Wiring Vizro Actions

Core concept: Source → Control → Target

All advanced interactions follow the same shape:

1. A source component triggers va.set_control when the user clicks it. Practical sources are vm.Graph and vm.AgGrid — they carry click-data (column values from the clicked point/cell) that can drive a dynamic filter. (vm.Figure/vm.Button/vm.Card technically support set_control too, but only with a hardcoded literal value, so they are not useful for cross-filtering.)
2. set_control writes a value into an intermediate control (vm.Filter or vm.Parameter) with an explicit id.
3. The control updates target components. Filter/Parameter targets are data-bearing components: vm.Graph, vm.AgGrid, vm.Figure, vm.Table.

The control is always explicit — you do not connect components directly. This makes interactions composable (you can wire multiple sources to the same control, or one source to multiple controls).

Built-in actions