packages/SystemUI/src/com/android/systemui/qs/customize/TileAdapter.java - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2016 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.qs.customize;

 import android.content.Context;
 import android.graphics.Canvas;
 import android.graphics.drawable.ColorDrawable;
 import android.support.v4.view.ViewCompat;
 import android.support.v7.widget.GridLayoutManager.SpanSizeLookup;
 import android.support.v7.widget.RecyclerView;
 import android.support.v7.widget.RecyclerView.ItemDecoration;
 import android.support.v7.widget.RecyclerView.State;
 import android.support.v7.widget.RecyclerView.ViewHolder;
 import android.support.v7.widget.helper.ItemTouchHelper;
 import android.view.LayoutInflater;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnTouchListener;
 import android.view.ViewGroup;
 import android.widget.FrameLayout;
 import com.android.systemui.R;
 import com.android.systemui.qs.QSIconView;
 import com.android.systemui.qs.QSTileView;
 import com.android.systemui.qs.customize.TileAdapter.Holder;
 import com.android.systemui.qs.customize.TileQueryHelper.TileInfo;
 import com.android.systemui.qs.customize.TileQueryHelper.TileStateListener;
 import com.android.systemui.statusbar.phone.QSTileHost;

 import java.util.ArrayList;
 import java.util.List;

 public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileStateListener {

     private static final long DRAG_LENGTH = 100;
     private static final float DRAG_SCALE = 1.2f;
     public static final long MOVE_DURATION = 150;

     private static final int TYPE_TILE = 0;
     private static final int TYPE_EDIT = 1;

     private final Context mContext;

     private final List<TileInfo> mTiles = new ArrayList<>();
     private final ItemTouchHelper mItemTouchHelper;
     private int mDividerIndex;
     private List<String> mCurrentSpecs;
     private List<TileInfo> mOtherTiles;
     private List<TileInfo> mAllTiles;

     private Holder mCurrentDrag;

     public TileAdapter(Context context) {
         mContext = context;
         mItemTouchHelper = new ItemTouchHelper(mCallbacks);
         setHasStableIds(true);
     }

     @Override
     public long getItemId(int position) {
         return mTiles.get(position) != null ? mAllTiles.indexOf(mTiles.get(position)) : -1;
     }

     public ItemTouchHelper getItemTouchHelper() {
         return mItemTouchHelper;
     }

     public ItemDecoration getItemDecoration() {
         return mDecoration;
     }

     public void saveSpecs(QSTileHost host) {
         List<String> newSpecs = new ArrayList<>();
         for (int i = 0; mTiles.get(i) != null; i++) {
             newSpecs.add(mTiles.get(i).spec);
         }
         host.changeTiles(mCurrentSpecs, newSpecs);
         setTileSpecs(newSpecs);
     }

     public void setTileSpecs(List<String> currentSpecs) {
         mCurrentSpecs = currentSpecs;
         recalcSpecs();
     }

     @Override
     public void onTilesChanged(List<TileInfo> tiles) {
         mAllTiles = tiles;
         recalcSpecs();
     }

     private void recalcSpecs() {
         if (mCurrentSpecs == null || mAllTiles == null) {
             return;
         }
         mOtherTiles = new ArrayList<TileInfo>(mAllTiles);
         mTiles.clear();
         for (int i = 0; i < mCurrentSpecs.size(); i++) {
             mTiles.add(getAndRemoveOther(mCurrentSpecs.get(i)));
         }
         mTiles.add(null);
         mTiles.addAll(mOtherTiles);
         mDividerIndex = mTiles.indexOf(null);
         notifyDataSetChanged();
     }

     private TileInfo getAndRemoveOther(String s) {
         for (int i = 0; i < mOtherTiles.size(); i++) {
             if (mOtherTiles.get(i).spec.equals(s)) {
                 return mOtherTiles.remove(i);
             }
         }
         return null;
     }

     @Override
     public int getItemViewType(int position) {
         if (mTiles.get(position) == null) {
             return TYPE_EDIT;
         }
         return TYPE_TILE;
     }

     @Override
     public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
         final Context context = parent.getContext();
         LayoutInflater inflater = LayoutInflater.from(context);
         if (viewType == 1) {
             return new Holder(inflater.inflate(R.layout.qs_customize_divider, parent, false));
         }
         FrameLayout frame = (FrameLayout) inflater.inflate(R.layout.qs_customize_tile_frame, parent,
                 false);
         frame.addView(new QSTileView(context, new QSIconView(context)));
         return new Holder(frame);
     }

     @Override
     public int getItemCount() {
         return mTiles.size();
     }

     @Override
     public void onBindViewHolder(final Holder holder, int position) {
         if (holder.getItemViewType() == TYPE_EDIT) return;

         TileInfo info = mTiles.get(position);
         holder.mTileView.onStateChanged(info.state);
         holder.mTileView.setOnTouchListener(new OnTouchListener() {
             @Override
             public boolean onTouch(View v, MotionEvent event) {
                 mItemTouchHelper.startDrag(holder);
                 return true;
             }
         });
     }

     public SpanSizeLookup getSizeLookup() {
         return mSizeLookup;
     }

     public class Holder extends ViewHolder {
         private QSTileView mTileView;

         public Holder(View itemView) {
             super(itemView);
             if (itemView instanceof FrameLayout) {
                 mTileView = (QSTileView) ((FrameLayout) itemView).getChildAt(0);
             }
         }

         public void startDrag() {
             itemView.animate()
                     .setDuration(DRAG_LENGTH)
                     .scaleX(DRAG_SCALE)
                     .scaleY(DRAG_SCALE);
             mTileView.findViewById(R.id.tile_label).animate()
                     .setDuration(DRAG_LENGTH)
                     .alpha(0);
         }

         public void stopDrag() {
             itemView.animate()
                     .setDuration(DRAG_LENGTH)
                     .scaleX(1)
                     .scaleY(1);
             mTileView.findViewById(R.id.tile_label).animate()
                     .setDuration(DRAG_LENGTH)
                     .alpha(1);
         }
     }

     private final SpanSizeLookup mSizeLookup = new SpanSizeLookup() {
         @Override
         public int getSpanSize(int position) {
             return getItemViewType(position) == TYPE_EDIT ? 3 : 1;
         }
     };

     private final ItemDecoration mDecoration = new ItemDecoration() {
         // TODO: Move this to resource.
         private final ColorDrawable mDrawable = new ColorDrawable(0xff384248);

         @Override
         public void onDraw(Canvas c, RecyclerView parent, State state) {
             super.onDraw(c, parent, state);

             final int childCount = parent.getChildCount();
             final int width = parent.getWidth();
             final int bottom = parent.getBottom();
             for (int i = 0; i < childCount; i++) {
                 final View child = parent.getChildAt(i);
                 final ViewHolder holder = parent.getChildViewHolder(child);
                 if (holder.getAdapterPosition() < mDividerIndex) {
                     continue;
                 }

                 final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
                         .getLayoutParams();
                 final int top = child.getTop() + params.topMargin +
                         Math.round(ViewCompat.getTranslationY(child));
                 // Draw full width, in case there aren't tiles all the way across.
                 mDrawable.setBounds(0, top, width, bottom);
                 mDrawable.draw(c);
                 break;
             }
         }
     };

     private final ItemTouchHelper.Callback mCallbacks = new ItemTouchHelper.Callback() {

         @Override
         public boolean isLongPressDragEnabled() {
             return true;
         }

         @Override
         public boolean isItemViewSwipeEnabled() {
             return false;
         }

         @Override
         public void onSelectedChanged(ViewHolder viewHolder, int actionState) {
             super.onSelectedChanged(viewHolder, actionState);
             if (mCurrentDrag != null) {
                 mCurrentDrag.stopDrag();
             }
             if (viewHolder != null) {
                 mCurrentDrag = (Holder) viewHolder;
                 mCurrentDrag.startDrag();
             }
         }

         @Override
         public int getMovementFlags(RecyclerView recyclerView, ViewHolder viewHolder) {
             if (viewHolder.getItemViewType() == TYPE_EDIT) {
                 return makeMovementFlags(0, 0);
             }
             int dragFlags = ItemTouchHelper.UP | ItemTouchHelper.DOWN | ItemTouchHelper.RIGHT
                     | ItemTouchHelper.LEFT;
             return makeMovementFlags(dragFlags, 0);
         }

         @Override
         public boolean onMove(RecyclerView recyclerView, ViewHolder viewHolder, ViewHolder target) {
             int from = viewHolder.getAdapterPosition();
             int to = target.getAdapterPosition();
             if (to > mDividerIndex) {
                 if (from >= mDividerIndex) {
                     return false;
                 }
             }
             if (target.getItemViewType() == TYPE_EDIT && from < mDividerIndex) {
                 to++;
             }
             move(from, to, mTiles);
             mDividerIndex = mTiles.indexOf(null);
             notifyItemMoved(from, to);
             return true;
         }

         private <T> void move(int from, int to, List<T> list) {
             list.add(from > to ? to : to + 1, list.get(from));
             list.remove(from > to ? from + 1 : from);
         }

         @Override
         public void onSwiped(ViewHolder viewHolder, int direction) {
         }
     };
 }
	/*
	* Copyright (C) 2016 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.qs.customize;

	import android.content.Context;
	import android.graphics.Canvas;
	import android.graphics.drawable.ColorDrawable;
	import android.support.v4.view.ViewCompat;
	import android.support.v7.widget.GridLayoutManager.SpanSizeLookup;
	import android.support.v7.widget.RecyclerView;
	import android.support.v7.widget.RecyclerView.ItemDecoration;
	import android.support.v7.widget.RecyclerView.State;
	import android.support.v7.widget.RecyclerView.ViewHolder;
	import android.support.v7.widget.helper.ItemTouchHelper;
	import android.view.LayoutInflater;
	import android.view.MotionEvent;
	import android.view.View;
	import android.view.View.OnTouchListener;
	import android.view.ViewGroup;
	import android.widget.FrameLayout;
	import com.android.systemui.R;
	import com.android.systemui.qs.QSIconView;
	import com.android.systemui.qs.QSTileView;
	import com.android.systemui.qs.customize.TileAdapter.Holder;
	import com.android.systemui.qs.customize.TileQueryHelper.TileInfo;
	import com.android.systemui.qs.customize.TileQueryHelper.TileStateListener;
	import com.android.systemui.statusbar.phone.QSTileHost;

	import java.util.ArrayList;
	import java.util.List;

	public class TileAdapter extends RecyclerView.Adapter<Holder> implements TileStateListener {

	private static final long DRAG_LENGTH = 100;
	private static final float DRAG_SCALE = 1.2f;
	public static final long MOVE_DURATION = 150;

	private static final int TYPE_TILE = 0;
	private static final int TYPE_EDIT = 1;

	private final Context mContext;

	private final List<TileInfo> mTiles = new ArrayList<>();
	private final ItemTouchHelper mItemTouchHelper;
	private int mDividerIndex;
	private List<String> mCurrentSpecs;
	private List<TileInfo> mOtherTiles;
	private List<TileInfo> mAllTiles;

	private Holder mCurrentDrag;

	public TileAdapter(Context context) {
	mContext = context;
	mItemTouchHelper = new ItemTouchHelper(mCallbacks);
	setHasStableIds(true);
	}

	@Override
	public long getItemId(int position) {
	return mTiles.get(position) != null ? mAllTiles.indexOf(mTiles.get(position)) : -1;
	}

	public ItemTouchHelper getItemTouchHelper() {
	return mItemTouchHelper;
	}

	public ItemDecoration getItemDecoration() {
	return mDecoration;
	}

	public void saveSpecs(QSTileHost host) {
	List<String> newSpecs = new ArrayList<>();
	for (int i = 0; mTiles.get(i) != null; i++) {
	newSpecs.add(mTiles.get(i).spec);
	}
	host.changeTiles(mCurrentSpecs, newSpecs);
	setTileSpecs(newSpecs);
	}

	public void setTileSpecs(List<String> currentSpecs) {
	mCurrentSpecs = currentSpecs;
	recalcSpecs();
	}

	@Override
	public void onTilesChanged(List<TileInfo> tiles) {
	mAllTiles = tiles;
	recalcSpecs();
	}

	private void recalcSpecs() {
	if (mCurrentSpecs == null \|\| mAllTiles == null) {
	return;
	}
	mOtherTiles = new ArrayList<TileInfo>(mAllTiles);
	mTiles.clear();
	for (int i = 0; i < mCurrentSpecs.size(); i++) {
	mTiles.add(getAndRemoveOther(mCurrentSpecs.get(i)));
	}
	mTiles.add(null);
	mTiles.addAll(mOtherTiles);
	mDividerIndex = mTiles.indexOf(null);
	notifyDataSetChanged();
	}

	private TileInfo getAndRemoveOther(String s) {
	for (int i = 0; i < mOtherTiles.size(); i++) {
	if (mOtherTiles.get(i).spec.equals(s)) {
	return mOtherTiles.remove(i);
	}
	}
	return null;
	}

	@Override
	public int getItemViewType(int position) {
	if (mTiles.get(position) == null) {
	return TYPE_EDIT;
	}
	return TYPE_TILE;
	}

	@Override
	public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
	final Context context = parent.getContext();
	LayoutInflater inflater = LayoutInflater.from(context);
	if (viewType == 1) {
	return new Holder(inflater.inflate(R.layout.qs_customize_divider, parent, false));
	}
	FrameLayout frame = (FrameLayout) inflater.inflate(R.layout.qs_customize_tile_frame, parent,
	false);
	frame.addView(new QSTileView(context, new QSIconView(context)));
	return new Holder(frame);
	}

	@Override
	public int getItemCount() {
	return mTiles.size();
	}

	@Override
	public void onBindViewHolder(final Holder holder, int position) {
	if (holder.getItemViewType() == TYPE_EDIT) return;

	TileInfo info = mTiles.get(position);
	holder.mTileView.onStateChanged(info.state);
	holder.mTileView.setOnTouchListener(new OnTouchListener() {
	@Override
	public boolean onTouch(View v, MotionEvent event) {
	mItemTouchHelper.startDrag(holder);
	return true;
	}
	});
	}

	public SpanSizeLookup getSizeLookup() {
	return mSizeLookup;
	}

	public class Holder extends ViewHolder {
	private QSTileView mTileView;

	public Holder(View itemView) {
	super(itemView);
	if (itemView instanceof FrameLayout) {
	mTileView = (QSTileView) ((FrameLayout) itemView).getChildAt(0);
	}
	}

	public void startDrag() {
	itemView.animate()
	.setDuration(DRAG_LENGTH)
	.scaleX(DRAG_SCALE)
	.scaleY(DRAG_SCALE);
	mTileView.findViewById(R.id.tile_label).animate()
	.setDuration(DRAG_LENGTH)
	.alpha(0);
	}

	public void stopDrag() {
	itemView.animate()
	.setDuration(DRAG_LENGTH)
	.scaleX(1)
	.scaleY(1);
	mTileView.findViewById(R.id.tile_label).animate()
	.setDuration(DRAG_LENGTH)
	.alpha(1);
	}
	}

	private final SpanSizeLookup mSizeLookup = new SpanSizeLookup() {
	@Override
	public int getSpanSize(int position) {
	return getItemViewType(position) == TYPE_EDIT ? 3 : 1;
	}
	};

	private final ItemDecoration mDecoration = new ItemDecoration() {
	// TODO: Move this to resource.
	private final ColorDrawable mDrawable = new ColorDrawable(0xff384248);

	@Override
	public void onDraw(Canvas c, RecyclerView parent, State state) {
	super.onDraw(c, parent, state);

	final int childCount = parent.getChildCount();
	final int width = parent.getWidth();
	final int bottom = parent.getBottom();
	for (int i = 0; i < childCount; i++) {
	final View child = parent.getChildAt(i);
	final ViewHolder holder = parent.getChildViewHolder(child);
	if (holder.getAdapterPosition() < mDividerIndex) {
	continue;
	}

	final RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) child
	.getLayoutParams();
	final int top = child.getTop() + params.topMargin +
	Math.round(ViewCompat.getTranslationY(child));
	// Draw full width, in case there aren't tiles all the way across.
	mDrawable.setBounds(0, top, width, bottom);
	mDrawable.draw(c);
	break;
	}
	}
	};

	private final ItemTouchHelper.Callback mCallbacks = new ItemTouchHelper.Callback() {

	@Override
	public boolean isLongPressDragEnabled() {
	return true;
	}

	@Override
	public boolean isItemViewSwipeEnabled() {
	return false;
	}

	@Override
	public void onSelectedChanged(ViewHolder viewHolder, int actionState) {
	super.onSelectedChanged(viewHolder, actionState);
	if (mCurrentDrag != null) {
	mCurrentDrag.stopDrag();
	}
	if (viewHolder != null) {
	mCurrentDrag = (Holder) viewHolder;
	mCurrentDrag.startDrag();
	}
	}

	@Override
	public int getMovementFlags(RecyclerView recyclerView, ViewHolder viewHolder) {
	if (viewHolder.getItemViewType() == TYPE_EDIT) {
	return makeMovementFlags(0, 0);
	}
	int dragFlags = ItemTouchHelper.UP \| ItemTouchHelper.DOWN \| ItemTouchHelper.RIGHT
	\| ItemTouchHelper.LEFT;
	return makeMovementFlags(dragFlags, 0);
	}

	@Override
	public boolean onMove(RecyclerView recyclerView, ViewHolder viewHolder, ViewHolder target) {
	int from = viewHolder.getAdapterPosition();
	int to = target.getAdapterPosition();
	if (to > mDividerIndex) {
	if (from >= mDividerIndex) {
	return false;
	}
	}
	if (target.getItemViewType() == TYPE_EDIT && from < mDividerIndex) {
	to++;
	}
	move(from, to, mTiles);
	mDividerIndex = mTiles.indexOf(null);
	notifyItemMoved(from, to);
	return true;
	}

	private <T> void move(int from, int to, List<T> list) {
	list.add(from > to ? to : to + 1, list.get(from));
	list.remove(from > to ? from + 1 : from);
	}

	@Override
	public void onSwiped(ViewHolder viewHolder, int direction) {
	}
	};
	}