How to update the footer text?

[boeboe26]

I'm struggling to understand how to update the footer text after some keyboard event.

Here's what I have:

from vtk import *
from trame.app import get_server
from trame.widgets import vuetify, vtk
from trame.ui.vuetify import SinglePageLayout

server = get_server()
state, ctrl = server.state, server.controller
DEFAULT_RESOLUTION = 6

VTK_VIEW_EVENTS = [
   "KeyDown",
]

renderer = vtkRenderer()
renderWindow = vtkRenderWindow()
renderWindow.AddRenderer(renderer)

renderWindowInteractor = vtkRenderWindowInteractor()
renderWindowInteractor.SetRenderWindow(renderWindow)
renderWindowInteractor.GetInteractorStyle().SetCurrentStyleToTrackballCamera()

cone_source = vtkConeSource()
mapper = vtkPolyDataMapper()
actor = vtkActor()
mapper.SetInputConnection(cone_source.GetOutputPort())
actor.SetMapper(mapper)
renderer.AddActor(actor)
renderer.ResetCamera()
renderWindow.Render()

state.ui_text = "Welcome"

def event_listeners(events):
    result = {}
    for event in events:
        result[event] = (on_event, "[utils.vtk.event($event)]")
    return result

def on_event(*args, **kwargs):
    pressed_key = args[0]["key"]

    match pressed_key:
        case 'b':
            print("pressed b!")
            state.ui_text="pressed b!"
            #HELP HERE: HOW TO UPDATE THE FOOTER TEXT AFTER THAT?

with SinglePageLayout(server) as layout:
    with layout.content:
        with vuetify.VContainer(fluid=True, classes="pa-0 fill-height"):
            view = vtk.VtkLocalView(renderWindow, ref="view", 
                interactor_events=("event_types", VTK_VIEW_EVENTS),
                **event_listeners(VTK_VIEW_EVENTS))
            ctrl.view_update = view.update
            ctrl.view_reset_camera = view.reset_camera

    layout.footer.set_text(state.ui_text)

if __name__ == "__main__":
    server.start()

Thank you for your help

[jourdain]

layout.footer.set_text("The dynamic text will be next: {{ ui_text }}")

The template syntax can be found here

[boeboe26]

Amazing, it works! Thank you very much for your help.

Keep up the great work!