1 files changed, 107 insertions, 0 deletions
diff --git a/app/src/main/kotlin/com/pitchedapps/frost/views/AnimUtils.kt b/app/src/main/kotlin/com/pitchedapps/frost/views/AnimUtils.kt
new file mode 100644
index 00000000..a2a0dcff
--- /dev/null
+++ b/app/src/main/kotlin/com/pitchedapps/frost/views/AnimUtils.kt
@@ -0,0 +1,107 @@
+package com.pitchedapps.frost.views
+
+import android.animation.Animator
+import android.animation.AnimatorListenerAdapter
+import android.view.View
+import android.view.ViewAnimationUtils
+import android.view.animation.Animation
+import android.view.animation.AnimationUtils
+import android.view.animation.DecelerateInterpolator
+
+
+/**
+ * Created by Allan Wang on 2017-06-01.
+ */
+
+fun View.rootCircularReveal(x: Int = 0, y: Int = 0, duration: Long = 500L, onStart: (() -> Unit)? = null, onFinish: (() -> Unit)? = null) {
+    this.addOnLayoutChangeListener(object : View.OnLayoutChangeListener {
+        override fun onLayoutChange(v: View, left: Int, top: Int, right: Int, bottom: Int, oldLeft: Int, oldTop: Int,
+                                    oldRight: Int, oldBottom: Int) {
+            v.removeOnLayoutChangeListener(this)
+            var x2 = x
+            var y2 = y
+            if (x2 > right) x2 = 0
+            if (y2 > bottom) y2 = 0
+            val radius = Math.hypot(Math.max(x2, right - x2).toDouble(), Math.max(y2, bottom - y2).toDouble()).toInt()
+            val reveal = ViewAnimationUtils.createCircularReveal(v, x2, y2, 0f, radius.toFloat())
+            reveal.interpolator = DecelerateInterpolator(1f)
+            reveal.duration = duration
+            reveal.addListener(object : AnimatorListenerAdapter() {
+                override fun onAnimationStart(animation: Animator?) {
+                    visibility = View.VISIBLE
+                    onStart?.invoke()
+                }
+
+                override fun onAnimationEnd(animation: Animator?) = onFinish?.invoke() ?: Unit
+                override fun onAnimationCancel(animation: Animator?) = onFinish?.invoke() ?: Unit
+            })
+            reveal.start()
+        }
+    })
+}
+
+fun View.circularReveal(x: Int = 0, y: Int = 0, offset: Long = 0L, radius: Float = -1.0f, duration: Long = 500L, onStart: (() -> Unit)? = null, onFinish: (() -> Unit)? = null) {
+    if (!isAttachedToWindow) {
+        visibility = View.VISIBLE
+        return
+    }
+    var r = radius
+    if (r < 0.0f) {
+        r = Math.max(Math.hypot(x.toDouble(), y.toDouble()), Math.hypot((width - x.toDouble()), (height - y.toDouble()))).toFloat()
+    }
+    val anim = ViewAnimationUtils.createCircularReveal(this, x, y, 0f, r).setDuration(duration)
+    anim.startDelay = offset
+    anim.addListener(object : AnimatorListenerAdapter() {
+        override fun onAnimationStart(animation: Animator?) {
+            visibility = View.VISIBLE
+            onStart?.invoke()
+        }
+
+        override fun onAnimationEnd(animation: Animator?) = onFinish?.invoke() ?: Unit
+        override fun onAnimationCancel(animation: Animator?) = onFinish?.invoke() ?: Unit
+    })
+    anim.start()
+}
+
+fun View.fadeIn(offset: Long = 0L, duration: Long = 200L, onStart: (() -> Unit)? = null, onFinish: (() -> Unit)? = null) {
+    if (!isAttachedToWindow) {
+        visibility = View.VISIBLE
+        return
+    }
+    if (isAttachedToWindow) {
+        val anim = AnimationUtils.loadAnimation(context, android.R.anim.fade_in)
+        anim.startOffset = offset
+        anim.duration = duration
+        anim.setAnimationListener(object : Animation.AnimationListener {
+            override fun onAnimationRepeat(animation: Animation?) {}
+            override fun onAnimationEnd(animation: Animation?) = onFinish?.invoke() ?: Unit
+            override fun onAnimationStart(animation: Animation?) {
+                visibility = View.VISIBLE
+                onStart?.invoke()
+            }
+        })
+        startAnimation(anim)
+    }
+}
+
+fun View.fadeOut(offset: Long = 0L, duration: Long = 200L, onStart: (() -> Unit)? = null, onFinish: (() -> Unit)? = null) {
+    if (!isAttachedToWindow) {
+        visibility = View.INVISIBLE
+        return
+    }
+    val anim = AnimationUtils.loadAnimation(context, android.R.anim.fade_out)
+    anim.startOffset = offset
+    anim.duration = duration
+    anim.setAnimationListener(object : Animation.AnimationListener {
+        override fun onAnimationRepeat(animation: Animation?) {}
+        override fun onAnimationEnd(animation: Animation?) {
+            visibility = View.INVISIBLE
+            onFinish?.invoke()
+        }
+
+        override fun onAnimationStart(animation: Animation?) {
+            onStart?.invoke()
+        }
+    })
+    startAnimation(anim)
+}
+\ No newline at end of file