +33,44 @@ class TabsPanel(WidgetCSS, TabbedPanel):
 		SUPER(TabsPanel, self, options)
 		# TabbedPanel.__init__(self,**options)
 		# BGColorBehavior.__init__(self)
+		self.old_content = None
+		self.def_tab = None
+		self.register_event_type('on_content_show')
+		self.register_event_type('on_content_hide')
 		Clock.schedule_once(self.add_tabs,0)
 
-	def newname(self):
-		return getID()
-
-	def add_tab(self,name,text,desc):
-		def add(o,w):
-			if not hasattr(w,'widget_id'):
-				w.widget_id = name
-			self.add_widget(TabbedPanelItem(text=text,content=w))
+	def add_tab(self,desc):
+		if not desc.get('name'):
+			desc['name'] = getID()
 		blocks = Factory.Blocks()
-		blocks.bind(on_built=add)
-		blocks.widgetBuild(desc)
+		w = blocks.widgetBuild(desc['content'])
+		if w is None:
+			return
+		if not hasattr(w,'widget_id'):
+			w.widget_id = desc['name']
+		item = TabbedPanelItem(text=desc['text'],content=w)
+		if desc.get('isdefault', False):
+			self.def_tab = item
+		self.add_widget(item)
 
 	def add_tabs(self,*args):
 		for d in self.tabs_list:
-			name = d.get('name',self.newname())
-			text = d['text']
-			desc = d['content']
-			self.add_tab(name,text,desc)
+			self.add_tab(d)
+		if self.def_tab:
+			self.switch_to(self.def_tab)
+		self.bind(current_tab = self.content_changed)
+	
+	def content_changed(self, o, v=None):
+		if self.old_content:
+			self.dispatch('on_content_hide', self.old_content)
+		self.old_content = self.current_tab.content
+		self.dispatch('on_content_show', self.old_content)
+
+	def on_content_show(self, *args):
+		print('content show', args)
+	
+	def on_content_hide(self, *args):
+		print('content hide', args)
 
 if __name__ == '__main__':
 	from kivy.app import App

kivyblocks/toolbar.py

@@ -221,6 +221,9 @@ class ToolPage(Box):
 			self.orientation = 'vertical'
 		else:
 			self.orientation = 'horizontal'
+		self.current_sub_content = None
+		self.register_event_type('on_content_show')
+		self.register_event_type('on_content_hide')
 		if not self.toolbar_size:
 			self.toolbar_size = self.img_size + self.text_size + 0.3
 		self.content_widgets = {}
@@ -259,6 +262,7 @@ class ToolPage(Box):
 
 	def init(self):
 		self.content_w = BoxLayout()
+		self.curr_sub_content = None
 		self.content_w.widget_id = 'content'
 		self.toolbar_w = Toolbar(**self.toolbar)
 		if self.tool_at in ['top','left']:
@@ -300,24 +304,37 @@ class ToolPage(Box):
 		refresh = v.get('refresh', False)
 		# self.print_all()
 
+		if self.current_sub_content:
+			self.dispatch('on_content_hide', self.current_sub_content)
+
 		w = self.content_widgets.get(name)
 		self.content_w.clear_widgets()
 		if w and not refresh:
 			self.content_w.add_widget(w)
-			return
+		else:
+			w = None
 			url = v.get('url')
 			if url:
 				w = self.build_widget(url)
 				if w:
 					self.content_widgets[name] = w
 					self.content_w.add_widget(w)
-			return
+			else:
 				rfname = v.get('rfname')
 				if rfname:
 					rf = RegisterFunction()
 					f = rf.get(rfname)
 					if f:
-				r = f()
-				if isinstance(r,Widget):
-						self.content_w.add_widget(r)
+						w = f()
+						if isinstance(w,Widget):
+							self.content_widgets[name] = w
+							self.content_w.add_widget(w)
+		if w:
+			self.current_sub_content = w
+			self.dispatch('on_content_show', w)
 
+	def on_content_show(self, content):
+		pass
+	
+	def on_content_hide(self, content):
+		pass

kivyblocks/tree.py

@@ -158,12 +158,28 @@ class TreeNode(BoxLayout):
 			self.node_box1.width = width
 		for n in self.nodes:
 			n.setMinWidth(width)
+	def build_content(self):
+		self.buildContent()
+		x = self.content
+		cf = self.treeObj.checkField
+		if cf:
+			self.content = HBox(size_hint_y=None, 
+									height=self.treeObj.rowHeight)
+			self.checkbox_w = CheckBox(active=self.data.get(cf, False)
+			self.content.add_widget(self.checkbox_w)
+			self.content.add_widget(x)
+			self.checkbox_w.bind(active=self.on_checkbox_active)
+
+	def on_checkbox_active(self, o, v):
+		cf = self.treeObj.checkField
+		self.data[cf] = v
+		self.treeObj.node_checkbox_changed(self)
 		
 	def buildContent(self):
 		pass
 
 	def addContent(self):
-		self.buildContent()
+		self.build_content()
 		self.node_box.add_widget(self.content)
 		self.node_box.height = self.treeObj.rowheight
 		self.node_box.width = self.trigger.width + \
@@ -304,8 +320,7 @@ tree options
 	"single_expand",
 	"select_leaf_only",
 	"bgcolor",
-	"checkbox",
-	"multplecheck",
+	"checkField",
 	"idField",
 	"textFiled",
 	"data" # array of {children:{},...}
@@ -313,7 +328,7 @@ tree options
 """
 class Tree(WidgetCSS, ScrollWidget):
 	data = ListProperty([])
-	def __init__(self,
+	def __init__(self,nodeKlass=TreeNode,
 			url=None,
 			params={},
 			single_expand=False,
@@ -322,13 +337,13 @@ class Tree(WidgetCSS, ScrollWidget):
 			normal_css="default",
 			row_height=2,
 			selected_css="selected",
-			checkbox=False,
-			multiplecheck=False,
+			checkField=None,
 			idField='id',
 			textField='text',
 			data=None,
 			**options):
 		self.url = url
+		self.nodeKlass = nodeKlass
 		self.params = params
 		self.data = data
 		self.single_expand=single_expand
@@ -338,8 +353,7 @@ class Tree(WidgetCSS, ScrollWidget):
 		self.bgcolor = bgcolor
 		self.normal_css = normal_css
 		self.selected_css = selected_css
-		self.checkbox = checkbox
-		self.multiplecheck = multiplecheck
+		self.checkFiled = checkField
 		self.idField = idField
 		self.textField = textField
 		print('options=',options)
@@ -351,6 +365,10 @@ class Tree(WidgetCSS, ScrollWidget):
 		self.buildTree()
 		self.bind(size=self.onSize,pos=self.onSize)
 		self.register_event_type('on_press')
+		self.register_event_type('on_checked')
+
+	def node_checkbox_changed(self, node):
+		self.dispatch('on_checked', node.data)
 
 	def on_press(self,*larg):
 		pass

kivyblocks/utils.py

@@ -194,8 +194,11 @@ def getWidgetById(w,id):
 	return w.ids.get(id)
 		
 def CSize(x,y=None,name=None):
-	ks = KivySizes()
-	return ks.CSize(x,y=y,name=name)
+	app = App.get_running_app()
+	r = app.font_size
+	if not y:
+		return r * x
+	return r * x, r * y
 
 def screenSize():
 	ks = KivySizes()

kivyblocks/widgetExt/tree.py

@@ -1,24 +0,0 @@
-"""
-tree description json format:
-{
-	"url":a http(s) url for get data,
-	"checkbox":boolean, show a checkbox before text
-	"data":if undefined url,use data to construct the tree
-	"params":parameters attached to the http(s) request  via url
-	"headers":headers need to set for the http request via url
-	"height":widget 's height
-	"width":widget's width
-}
-
-data structure :
-{
-	"id":identified field,
-	"widgettype":widget type,
-	...other data...
-	"__children__":[
-	]
-}
-"""
-from .scrollwidget import ScrollWidget
-from kivy.uix.treeview import TreeView
-