python 3.x - Kivy Scrollable Label and text file, label wont update -

-

hy, problem current code, @ point preety nothing text editor, when ever try make scrollable label in kv language , call on main screen @ push of button, no error, theres nothing there. should mention text taken stored file, , version works regular label. code, know bit long preety easy understand stay me. sort of input apreciated , thank taking time.

#kivy.require("1.8.0") kivy.app import app kivy.lang import builder kivy.uix.screenmanager import screenmanager, screen, fadetransition kivy.uix.widget import widget kivy.uix.scatter import scatter kivy.uix.label import label kivy.uix.scrollview import scrollview kivy.uix.floatlayout import floatlayout kivy.uix.textinput import textinput kivy.properties import stringproperty kivy.uix.boxlayout import boxlayout kivy.graphics import line kivy.uix.gridlayout import gridlayout   kv = ''' #: import fadetransition kivy.uix.screenmanager.fadetransition  screenmanager:     transition: fadetransition()     mainscreen:     addscreen:     appendscreen:   <scattertextwidget>:     orientation: 'vertical'      textinput:         id: main_input         font_size: 14         size_hint_y: none         height: root.height - botones_layout.height         font_color: [0.1,0.3,0.9,1]         focus: true         foreground_color: [0.2,0.5,0.9,1]         cursor_color: [0,0,1,1]      boxlayout:         id: botones_layout         orientation: 'horizontal'         height: 30         button:             id: home_button             text: "back home"                     button:             id: save_button             text: "save file"             on_press: root.savetofile("archive.txt", main_input.text)   <appendtextwidget>:     orientation: 'vertical'      textinput:         text: root.text         id: main_input         font_size: 14         size_hint_y: none         height: root.height - botones_layout.height         font_color: [0.1,0.3,0.9,1]         focus: true         foreground_color: [0.2,0.5,0.9,1]         cursor_color: [0,0,1,1]      boxlayout:         id: botones_layout         orientation: 'horizontal'         height: 30         button:             id: home_button             text: "back home"             on_release: app.root.current = "main"         button:             id: save_button             text: "save"             on_press: root.append(main_input.text)  #this not work <--- <--- <---  <scrollablelabel>:     label:         text: root.text         font_size: 15         text_size: self.width, none         color: [0,255,0,1]         padding_x: 20         size_hint_y: none         pos_hint: {"left":1, "top":1}         height: self.texture_size[1]   <mainscreen>:     name: "main"     floatlayout:          # work           label:             text: root.text             font_size: 15             text_size: self.width, none             color: [0,255,0,1]             padding_x: 20             size_hint_y: none             pos_hint: {"left":1, "top":1}             height: self.texture_size[1]              actionbar:         pos_hint: {'top':1}         actionview:             use_separator: true             actionprevious:                 title: "text"                 with_previous: false             actionoverflow:             actionbutton:                 text: "new"                 on_release: app.root.current = "add"             actionbutton:                 text: "update"                 on_press: root.clicked()             actionbutton:                 text: "add"                 on_release: app.root.current = "append"   <addscreen>:     name: "add"     floatlayout:          scattertextwidget  <appendscreen>:     name: "append"     floatlayout:         appendtextwidget          '''   class scattertextwidget(boxlayout):     def savetofile(self,name,text):         f = open(name, "w")         f.write("\n\n\n" + "    " + ">>>" + text + "test"*500)         f.close()  class appendtextwidget(boxlayout):     text = stringproperty("")     def append(self,text):         open("archive.txt", "a") f:             f.write("\n" + "    " + ">>>" + text)             f.close()     class scrollablelabel(scrollview):      text = stringproperty('')      pass   class mainscreen(screen):     text = stringproperty("")      def clicked(self):         open("archive.txt", "r") f:             contents = f.read()             self.text = contents     pass  class addscreen(screen):     pass  class appendscreen(screen):     pass      class myapp(app):      def build(self):         return builder.load_string(kv)    if __name__ == '__main__':     myapp().run()

why works:

your text in mainscreen updated file, passed label , text loaded. scrollablelabel.text stays unchanged.

why doesn't work expect:

there's no communication between classes, therefore text changed actual self.text = mainscreen.text

how make work:

either use on global range, i.e. variable in app class, a = app.get_running_app() , access variable through a.<variable> or use __init__ initialize scrollablelabel inside mainscreen , pass text

so it's duplicate of this , 1 duplicate of older unsimplified question.


Comments

Post a Comment

Popular posts from this blog

java - Run spring boot application error: Cannot instantiate interface org.springframework.context.ApplicationListener -

-
i have spring project , try make use spring boot , run @ embadded tomcat following : https://spring.io/guides/gs/rest-service/ this application //@configuration //@enableaspectjautoproxy @springbootapplication @componentscan(basepackages = "gux.prome") public class application { public static void main(string[] args) { springapplication.run(application.class, args); } } if use maven command: mvn spring-boot:run , project starts fine, need debug , run main method @ intelij, exception occurs: exception in thread "main" java.lang.illegalargumentexception: cannot instantiate interface org.springframework.context.applicationlistener : org.springframework.boot.logging.classpathloggingapplicationlistener @ org.springframework.boot.springapplication.createspringfactoriesinstances(springapplication.java:414) @ org.springframework.boot.springapplication.getspringfactoriesinstances(springapplication.java:394) @ org.springframework.bo...
Read more

python - pip wont install .WHL files -

-
when try install .whl gohike typing cmd c:\users\owner\downloads>pip install ta_lib-0.4.9-cp27-none-win_amd64.whl i print out: `processing c:\users\owner\downloads\ta_lib-0.4.9-cp27-none-win_amd64.whl complete output command python setup.py egg_info: traceback <most recent call last>: file "<string>", line 1, in <module> ioerror: [errno 2] no such file or directory:'c:\\users\\owner\\appdata\\lo cal\\temp\\pip-9gwk2c-build\\setup.py' ----------------------------------------- command "python setup.py egg_info" failed error code 1 in c:\users\owner\ap pdata\local\temp\pip-9gwk2c-build\` the part between pip- , -build in pip-9gwk2c-build different on same file. i asked python 2.7.11 pip 8.0.3 can't install gohike whl of ta-lib 0.4.9 few days ago , decided ask differently. can me! you have outdated pip not understand wheels. wheels not supposed have setup.py inside. try upgrading pip pip in...
Read more

Excel VBA "Microsoft Windows Common Controls 6.0 (SP6)" Location Changes -

-
i have excel workbook used generate quotations customers. there main page user inputs data, , there buttons generate various pdfs , send them customer. however, 1 user consistently getting error preventing generating , sending pdfs. i beleive "microsoft windows common controls 6.0 (sp6)". it's installed on users' computers. on mine, location "c:\windows\syswow64\mscomctl.ocx" on others "c:\windows\system32\mscomctl.ocx" the user experiencing issues on 32-bit machine, "mscomctl.ocx" file should in system32. have manually put in there, , pointed common controls reference in vba it. issue seems keep reverting looking in syswow64. since folder doesn't exist, can't find it, , can't produce pdfs. i thought perhaps issue user running older version of office (2007) there users on 2013 , 2016. thought perhaps mixture of 64-bit , 32-bit users. user gets sent workbook other users (as quotation process goes further, gets passed ...
Read more