I want to scroll through the contents of my MDDialog using a scrollview but it is not displayed inside the widget at all. Here's the code:
from kivy.lang import Builder
from kivy.uix.image import Image
from kivy.uix.widget import Widget
from kivymd.app import MDApp
from kivymd.uix.boxlayout import MDBoxLayout
from kivymd.uix.button import MDButton, MDButtonText
from kivymd.uix.dialog import (
MDDialog, MDDialogIcon,
MDDialogHeadlineText, MDDialogSupportingText,
MDDialogButtonContainer, MDDialogContentContainer,
)
from kivymd.uix.divider import MDDivider
from kivymd.uix.fitimage import FitImage
from kivymd.uix.imagelist import MDSmartTile, MDSmartTileImage
from kivymd.uix.label import MDLabel
from kivymd.uix.list import (MDListItem,
MDListItemLeadingIcon, MDListItemSupportingText,
)
from kivymd.uix.scrollview import MDScrollView
KV = '''
MDScreen:
md_bg_color: self.theme_cls.backgroundColor
MDButton:
pos_hint: {'center_x': .5, 'center_y': .5}
on_release: app.show_alert_dialog()
MDButtonText:
text: "Show dialog"
'''
class MDDialogCustomContentContainer(MDDialogContentContainer):
def __init__(self, **kwargs):
super(MDDialogCustomContentContainer, self).__init__(**kwargs)
self.size_hint_y = None
self.adaptive_height = True
layout_root = MDScrollView(do_scroll_x=False, do_scroll_y=True)
layout = MDBoxLayout(orientation="vertical", size_hint=(1, None), adaptive_height=True,
padding="10dp", spacing="10dp")
layout.bind(minimum_height=layout.setter('height'))
img = FitImage(source="bear.png")
layout.add_widget(img)
for i in range(10):
layout.add_widget(MDLabel(text=f"text №{i}", adaptive_height=True))
self.add_widget(MDDivider())
layout_root.add_widget(layout)
self.add_widget(layout_root)
self.add_widget(MDDivider())
class Example(MDApp):
def build(self):
return Builder.load_string(KV)
def show_alert_dialog(self):
MDDialog(
# ----------------------------Icon-----------------------------
MDDialogIcon(icon="refresh",
),
# -----------------------Headline text-------------------------
MDDialogHeadlineText(text="Reset settings?",
),
# -----------------------Supporting text-----------------------
MDDialogSupportingText(text="This will reset your app preferences back to their "
"default settings. The following accounts will also "
"be signed out:",
),
# -----------------------Custom content------------------------
MDDialogCustomContentContainer(),
# ---------------------Button container------------------------
MDDialogButtonContainer(
Widget(), MDButton(
MDButtonText(text="Cancel"), style="text",
), MDButton(
MDButtonText(text="Accept"), style="text",
), spacing="8dp",
), # -------------------------------------------------------------
).open()
Example().run()
I tried to give layout and the MDDialogCustomContentContainer adaptive_height=True, but that didn't work out. I have also thought of giving all widgets a fixed height, but since there was an image that I want to display, I didn't know (and I still don't know) how to make that happen
I think you just need to specify some sizes (or perhaps do some linking to get sizes to adjust). Also, the MDDialogContentContainer is a BoxLayout, so there is no need to add another BoxLayout to it. Here is a modified version of your MDDialogCustomContentContainer:
class MDDialogCustomContentContainer(MDDialogContentContainer):
def __init__(self, **kwargs):
super(MDDialogCustomContentContainer, self).__init__(**kwargs)
self.size_hint_y = None
self.adaptive_height = True
layout_root = MDScrollView(do_scroll_x=False, do_scroll_y=True, size_hint_y=None, height=200)
img = FitImage(source='bear.png', size_hint=(None, None), size=(100, 1000), keep_ratio=False, allow_stretch=True)
self.add_widget(MDDivider())
layout_root.add_widget(img)
self.add_widget(layout_root)
self.add_widget(MDDivider())
Since you are setting adaptive_height to True in the MDDialogCustomContentContainer, it will try to use the smallest height that will contain its children. If the MDScrollView does not get assigned a height, the MDDialogCustomContentContainer will assume it has 0 height, so there will be nothing to scroll. So the above code specifies a height for the MDScrollView and for the FitImage.