| /* |
| * Copyright (C) 2014 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.systemui.recents.views; |
| |
| import com.android.systemui.recents.Constants; |
| import com.android.systemui.recents.RecentsConfiguration; |
| import com.android.systemui.recents.model.Task; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| |
| /* The layout logic for a TaskStackView */ |
| public class TaskStackViewFilterAlgorithm { |
| |
| RecentsConfiguration mConfig; |
| TaskStackView mStackView; |
| ViewPool<TaskView, Task> mViewPool; |
| |
| public TaskStackViewFilterAlgorithm(RecentsConfiguration config, TaskStackView stackView, |
| ViewPool<TaskView, Task> viewPool) { |
| mConfig = config; |
| mStackView = stackView; |
| mViewPool = viewPool; |
| } |
| |
| /** Orchestrates the animations of the current child views and any new views. */ |
| void startFilteringAnimation(ArrayList<Task> curTasks, |
| ArrayList<TaskViewTransform> curTaskTransforms, |
| final ArrayList<Task> tasks, |
| final ArrayList<TaskViewTransform> taskTransforms) { |
| // Calculate the transforms to animate out all the existing views if they are not in the |
| // new visible range (or to their final positions in the stack if they are) |
| final ArrayList<TaskView> childrenToRemove = new ArrayList<TaskView>(); |
| final HashMap<TaskView, TaskViewTransform> childViewTransforms = |
| new HashMap<TaskView, TaskViewTransform>(); |
| int duration = getExitTransformsForFilterAnimation(curTasks, curTaskTransforms, tasks, |
| taskTransforms, childViewTransforms, childrenToRemove); |
| |
| // If all the current views are in the visible range of the new stack, then don't wait for |
| // views to animate out and animate all the new views into their place |
| final boolean unifyNewViewAnimation = childrenToRemove.isEmpty(); |
| if (unifyNewViewAnimation) { |
| int inDuration = getEnterTransformsForFilterAnimation(tasks, taskTransforms, |
| childViewTransforms); |
| duration = Math.max(duration, inDuration); |
| } |
| |
| // Animate all the views to their final transforms |
| for (final TaskView tv : childViewTransforms.keySet()) { |
| TaskViewTransform t = childViewTransforms.get(tv); |
| tv.animate().cancel(); |
| tv.animate() |
| .withEndAction(new Runnable() { |
| @Override |
| public void run() { |
| childViewTransforms.remove(tv); |
| if (childViewTransforms.isEmpty()) { |
| // Return all the removed children to the view pool |
| for (TaskView tv : childrenToRemove) { |
| mViewPool.returnViewToPool(tv); |
| } |
| |
| if (!unifyNewViewAnimation) { |
| // For views that are not already visible, animate them in |
| childViewTransforms.clear(); |
| int duration = getEnterTransformsForFilterAnimation(tasks, |
| taskTransforms, childViewTransforms); |
| for (final TaskView tv : childViewTransforms.keySet()) { |
| TaskViewTransform t = childViewTransforms.get(tv); |
| tv.updateViewPropertiesToTaskTransform(t, duration); |
| } |
| } |
| } |
| } |
| }); |
| tv.updateViewPropertiesToTaskTransform(t, duration); |
| } |
| } |
| |
| /** |
| * Creates the animations for all the children views that need to be animated in when we are |
| * un/filtering a stack, and returns the duration for these animations. |
| */ |
| int getEnterTransformsForFilterAnimation(ArrayList<Task> tasks, |
| ArrayList<TaskViewTransform> taskTransforms, |
| HashMap<TaskView, TaskViewTransform> childViewTransformsOut) { |
| int offset = 0; |
| int movement = 0; |
| int taskCount = tasks.size(); |
| for (int i = taskCount - 1; i >= 0; i--) { |
| Task task = tasks.get(i); |
| TaskViewTransform toTransform = taskTransforms.get(i); |
| if (toTransform.visible) { |
| TaskView tv = mStackView.getChildViewForTask(task); |
| if (tv == null) { |
| // For views that are not already visible, animate them in |
| tv = mViewPool.pickUpViewFromPool(task, task); |
| |
| // Compose a new transform to fade and slide the new task in |
| TaskViewTransform fromTransform = new TaskViewTransform(toTransform); |
| tv.prepareTaskTransformForFilterTaskHidden(fromTransform); |
| tv.updateViewPropertiesToTaskTransform(fromTransform, 0); |
| |
| toTransform.startDelay = offset * Constants.Values.TaskStackView.FilterStartDelay; |
| childViewTransformsOut.put(tv, toTransform); |
| |
| // Use the movement of the new views to calculate the duration of the animation |
| movement = Math.max(movement, |
| Math.abs(toTransform.translationY - fromTransform.translationY)); |
| offset++; |
| } |
| } |
| } |
| return mConfig.filteringNewViewsAnimDuration; |
| } |
| |
| /** |
| * Creates the animations for all the children views that need to be removed or to move views |
| * to their un/filtered position when we are un/filtering a stack, and returns the duration |
| * for these animations. |
| */ |
| int getExitTransformsForFilterAnimation(ArrayList<Task> curTasks, |
| ArrayList<TaskViewTransform> curTaskTransforms, |
| ArrayList<Task> tasks, ArrayList<TaskViewTransform> taskTransforms, |
| HashMap<TaskView, TaskViewTransform> childViewTransformsOut, |
| ArrayList<TaskView> childrenToRemoveOut) { |
| // Animate all of the existing views out of view (if they are not in the visible range in |
| // the new stack) or to their final positions in the new stack |
| int offset = 0; |
| int movement = 0; |
| int childCount = mStackView.getChildCount(); |
| for (int i = 0; i < childCount; i++) { |
| TaskView tv = (TaskView) mStackView.getChildAt(i); |
| Task task = tv.getTask(); |
| int taskIndex = tasks.indexOf(task); |
| TaskViewTransform toTransform; |
| |
| // If the view is no longer visible, then we should just animate it out |
| boolean willBeInvisible = taskIndex < 0 || !taskTransforms.get(taskIndex).visible; |
| if (willBeInvisible) { |
| if (taskIndex < 0) { |
| toTransform = curTaskTransforms.get(curTasks.indexOf(task)); |
| } else { |
| toTransform = new TaskViewTransform(taskTransforms.get(taskIndex)); |
| } |
| tv.prepareTaskTransformForFilterTaskVisible(toTransform); |
| childrenToRemoveOut.add(tv); |
| } else { |
| toTransform = taskTransforms.get(taskIndex); |
| // Use the movement of the visible views to calculate the duration of the animation |
| movement = Math.max(movement, Math.abs(toTransform.translationY - |
| (int) tv.getTranslationY())); |
| } |
| |
| toTransform.startDelay = offset * Constants.Values.TaskStackView.FilterStartDelay; |
| childViewTransformsOut.put(tv, toTransform); |
| offset++; |
| } |
| return mConfig.filteringCurrentViewsAnimDuration; |
| } |
| |
| } |