How to update RecycleView data

[Electronic Part]

Hello,

I want a RecycleView which is updating every time i change the its data. In other words(auto refresh), i want RecycleView update itself and show the new data. Please provide a me a working example to show me how it works.

Any help would be appreciated  

[Andrei Sima]

Emmit and event after the data have been changed.

Make RecycleView, or other class at your convenience, listen to that and update the view from data.

This is how I would do it.

____________________

Andrei Sima

andre...@gmail.com

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[Electronic Part]

Could you please provide a code ? I don't know how to do that

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[Andrei Sima]

something like this will get you started:

class MyRecycleView(RecycleView):

    def __init__(self, uuid, **kwargs):
        super(MyRecycleView, self).__init__(**kwargs)
        self.register_event_type('on_obj_change')

    def on_object_change(self):
        # here you can update your recycled view from data
       


class MyClass(object):

    def update_object(self, index, val1, val2, val3):
        # here you can update your data
        # and after we emit a signal via dispatch

        MyRecycleView.dispatch('on_obj_change')

____________________

Andrei Sima

andre...@gmail.com

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[Andrei Sima]

    def __init__(self, uuid, **kwargs):

*    def __init__(self, **kwargs):

uuid was copy paste from another project.

[Electronic Part]

Thanks for your help. Could you give me a runable example? Sorry . I am new to kivy  

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[Andrei Sima]

Sorry, I do not have a runnable example that you can understand (new to Kivy).

It is using multiple files and is not new friendly.

You can take a look here:

https://github.com/andreisima/kivystore/blob/52a60b2929d9ba5a6d4acc9a930423aee6307e7c/store/managers/sensor_manager.py#L45

to see how I dispatch events on other classes/widgets.

If I have time today i will put together a small runnable example for you.

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[Electronic Part]

I got this error: 

Exception: Missing default handler <on_obj_change> in <PatientListWindow>

[Andrei Sima]

Here is a minimum running example.

I kept it as lightweight as I can so you can understand what is going on.

Dropped dispatch method since is bringing more complexity to the table.

main.py:

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout

Builder.load_file('main.kv')

class MainView(BoxLayout):

    data = {
        "sw1": {
            "uid": 1,
            "name": "sw1",
            "human_name": "Left Line",
            "other_param": "Some Random Str 1"
        },
        "sw2": {
            "uid": 2,
            "name": "sw2",
            "human_name": "Adiacent Line",
            "other_param": "Some Random Str 2"
        },
        "sw3": {
            "uid": 3,
            "name": "sw3",
            "human_name": "Centre Line",
            "other_param": "Some Random Str 3"
        },
        "sw4": {
            "uid": 4,
            "name": "sw4",
            "human_name": "Right Line",
            "other_param": "Some Random Str 4"
        },
        "sw5": {
            "uid": 5,
            "name": "sw5",
            "human_name": "Top Line",
            "other_param": "Some Random Str 5"
        }
    }

    def __init__(self, **kwargs):

        super(MainView, self).__init__(**kwargs)

        list_items = [k for k in self.data.keys()]
        self.table_data = []

        # this is done because i supply a dict of dicts and not a list of dicts

        for t in list_items:
            self.table_data.append(
                {
                    'label_text': self.data[t]['human_name'],
                    'sw_id': self.data[t]['uid'],
                    'label2_text': self.data[t]['other_param']
                }
            )
        self.ids.rv.data = self.table_data

    def on_obj_change(self, val):
        print(self.table_data[0]['label_text'])
        self.table_data[0]['label_text'] = val
        print(self.table_data[0]['label_text'])
        self.ids.rv.refresh_from_data()


class UpdateRVApp(App):

    def build(self):
        return MainView()


if __name__ == '__main__':
    UpdateRVApp().run()

main.kv:

<MainView>
    canvas.before:
        Color:
            rgba: 0.1, 0.5, 0.5, 1
        Rectangle:
            size: self.size
            pos: self.pos
    orientation: 'vertical'

    RecycleView:
        id: rv
        scroll_type: ['bars', 'content']
        scroll_wheel_distance: dp(100) # scrool step
        bar_width: dp(10)
        size_hint_y: .7
        viewclass: 'Row'

        RecycleBoxLayout:
            id: recycle_box_base
            default_size: None, dp(100)
            default_size_hint: 1, None
            size_hint_y: None
            height: self.minimum_height
            orientation: 'vertical'
            spacing: dp(10)
    BoxLayout:
        size_hint_y: .3
        Button:
            text: 'Update'

            # this will update the firt row label text to val

            on_release: root.on_obj_change(val='Other Name')

<Row@BoxLayout>
    label_text: ''       # Init data replaced by RV data
    label2_text: ''     # Init data replaced by RV data
    sw_id: 1             # Init data replaced by RV data
    Label:
        text: str(root.sw_id)
    Label:
        text: str(root.label_text)
    Label:
        text: str(root.label2_text)
   

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[Electronic Part]

Cloud you please how update by using an event? In other words,how to make an event and dispatch it and use it for updating  RecycleView ? Thanks for your help and your time as well

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[Elliot Garbus]

I have updated your code to update based on changes to the table_data.

table_data is changed to a ListProperty, the association of the table and the recycle view is now done in kv.

A timer fires every 3 seconds and adds an entry to the list, it is reflected on screen in the recycleview.

from kivy.app import App
from kivy.lang import Builder
from kivy.uix.boxlayout import BoxLayout

from kivy.properties import ListProperty, NumericProperty
from kivy.clock import Clock

Builder.load_file('main.kv')


class MainView(BoxLayout):

    table_data = ListProperty([])  # make table_data a ListProperty

        # self.table_data = []  Now a listProperty

        # this is done because i supply a dict of dicts and not a list of dicts
        for t in list_items:
            self.table_data.append(
                {
                    'label_text': self.data[t]['human_name'],
                    'sw_id': self.data[t]['uid'],
                    'label2_text': self.data[t]['other_param']
                }
            )

        #self.ids.rv.data = self.table_data  Assignment moved to KV

    def on_obj_change(self, val):
        print(self.table_data[0]['label_text'])
        self.table_data[0]['label_text'] = val
        print(self.table_data[0]['label_text'])
        self.ids.rv.refresh_from_data()


class UpdateRVApp(App):

    count = NumericProperty(6)  # you already have 5

    def build(self):
        return MainView()

    def add_row(self, dt):
        print('row added')
        self.root.table_data.append({'label_text': 'human_name' + str(self.count),
                                     'sw_id': 'uid' + str(self.count),
                                     'label2_text': 'Something Else' + str(self.count)})
        print(self.root.table_data)
        self.count += 1

    def on_start(self):
        Clock.schedule_interval(self.add_row, 3)

if __name__ == '__main__':
    UpdateRVApp().run()

----------------------------

<MainView>
    canvas.before:
        Color:
            rgba: 0.1, 0.5, 0.5, 1
        Rectangle:
            size: self.size
            pos: self.pos
    orientation: 'vertical'

    RecycleView:
        id: rv
        scroll_type: ['bars', 'content']
        scroll_wheel_distance: dp(100) # scrool step
        bar_width: dp(10)
        size_hint_y: .7
        viewclass: 'Row'

        data: root.table_data           # assignment moved from py to kv

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[Electronic Part]

Here is part of my code. I am getting data from sql server. It is not updating my  RecycleView  even by using stter and python property. It is workin when i rerun the code. Any idea what is going on?

class PatientListWindow(Screen,BoxLayout):
    data_items = ListProperty([])

    AP = ObjectProperty(None)

    def __init__(self, **kwargs):
        self.register_event_type('on_tabel_change')

        self.data_items=self.get_users()

        super(PatientListWindow, self).__init__(**kwargs)

    def restore(self):
        self.data_items = self.get_users()

    def do_something(self, value):
        # when do_something is called, the 'on_test' event will be
        # dispatched with the value
        self.dispatch('on_tabel_change', value)

    def on_tabel_change(self,*args):
         print ("I am dispatched", args)

    def on_custom_callback(*args):
        print('my on_custom_event is called with {}'.format(args))
    @property
    def update_tabel(self):
        return '{}'.format( self.data_items )

    @update_tabel.setter
    def update_tabel(self,val):
        self.data_items = val

    @property
    def update_tabel_data(self):
        return '{}'.format(self.ids.patient_tabel.data )

    @update_tabel_data.setter
    def update_tabel_data(self,val):
        self.ids.patient_tabel.data = [{'text': str(x)} for x in val]


    def update_user(self):
        self.update_tabel=self.get_users()
        self.update_tabel_data=self.get_users()
        print('New Data',self.data_items)
        self.ids.patient_tabel.data= [{'text': str(x)} for x in self.data_items]
        print(self.ids.patient_tabel.data)
        self.ids.patient_tabel.refresh_from_data()

    def get_users(self):
        db = DataBase()
        rows=db.get_patient_list()

class MyMainApp(App):



    def build(self):

        return kv

my_app = MyMainApp()
if __name__ == "__main__":
    # LS=strt_thread()
    # LS.start()
    # LS.join()
    my_app = MyMainApp()

    my_app.run()

and kivy side

BoxLayout:
    orientation: "vertical"
    GridLayout:
        height: 25
        cols: 7
        size_hint: .8, None
        pos_hint: {"x":0.3, "y":.6} if root.AP.is_language_english() else{"x":0.1, "y":.6}
        height: 25
        cols: 1
        PatientLabel:
            color: 0,0,0,1
            canvas.before:
                Color:
                    rgba: .7, .7, .7, 1
                Rectangle:
                    pos: self.pos
                    size: self.size
            text:get_display(arabic_reshaper.reshape('List of Patients')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('لیست بیماران')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape(' قائمة المرضى '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

    GridLayout:
        #size_hint: .7, None
        size_hint_y: None
        #pos_hint: {"x":0.6, "y":0.3}
        height: 25
        cols: 7
        size_hint: .8, None
        #size_hint_y: None
        #size_hint_x: .5
        pos_hint: {"x":0.3, "y":.6} if root.AP.is_language_english() else{"x":0.1, "y":.6}
        height: 25
        cols: 8

        PatientLabel:
            text:get_display(arabic_reshaper.reshape('File Number')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('شماره پرونده')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape(' رقم الملف '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

        PatientLabel:
            text:get_display(arabic_reshaper.reshape('Name')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('نام')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape(' اسم '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

        PatientLabel:
            text:get_display(arabic_reshaper.reshape('Last Name')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('نام خانوادگی')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape(' الكنية  '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large


        PatientLabel:
            text:get_display(arabic_reshaper.reshape("father's name")) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape(' نام پدر ')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape(' اسم الاب   '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

        PatientLabel:
            text:get_display(arabic_reshaper.reshape('National Number')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('کد ملی')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape('  الرقم الوطني '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

        PatientLabel:
            text:get_display(arabic_reshaper.reshape('Insurance Type')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('نوع بیمه')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape('  نوع التأمين  '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

        PatientLabel:
            text:get_display(arabic_reshaper.reshape('Insurance Number')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('شماره بیمه')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape('  رقم التأمين  '))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large
        PatientLabel:
            text:get_display(arabic_reshaper.reshape('Description')) if root.AP.is_language_english() else get_display(arabic_reshaper.reshape('توضیحات')) if root.AP.is_language_persian() else get_display(arabic_reshaper.reshape(' الوصف'))
            font_size:small if root.AP.is_font_small() else medium if root.AP.is_font_medium() else large

    BoxLayout:
        #size: 300,50
        #pos: 0,root.height*.5
        pos_hint: {"x":0.3, "y":.6} if root.AP.is_language_english() else{"x":0.1, "y":.6}
        size_hint: .8, 0.6
        RecycleView:
            id:patient_tabel
            viewclass: 'SelectableButton'
            data: [{'text': str(x)} for x in root.data_items]
            #data:[]
            SelectableRecycleGridLayout:
                cols: 8
                default_size: None, dp(26)
                default_size_hint: .6, None
                size_hint_x: 1
                height: self.minimum_height
                orientation: 'vertical'
                multiselect: True

                touch_multiselect: True  

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[Elliot Garbus]

You have a ListProperty data items that is storing a list of strings.

You are using a list comprehension in KV to convert the list of strings into a list of dictionaries.

My suggestion is to create a new ListProperty rv_data_items that maintains the list of dictionaries. 

In KV change:

data: [{'text': str(x)} for x in root.data_items]]

To:

       data: root.rv_data_items

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[Electronic Part]

Can you please explain me a little bit more? How make  rv_data_items in my code?

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[Elliot Garbus]

Here is an example, I hope this helps:

 

from kivy.app import App
from kivy.lang import Builder

from kivy.properties import ListProperty
from kivy.uix.boxlayout import BoxLayout

kv = """

<TestButton@Button>
    on_release: print(f'Button: {self.text} pressed')
TestBox:
    orientation: 'vertical'
    RecycleView:
        viewclass: 'TestButton'
        data: root.rv_data_list
        scroll_type: ['bars','content']
        bar_width: dp(20)
        do_scroll_x: False
        RecycleBoxLayout:
            default_size: None, dp(56)

            default_size_hint: 1, None
            size_hint_y: None
            height: self.minimum_height
            orientation: 'vertical'

    BoxLayout:
        size_hint_y: None
        height: dp(48)
        Button:
            text: 'Add pets'
            on_release: root.add_pets()
        Button:
            text: 'Remove pets'
            on_release: root.remove_pets()
"""


class TestBox(BoxLayout):
    rv_data_list = ListProperty([{'text': 'A' + str(n)} for n in range(4)] +
                                [{'text': 'B' + str(n)} for n in range(4)])

    pets = ['dog', 'cat', 'hamster', 'guinea pig', 'rabbit', 'parrot', 'snake']

    def list_to_rv_data(self, str_data):
        #  convert a list of strings to a list of dictionaries for the rv list
        return [{'text': s} for s in str_data]

    def rv_data_to_list(self, rv_data):
        # convert a list of  rv_data to a list of strings
        return [list(item.values())[0] for item in rv_data]

    def add_pets(self):
        self.rv_data_list = self.rv_data_list + self.list_to_rv_data(self.pets)

    def remove_pets(self):
        entries = self.rv_data_to_list(self.rv_data_list)
        no_pets = [d for d in entries if d not in self.pets]
        self.rv_data_list = self.list_to_rv_data(no_pets)


class RVTestApp(App):
    def build(self):
        return Builder.load_string(kv)


RVTestApp().run()

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[Electronic Part]

I got following error when i tried to use recycle view id in python side. Any help would be appreciated  

.kv

BoxLayout:

    scroll_type: ['bars', 'content']
    scroll_wheel_distance: dp(100) # scrool step

    RecycleView:
        id:patient_tabel
        viewclass: 'SelectableButton'
        data: [{'text': str(x)} for x in root.data_items]

        #data: root.data_items

        #data:[]
        SelectableRecycleGridLayout:
            cols: 8
            default_size: None, dp(26)
            default_size_hint: .6, None
            size_hint_x: 1
            height: self.minimum_height
            orientation: 'vertical'
            multiselect: True
            touch_multiselect: True

python side

class PatientListWindow(Screen,BoxLayout):
    data_items = ListProperty([])

    patient_tabel=ObjectProperty(None)
    

    def __init__(self, **kwargs):
        self.table_data = []
        self.data_items = self.get_users()
        self.table_data=[{'text': str(x)} for x in self.data_items]
     
        super(PatientListWindow, self).__init__(**kwargs)

and the error is
     self.ids.patient_tabel.data = []
   File "kivy\properties.pyx", line 863, in kivy.properties.ObservableDict.__getattr__
 AttributeError: 'super' object has no attribute '__getattr__'
 
 During handling of the above exception, another exception occurred:
 
 Traceback (most recent call last):
   File "D:/code/final_designe/persian_fona_design.py", line 1772, in <module>
     with open(current_folder_path+"/persian_fona.kv", encoding='utf-8') as f:  # Note the name of the .kv
 FileNotFoundError: [Errno 2] No such file or directory: 'D:\\code/persian_fona.kv'

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[Elliot Garbus]

As you know a runnable example would make it easier to help, but here are a few things that could be a problem:

 

Find the code that is causeing the problem:

self.ids.patient_tabel.data = []  Is this is Python or kv?  I’m assuming this is in your Python file, see below:

 

class PatientListWindow(Screen,BoxLayout):
    data_items = ListProperty([])
    patient_tabel=ObjectProperty(None)

you are declaring parient_tabel an object property in Python. It appears you want to create an easier to access copy of the id patient_tabel in Recyleview.  If that is the case, do something like the following:

 

class PatientListWindow(Screen,BoxLayout):
    data_items = ListProperty([])
    # patient_tabel=ObjectProperty(None)  Move the creation to KV

 

BoxLayout:

    patient_tabel: patient_tabel

   # ^ *** this creates an object property self.patient initiatlized to the id.  This should go at the top of <PatientListWindow>

    scroll_type: ['bars', 'content']
    scroll_wheel_distance: dp(100) # scrool step
    RecycleView:
        id:patient_tabel

A waring I see ‘patient_tabel’ and ‘data_table’

 

In the later exception:

open(current_folder_path+"/persian_fona.kv", encoding='utf-8')

 

use os.path.join to combine paths:  https://docs.python.org/3/library/os.path.html#os.path.join

 

from os.path import join

open(join(current_folder_path, “persian_fona.kv"), encoding='utf-8')

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[Electronic Part]

Hello,

I want to use this code . the body of my code is different but same concept. i tried initialize data on my python side and then update labels with new strings. My problem is the error i gave you. I can not get access to patient_tabel like the attach example.

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[Electronic Part]

By the way, too complicated to make a runable example since i got data from database 

[Elliot Garbus]

If you’d like more help, mock up some data and manually put it in the dictionary, and create a smaller example.  There is not enough info here for me to provide more help.

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[Electronic Part]

okay i will do that soon

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[Electronic Part]

Hello,

I made an example. I put an example of my data in this code. I think you can understand what i want to do by looking at this simple example 

[Electronic Part]

Here is a working one

[Electronic Part]

I can not access to patient_table which is id for recycle view. i added  patient_table: patient_table to top of the my PatientListWindows but still got this error

    self.ids.patient_tabel.data = []
   File "kivy\properties.pyx", line 863, in kivy.properties.ObservableDict.__getattr__
 AttributeError: 'super' object has no attribute '__getattr__'

That is the error can accrue for all ids not only this case. Could you please tell me how to solve it. if you need i can send you my PatientListWindows to be both on the same page

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[Electronic Part]

I think problem explained  here

https://www.reddit.com/r/kivy/comments/588tx7/how_can_i_use_init_for_screen_ids/ 

the solution does not work for me or i need add or change something. Please tell me how to do that?

[Electronic Part]

I solved the problem. Now, i will work on the main issue

[Elliot Garbus]

Glad to hear you got that working!

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[Electronic Part]

Still updating my recycle view data exist. Hope i solve it.  

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[Electronic Part]

Hello, Here i tried to make an example. As you see, I want to update my data and show new data(updated data)

[Electronic Part]

Sorry please check this one not previous version

[Elliot Garbus]

There are a number of problems here, but the fundamental problem is that you have not defined a viewclass that is capable of displaying your data.

The viewclass is applied to the data in the data list to create a set of widgets that get ‘recycled’.

 

For your data I created to following simplified viewclass:

<DataRecordButtons@BoxLayout>:
    filenumber: 'filenumber'  # These are all initial vales that will not be used
    name: 'name'
    lastname: 'lastname'
    fathername: 'fathername'
    nationalid: '123'
    insurancetype: 'insurancetype'
    insurancenumber: 'ins num'
    description: 'useful?'
    Button:
        text: root.filenumber
    Button:
        text: root.name
    Button:
        text: root.lastname
    Button:
        text: root.fathername
    Button:
        text: root.nationalid
    Button:
        text: root.nationalid
    Button:
        text: root.insurancetype
    Button:
        text: root.insurancenumber
    Button:
        text: root.description

This creates a horizontal list of buttons that display the text from the data record.

Also for your consideration:  I don't know why your are using multiple inheritance on MainView.  This is a screen that contains a BoxLayout.  It would be more straight forward to move the Boxlayout into the screen, rather than inheriting from it.  The MainView 'is a' screen that 'has a' Boxlayout. 

[Electronic Part]

Thanks for you answer. That was absolutely helpful. just one problem in your code. Why do i have 9 columns instead of 8?

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[Electronic Part]

Actually, nationalid column has been shown twice

[Electronic Part]

Got it. Just comment these two lines. 

#Button:
#    text: root.nationalid

[Electronic Part]

Now my problem is how to update patient list. To be clear please attend to my example. Assume i have two columns. i want to add another column and edit one of them and also delete another one. So, i want to change patient list with new data that i am getting from database. How does it work? Here is extension  of your code. just in on_object_change i want to update the table with new data.

 self.data_items = self.get_users()
 self.table_data=[]
 for i in range(int(len(self.data_items)/8)):
     temp={'filenumber': str(self.data_items[(i*8)]),
           'name': str(self.data_items[(i*8)+1]),
           'lastname': str(self.data_items[(i*8)+2]),
           'fathername': str(self.data_items[(i*8)+3]),
           'nationalid': str(self.data_items[(i*8)+4]),
           'insurancetype': str(self.data_items[(i*8)+5]),
           'insurancenumber':str(self.data_items[(i*8)+6]),
           'description': str(self.data_items[(i*8)+7]) }
     self.table_data.append(temp)
     temp = {}
#self.table_data=[{'filenumber': '10','name': 'Henry', 'lastname': 'ln12', 'fathername': '12',
#     'nationalid': '123','insurancetype': '123456', 'insurancenumber': '12', 'description': 'None'},
#     {'filenumber': '20', 'name': 'Elctrnc', 'lastname': 'Part', 'fathername': 'Dad',
#     'nationalid': 'USA ', 'insurancetype': 'Exp ', 'insurancenumber': '77', 'description': '$$$'}]

Problem is when i press update button new data will add to the old ones

[Electronic Part]

I got it. Just 

self.data_items=[]

self.data_items = self.get_users()
self.table_data=[]
for i in range(int(len(self.data_items)/8)):
    temp={'filenumber': str(self.data_items[(i*8)]),
          'name': str(self.data_items[(i*8)+1]),
          'lastname': str(self.data_items[(i*8)+2]),
          'fathername': str(self.data_items[(i*8)+3]),
          'nationalid': str(self.data_items[(i*8)+4]),
          'insurancetype': str(self.data_items[(i*8)+5]),
          'insurancenumber':str(self.data_items[(i*8)+6]),
          'description': str(self.data_items[(i*8)+7]) }
    self.table_data.append(temp)

[Elliot Garbus]

Glad you have it working!

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[Electronic Part]

Just as my last question in this part, How i can add scrollview to patient list window. I am sure i will have a lot of patients in future. I need to scroll up and down  

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[Elliot Garbus]

Good news, your recycle view already scrolls.

 

Try replacing get_users() with:

def get_users(self):
    return [str(i) for i in range((800))]

 

to test it.

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[Electronic Part]

Thanks.  it is better to keep it simple. just need to open a pop up when i click on buttons. I don't know. Could you please let me know how to do that?

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[Elliot Garbus]

You can add a popup the same as you add an action to any button.

In the attached example I use the Factory to instance the PopUp, and customize the popup instance using key word arguments.

TestBox(BoxLayout):
    rv_data_list = ListProperty([{'text': 'A' + str(n)} <span style="font

[Electronic Part]

I really appreciate your help. You answers are prefect. Could you please tell me  how change title. I know how to do that by using title:'My Title' but what about when the title be in different language. I used this command 

font_name:'fonts/DejaVuSans.ttf'

title: str(arabic_reshaper.reshape('Patient Info')) #if root.is_language_english() else str(get_display(arabic_reshaper.reshape('ویرایش کنید')))

Thanks

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[Elliot Garbus]

The font for the title in a PopUp is title_font.  Then pass in the title text, or hard code it here.

<DataRecordDialog>:                                   # The definition of the popup
    size_hint: .7, .7
    title_font:'fonts/DejaVuSans.ttf'
    BoxLayout:
        orientation: 'vertical'
        Label:
            text: root.name
        Label:
            text: root.msg
        Button:
            size_hint_y: None
            height: dp(48)
            text:'OK'
            on_release: root.dismiss()

 

I imagine you are using the selected font all over your code.  You might be able to simplify things by redefining Label to have a different font, this is another way to change the font in the Popup.

 

<Label>:

    -font_name: 'fonts/DejaVuSans.ttf'

 

This will globally redefine he default font.  Buttons, Popups, Labels all get their text properties from Label,

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[Electronic Part]

Awesome. That works. Could you please let me know if there is any way i can position the title (something like pos_hint for title only) ? 

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[Electronic Part]

I don't know if i can change background color for popup . I did some search and understand it is possible to change background image . Is it possible to do that?

[Elliot Garbus]

See: title_align

https://kivy.org/doc/stable/api-kivy.uix.popup.html?highlight=popup#kivy.uix.popup.Popup.title_align

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[Elliot Garbus]

You can change the image. 

You can find the default image located at:

kivy/kivy/tools/theming/defaulttheme/modalview-background.png

 

copy the image, bring it into a photo/image editor, change as designed and save.

Then set background: ‘name_of_edited_image.png’

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[Electronic Part]

Great. Got it

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[Electronic Part]

Could you let me know how add vertical scroll bar to  recycle view?

[Electronic Part]

No need to answer. Here is what i found. Just add this to  recycle view

bar_width: 10
#bar_color: 1, 0, 0, 1   # red
bar_color: 0, 0, 1, 1   # red
bar_inactive_color: 0, 0, 1, 1   # blue
effect_cls: "ScrollEffect"
scroll_type: ['bars']