1 files changed, 236 insertions, 0 deletions
diff --git a/InCallUI/src/com/android/incallui/widget/multiwaveview/PointCloud.java b/InCallUI/src/com/android/incallui/widget/multiwaveview/PointCloud.java
new file mode 100644
index 000000000..77aac2bda
--- /dev/null
+++ b/InCallUI/src/com/android/incallui/widget/multiwaveview/PointCloud.java
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.incallui.widget.multiwaveview;
+
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.Paint;
+import android.graphics.drawable.Drawable;
+import android.util.FloatMath;
+import android.util.Log;
+
+import java.util.ArrayList;
+
+public class PointCloud {
+    private static final float MIN_POINT_SIZE = 2.0f;
+    private static final float MAX_POINT_SIZE = 4.0f;
+    private static final int INNER_POINTS = 8;
+    private static final String TAG = "PointCloud";
+    private ArrayList<Point> mPointCloud = new ArrayList<Point>();
+    private Drawable mDrawable;
+    private float mCenterX;
+    private float mCenterY;
+    private Paint mPaint;
+    private float mScale = 1.0f;
+    private static final float PI = (float) Math.PI;
+
+    // These allow us to have multiple concurrent animations.
+    WaveManager waveManager = new WaveManager();
+    GlowManager glowManager = new GlowManager();
+    private float mOuterRadius;
+
+    public class WaveManager {
+        private float radius = 50;
+        private float width = 200.0f; // TODO: Make configurable
+        private float alpha = 0.0f;
+        public void setRadius(float r) {
+            radius = r;
+        }
+
+        public float getRadius() {
+            return radius;
+        }
+
+        public void setAlpha(float a) {
+            alpha = a;
+        }
+
+        public float getAlpha() {
+            return alpha;
+        }
+    };
+
+    public class GlowManager {
+        private float x;
+        private float y;
+        private float radius = 0.0f;
+        private float alpha = 0.0f;
+
+        public void setX(float x1) {
+            x = x1;
+        }
+
+        public float getX() {
+            return x;
+        }
+
+        public void setY(float y1) {
+            y = y1;
+        }
+
+        public float getY() {
+            return y;
+        }
+
+        public void setAlpha(float a) {
+            alpha = a;
+        }
+
+        public float getAlpha() {
+            return alpha;
+        }
+
+        public void setRadius(float r) {
+            radius = r;
+        }
+
+        public float getRadius() {
+            return radius;
+        }
+    }
+
+    class Point {
+        float x;
+        float y;
+        float radius;
+
+        public Point(float x2, float y2, float r) {
+            x = (float) x2;
+            y = (float) y2;
+            radius = r;
+        }
+    }
+
+    public PointCloud(Drawable drawable) {
+        mPaint = new Paint();
+        mPaint.setFilterBitmap(true);
+        mPaint.setColor(Color.rgb(255, 255, 255)); // TODO: make configurable
+        mPaint.setAntiAlias(true);
+        mPaint.setDither(true);
+
+        mDrawable = drawable;
+        if (mDrawable != null) {
+            drawable.setBounds(0, 0, drawable.getIntrinsicWidth(), drawable.getIntrinsicHeight());
+        }
+    }
+
+    public void setCenter(float x, float y) {
+        mCenterX = x;
+        mCenterY = y;
+    }
+
+    public void makePointCloud(float innerRadius, float outerRadius) {
+        if (innerRadius == 0) {
+            Log.w(TAG, "Must specify an inner radius");
+            return;
+        }
+        mOuterRadius = outerRadius;
+        mPointCloud.clear();
+        final float pointAreaRadius =  (outerRadius - innerRadius);
+        final float ds = (2.0f * PI * innerRadius / INNER_POINTS);
+        final int bands = (int) Math.round(pointAreaRadius / ds);
+        final float dr = pointAreaRadius / bands;
+        float r = innerRadius;
+        for (int b = 0; b <= bands; b++, r += dr) {
+            float circumference = 2.0f * PI * r;
+            final int pointsInBand = (int) (circumference / ds);
+            float eta = PI/2.0f;
+            float dEta = 2.0f * PI / pointsInBand;
+            for (int i = 0; i < pointsInBand; i++) {
+                float x = r * FloatMath.cos(eta);
+                float y = r * FloatMath.sin(eta);
+                eta += dEta;
+                mPointCloud.add(new Point(x, y, r));
+            }
+        }
+    }
+
+    public void setScale(float scale) {
+        mScale  = scale;
+    }
+
+    public float getScale() {
+        return mScale;
+    }
+
+    private static float hypot(float x, float y) {
+        return FloatMath.sqrt(x*x + y*y);
+    }
+
+    private static float max(float a, float b) {
+        return a > b ? a : b;
+    }
+
+    public int getAlphaForPoint(Point point) {
+        // Contribution from positional glow
+        float glowDistance = hypot(glowManager.x - point.x, glowManager.y - point.y);
+        float glowAlpha = 0.0f;
+
+        if (glowDistance < glowManager.radius) {
+            float cosf = FloatMath.cos(PI * 0.25f * glowDistance / glowManager.radius);
+            glowAlpha = glowManager.alpha * max(0.0f, (float) Math.pow(cosf, 10.0f));
+        }
+
+        // Compute contribution from Wave
+        float radius = hypot(point.x, point.y);
+        float distanceToWaveRing = (radius - waveManager.radius);
+        float waveAlpha = 0.0f;
+        if (distanceToWaveRing < waveManager.width * 0.5f && distanceToWaveRing < 0.0f) {
+            float cosf = FloatMath.cos(PI * 0.25f * distanceToWaveRing / waveManager.width);
+            waveAlpha = waveManager.alpha * max(0.0f, (float) Math.pow(cosf, 20.0f));
+        }
+
+        return (int) (max(glowAlpha, waveAlpha) * 255);
+    }
+
+    private float interp(float min, float max, float f) {
+        return min + (max - min) * f;
+    }
+
+    public void draw(Canvas canvas) {
+        ArrayList<Point> points = mPointCloud;
+        canvas.save(Canvas.MATRIX_SAVE_FLAG);
+        canvas.scale(mScale, mScale, mCenterX, mCenterY);
+        for (int i = 0; i < points.size(); i++) {
+            Point point = points.get(i);
+            final float pointSize = interp(MAX_POINT_SIZE, MIN_POINT_SIZE,
+                    point.radius / mOuterRadius);
+            final float px = point.x + mCenterX;
+            final float py = point.y + mCenterY;
+            int alpha = getAlphaForPoint(point);
+
+            if (alpha == 0) continue;
+
+            if (mDrawable != null) {
+                canvas.save(Canvas.MATRIX_SAVE_FLAG);
+                final float cx = mDrawable.getIntrinsicWidth() * 0.5f;
+                final float cy = mDrawable.getIntrinsicHeight() * 0.5f;
+                final float s = pointSize / MAX_POINT_SIZE;
+                canvas.scale(s, s, px, py);
+                canvas.translate(px - cx, py - cy);
+                mDrawable.setAlpha(alpha);
+                mDrawable.draw(canvas);
+                canvas.restore();
+            } else {
+                mPaint.setAlpha(alpha);
+                canvas.drawCircle(px, py, pointSize, mPaint);
+            }
+        }
+        canvas.restore();
+    }
+
+}