FFTView animation warning and preview mock data (#66)

AudioKit · Oct 9, 2022 · cd6964e · cd6964e
1 parent ea175bd
commit cd6964e
Showing 1 changed file with 21 additions and 2 deletions.
diff --git a/Sources/AudioKitUI/Visualizations/FFTView.swift b/Sources/AudioKitUI/Visualizations/FFTView.swift
@@ -12,6 +12,13 @@ class FFTModel: ObservableObject {
  var maxAmplitude: Float = 0.0
  var minAmplitude: Float = -70.0
  var referenceValueForFFT: Float = 12.0
+ @Environment(\.isPreview) var isPreview
+
+ init() {
+ if isPreview {
+ mockAudioInput()
+ }
+ }
 
  func updateNode(_ node: Node, fftValidBinCount: FFTValidBinCount? = nil) {
  if node !== self.node {
@@ -55,6 +62,18 @@ class FFTModel: ObservableObject {
  self.amplitudes = decibels
  }
  }
+
+ func mockAudioInput() {
+ var mockFloats = [Float]()
+ for _ in 0...65 {
+ mockFloats.append(Float.random(in: 0...0.1))
+ }
+ updateAmplitudes(mockFloats)
+ let waitTime: TimeInterval = 0.1
+ DispatchQueue.main.asyncAfter(deadline: .now() + waitTime) {
+ self.mockAudioInput()
+ }
+ }
 }
 
 public struct FFTView: View {
@@ -166,7 +185,7 @@ struct AmplitudeBar: View {
  Rectangle()
  .fill(backgroundColor)
  .mask(Rectangle().padding(.bottom, geometry.size.height * CGFloat(amplitude)))
- .animation(.easeOut(duration: 0.15))
+ .animation(.easeOut(duration: 0.15), value: amplitude)
 
  // White bar with slower animation for floating effect
  if includeCaps {
@@ -190,6 +209,6 @@ struct AmplitudeBar: View {
  .fill(Color.white)
  .frame(height: capHeight)
  .offset(x: 0.0, y: -height > capOffset - capHeight ? capMaxOffset : capOffset) // prevents offset from pushing cap outside of its frame
- .animation(.easeOut(duration: 0.6))
+ .animation(.easeOut(duration: 0.6), value: amplitude)
  }
 }