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/*
* Copyright (C) 2019 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.quickstep;
import static androidx.recyclerview.widget.ItemTouchHelper.RIGHT;
import static com.android.quickstep.TaskAdapter.ITEM_TYPE_CLEAR_ALL;
import android.graphics.Canvas;
import androidx.annotation.NonNull;
import androidx.recyclerview.widget.ItemTouchHelper;
import androidx.recyclerview.widget.RecyclerView;
import androidx.recyclerview.widget.RecyclerView.ViewHolder;
import java.util.function.Consumer;
/**
* Callback for swipe input on {@link TaskHolder} views in the recents view.
*/
public final class TaskSwipeCallback extends ItemTouchHelper.SimpleCallback {
private final Consumer<TaskHolder> mOnTaskSwipeCallback;
public TaskSwipeCallback(Consumer<TaskHolder> onTaskSwipeCallback) {
super(0 /* dragDirs */, RIGHT);
mOnTaskSwipeCallback = onTaskSwipeCallback;
}
@Override
public boolean onMove(RecyclerView recyclerView, ViewHolder viewHolder,
ViewHolder target) {
return false;
}
@Override
public void onSwiped(ViewHolder viewHolder, int direction) {
if (direction == RIGHT) {
mOnTaskSwipeCallback.accept((TaskHolder) viewHolder);
}
}
@Override
public void onChildDraw(@NonNull Canvas c, @NonNull RecyclerView recyclerView,
@NonNull ViewHolder viewHolder, float dX, float dY, int actionState,
boolean isCurrentlyActive) {
if (actionState == ItemTouchHelper.ACTION_STATE_SWIPE) {
float alpha = 1.0f - dX / (float) viewHolder.itemView.getWidth();
viewHolder.itemView.setAlpha(alpha);
}
super.onChildDraw(c, recyclerView, viewHolder, dX, dY,
actionState, isCurrentlyActive);
}
@Override
public int getSwipeDirs(@NonNull RecyclerView recyclerView,
@NonNull ViewHolder viewHolder) {
if (viewHolder.getItemViewType() == ITEM_TYPE_CLEAR_ALL) {
// Clear all button should not be swipable.
return 0;
}
return super.getSwipeDirs(recyclerView, viewHolder);
}
}
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