Added color cycling to CircleRenderer

Author: Felix Palmer

src/com/pheelicks/visualizer/CircleRenderer.java

@@ -1,12 +1,14 @@
 package com.pheelicks.visualizer;
 
 import android.graphics.Canvas;
+import android.graphics.Color;
 import android.graphics.Paint;
 import android.graphics.Rect;
 
 public class CircleRenderer extends Renderer
 {
   private Paint mPaint;
+  private boolean mCycleColor;
 
   /**
    * Renders the audio data onto a pulsing circle
@@ -15,14 +17,35 @@ public class CircleRenderer extends Renderer
    */
   public CircleRenderer(Canvas canvas,
                           Paint paint)
+  {
+    this(canvas,
+         paint,
+         false);
+  }
+
+  /**
+   * Renders the audio data onto a pulsing circle
+   * @param canvas
+   * @param paint - Paint to draw lines with
+   * @param cycleColor - If true the color will change on each frame
+   */
+  public CircleRenderer(Canvas canvas,
+                        Paint paint,
+                        boolean cycleColor)
   {
     super(canvas);
     mPaint = paint;
+    mCycleColor = cycleColor;
   }
 
   @Override
   public void onRender(AudioData data, Rect rect)
   {
+    if(mCycleColor)
+    {
+      cycleColor();
+    }
+
     for (int i = 0; i < data.bytes.length - 1; i++) {
       float[] cartPoint = {
           (float)i / (data.bytes.length - 1),
@@ -69,4 +92,14 @@ private float[] toPolar(float[] cartesian, Rect rect)
     };
     return out;
   }
+
+  private float colorCounter = 0;
+  private void cycleColor()
+  {
+    int r = (int)Math.floor(128*(Math.sin(colorCounter) + 1));
+    int g = (int)Math.floor(128*(Math.sin(colorCounter + 2) + 1));
+    int b = (int)Math.floor(128*(Math.sin(colorCounter + 4) + 1));
+    mPaint.setColor(Color.argb(128, r, g, b));
+    colorCounter += 0.03;
+  }
 }

src/com/pheelicks/visualizer/VisualizerView.java

@@ -32,7 +32,6 @@ class VisualizerView extends View {
   private float[] mPoints;
   private Rect mRect = new Rect();
 
-  private Paint mCirclePaint = new Paint();
   private Paint mLinePaint = new Paint();
   private Paint mSpecialLinePaint = new Paint();
   private Paint mProgressLinePaint = new Paint();
@@ -59,10 +58,6 @@ public VisualizerView(Context context)
   private void init() {
     mBytes = null;
 
-    mCirclePaint.setStrokeWidth(3f);
-    mCirclePaint.setAntiAlias(true);
-    mCirclePaint.setColor(Color.argb(255, 222, 92, 143));
-
     mLinePaint.setStrokeWidth(1f);
     mLinePaint.setAntiAlias(true);
     mLinePaint.setColor(Color.argb(88, 0, 128, 255));
@@ -113,7 +108,6 @@ private void rotateColours()
     int g = (int)Math.floor(128*(Math.sin(colorCounter + 2) + 1));
     int b = (int)Math.floor(128*(Math.sin(colorCounter + 4) + 1));
     mLinePaint.setColor(Color.argb(128, r, g, b));
-    mCirclePaint.setColor(Color.argb(255, g, b, r));
     colorCounter += 0.03;
   }
 
@@ -160,7 +154,12 @@ protected void onDraw(Canvas canvas) {
       paint2.setColor(Color.argb(200, 11, 111, 233));
       mBarGraphRendererTop = new BarGraphRenderer(mCanvas, 4, paint2, true);
 
-      mCircleRenderer = new CircleRenderer(mCanvas, paint2);
+      Paint paint3 = new Paint();
+      paint3.setStrokeWidth(3f);
+      paint3.setAntiAlias(true);
+      paint3.setColor(Color.argb(255, 222, 92, 143));
+
+      mCircleRenderer = new CircleRenderer(mCanvas, paint3, true);
     }
 
     // Draw normal line - offset by amplitude