Add spring animation when stashing transient taskbar.

Bug: 273961611 Change-Id: I35a658a5e30a155094a48effdefc3895f45e0483 Flag: ENABLE_TRANSIENT_TASKBAR Test: stash transient taskbar
2026-03-04 18:06:48 +00:00 · 2023-03-21 07:07:46 -07:00
parent 149246f077
commit 3344ec7004
11 changed files with 156 additions and 4 deletions
--- a/quickstep/src/com/android/launcher3/taskbar/TaskbarSpringOnStashController.java
+++ b/quickstep/src/com/android/launcher3/taskbar/TaskbarSpringOnStashController.java
@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2023 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.launcher3.taskbar;
+
+import static com.android.launcher3.anim.AnimatedFloat.VALUE;
+
+import android.animation.ValueAnimator;
+
+import androidx.annotation.Nullable;
+import androidx.dynamicanimation.animation.SpringForce;
+
+import com.android.launcher3.R;
+import com.android.launcher3.anim.AnimatedFloat;
+import com.android.launcher3.anim.SpringAnimationBuilder;
+import com.android.launcher3.taskbar.TaskbarControllers.LoggableTaskbarController;
+import com.android.launcher3.util.DisplayController;
+
+import java.io.PrintWriter;
+
+/**
+ * Manages the spring animation when stashing the transient taskbar.
+ */
+public class TaskbarSpringOnStashController implements LoggableTaskbarController {
+
+    private final TaskbarActivityContext mContext;
+    private TaskbarControllers mControllers;
+    private final AnimatedFloat mTranslationForStash = new AnimatedFloat(
+            this::updateTranslationYForStash);
+
+    private final boolean mIsTransientTaskbar;
+
+    private final float mStartVelocityPxPerS;
+
+    public TaskbarSpringOnStashController(TaskbarActivityContext context) {
+        mContext = context;
+        mIsTransientTaskbar = DisplayController.isTransientTaskbar(mContext);
+        mStartVelocityPxPerS = context.getResources()
+                .getDimension(R.dimen.transient_taskbar_stash_spring_velocity_dp_per_s);
+    }
+
+    /**
+     * Initialization method.
+     */
+    public void init(TaskbarControllers controllers) {
+        mControllers = controllers;
+    }
+
+    private void updateTranslationYForStash() {
+        if (!mIsTransientTaskbar) {
+            return;
+        }
+
+        float transY = mTranslationForStash.value;
+        mControllers.stashedHandleViewController.setTranslationYForStash(transY);
+        mControllers.taskbarViewController.setTranslationYForStash(transY);
+        mControllers.taskbarDragLayerController.setTranslationYForStash(transY);
+    }
+
+    /**
+     * Returns a spring animation to be used when stashing the transient taskbar.
+     */
+    public @Nullable ValueAnimator createSpringToStash() {
+        if (!mIsTransientTaskbar) {
+            return null;
+        }
+        return new SpringAnimationBuilder(mContext)
+                .setStartValue(mTranslationForStash.value)
+                .setEndValue(0)
+                .setDampingRatio(SpringForce.DAMPING_RATIO_MEDIUM_BOUNCY)
+                .setStiffness(SpringForce.STIFFNESS_LOW)
+                .setStartVelocity(mStartVelocityPxPerS)
+                .build(mTranslationForStash, VALUE);
+    }
+
+
+    @Override
+    public void dumpLogs(String prefix, PrintWriter pw) {
+        pw.println(prefix + "TaskbarSpringOnStashController:");
+
+        pw.println(prefix + "\tmTranslationForStash=" + mTranslationForStash.value);
+        pw.println(prefix + "\tmStartVelocityPxPerS=" + mStartVelocityPxPerS);
+    }
+}
+