55 lines
2.2 KiB
Rust
55 lines
2.2 KiB
Rust
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//! Widgets and utilities for making widgets to integrate VIZIA with NIH-plug.
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//!
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//! # Note
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//!
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//! None of these widgets are finalized, and their sizes or looks can change at any point. Feel free
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//! to copy the widgets and modify them to your personal taste.
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use nih_plug::{context::GuiContext, param::internals::ParamPtr};
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use std::sync::Arc;
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use vizia::Model;
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/// An event that updates a parameter's value. Since NIH-plug manages the parameters, interacting
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/// with parameter values with VIZIA works a little different from updating any other state. These
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/// events are automatically handled by `nih_plug_vizia`.
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#[derive(Debug, Clone, Copy)]
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pub enum ParamEvent {
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/// Begin an automation gesture for a parameter.
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BeginSetParameter(ParamPtr),
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/// Set a parameter to a new normalized value. This needs to be surrounded by a matching
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/// `BeginSetParameter` and `EndSetParameter`.
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SetParameterNormalized(ParamPtr, f32),
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/// Reset a parameter to its default value. This needs to be surrounded by a matching
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/// `BeginSetParameter` and `EndSetParameter`.
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ResetParameter(ParamPtr),
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/// End an automation gesture for a parameter.
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EndSetParameter(ParamPtr),
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}
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/// Handles parameter updates for VIZIA GUIs. Registered in
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/// [`ViziaEditor::spawn()`][super::ViziaEditor::spawn()].
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pub(crate) struct ParamModel {
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pub context: Arc<dyn GuiContext>,
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}
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impl Model for ParamModel {
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fn event(&mut self, _cx: &mut vizia::Context, event: &mut vizia::Event) {
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if let Some(param_event) = event.message.downcast() {
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match *param_event {
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ParamEvent::BeginSetParameter(p) => unsafe {
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self.context.raw_begin_set_parameter(p)
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},
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ParamEvent::SetParameterNormalized(p, v) => unsafe {
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self.context.raw_set_parameter_normalized(p, v)
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},
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ParamEvent::ResetParameter(p) => unsafe {
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let default_value = self.context.raw_default_normalized_param_value(p);
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self.context.raw_set_parameter_normalized(p, default_value);
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},
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ParamEvent::EndSetParameter(p) => unsafe { self.context.raw_end_set_parameter(p) },
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}
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}
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}
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}
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