1/*
2 * Copyright (C) 2015 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
17package com.example.android.supportv7.widget.touch;
18
19import android.view.MotionEvent;
20import android.view.View;
21import android.view.ViewGroup;
22
23import androidx.core.content.ContextCompat;
24import androidx.recyclerview.widget.ItemTouchHelper;
25import androidx.recyclerview.widget.RecyclerView;
26
27import com.example.android.supportv7.R;
28import com.example.android.supportv7.widget.util.ConfigToggle;
29
30public class DragAndDropActivity extends ItemTouchHelperActivity {
31
32    boolean mDragUpEnabled = true;
33    boolean mDragDownEnabled = true;
34    boolean mLongPressDragEnabled = true;
35
36    @Override
37    ConfigToggle[] createConfigToggles() {
38        return new ConfigToggle[]{
39                new ConfigToggle(this, R.string.drag_up) {
40                    @Override
41                    public boolean isChecked() {
42                        return mDragUpEnabled;
43                    }
44
45                    @Override
46                    public void onChange(boolean newValue) {
47                        mDragUpEnabled = newValue;
48                    }
49                },
50                new ConfigToggle(this, R.string.drag_down) {
51                    @Override
52                    public boolean isChecked() {
53                        return mDragDownEnabled;
54                    }
55
56                    @Override
57                    public void onChange(boolean newValue) {
58                        mDragDownEnabled = newValue;
59                    }
60                },
61                new ConfigToggle(this, R.string.long_press_drag) {
62                    @Override
63                    public boolean isChecked() {
64                        return mLongPressDragEnabled;
65                    }
66
67                    @Override
68                    public void onChange(boolean newValue) {
69                        mLongPressDragEnabled = newValue;
70                        mAdapter.notifyDataSetChanged();
71                    }
72                }
73        };
74    }
75
76    @Override
77    public boolean isLongPressDragEnabled() {
78        return mLongPressDragEnabled;
79    }
80
81    @Override
82    public void onBind(ItemTouchViewHolder viewHolder) {
83        super.onBind(viewHolder);
84        viewHolder.actionButton.setVisibility(mLongPressDragEnabled ? View.GONE : View.VISIBLE);
85    }
86
87    @Override
88    public void clearView(RecyclerView.ViewHolder viewHolder) {
89        super.clearView(viewHolder);
90        ItemTouchViewHolder touchVH = (ItemTouchViewHolder) viewHolder;
91        touchVH.cardView.setCardBackgroundColor(
92                ContextCompat.getColor(this, android.R.color.white));
93        touchVH.overlay.setVisibility(View.GONE);
94    }
95
96    @Override
97    public void onSelectedChanged(RecyclerView.ViewHolder viewHolder, int actionState) {
98        ItemTouchViewHolder touchVH = (ItemTouchViewHolder) viewHolder;
99        if (actionState != ItemTouchHelper.ACTION_STATE_IDLE) {
100            touchVH.cardView.setCardBackgroundColor(
101                    ContextCompat.getColor(this, R.color.card_aquatic));
102        }
103        super.onSelectedChanged(viewHolder, actionState);
104    }
105
106    @Override
107    public ItemTouchViewHolder onCreateViewHolder(ViewGroup parent) {
108        final ItemTouchViewHolder vh = super.onCreateViewHolder(parent);
109        vh.actionButton.setText(R.string.drag);
110        vh.actionButton.setOnTouchListener(new View.OnTouchListener() {
111            @Override
112            public boolean onTouch(View v, MotionEvent event) {
113                if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
114                    mItemTouchHelper.startDrag(vh);
115                }
116                return false;
117            }
118        });
119        return vh;
120    }
121
122    @Override
123    public int getMovementFlags(RecyclerView recyclerView, RecyclerView.ViewHolder viewHolder) {
124        return mCallback.makeMovementFlags(
125                (mDragUpEnabled ? ItemTouchHelper.UP : 0) |
126                        (mDragDownEnabled ? ItemTouchHelper.DOWN : 0), 0);
127    }
128}
129