pulp::view::ParamSubscription Struct Reference

A live onParamChanged registration. More...

#include <param_subscription.hpp>

Public Attributes
std::uint32_t	id = 0
	Handle returned to JS.
state::ParamID	param_id = 0
	resolved once at subscribe time
std::string	param_name
	echoed in the payload
float	last_value = 0.0f
	Seeded from the store at subscribe time so subscribing is not itself reported as a change.
float	last_modulated = 0.0f
bool	has_playing = false
	The value a modulator is playing (StateStore::displayed_modulation), normalized; has_playing false when nothing modulates the parameter.
float	last_playing = 0.0f

Detailed Description

A live onParamChanged registration.

The handler itself stays in JS — CHOC's NativeFunction cannot carry a JSValue — so this holds only what the native side needs to decide whether to dispatch, and the id that keys the handler in the engine's __callbacks__ table.

Member Data Documentation

has_playing

bool pulp::view::ParamSubscription::has_playing = false

The value a modulator is playing (StateStore::displayed_modulation), normalized; has_playing false when nothing modulates the parameter.

id

std::uint32_t pulp::view::ParamSubscription::id = 0

Handle returned to JS.

Monotonic and never reused, so a stale offParamChanged() from a torn-down view cannot cancel a live subscription that happened to land in the same slot. Zero is never issued, and marks an entry tombstoned by a handler that unsubscribed mid-dispatch; those compact at the end of the pass.

last_modulated

float pulp::view::ParamSubscription::last_modulated = 0.0f

last_playing

float pulp::view::ParamSubscription::last_playing = 0.0f

last_value

float pulp::view::ParamSubscription::last_value = 0.0f

Seeded from the store at subscribe time so subscribing is not itself reported as a change.

NaN would defeat that — NaN != NaN would dispatch on the first frame.

param_id

state::ParamID pulp::view::ParamSubscription::param_id = 0

resolved once at subscribe time

param_name

std::string pulp::view::ParamSubscription::param_name

echoed in the payload

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The documentation for this struct was generated from the following file:

• /home/runner/work/pulp/pulp/core/view/include/pulp/view/param_subscription.hpp