Added seeking functionality, added more convenient listeners for java

app/src/main/java/rm/com/audiogram/AnotherActivity.java

@@ -4,6 +4,8 @@
 import android.os.Bundle;
 
 import rm.com.audiowave.AudioWaveView;
+import rm.com.audiowave.OnSamplingListener;
+import rm.com.audiowave.OnProgressListener;
 
 public class AnotherActivity extends Activity {
 
@@ -17,12 +19,28 @@ protected void onCreate(Bundle savedInstanceState) {
 
     waveView.setScaledData(data);
 
-//    waveView.setRawData(data, new Function0<Unit>() {
-//      @Override
-//      public Unit invoke() {
-//        Log.d("Set raw data", "Callback called");
-//        return null;
-//      }
-//    });
+    waveView.setRawData(data, new OnSamplingListener() {
+      @Override
+      public void onComplete() {
+
+      }
+    });
+
+    waveView.setOnProgressListener(new OnProgressListener() {
+      @Override
+      public void onStartTracking(float progress) {
+
+      }
+
+      @Override
+      public void onStopTracking(float progress) {
+
+      }
+
+      @Override
+      public void onProgressChanged(float progress, boolean byUser) {
+
+      }
+    });
   }
 }

app/src/main/kotlin/rm/com/audiogram/MainActivity.kt

@@ -3,6 +3,7 @@ package rm.com.audiogram
 import android.animation.ObjectAnimator
 import android.os.Bundle
 import android.support.v7.app.AppCompatActivity
+import android.util.Log
 import android.view.animation.LinearInterpolator
 import android.widget.Button
 import rm.com.audiowave.AudioWaveView
@@ -26,6 +27,10 @@ class MainActivity : AppCompatActivity() {
     play.setOnClickListener {
       inflateWave()
     }
+
+    wave.onStopTracking = {
+      Log.e("wave", "Progress set: $it")
+    }
   }
 
   fun inflateWave() {

app/src/main/res/layout/activity_main.xml

@@ -18,7 +18,7 @@
 		android:layout_alignParentBottom="true"
 		android:layout_margin="16dp"
 		app:chunkWidth="3dp"
-		app:chunkHeight="32dp"
+		app:chunkHeight="24dp"
 		app:minChunkHeight="2dp"
 		app:chunkSpacing="1dp"
 		app:chunkRadius="1dp"

audiowave/build.gradle

@@ -3,16 +3,13 @@ apply plugin: 'kotlin-android'
 
 android {
 	compileSdkVersion 25
-	buildToolsVersion "24.0.0"
+	buildToolsVersion "25.0.0"
 
 	defaultConfig {
 		minSdkVersion 15
 		targetSdkVersion 25
 		versionCode 1
 		versionName "1.0"
-
-		testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
-
 	}
 	buildTypes {
 		release {
@@ -26,7 +23,7 @@ android {
 }
 
 dependencies {
-	compile 'org.jetbrains.kotlin:kotlin-stdlib:1.0.4'
+	compile 'org.jetbrains.kotlin:kotlin-stdlib:1.0.5-2'
 }
 
 repositories {

audiowave/src/main/kotlin/rm/com/audiowave/AudioWaveView.kt

@@ -6,6 +6,7 @@ import android.graphics.Bitmap
 import android.graphics.Canvas
 import android.graphics.Color
 import android.util.AttributeSet
+import android.view.MotionEvent
 import android.view.View
 import android.view.animation.OvershootInterpolator
 
@@ -21,6 +22,14 @@ class AudioWaveView : View {
     inflateAttrs(attrs)
   }
 
+  var onProgressListener: OnProgressListener? = null
+
+  var onProgressChanged: (Float, Boolean) -> Unit = { progress, byUser -> Unit }
+
+  var onStartTracking: (Float) -> Unit = {}
+
+  var onStopTracking: (Float) -> Unit = {}
+
   var chunkHeight: Int = 0
     get() = if (field == 0) h else Math.abs(field)
     set(value) {
@@ -64,6 +73,10 @@ class AudioWaveView : View {
       require(value in 0..100) { "Progress must be in 0..100" }
 
       field = Math.abs(value)
+
+      onProgressListener?.onProgressChanged(field, isTouched)
+      onProgressChanged(field, isTouched)
+
       postInvalidate()
     }
 
@@ -85,6 +98,8 @@ class AudioWaveView : View {
       field = Math.max(400, value)
     }
 
+  var isTouched = false
+
   private val chunksCount: Int
     get() = w / chunkStep
 
@@ -150,6 +165,45 @@ class AudioWaveView : View {
     super.onLayout(changed, left, top, right, bottom)
   }
 
+  override fun onTouchEvent(event: MotionEvent?): Boolean {
+    event ?: return super.onTouchEvent(event)
+
+    when (event.action) {
+      MotionEvent.ACTION_DOWN -> {
+        isTouched = true
+        progress = event.toProgress()
+
+        // these paired calls look ugly, but we need them for Java
+        onProgressListener?.onStartTracking(progress)
+        onStartTracking(progress)
+
+        return true
+      }
+      MotionEvent.ACTION_MOVE -> {
+        isTouched = true
+        progress = event.toProgress()
+        return true
+      }
+      MotionEvent.ACTION_UP -> {
+        isTouched = false
+        onProgressListener?.onStopTracking(progress)
+        onStopTracking(progress)
+        return false
+      }
+      else -> {
+        isTouched = false
+        return super.onTouchEvent(event)
+      }
+    }
+  }
+
+  fun MotionEvent.toProgress() = this@toProgress.x.clamp(0F, w.toFloat()) / w * 100F
+
+  // Java convenience
+  fun setRawData(raw: ByteArray, callback: OnSamplingListener) {
+    setRawData(raw) { callback.onComplete() }
+  }
+
   @JvmOverloads
   fun setRawData(raw: ByteArray, callback: () -> Unit = {}) {
     MAIN_THREAD.postDelayed({

audiowave/src/main/kotlin/rm/com/audiowave/Graphics.kt

@@ -41,6 +41,8 @@ internal fun Int.withAlpha(alpha: Int): Int {
   return this and 0x00FFFFFF or (alpha shl 24)
 }
 
+internal fun Float.clamp(min: Float, max: Float) = Math.min(max, Math.max(this, min))
+
 internal fun Bitmap.inCanvas(): Canvas = Canvas(this)
 
 internal fun Bitmap?.safeRecycle() =

audiowave/src/main/kotlin/rm/com/audiowave/Listeners.kt

@@ -0,0 +1,15 @@
+package rm.com.audiowave
+
+/**
+ * Created by alex
+ */
+
+interface OnSamplingListener {
+  fun onComplete()
+}
+
+interface OnProgressListener {
+  fun onStartTracking(progress: Float)
+  fun onStopTracking(progress: Float)
+  fun onProgressChanged(progress: Float, byUser: Boolean)
+}

build.gradle

@@ -1,12 +1,12 @@
 // Top-level build file where you can add configuration options common to all sub-projects/modules.
 
 buildscript {
-	ext.kotlin_version = '1.0.4'
+	ext.kotlin_version = '1.0.5-2'
 	repositories {
 		jcenter()
 	}
 	dependencies {
-		classpath 'com.android.tools.build:gradle:2.2.0'
+		classpath 'com.android.tools.build:gradle:2.2.2'
 		classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
 
 		// NOTE: Do not place your application dependencies here; they belong