Implemented the appear animation for the pattern security.

Also refactored AppearAnimationUtils slightly to support this.

Bug: 15163546
Change-Id: I411fad20c410875dcf7bc465ea545ed90aac187e

4 files changed, 193 insertions, 48 deletions

diff --git a/packages/Keyguard/res/values/dimens.xml b/packages/Keyguard/res/values/dimens.xml
index 01d9ab3..e9cdfcd 100644
--- a/packages/Keyguard/res/values/dimens.xml
+++ b/packages/Keyguard/res/values/dimens.xml
@@ -162,5 +162,5 @@
     <dimen name="big_font_size">120dp</dimen>
 
     <!-- The y translation to apply at the start in appear animations. -->
-    <dimen name="appear_y_translation_start">24dp</dimen>
+    <dimen name="appear_y_translation_start">32dp</dimen>
 </resources>
diff --git a/packages/Keyguard/src/com/android/keyguard/AppearAnimationCreator.java b/packages/Keyguard/src/com/android/keyguard/AppearAnimationCreator.java
new file mode 100644
index 0000000..0d30ea6
--- /dev/null
+++ b/packages/Keyguard/src/com/android/keyguard/AppearAnimationCreator.java
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2014 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.keyguard;
+
+import android.animation.Animator;
+import android.view.animation.Interpolator;
+
+/**
+ * An interface which can create animations when starting an appear animation with
+ * {@link com.android.keyguard.AppearAnimationUtils}
+ */
+public interface AppearAnimationCreator<T> {
+     void createAnimation(T animatedObject, long delay, long duration,
+            float startTranslationY, Interpolator interpolator, Runnable finishListener);
+}
diff --git a/packages/Keyguard/src/com/android/keyguard/AppearAnimationUtils.java b/packages/Keyguard/src/com/android/keyguard/AppearAnimationUtils.java
index ea896d5..6bb1f2c 100644
--- a/packages/Keyguard/src/com/android/keyguard/AppearAnimationUtils.java
+++ b/packages/Keyguard/src/com/android/keyguard/AppearAnimationUtils.java
@@ -16,84 +16,124 @@
 
 package com.android.keyguard;
 
-import android.animation.Animator;
-import android.animation.AnimatorListenerAdapter;
-import android.animation.TimeInterpolator;
 import android.content.Context;
 import android.view.View;
-import android.view.ViewPropertyAnimator;
 import android.view.animation.AnimationUtils;
 import android.view.animation.Interpolator;
 
 /**
  * A class to make nice appear transitions for views in a tabular layout.
  */
-public class AppearAnimationUtils {
+public class AppearAnimationUtils implements AppearAnimationCreator<View> {
 
     public static final long APPEAR_DURATION = 220;
 
     private final Interpolator mLinearOutSlowIn;
     private final float mStartTranslation;
+    private final AppearAnimationProperties mProperties = new AppearAnimationProperties();
+    private final float mDelayScale;
 
     public AppearAnimationUtils(Context ctx) {
+        this(ctx, 1.0f, 1.0f);
+    }
+
+    public AppearAnimationUtils(Context ctx, float delayScaleFactor,
+            float translationScaleFactor) {
         mLinearOutSlowIn = AnimationUtils.loadInterpolator(
                 ctx, android.R.interpolator.linear_out_slow_in);
-        mStartTranslation =
-                ctx.getResources().getDimensionPixelOffset(R.dimen.appear_y_translation_start);
+        mStartTranslation = ctx.getResources().getDimensionPixelOffset(
+                R.dimen.appear_y_translation_start) * translationScaleFactor;
+        mDelayScale = delayScaleFactor;
     }
 
-    public void startAppearAnimation(View[][] views, final Runnable finishListener) {
-        long maxDelay = 0;
-        ViewPropertyAnimator maxDelayAnimator = null;
-        for (int row = 0; row < views.length; row++) {
-            View[] columns = views[row];
+    public void startAppearAnimation(View[][] objects, final Runnable finishListener) {
+        startAppearAnimation(objects, finishListener, this);
+    }
+
+    public <T> void startAppearAnimation(T[][] objects, final Runnable finishListener,
+            AppearAnimationCreator<T> creator) {
+        AppearAnimationProperties properties = getDelays(objects);
+        startAnimations(properties, objects, finishListener, creator);
+    }
+
+    private <T> void startAnimations(AppearAnimationProperties properties, T[][] objects,
+            final Runnable finishListener, AppearAnimationCreator creator) {;
+        if (properties.maxDelayRowIndex == -1 || properties.maxDelayColIndex == -1) {
+            finishListener.run();
+            return;
+        }
+        for (int row = 0; row < properties.delays.length; row++) {
+            long[] columns = properties.delays[row];
             for (int col = 0; col < columns.length; col++) {
-                long delay = calculateDelay(row, col);
-                ViewPropertyAnimator animator = startAppearAnimation(columns[col], delay);
-                if (animator != null && delay > maxDelay) {
-                    maxDelay = delay;
-                    maxDelayAnimator = animator;
+                long delay = columns[col];
+                Runnable endRunnable = null;
+                if (properties.maxDelayRowIndex == row && properties.maxDelayColIndex == col) {
+                    endRunnable = finishListener;
                 }
+                creator.createAnimation(objects[row][col], delay, APPEAR_DURATION,
+                        mStartTranslation, mLinearOutSlowIn, endRunnable);
             }
         }
-        if (maxDelayAnimator != null) {
-            maxDelayAnimator.setListener(new AnimatorListenerAdapter() {
-                @Override
-                public void onAnimationEnd(Animator animation) {
-                    finishListener.run();
-                }
-            });
-        } else {
-            finishListener.run();
-        }
+
     }
 
-    private ViewPropertyAnimator startAppearAnimation(View view, long delay) {
-        if (view == null) return null;
-        view.setAlpha(0f);
-        view.setTranslationY(mStartTranslation);
-        view.animate()
-                .alpha(1f)
-                .translationY(0)
-                .setInterpolator(mLinearOutSlowIn)
-                .setDuration(APPEAR_DURATION)
-                .setStartDelay(delay)
-                .setListener(null);
-        if (view.hasOverlappingRendering()) {
-            view.animate().withLayer();
+    private <T> AppearAnimationProperties getDelays(T[][] items) {
+        long maxDelay = 0;
+        mProperties.maxDelayColIndex = -1;
+        mProperties.maxDelayRowIndex = -1;
+        mProperties.delays = new long[items.length][];
+        for (int row = 0; row < items.length; row++) {
+            T[] columns = items[row];
+            mProperties.delays[row] = new long[columns.length];
+            for (int col = 0; col < columns.length; col++) {
+                long delay = calculateDelay(row, col);
+                mProperties.delays[row][col] = delay;
+                if (items[row][col] != null && delay > maxDelay) {
+                    maxDelay = delay;
+                    mProperties.maxDelayColIndex = col;
+                    mProperties.maxDelayRowIndex = row;
+                }
+            }
         }
-        return view.animate();
+        return mProperties;
     }
 
     private long calculateDelay(int row, int col) {
-        return (long) (row * 40 + col * (Math.pow(row, 0.4) + 0.4) * 20);
+        return (long) ((row * 40 + col * (Math.pow(row, 0.4) + 0.4) * 20) * mDelayScale);
     }
 
-    public TimeInterpolator getInterpolator() {
+    public Interpolator getInterpolator() {
         return mLinearOutSlowIn;
     }
 
     public float getStartTranslation() {
         return mStartTranslation;
     }
+
+    @Override
+    public void createAnimation(View view, long delay, long duration, float startTranslationY,
+            Interpolator interpolator, Runnable endRunnable) {
+        if (view != null) {
+            view.setAlpha(0f);
+            view.setTranslationY(startTranslationY);
+            view.animate()
+                    .alpha(1f)
+                    .translationY(0)
+                    .setInterpolator(interpolator)
+                    .setDuration(duration)
+                    .setStartDelay(delay);
+            if (view.hasOverlappingRendering()) {
+                view.animate().withLayer();
+            }
+            if (endRunnable != null) {
+                view.animate().withEndAction(endRunnable);
+            }
+        }
+    }
+
+    public class AppearAnimationProperties {
+        public long[][] delays;
+        public int maxDelayRowIndex;
+        public int maxDelayColIndex;
+    }
 }
diff --git a/packages/Keyguard/src/com/android/keyguard/KeyguardPatternView.java b/packages/Keyguard/src/com/android/keyguard/KeyguardPatternView.java
index 5853ff9..e6de72f 100644
--- a/packages/Keyguard/src/com/android/keyguard/KeyguardPatternView.java
+++ b/packages/Keyguard/src/com/android/keyguard/KeyguardPatternView.java
@@ -21,6 +21,9 @@ import android.accounts.AccountManagerCallback;
 import android.accounts.AccountManagerFuture;
 import android.accounts.AuthenticatorException;
 import android.accounts.OperationCanceledException;
+import android.animation.Animator;
+import android.animation.AnimatorListenerAdapter;
+import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Rect;
 import android.graphics.drawable.Drawable;
@@ -28,10 +31,13 @@ import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.SystemClock;
 import android.os.UserHandle;
+import android.text.TextUtils;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.MotionEvent;
 import android.view.View;
+import android.view.ViewGroup;
+import android.view.animation.Interpolator;
 import android.widget.Button;
 import android.widget.LinearLayout;
 
@@ -41,7 +47,8 @@ import com.android.internal.widget.LockPatternView;
 import java.io.IOException;
 import java.util.List;
 
-public class KeyguardPatternView extends LinearLayout implements KeyguardSecurityView {
+public class KeyguardPatternView extends LinearLayout implements KeyguardSecurityView,
+        AppearAnimationCreator<LockPatternView.CellState> {
 
     private static final String TAG = "SecurityPatternView";
     private static final boolean DEBUG = KeyguardConstants.DEBUG;
@@ -59,6 +66,7 @@ public class KeyguardPatternView extends LinearLayout implements KeyguardSecurit
     private static final int MIN_PATTERN_BEFORE_POKE_WAKELOCK = 2;
 
     private final KeyguardUpdateMonitor mKeyguardUpdateMonitor;
+    private final AppearAnimationUtils mAppearAnimationUtils;
 
     private CountDownTimer mCountdownTimer = null;
     private LockPatternUtils mLockPatternUtils;
@@ -87,6 +95,8 @@ public class KeyguardPatternView extends LinearLayout implements KeyguardSecurit
     private SecurityMessageDisplay mSecurityMessageDisplay;
     private View mEcaView;
     private Drawable mBouncerFrame;
+    private ViewGroup mKeyguardBouncerFrame;
+    private KeyguardMessageArea mHelpMessage;
 
     enum FooterMode {
         Normal,
@@ -101,6 +111,8 @@ public class KeyguardPatternView extends LinearLayout implements KeyguardSecurit
     public KeyguardPatternView(Context context, AttributeSet attrs) {
         super(context, attrs);
         mKeyguardUpdateMonitor = KeyguardUpdateMonitor.getInstance(mContext);
+        mAppearAnimationUtils = new AppearAnimationUtils(context, 1.5f /* delayScale */,
+                2.0f /* transitionScale */);
     }
 
     public void setKeyguardCallback(KeyguardSecurityCallback callback) {
@@ -148,6 +160,9 @@ public class KeyguardPatternView extends LinearLayout implements KeyguardSecurit
         if (bouncerFrameView != null) {
             mBouncerFrame = bouncerFrameView.getBackground();
         }
+
+        mKeyguardBouncerFrame = (ViewGroup) findViewById(R.id.keyguard_bouncer_frame);
+        mHelpMessage = (KeyguardMessageArea) findViewById(R.id.keyguard_message_area);
     }
 
     private void updateFooter(FooterMode mode) {
@@ -403,8 +418,69 @@ public class KeyguardPatternView extends LinearLayout implements KeyguardSecurit
 
     @Override
     public void startAppearAnimation() {
-        // TODO: Fancy animation.
-        setAlpha(0);
-        animate().alpha(1).withLayer().setDuration(200);
+        enableClipping(false);
+        mAppearAnimationUtils.startAppearAnimation(
+                mLockPatternView.getCellStates(),
+                new Runnable() {
+                    @Override
+                    public void run() {
+                        enableClipping(true);
+                    }
+                },
+                this);
+        if (!TextUtils.isEmpty(mHelpMessage.getText())) {
+            mAppearAnimationUtils.createAnimation(mHelpMessage, 0,
+                    AppearAnimationUtils.APPEAR_DURATION,
+                    mAppearAnimationUtils.getStartTranslation(),
+                    mAppearAnimationUtils.getInterpolator(),
+                    null /* finishRunnable */);
+        }
+    }
+
+    private void enableClipping(boolean enable) {
+        setClipChildren(enable);
+        mKeyguardBouncerFrame.setClipToPadding(enable);
+        mKeyguardBouncerFrame.setClipChildren(enable);
+    }
+
+    @Override
+    public void createAnimation(final LockPatternView.CellState animatedCell, long delay,
+            long duration, float startTranslationY, Interpolator interpolator,
+            final Runnable finishListener) {
+        animatedCell.scale = 0.0f;
+        animatedCell.translateY = startTranslationY;
+        ValueAnimator animator = ValueAnimator.ofFloat(startTranslationY, 0.0f);
+        animator.setInterpolator(interpolator);
+        animator.setDuration(duration);
+        animator.setStartDelay(delay);
+        animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
+            @Override
+            public void onAnimationUpdate(ValueAnimator animation) {
+                float animatedFraction = animation.getAnimatedFraction();
+                animatedCell.scale = animatedFraction;
+                animatedCell.translateY = (float) animation.getAnimatedValue();
+                mLockPatternView.invalidate();
+            }
+        });
+        if (finishListener != null) {
+            animator.addListener(new AnimatorListenerAdapter() {
+                @Override
+                public void onAnimationEnd(Animator animation) {
+                    finishListener.run();
+                }
+            });
+
+            // Also animate the Emergency call
+            mAppearAnimationUtils.createAnimation(mEcaView, delay, duration, startTranslationY,
+            interpolator, null);
+
+            // And the forgot pattern button
+            if (mForgotPatternButton.getVisibility() == View.VISIBLE) {
+                mAppearAnimationUtils.createAnimation(mForgotPatternButton, delay, duration,
+                        startTranslationY, interpolator, null);
+            }
+        }
+        animator.start();
+        mLockPatternView.invalidate();
     }
 }