I want to show "please wait gif" image from img() class before the ListApp() class process is complete and then as soon as the process of that class is completed the screeen of ListApp should be displayed.
I was trying the following code but it is not starting the process of ListApp() class
run1.py file
from kivy.lang import Builder
from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty
from Option import OptionApp
import sys, time, threading
from kivy.uix.screenmanager import ScreenManager, Screen
from datetime import datetime
import pandas_datareader.data as web
import pandas as pd
from kivymd.uix.screen import Screen
from kivymd.uix.list import MDList,ThreeLineListItem,ThreeLineAvatarIconListItem
from kivymd.uix.list import IconLeftWidget,ImageLeftWidget
from kivy.uix.scrollview import ScrollView
from kivy.uix.button import Button
from kivymd.app import MDApp
from kivy.app import App
from kivy.properties import ObjectProperty
import csv
from os import path
from kivy.uix.image import Image
from kivy.app import App
from kivy.uix.textinput import TextInput
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout
from kivy.uix.floatlayout import FloatLayout
from kivy.properties import NumericProperty, ListProperty, BooleanProperty, ObjectProperty, StringProperty
from kivy.uix.recycleview import RecycleView
from kivy.uix.recyclegridlayout import RecycleGridLayout
from kivy.uix.recycleview.views import RecycleDataViewBehavior
from kivy.uix.label import Label
from kivy.uix.recycleboxlayout import RecycleBoxLayout
from kivy.uix.behaviors import FocusBehavior
from kivy.uix.recycleview.layout import LayoutSelectionBehavior
import pandas as pdkv = Builder.load_file("run1.kv")class SelectableRecycleBoxLayout(FocusBehavior, LayoutSelectionBehavior,RecycleBoxLayout):''' Adds selection and focus behaviour to the view. '''class SelectableLabel(RecycleDataViewBehavior, Label):''' Add selection support to the Label '''index = Noneselected = BooleanProperty(False)selectable = BooleanProperty(True)txt_input1 = ObjectProperty(None)txt_input = ObjectProperty(None)def refresh_view_attrs(self, rv, index, data):''' Catch and handle the view changes '''self.index = indexreturn super(SelectableLabel, self).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 Trueif 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_selectedif is_selected:# self.root.ids.txt_input1.text = str(rv.data[index].get("text"))App.get_running_app().root.widget_1.ids.txt_input1.text = str(rv.data[index].get("text"))class RV(RecycleView):def __init__(self, **kwargs):super(RV, self).__init__(**kwargs)class DropDownWidget(BoxLayout):txt_input = ObjectProperty()rv = ObjectProperty()txt_input1 = ObjectProperty()class MyTextInput(TextInput):txt_input = ObjectProperty()txt_input1 = ObjectProperty(None)flt_list = ObjectProperty()word_list = ListProperty()# this is the variable storing the number to which the look-up will startstarting_no = NumericProperty(3)suggestion_text = ''def __init__(self, **kwargs):super(MyTextInput, self).__init__(**kwargs)def on_text(self, instance, value):# find all the occurrence of the wordself.parent.ids.rv.data = []matches = [self.word_list[i] for i in range(len(self.word_list)) ifself.word_list[i][:self.starting_no] == value[:self.starting_no]]# display the data in the recycleviewdisplay_data = []for i in matches:display_data.append({'text': i})self.parent.ids.rv.data = display_data# ensure the size is okayif len(matches) <= 10:self.parent.height = (50 + (len(matches) * 20))else:self.parent.height = 240def keyboard_on_key_down(self, window, keycode, text, modifiers):if self.suggestion_text and keycode[1] == 'tab':self.insert_text(self.suggestion_text + ' ')return Truereturn super(MyTextInput, self).keyboard_on_key_down(window, keycode, text, modifiers)class Body(Screen):def __init__(self, **kwargs):super(Body, self).__init__(**kwargs)f = pd.read_csv("stoploss.csv")fl = len(f.index)file = pd.DataFrame(f, columns=['Stock Symbol', 'Purchase Price', 'Stock Name', 'Stop Loss(%)'])j = 0wl = []for i in range(fl):for index in range(1):columnSeriesObj = file.iloc[:, 2]# pp = iter(columnSeriesObj.values)# pp1 = next(pp)# print(pp1)wl.append(columnSeriesObj.values[i])tp = tuple(wl)print(str(tp))self.widget_1 = DropDownWidget(pos_hint={'center_x': .5, 'center_y': .5},size_hint=(None, None), size=(600, 60))self.widget_1.ids.txt_input.word_list = wlself.widget_1.ids.txt_input.starting_no = 3self.add_widget(self.widget_1)class signin(Screen):user_name = ObjectProperty(None)def btn(self):username = self.user_name.textprint(username)sm.current = 'option_screen'class option(Screen):def btn_addstock(self):sm.current = 'body_screen'def btn_stoplosslist(self):sm.canvas.clear()sm.current = 'Stoploss_ip'class stockinput(Screen):stock_name = ObjectProperty(None)stock_symbol = ObjectProperty(None)purchase_price = ObjectProperty(None)stop_loss = ObjectProperty(None)def btn(self):end = datetime.today().date()start = end.year - 10start = datetime(start, datetime.today().month, datetime.today().day).date()uname = input("Enter user name: ")print("Stock Name:", self.stock_name.text, "Stock Symbol:", self.stock_symbol.text)print("Purchase Price:",self.purchase_price.text,"Stop Loss(%):",self.stop_loss.text)#write data to csv file# if path.exists("stoploss.csv"):# myFile = open('stoploss.csv', 'a')# else:# myFile = open('stoploss.csv', 'w')file_name = stockinput.uname + "_stoploss.csv"if path.exists(file_name):with open(file_name, "a+", newline='')as newFile :fieldnames = ["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"]newFileWriter = csv.DictWriter(newFile, fieldnames=fieldnames)newFileWriter.writerow({"Stock Name" : self.stock_name.text,"Stock Symbol" : self.stock_symbol.text,"Purchase Price" : self.purchase_price.text,"Stop Loss(%)" : self.stop_loss.text})else:myFile = open(file_name, 'w+')myData = [["Stock Name", "Stock Symbol", "Purchase Price", "Stop Loss(%)"],[self.stock_name.text, self.stock_symbol.text, self.purchase_price.text, self.stop_loss.text]]with myFile:writer = csv.writer(myFile)writer.writerows(myData)df = web.DataReader(self.stock_symbol.text, 'yahoo', start, end,)print(df.tail())self.stock_name.text = ""self.stock_symbol.text = ""self.purchase_price.text = ""self.stop_loss.text = ""f = pd.read_csv("stoploss.csv")
file = pd.DataFrame(f, columns=['Stock Symbol','Purchase Price','Stock Name','Stop Loss(%)'])class img(Screen):def build(self,**kwargs):super(img, self).__init__(**kwargs)screen = selfimage = Image(source='please_wait.gif')screen.add_widget(image)class ListApp(Screen):# def imgpr(self,**kwargs):# super(ListApp, self).__init__(**kwargs)## time.sleep(0.1)# t = threading.Thread(target=imgpr)# t.start()def build(self,**kwargs):super(ListApp, self).__init__(**kwargs)flag = Truescreen = self# if flag:### sm.add_widget(ListApp(name='Stoploss_ip'))end = datetime(2020, 12, 14)start = datetime(2020, 12, 14)btn = Button(text="Back",font_size="20sp",background_color=(255/255, 229/255, 204/255, 1),color=(1, 1, 1, 1),size=(12, 12),size_hint=(.1, .05),pos=(600, 500))btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))scroll = ScrollView()list_view = MDList()scroll.add_widget(list_view)i = 0fl = len(file.index)try:for index in range(fl):for index in range(1):columnSeriesObj2 = file.iloc[:, 0]df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)print(df.head())Objname = file.iloc[:, 2]columnSeriesObj = df.iloc[:, 3]columnSeriesObj1 = file.iloc[:, 1]ObjStoploss = file.iloc[:, 3]cp = iter(columnSeriesObj.values)pp = iter(columnSeriesObj1.values)pp1 = next(pp)cp1 = columnSeriesObj.values[0]sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))if cp1 <= sl:image = ImageLeftWidget(source='loss.png')items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),tertiary_text='Stoploss: ' + str(sl))items.add_widget(image)list_view.add_widget(items)i=i+1else:image = ImageLeftWidget(source='profit.jpg')items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],secondary_text='Close price: ' + str(cp1),tertiary_text='Stoploss: ' + str(sl))items.add_widget(image)list_view.add_widget(items)i=i+1except ConnectionAbortedError:print("Check your Internet connection")except ConnectionRefusedError:print("Check your Internet connection")except ConnectionError:print("Check your Internet connection")except ConnectionResetError:print("Check your Internet connection")except TimeoutError:print("Timeout!!!!...Check your Internet connection")except KeyError:passexcept:print("Something went wrong")print("Done")# flag = False# if flag ==False:screen.add_widget(scroll)screen.add_widget(btn)# return screenclass WindowsManager(ScreenManager):passsm = ScreenManager()
sm.add_widget(signin(name='signin_screen'))
sm.add_widget(option(name='option_screen'))
sm.add_widget(stockinput(name='stockinput_screen'))
sm.add_widget(img(name='image_screen'))
sm.add_widget(ListApp(name='Stoploss_ip'))
sm.add_widget(Body(name='body_screen'))class run1(MDApp):def build(self):return smif __name__ == "__main__":run1().run()
run1.kv file
<WindowsManager>:signin:option:stockinput:ListApp:Body:<Body>:name: 'body_screen'canvas.before:Color:rgba: 188/255, 143/255, 145/255, 1Rectangle:pos: self.possize: self.size<DropDownWidget>:id: DropDownWidgetcanvas:Color:rgba:(1, 1, 1, 1)Rectangle:# pos: self.possize: self.size# orientation: 'vertical'spacing: 20txt_input: txt_inputrv: rvtxt_input1: txt_input1MyTextInput:id: txt_input1pos: 400,300size_hint_y: Noneheight: 50MyTextInput:id: txt_inputhint_text:'Enter here'size_hint_y: Noneheight: 50RV:id: rv<MyTextInput>:id: MyTextInputreadonly: Falsemultiline: False<SelectableLabel>:id: SelectableLabel# Draw a background to indicate selectioncolor: 0,0,0,1canvas.before:Color:rgba: (0, 0, 1, .5) if self.selected else (1, 1, 1, 1)Rectangle:# pos: self.possize: self.size<RV>:canvas:Color:rgba: 0,0,0,.2Line:rectangle: self.x +1 , self.y, self.width - 2, self.height -2bar_width: 10scroll_type:['bars']viewclass: 'SelectableLabel'SelectableRecycleBoxLayout:default_size: None, dp(20)default_size_hint: 1, Nonesize_hint_y: Noneheight: self.minimum_heightorientation: 'vertical'multiselect: False
<signin>:canvas.before:Color:rgba: 164/255, 66/255, 220/255, 1Rectangle:pos: self.possize: self.sizename: 'signin_screen'user_name: user_nameGridLayout:pos_hint: {'center_x': .75, 'center_y': .15}row_force_default : Truerow_default_height : 50col_force_default : Truecol_default_width : 400spacing: '15dp'cols: 1TextInput:id: user_namemultiline:Falsesize_hint: 5.0 ,.1hint_text: "Email_ID"Button:text:"Submit"font_size: 20color:0,0,0,1size_hint: .5 ,.3background_normal: ''background_color: (255/255, 153/255, 71/255, 1)on_press : root.btn()Label:text:"Please Do not change the Email_ID. Data will be saved as per your Email_ID"pos: 180,80<option>:canvas.before:Color:rgba: 138/255, 104/255, 175/255, 1Rectangle:pos: self.possize: self.sizename: 'option_screen'GridLayout:pos_hint: {'center_x': .83, 'center_y': .18}row_force_default : Truerow_default_height : 100col_force_default : Truecol_default_width : 250spacing: '20dp'cols:1Button:text:"Add Stock"color:0,0,0,1font_size: 18size_hint: .1 ,.1pos: 150,150background_normal: ''background_color: (204/255, 0, 204/255, 1)on_press : root.manager.current = 'body_screen'Button:text:"Check Stoploss"color:0,0,0,1font_size: 18size_hint: .1 ,.1pos: 250,120background_normal: ''background_color:(127/255, 193/255, 184/255, 1)on_press : root.manager.current = 'Stoploss_ip'<stockinput>:canvas.before:Color:rgba: 188/255, 143/255, 145/255, 1Rectangle:pos: self.possize: self.sizename: 'stockinput_screen'stock_name: stock_namestock_symbol: stock_symbolpurchase_price: purchase_pricestop_loss: stop_lossGridLayout:pos_hint: {'center_x': .67, 'center_y': .2}row_force_default : Truerow_default_height : 40col_force_default : Truecol_default_width : 250spacing: '10dp'cols:2# pos_hint: {'center_x': .53, 'center_y': .12}
# row_force_default : True
# row_default_height : 30
# col_force_default : True
# col_default_width : 250
# spacing: '20dp'Label:text: "Stock Name: "TextInput:id: stock_namemultiline:FalseLabel:text: "Stock Symbol: "TextInput:id: stock_symbolmultiline:FalseLabel:text: "Purchase Price: "TextInput:id: purchase_pricemultiline:FalseLabel:text: "Stop Loss(%): "TextInput:id: stop_lossmultiline:FalseButton:text:"Submit"color:102/255, 204/255, 0, 1font_size:18background_color: (204/255, 0, 102/255, 1)on_press: root.btn()Button:text:"Back"color:0,0,0,1font_size:18background_normal: ''background_color: (204/255, 102/255, 0, 1)on_press: root.manager.current = 'option_screen'<img>:name: 'image_screen'on_enter:root.build()<ListApp>:name: 'Stoploss_ip'on_enter:root.build()
**update I tried adding 2 lines in build() method and its showing the images now.I think its preloading the images and saving them in cache.
class ListApp(Screen):def build(self):self.popup = Popup(title='Calculating Stoploss', content=Image(source='please_wait.gif'))self.profit = ImageLeftWidget(source='profit.jpg')self.loss = ImageLeftWidget(source='loss.png')self.popup.open()# Clock.schedule_once(partial(self.actual_build))threading.Thread(target=self.actual_build).start()def actual_build(self):screen = selfend = datetime.today().date()start = endbtn = Button(text="Back",font_size="20sp",background_color=(255/255, 229/255, 204/255, 1),color=(1, 1, 1, 1),size=(12, 12),size_hint=(.1, .05),pos=(600, 500))btn.bind(on_press=lambda *args: setattr(sm, 'current', "option_screen"))scroll = ScrollView()list_view = MDList()scroll.add_widget(list_view)i = 0fl = len(file.index)try:for index in range(fl):for index in range(1):columnSeriesObj2 = file.iloc[:, 0]df = web.DataReader(columnSeriesObj2.values[i],'yahoo', start, end,retry_count=3)print(df.head())Objname = file.iloc[:, 2]columnSeriesObj = df.iloc[:, 3]columnSeriesObj1 = file.iloc[:, 1]ObjStoploss = file.iloc[:, 3]cp = iter(columnSeriesObj.values)pp = iter(columnSeriesObj1.values)pp1 = next(pp)cp1 = columnSeriesObj.values[0]sl = columnSeriesObj1.values[i] - (columnSeriesObj1.values[i] * (ObjStoploss.values[i]/100))if cp1 <= sl:image = ImageLeftWidget(source='loss.png')items = ThreeLineAvatarIconListItem(text="Alert sale " + Objname.values[i], secondary_text='Close price: '+str(cp1),tertiary_text='Stoploss: ' + str(sl))items.add_widget(image)list_view.add_widget(items)i=i+1else:image = ImageLeftWidget(source='profit.jpg')items = ThreeLineAvatarIconListItem(text="Chill " + Objname.values[i],secondary_text='Close price: ' + str(cp1),tertiary_text='Stoploss: ' + str(sl))items.add_widget(image)list_view.add_widget(items)i=i+1except ConnectionAbortedError:print("Check your Internet connection")except ConnectionRefusedError:print("Check your Internet connection")except ConnectionError:print("Check your Internet connection")except ConnectionResetError:print("Check your Internet connection")except TimeoutError:print("Timeout!!!!...Check your Internet connection")except KeyError:passexcept:pass# print("Something went wrong")print("Done")# screen.add_widget(screen.scroll)# screen.add_widget(btn)Clock.schedule_once(partial(screen.finish_build, scroll, btn))screen.popup.dismiss()def finish_build(self, scroll, btn, dt):screen = selfscreen.add_widget(scroll)screen.add_widget(btn)