From 778aa79fc79e70071e7b71582a82c4665b773e04 Mon Sep 17 00:00:00 2001
From: Aaron Liu <aaronjli@google.com>
Date: Mon, 7 Mar 2022 18:33:49 +0000
Subject: [PATCH] Bouncer: Add error animation for buttons

Adds an animation for buttons when there is an incorrect entry.

Bug: 222541046
Test: Test on device
Change-Id: I4ac82e0b623d567f697b5bc62c082ae0d9561871
---
 .../KeyguardAbsKeyInputViewController.java    |  3 ++
 .../keyguard/KeyguardPinBasedInputView.java   | 51 +++++++++++++++++++
 .../KeyguardPinBasedInputViewController.java  |  6 +++
 3 files changed, 60 insertions(+)

diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java
index 7f456dba60530..eb418ff3b142a 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardAbsKeyInputViewController.java
@@ -194,9 +194,12 @@ public abstract class KeyguardAbsKeyInputViewController<T extends KeyguardAbsKey
                 mMessageAreaController.setMessage(mView.getWrongPasswordStringId());
             }
             mView.resetPasswordText(true /* animate */, false /* announce deletion if no match */);
+            startErrorAnimation();
         }
     }
 
+    protected void startErrorAnimation() { /* no-op */ }
+
     protected void verifyPasswordAndUnlock() {
         if (mDismissing) return; // already verified but haven't been dismissed; don't do it again.
 
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputView.java b/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputView.java
index 4723af2760c0e..c46e33d9fd532 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputView.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputView.java
@@ -24,6 +24,9 @@ import static com.android.keyguard.KeyguardSecurityView.PROMPT_REASON_RESTART;
 import static com.android.keyguard.KeyguardSecurityView.PROMPT_REASON_TIMEOUT;
 import static com.android.keyguard.KeyguardSecurityView.PROMPT_REASON_USER_REQUEST;
 
+import android.animation.Animator;
+import android.animation.AnimatorSet;
+import android.animation.ValueAnimator;
 import android.content.Context;
 import android.graphics.Rect;
 import android.util.AttributeSet;
@@ -32,6 +35,10 @@ import android.view.View;
 
 import com.android.internal.widget.LockscreenCredential;
 import com.android.systemui.R;
+import com.android.systemui.animation.Interpolators;
+
+import java.util.ArrayList;
+import java.util.List;
 
 /**
  * A Pin based Keyguard input view
@@ -188,4 +195,48 @@ public abstract class KeyguardPinBasedInputView extends KeyguardAbsKeyInputView
         return getContext().getString(
                 com.android.internal.R.string.keyguard_accessibility_pin_unlock);
     }
+
+    /**
+     * Begins an error animation for this view.
+     **/
+    public void startErrorAnimation() {
+        AnimatorSet animatorSet = new AnimatorSet();
+        List<Animator> animators = new ArrayList();
+        List<View> buttons = new ArrayList<>();
+        for (int i = 1; i <= 9; i++) {
+            buttons.add(mButtons[i]);
+        }
+        buttons.add(mDeleteButton);
+        buttons.add(mButtons[0]);
+        buttons.add(mOkButton);
+
+        int delay = 0;
+        for (int i = 0; i < buttons.size(); i++) {
+            final View button = buttons.get(i);
+            AnimatorSet animateWrapper = new AnimatorSet();
+            animateWrapper.setStartDelay(delay);
+
+            ValueAnimator scaleDownAnimator =  ValueAnimator.ofFloat(1f, 0.8f);
+            scaleDownAnimator.setInterpolator(Interpolators.STANDARD);
+            scaleDownAnimator.addUpdateListener(valueAnimator -> {
+                button.setScaleX((float) valueAnimator.getAnimatedValue());
+                button.setScaleY((float) valueAnimator.getAnimatedValue());
+            });
+            scaleDownAnimator.setDuration(50);
+
+            ValueAnimator scaleUpAnimator =  ValueAnimator.ofFloat(0.8f, 1f);
+            scaleUpAnimator.setInterpolator(Interpolators.STANDARD);
+            scaleUpAnimator.addUpdateListener(valueAnimator -> {
+                button.setScaleX((float) valueAnimator.getAnimatedValue());
+                button.setScaleY((float) valueAnimator.getAnimatedValue());
+            });
+            scaleUpAnimator.setDuration(617);
+
+            animateWrapper.playSequentially(scaleDownAnimator, scaleUpAnimator);
+            animators.add(animateWrapper);
+            delay += 33;
+        }
+        animatorSet.playTogether(animators);
+        animatorSet.start();
+    }
 }
diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputViewController.java b/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputViewController.java
index a9c03d1ac08ea..cc7e4f7a0d9a8 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputViewController.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardPinBasedInputViewController.java
@@ -134,4 +134,10 @@ public abstract class KeyguardPinBasedInputViewController<T extends KeyguardPinB
         mView.setPasswordEntryEnabled(true);
         mMessageAreaController.setMessage(R.string.keyguard_enter_your_pin);
     }
+
+    @Override
+    protected void startErrorAnimation() {
+        super.startErrorAnimation();
+        mView.startErrorAnimation();
+    }
 }