Dropdown Menu Callbacks with Plotly

Feature Requests
1

Hi,

Is there scope to include callbacks for components such as dropdown menus to trigger callbacks that update another component, such as a plot?

If this is solved I feel it will solve an enormous business problem across the industry.

This is solved with Dash but Anvil makes the UI section of work on an app more inclusive in a team so I would love to be able to use Anvil instead.

Ed

2

Hello @eddyojb,

Do you mean this kind of callback?
Part 3. Basic Callbacks | Dash for Python Documentation | Plotly

If so, here’s a very simple version created with Anvil:
https://anvil.works/build#clone:4ESQOB6JGWLCC5XB=JBYDIYETBBSDXMADF56QDLL5

Anvil components can raise events. Here are the Events available for the DropDown component:

When an event is raised it will run the associated Python method. In the function you can update or create components:

def drop_down_1_change(self, **event_args):
    """This method is called when an item is selected"""
 
    self.label_3.text = self.drop_down_1.selected_value

Thanks,
Ryan

1 Like
3

@ryan , when i clone this and run it, if i make ‘Selection A’ my initial selection it doesn’t populate the label ( it does for Selection B & C ). I added a placeholder and that seemed to work. Not sure why this didn’t seem to work for Selection A ?