Quick snackbar

[coutinh...@gmail.com]

Hello friends.

I'm having some trouble with the snackbar.
They work, they appear as is in the kivymd demo, however they appear where they are not needed.

In the attached example I have the screen_lista.py file

In the on_enter event on line 111 of this file it should show the snackbar, the error is that it is showing the snackbar as soon as the application starts.

Any tips?

[Elliot Garbus]

Looks like you forgot to attach the file. 

Sent from my iPhone

On May 15, 2022, at 5:18 AM, coutinh...@gmail.com <coutinh...@gmail.com> wrote:

Hello friends.

--
You received this message because you are subscribed to the Google Groups "Kivy users support" group.
To unsubscribe from this group and stop receiving emails from it, send an email to kivy-users+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/c8bd4023-e806-4925-8a79-79ac0f480f34n%40googlegroups.com.

[Elias Coutinho]

Elliot, if you click on some points on the first screen, the snackbar appears, it should only appear in the list.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/FAC296E3-5EA7-4D3F-91E3-2021D93E7A53%40cox.net.

--

Elias Coutinho.
Aprender sobre alguns assuntos é fundamental.
Aprender sobre Deus é indiscutivelmente o melhor conteúdo.

[Elliot Garbus]

If the problem is you do not want to snackbar to be opened the first time the screen is entered, you can add a variable to track that.  See the example below.

 

class ScreenRecycleView(Screen):
    image_data = ListProperty()

    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.first_view = True

    def on_kv_post(self, base_widget):
        self.ids.rv.data = [
            {
                'source': choice(sample_images),
                'text': ''.join(sample(ascii_lowercase, 6))

            }
            for x in range(50)
        ]

    def on_enter(self):
        if self.first_view:
            self.first_view = False
        else:
            Snackbar(text='Após a pesquisa clique 2x na imagem.').open()

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CALgom8pjwREj8%3D75qxER-Ev%2Bz7nyf9t3m%3DHw0Lt%2BhrPx9Knm%2BQ%40mail.gmail.com.

 

[Elias Coutinho]

The problem is that I call the snackbar in the screen_lista file in the on_enter event, however on the login screen if I click anywhere other than a field it calls the snackbar incorrectly.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/62826323.1c69fb81.6cc1b.45baSMTPIN_ADDED_MISSING%40gmr-mx.google.com.

[Elliot Garbus]

I did not see this behavior.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CALgom8q1y7B6dXZRxLxGmQGT5MetSLi6tPCtdbce913M6Q2BLw%40mail.gmail.com.

 

[Elias Coutinho]

When the first screen appears, note that the snackbarr already appears, the correct thing would be to appear on the listing screen.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/628462e5.1c69fb81.2eed4.3d20SMTPIN_ADDED_MISSING%40gmr-mx.google.com.

[Elliot Garbus]

The on_enter event is firing in your nested screen manager, causing the snackbar to show up.  The snackbar is not attached to the screen so is displayed on the current screen.  Here is a possible workaround.

 

Add a screen to the nested screen_manager as a place holder.  This way the ScreenRecycleView will not be entered by default.

 

ScreenManager:
    id: screen_manager
    Screen:  # placeholder so ScreenRecycleView is not opened by default
    ScreenRecycleView:
    TelaLogin:
    TelaItem:

 

Then in your primary screen_manager, change to the ‘screen_listagem’ when entering the main screen.

ScreenManager:
    id: screen_manager_login

    TelaLogin:
        name: 'tela_login' 

    MainScreen:
        name: 'main_screen'
        on_enter: self.ids.screen_manager.current = 'screen_listagem'               
'''

 

This should fix the behavior of the SnackBar.

 

Things might be simpler if you did not nest your ScreenManagers.  They are both taking the full screen – so I don’t understand the utility of nesting them.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CALgom8oPj7xXyLdZt7SOfHfaSENPWCpWJNfgv9CwhfCo8KjJGQ%40mail.gmail.com.

 

[Elias Coutinho]

I think it's a bug, the problem continues.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/62855f56.1c69fb81.2004e.9b55SMTPIN_ADDED_MISSING%40gmr-mx.google.com.

[Elliot Garbus]

I don’t see buggy behavior. 

Sent from my iPhone

On May 20, 2022, at 3:32 PM, Elias Coutinho <coutinh...@gmail.com> wrote:



To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CALgom8r8sM7kNWxUKH%3D%3DdLGhyyGT%2BsK1UXORKWsAGNUV%2BxPrag%40mail.gmail.com.