1 /* 2 * Copyright (C) 2021 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.launcher3.taskbar; 17 18 import static com.android.launcher3.LauncherState.TASKBAR; 19 import static com.android.launcher3.anim.Interpolators.ACCEL_DEACCEL; 20 import static com.android.launcher3.anim.Interpolators.LINEAR; 21 22 import androidx.annotation.Nullable; 23 24 import com.android.launcher3.BaseQuickstepLauncher; 25 import com.android.launcher3.LauncherState; 26 import com.android.launcher3.anim.PendingAnimation; 27 import com.android.launcher3.anim.PropertySetter; 28 import com.android.launcher3.statemanager.StateManager; 29 import com.android.launcher3.states.StateAnimationConfig; 30 import com.android.quickstep.AnimatedFloat; 31 32 /** 33 * StateHandler to animate Taskbar according to Launcher's state machine. Does nothing if Taskbar 34 * isn't present (i.e. {@link #setAnimationController} is never called). 35 */ 36 public class TaskbarStateHandler implements StateManager.StateHandler<LauncherState> { 37 38 private final BaseQuickstepLauncher mLauncher; 39 40 // Contains Taskbar-related methods and fields we should aniamte. If null, don't do anything. 41 private @Nullable TaskbarAnimationController mAnimationController = null; 42 TaskbarStateHandler(BaseQuickstepLauncher launcher)43 public TaskbarStateHandler(BaseQuickstepLauncher launcher) { 44 mLauncher = launcher; 45 } 46 setAnimationController(TaskbarAnimationController callbacks)47 public void setAnimationController(TaskbarAnimationController callbacks) { 48 mAnimationController = callbacks; 49 } 50 51 @Override setState(LauncherState state)52 public void setState(LauncherState state) { 53 setState(state, PropertySetter.NO_ANIM_PROPERTY_SETTER); 54 } 55 56 @Override setStateWithAnimation(LauncherState toState, StateAnimationConfig config, PendingAnimation animation)57 public void setStateWithAnimation(LauncherState toState, StateAnimationConfig config, 58 PendingAnimation animation) { 59 setState(toState, animation); 60 } 61 setState(LauncherState toState, PropertySetter setter)62 private void setState(LauncherState toState, PropertySetter setter) { 63 if (mAnimationController == null) { 64 return; 65 } 66 67 boolean isTaskbarVisible = (toState.getVisibleElements(mLauncher) & TASKBAR) != 0; 68 setter.setFloat(mAnimationController.getTaskbarVisibilityForLauncherState(), 69 AnimatedFloat.VALUE, isTaskbarVisible ? 1f : 0f, LINEAR); 70 setter.setFloat(mAnimationController.getTaskbarScaleForLauncherState(), 71 AnimatedFloat.VALUE, toState.getTaskbarScale(mLauncher), LINEAR); 72 setter.setFloat(mAnimationController.getTaskbarTranslationYForLauncherState(), 73 AnimatedFloat.VALUE, toState.getTaskbarTranslationY(mLauncher), ACCEL_DEACCEL); 74 } 75 } 76