Merge "Implement animateNavBarLongPress for stashed taskbar." into 24D1-dev

quickstep/src/com/android/launcher3/taskbar/StashedHandleView.java

@@ -15,9 +15,12 @@
  */
 package com.android.launcher3.taskbar;
 
+import static com.android.launcher3.LauncherAnimUtils.SCALE_PROPERTY;
+
 import android.animation.Animator;
 import android.animation.AnimatorListenerAdapter;
 import android.animation.ObjectAnimator;
+import android.animation.PropertyValuesHolder;
 import android.annotation.Nullable;
 import android.content.Context;
 import android.graphics.Rect;
@@ -111,4 +114,17 @@ public class StashedHandleView extends View {
             setBackgroundColor(newColor);
         }
     }
+
+    /**
+     * Updates the handle scale.
+     *
+     * @param scale target scale to animate towards (starting from current scale)
+     * @param durationMs milliseconds for the animation to take
+     */
+    public void animateScale(float scale, long durationMs) {
+        ObjectAnimator scaleAnim = ObjectAnimator.ofPropertyValuesHolder(this,
+                PropertyValuesHolder.ofFloat(SCALE_PROPERTY, scale));
+        scaleAnim.setDuration(durationMs).setAutoCancel(true);
+        scaleAnim.start();
+    }
 }

quickstep/src/com/android/launcher3/taskbar/StashedHandleViewController.java

@@ -57,6 +57,10 @@ public class StashedHandleViewController implements TaskbarControllers.LoggableT
     public static final int ALPHA_INDEX_HIDDEN_WHILE_DREAMING = 3;
     private static final int NUM_ALPHA_CHANNELS = 4;
 
+    // Values for long press animations, picked to most closely match navbar spec.
+    private static final float SCALE_TOUCH_ANIMATION_SHRINK = 0.85f;
+    private static final float SCALE_TOUCH_ANIMATION_EXPAND = 1.18f;
+
     /**
      * The SharedPreferences key for whether the stashed handle region is dark.
      */
@@ -324,7 +328,13 @@ public class StashedHandleViewController implements TaskbarControllers.LoggableT
 
     @Override
     public void animateNavBarLongPress(boolean isTouchDown, boolean shrink, long durationMs) {
-        // TODO(b/308693847): Animate similarly to NavigationHandle.java (SysUI).
+        float targetScale;
+        if (isTouchDown) {
+            targetScale = shrink ? SCALE_TOUCH_ANIMATION_SHRINK : SCALE_TOUCH_ANIMATION_EXPAND;
+        } else {
+            targetScale = 1f;
+        }
+        mStashedHandleView.animateScale(targetScale, durationMs);
     }
 
     @Override