| /* |
| * Copyright (C) 2021 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.LauncherState.TASKBAR; |
| import static com.android.launcher3.anim.Interpolators.LINEAR; |
| |
| import androidx.annotation.Nullable; |
| |
| import com.android.launcher3.BaseQuickstepLauncher; |
| import com.android.launcher3.LauncherState; |
| import com.android.launcher3.anim.PendingAnimation; |
| import com.android.launcher3.statemanager.StateManager; |
| import com.android.launcher3.states.StateAnimationConfig; |
| import com.android.quickstep.AnimatedFloat; |
| |
| /** |
| * StateHandler to animate Taskbar according to Launcher's state machine. Does nothing if Taskbar |
| * isn't present (i.e. {@link #setTaskbarCallbacks} is never called). |
| */ |
| public class TaskbarStateHandler implements StateManager.StateHandler<LauncherState> { |
| |
| private final BaseQuickstepLauncher mLauncher; |
| |
| // Contains Taskbar-related methods and fields we should aniamte. If null, don't do anything. |
| private @Nullable TaskbarController.TaskbarStateHandlerCallbacks mTaskbarCallbacks = null; |
| |
| public TaskbarStateHandler(BaseQuickstepLauncher launcher) { |
| mLauncher = launcher; |
| } |
| |
| public void setTaskbarCallbacks(TaskbarController.TaskbarStateHandlerCallbacks callbacks) { |
| mTaskbarCallbacks = callbacks; |
| } |
| |
| @Override |
| public void setState(LauncherState state) { |
| if (mTaskbarCallbacks == null) { |
| return; |
| } |
| |
| AnimatedFloat alphaTarget = mTaskbarCallbacks.getAlphaTarget(); |
| AnimatedFloat scaleTarget = mTaskbarCallbacks.getScaleTarget(); |
| boolean isTaskbarVisible = (state.getVisibleElements(mLauncher) & TASKBAR) != 0; |
| alphaTarget.updateValue(isTaskbarVisible ? 1f : 0f); |
| scaleTarget.updateValue(state.getTaskbarScale(mLauncher)); |
| } |
| |
| @Override |
| public void setStateWithAnimation(LauncherState toState, StateAnimationConfig config, |
| PendingAnimation animation) { |
| if (mTaskbarCallbacks == null) { |
| return; |
| } |
| |
| AnimatedFloat alphaTarget = mTaskbarCallbacks.getAlphaTarget(); |
| AnimatedFloat scaleTarget = mTaskbarCallbacks.getScaleTarget(); |
| boolean isTaskbarVisible = (toState.getVisibleElements(mLauncher) & TASKBAR) != 0; |
| animation.setFloat(alphaTarget, AnimatedFloat.VALUE, isTaskbarVisible ? 1f : 0f, LINEAR); |
| animation.setFloat(scaleTarget, AnimatedFloat.VALUE, toState.getTaskbarScale(mLauncher), |
| LINEAR); |
| } |
| } |