How to open MDCard when I press a button in kivy(python)?

[mehdi alizade]

Hi, I have a button on a screen, I want to open MDCard when I press this button. I wrote this code the same as Popup but the MDCard object has no attribute 'open'.

#: import Factory kivy.factory.Factory

<Second>:
    FloatLayout:
        Button:
            text:"Open MDCard"
            size_hint: .3, .07 
            pos_hint: {"x":.07, "y":0.25} 
            on_release: Factory.MyMDCard().open()

<MyMDCard@MDCard>
    orientation: "vertical"
    canvas.before:
        Rectangle:
            pos: self.pos
            size: self.size
            source: 'Blue.png'

    FloatLayout:    
        Button:
            id: 'change'

[Elliot Garbus]

Instance the widget, then use the add_widget method to add the newly created widget to the layout. 

Sent from my iPhone

On Jul 10, 2021, at 10:04 AM, mehdi alizade <aliza...@gmail.com> wrote:



--
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/CAFSqpV%3DSziXsNP5pqo9JO6601o1BaumPhwEQeneodpHn1BZqog%40mail.gmail.com.

[Elliot Garbus]

Here is an example:

 

from kivymd.app import MDApp
from kivy.lang import Builder
from kivymd.uix.card import MDCard

kv = """
<BlankMDCard>:
    orientation: "vertical"
    padding: "8dp"
    size_hint: None, None
    size: "280dp", "180dp"
    pos_hint: {"center_x": .5, "center_y": .5}

    MDLabel:
        text: "The Title Goes Here"
        theme_text_color: "Secondary"
        size_hint_y: None
        height: self.texture_size[1]

    MDSeparator:
        height: "1dp"

    MDLabel:
        text: "The Body"


MDBoxLayout:
    orientation: 'vertical'
    MDLabel:
        text: 'Add an MDCard Widget'
        halign: 'center'
        size_hint_y: None
        height: 24
    FloatLayout:
        id: card
    MDRaisedButton:
        text: 'Add MDCard'
        on_release: app.add_card()
        pos_hint: {'center_x': 0.5}
        

"""


class BlankMDCard(MDCard):
    pass


class AddCardApp(MDApp):
    def build(self):
        return Builder.load_string(kv)

    def add_card(self):
        if not self.root.ids.card.children:
            self.root.ids.card.add_widget(BlankMDCard())  # add the card to the enclosing layout


AddCardApp().run()

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/327E4273-6C91-46D1-BC24-68895F0C462A%40cox.net.

 

[mehdi alizade]

It was a useful example. thank you

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/60e9e7c3.1c69fb81.d6f7.be1aSMTPIN_ADDED_MISSING%40gmr-mx.google.com.

[mehdi alizade]

I changed the code as follows.

#: import Factory kivy.factory.Factory

<Second>:
    FloatLayout:
        Button:
            text:"Open MDCard"
            size_hint: .3, .07 
            pos_hint: {"x":.07, "y":0.25} 

            on_release: root.add_widget(Factory.MyMDCard())

<MyMDCard@MDCard>
    orientation: "vertical"
    canvas.before:
        Rectangle:
            pos: self.pos
            size: self.size
            source: 'Blue.png'

    FloatLayout:    
        Button:

            text:"Close MDCard"
            on_release: ???

Now I put a button in the widget that I want to close by clicking on it. Can you help?

[Elliot Garbus]

The problem you may have with this code is that a new MyMDCard object is created everytime the button is pressed.  I suspect you do not want to create a new MDCard if the Card has already been created.

 

I have extended the previous example to add a remove button:

 

from kivymd.app import MDApp
from kivy.lang import Builder
from kivymd.uix.card import MDCard

kv = 

"""

<BlankMDCard>:
    orientation: "vertical"
    padding: "8dp"
    size_hint: None, None
    size: "280dp", "180dp"
    pos_hint: {"center_x": .5, "center_y": .5}

    MDLabel:
        text: "The Title Goes Here"
        theme_text_color: "Secondary"
        size_hint_y: None
        height: self.texture_size[1]

    MDSeparator:
        height: "1dp"

    MDLabel:
        text: "The Body"


MDBoxLayout:
    orientation: 'vertical'

    spacing: 2

    MDLabel:
        text: 'Add an MDCard Widget'
        halign: 'center'
        size_hint_y: None
        height: 24
    FloatLayout:
        id: card
    MDRaisedButton:
        text: 'Add MDCard'
        on_release: app.add_card()
        pos_hint: {'center_x': 0.5}

    MDRaisedButton:
        text: 'Remove MDCard'
        on_release: app.remove_card()
        pos_hint: {'center_x': 0.5}
        

"""

class BlankMDCard(MDCard):
    pass


class AddCardApp

(MDApp):
    def __init__(self, **kwargs):
        super().__init__(**kwargs)
        self.card = None   # used to hold the card instance

    def build(self):
        return Builder.load_string(kv)

    def add_card(self):
        if not self.card:
            self.card = BlankMDCard()
            self.root.ids.card.add_widget(self.card)  # add the card to the enclosing layout

    def remove_card(self):
        if self.card:
            self.root.ids.card.remove_widget(self.card)
            self.card = None

AddCardApp().run()

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/CAFSqpVnWPPT7c11YjWvTQ3k3nYz5rntTn7Pd1L_LeBHTPs98GA%40mail.gmail.com.

 

[mehdi alizade]

This is exactly what I want. Thank you so much.

To view this discussion on the web visit https://groups.google.com/d/msgid/kivy-users/60eb1cb0.1c69fb81.afd5d.9be4SMTPIN_ADDED_MISSING%40gmr-mx.google.com.