Add Z scaling during unfold to launcher

The unfold progresses are mapped to 0.85 - 1 range and set as a scale for launcher.

In case of multiple scale animations for workspace and hotseat, they are combined using MultiScaleProperty (e.g. opening an app while unfolding/going to all apps while unfolding). Note that this is a pretty difficult scenario to be in. If that happens, we multiply all values and bound the result between the max and min values.

Bug: 217368525
Test: atest MultiScalePropertyTest and manually
Change-Id: I6131c39f36deade0b7280c72edda2d72045344e9

3 files changed, 39 insertions, 3 deletions

diff --git a/quickstep/src/com/android/quickstep/util/LauncherUnfoldAnimationController.java b/quickstep/src/com/android/quickstep/util/LauncherUnfoldAnimationController.java
index 6b6bd6a8b3..333df10dde 100644
--- a/quickstep/src/com/android/quickstep/util/LauncherUnfoldAnimationController.java
+++ b/quickstep/src/com/android/quickstep/util/LauncherUnfoldAnimationController.java
@@ -15,9 +15,14 @@
  */
 package com.android.quickstep.util;
 
+import static com.android.launcher3.LauncherAnimUtils.SCALE_INDEX_UNFOLD_ANIMATION;
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY_FACTORY;
 import static com.android.launcher3.Utilities.comp;
 
 import android.annotation.Nullable;
+import android.util.FloatProperty;
+import android.util.MathUtils;
+import android.view.View;
 import android.view.WindowManager;
 import android.view.WindowManagerGlobal;
 
@@ -39,6 +44,8 @@ public class LauncherUnfoldAnimationController {
     // Percentage of the width of the quick search bar that will be reduced
     // from the both sides of the bar when progress is 0
     private static final float MAX_WIDTH_INSET_FRACTION = 0.15f;
+    private static final FloatProperty<View> UNFOLD_SCALE_PROPERTY =
+            SCALE_PROPERTY_FACTORY.get(SCALE_INDEX_UNFOLD_ANIMATION);
 
     private final Launcher mLauncher;
 
@@ -62,6 +69,8 @@ public class LauncherUnfoldAnimationController {
         // Animated in all orientations
         mProgressProvider.addCallback(new UnfoldMoveFromCenterWorkspaceAnimator(launcher,
                 windowManager));
+        mProgressProvider
+                .addCallback(new LauncherScaleAnimationListener());
 
         // Animated only in natural orientation
         mNaturalOrientationProgressProvider
@@ -120,4 +129,26 @@ public class LauncherUnfoldAnimationController {
             }
         }
     }
+
+    private class LauncherScaleAnimationListener implements TransitionProgressListener {
+
+        @Override
+        public void onTransitionStarted() {
+        }
+
+        @Override
+        public void onTransitionFinished() {
+            setScale(1);
+        }
+
+        @Override
+        public void onTransitionProgress(float progress) {
+            setScale(MathUtils.constrainedMap(0.85f, 1, 0, 1, progress));
+        }
+
+        private void setScale(float value) {
+            UNFOLD_SCALE_PROPERTY.setValue(mLauncher.getWorkspace(), value);
+            UNFOLD_SCALE_PROPERTY.setValue(mLauncher.getHotseat(), value);
+        }
+    }
 }
diff --git a/quickstep/src/com/android/quickstep/util/WorkspaceRevealAnim.java b/quickstep/src/com/android/quickstep/util/WorkspaceRevealAnim.java
index 7ae6cb7661..8659b687c3 100644
--- a/quickstep/src/com/android/quickstep/util/WorkspaceRevealAnim.java
+++ b/quickstep/src/com/android/quickstep/util/WorkspaceRevealAnim.java
@@ -15,7 +15,8 @@
  */
 package com.android.quickstep.util;
 
-import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
+import static com.android.launcher3.LauncherAnimUtils.SCALE_INDEX_REVEAL_ANIM;
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY_FACTORY;
 import static com.android.launcher3.LauncherState.BACKGROUND_APP;
 import static com.android.launcher3.LauncherState.NORMAL;
 import static com.android.launcher3.anim.PropertySetter.NO_ANIM_PROPERTY_SETTER;
@@ -27,6 +28,7 @@ import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
+import android.util.FloatProperty;
 import android.view.View;
 
 import com.android.launcher3.BaseQuickstepLauncher;
@@ -49,6 +51,8 @@ public class WorkspaceRevealAnim {
 
     // Should be used for animations running alongside this WorkspaceRevealAnim.
     public static final int DURATION_MS = 350;
+    private static final FloatProperty<View> REVEAL_SCALE_PROPERTY =
+            SCALE_PROPERTY_FACTORY.get(SCALE_INDEX_REVEAL_ANIM);
 
     private final float mScaleStart;
     private final AnimatorSet mAnimators = new AnimatorSet();
@@ -90,7 +94,7 @@ public class WorkspaceRevealAnim {
     }
 
     private void addRevealAnimatorsForView(View v) {
-        ObjectAnimator scale = ObjectAnimator.ofFloat(v, SCALE_PROPERTY, mScaleStart, 1f);
+        ObjectAnimator scale = ObjectAnimator.ofFloat(v, REVEAL_SCALE_PROPERTY, mScaleStart, 1f);
         scale.setDuration(DURATION_MS);
         scale.setInterpolator(Interpolators.DECELERATED_EASE);
         mAnimators.play(scale);
@@ -103,7 +107,7 @@ public class WorkspaceRevealAnim {
         mAnimators.addListener(new AnimatorListenerAdapter() {
             @Override
             public void onAnimationEnd(Animator animation) {
-                SCALE_PROPERTY.set(v, 1f);
+                REVEAL_SCALE_PROPERTY.set(v, 1f);
                 v.setAlpha(1f);
             }
         });
diff --git a/quickstep/src/com/android/quickstep/util/WorkspaceUnlockAnim.java b/quickstep/src/com/android/quickstep/util/WorkspaceUnlockAnim.java
index b01447ed27..aa3f0d7860 100644
--- a/quickstep/src/com/android/quickstep/util/WorkspaceUnlockAnim.java
+++ b/quickstep/src/com/android/quickstep/util/WorkspaceUnlockAnim.java
@@ -21,6 +21,7 @@ import com.android.launcher3.Utilities;
 /**
  * Animation to animate in a workspace during the unlock transition.
  */
+// TODO(b/219444608): use SCALE_PROPERTY_FACTORY once the scale is reset to 1.0 after unlocking.
 public class WorkspaceUnlockAnim {
     /** Scale for the workspace icons at the beginning of the animation. */
     private static final float START_SCALE = 0.9f;