From e7a261ce367cee23c4d25d607e0c774823032e05 Mon Sep 17 00:00:00 2001
From: Elijah Voigt <elijah.caine.mv@gmail.com>
Date: Thu, 28 Sep 2023 20:29:04 -0700
Subject: [PATCH] Dynamic audio picking

---
 examples/hello-fmod.rs | 50 +++++++++++++++++++++++++++++-------------
 1 file changed, 35 insertions(+), 15 deletions(-)

diff --git a/examples/hello-fmod.rs b/examples/hello-fmod.rs
index ae4e333..02ddf5f 100644
--- a/examples/hello-fmod.rs
+++ b/examples/hello-fmod.rs
@@ -1,6 +1,8 @@
 //! This example demonstrates how to use the FmodPlugin to play a sound.
 //! Make sure to follow the instructions in the README.md to set up the demo project.
 
+use bevy::input::keyboard::KeyboardInput;
+use bevy::input::ButtonState;
 use bevy::prelude::*;
 use bevy_fmod::prelude::AudioSource;
 use bevy_fmod::prelude::*;
@@ -19,6 +21,7 @@ fn main() {
         ))
         .add_systems(Startup, startup)
         .add_systems(PostStartup, play_music)
+        .add_systems(Update, set_music)
         .run();
 }
 
@@ -55,20 +58,37 @@ fn startup(mut commands: Commands, studio: Res<FmodStudio>) {
 fn play_music(mut audio_sources: Query<&AudioSource, With<MyMusicPlayer>>) {
     if let Ok(audio_source) = audio_sources.get_single_mut() {
         audio_source.play();
-
-        info!(
-            "Parameter by name: {:?}",
-            audio_source
-                .event_instance
-                .get_parameter_by_name("Game State")
-                .expect("Get parameter")
-        );
-        match audio_source
-            .event_instance
-            .set_parameter_by_name("Game State", 5.0, true)
-        {
-            Ok(_) => (),
-            Err(e) => warn!("Error: {:?}", e),
-        };
     }
 }
+
+fn set_music(
+    mut events: EventReader<KeyboardInput>,
+    mut audio_sources: Query<&AudioSource, With<MyMusicPlayer>>,
+) {
+    events.iter().for_each(
+        |KeyboardInput {
+             key_code, state, ..
+         }| {
+            if let Ok(audio_source) = audio_sources.get_single_mut() {
+                let target = match state {
+                    ButtonState::Pressed => match key_code {
+                        Some(KeyCode::Key1) => 0.0,
+                        Some(KeyCode::Key2) => 1.0,
+                        Some(KeyCode::Key3) => 2.0,
+                        Some(KeyCode::Key4) => 3.0,
+                        Some(KeyCode::Key5) => 4.0,
+                        Some(KeyCode::Key6) => 5.0,
+                        _ => -1.0,
+                    },
+                    _ => -1.0,
+                };
+                if target >= 0.0 {
+                    audio_source
+                        .event_instance
+                        .set_parameter_by_name("Game State", target, true)
+                        .expect("Set audio parameter");
+                }
+            }
+        },
+    );
+}