add background field

plotly · Apr 3, 2024 · cf15afa · cf15afa
1 parent 5b83d43
commit cf15afa
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Showing 3 changed files with 29 additions and 6 deletions.
diff --git a/src/app/callbacks.jl b/src/app/callbacks.jl
@@ -60,9 +60,9 @@ function callback!(func::Union{Function, ClientsideFunction, String},
      output::Union{Vector{<:Output}, Output},
      input::Union{Vector{<:Input}, Input},
      state::Union{Vector{<:State}, State} = State[];
-     prevent_initial_call = nothing
+     kwargs...
      )
-     return _callback!(func, app, CallbackDeps(output, input, state), prevent_initial_call = prevent_initial_call)
+     return _callback!(func, app, CallbackDeps(output, input, state); kwargs...)
 end
 
 """
@@ -99,13 +99,13 @@ end
 function callback!(func::Union{Function, ClientsideFunction, String},
      app::DashApp,
      deps::Dependency...;
-     prevent_initial_call = nothing
+     kwargs...
      )
      output = Output[]
      input = Input[]
      state = State[]
      _process_callback_args(deps, (output, input, state))
-     return _callback!(func, app, CallbackDeps(output, input, state, length(output) > 1), prevent_initial_call = prevent_initial_call)
+     return _callback!(func, app, CallbackDeps(output, input, state, length(output) > 1); kwargs...)
 end
 
 function _process_callback_args(args::Tuple{T, Vararg}, dest::Tuple{Vector{T}, Vararg}) where {T}
@@ -124,7 +124,10 @@ function _process_callback_args(args::Tuple{}, dest::Tuple{})
 end
 
 
-function _callback!(func::Union{Function, ClientsideFunction, String}, app::DashApp, deps::CallbackDeps; prevent_initial_call)
+function _callback!(func::Union{Function, ClientsideFunction, String}, app::DashApp, deps::CallbackDeps;
+    prevent_initial_call = nothing,
+    background = false,
+    manager = nothing)
 
     check_callback(func, app, deps)
 
@@ -138,7 +141,8 @@ function _callback!(func::Union{Function, ClientsideFunction, String}, app::Dash
                 deps,
                 isnothing(prevent_initial_call) ?
                     get_setting(app, :prevent_initial_callbacks) :
-                    prevent_initial_call
+                    prevent_initial_call,
+                background
             )
         )
 end

diff --git a/src/app/supporttypes.jl b/src/app/supporttypes.jl
@@ -112,6 +112,7 @@ struct Callback
     func ::Union{Function, ClientsideFunction}
     dependencies ::CallbackDeps
     prevent_initial_call ::Bool
+    background ::Bool
 end
 
 is_multi_out(cb::Callback) = cb.dependencies.multi_out == true

diff --git a/test/callbacks.jl b/test/callbacks.jl
@@ -657,3 +657,21 @@ end
     @test occursin("clientside[\"_dashprivate_my-div\"]", body)
     @test occursin("ns[\"children\"]", body)
 end
+
+@testset "Background callbacks" begin
+    app = dash()
+    app.layout = html_div() do 
+        html_div(html_p(id = "paragraph_id", children = ["Button not clicked"]))
+        html_button(id="buttton_id", children = "Run Job!")
+    end
+
+    callback!(app, Output("paragraph_id", "children"), Input("button_id", "n_clicks"), background = true) do clicks
+        sleep(2)
+        return string("Clicked ", clicks, " times")
+    end
+
+    handler = make_handler(app)
+    request = HTTP.Request("GET", "/_dash-dependencies")
+    resp = Dash.HttpHelpers.handle(handler, request)
+    deps = JSON3.read(String(resp.body))
+end