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/*
* 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.tv.ui;
import android.app.Fragment;
import android.os.Bundle;
import android.os.Handler;
import android.support.v17.leanback.widget.VerticalGridView;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
import com.android.internal.util.Preconditions;
import com.android.tv.R;
public class BaseSideFragment extends Fragment {
private static final String TAG = "BaseSideFragment";
public static final String KEY_INITIATOR = "last_state";
public static final int INITIATOR_UNKNOWN = 0;
public static final int INITIATOR_SHORTCUT_KEY = 1;
public static final int INITIATOR_MENU = 2;
private String mTitle;
private TextView mTitleView;
private VerticalGridView mOptionItemListView;
private LayoutInflater mLayoutInflater;
private Object[] mItemTags;
private int mPrevSelectedItemPosition;
private int mFragmentLayoutId;
private int mItemLayoutId;
private int mInitiator;
private Handler mHandler = new Handler();
private int mItemBgColor;
private int mItemFocusedBgColor;
private int mItemHeight;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// initialize should be called before onCreateView.
Preconditions.checkState(!TextUtils.isEmpty(mTitle));
Bundle arg = getArguments();
if (arg != null && arg.containsKey(KEY_INITIATOR)) {
mInitiator = arg.getInt(KEY_INITIATOR);
} else {
mInitiator = INITIATOR_UNKNOWN;
}
View fragView = inflater.inflate(mFragmentLayoutId, container, false);
mTitleView = (TextView) fragView.findViewById(R.id.side_panel_title);
mTitleView.setText(mTitle);
mOptionItemListView = (VerticalGridView) fragView.findViewById(R.id.side_panel_list);
mOptionItemListView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
@Override
public void onLayoutChange(View v, int left, int top, int right, int bottom,
int oldLeft, int oldTop, int oldRight, int oldBottom) {
int padding = ((v.getHeight() + mItemHeight) / 2) % mItemHeight + mItemHeight;
v.setPadding(v.getPaddingLeft(), v.getPaddingTop(), v.getPaddingRight(), padding);
}
});
mOptionItemListView.setAdapter(new OptionItemAdapter());
mLayoutInflater = inflater;
return fragView;
}
public int getInitiator() {
return mInitiator;
}
public void notifyDataSetChanged() {
if (mOptionItemListView != null) {
mOptionItemListView.getAdapter().notifyDataSetChanged();
}
}
public void setPrevSelectedItemPosition(int position) {
mPrevSelectedItemPosition = position;
notifyDataSetChanged();
}
public void onItemFocusChanged(View v, boolean focusGained, int position, Object tag) {
v.setBackgroundColor(focusGained ? mItemFocusedBgColor : mItemBgColor);
}
public void onItemSelected(View v, int position, Object tag) {
}
public void onCreatedChildView(View v) {
}
public void onBindView(View v, int position, Object tag, boolean prevSelected) {
}
public void setSelectedPosition(int position) {
mOptionItemListView.setSelectedPosition(position);
mOptionItemListView.requestFocus();
}
protected void initialize(String title, Object[] itemTags, int fragmentLayoutId,
int itemLayoutId, int itemBgColorResId, int itemFocusedBgColorResId,
int itemHeightResId) {
Preconditions.checkState(!TextUtils.isEmpty(title));
mTitle = title;
mItemTags = itemTags;
mFragmentLayoutId = fragmentLayoutId;
mItemLayoutId = itemLayoutId;
mItemBgColor = getActivity().getResources().getColor(itemBgColorResId);
mItemFocusedBgColor = getActivity().getResources().getColor(itemFocusedBgColorResId);
mItemHeight = getActivity().getResources().getDimensionPixelOffset(itemHeightResId);
notifyDataSetChanged();
}
class OptionItemAdapter extends RecyclerView.Adapter<OptionItemAdapter.MyViewHolder> {
@Override
public MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = mLayoutInflater.inflate(mItemLayoutId, parent, false);
v.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int position = (Integer) v.getTag(R.id.TAG_OPTION_ITEM_POSITOIN);
onItemSelected(v, position, mItemTags[position]);
}
});
v.setOnFocusChangeListener(new View.OnFocusChangeListener() {
@Override
public void onFocusChange(View v, boolean focusGained) {
int position = (Integer) v.getTag(R.id.TAG_OPTION_ITEM_POSITOIN);
onItemFocusChanged(v, focusGained, position, mItemTags[position]);
}
});
onCreatedChildView(v);
return new MyViewHolder(v);
}
@Override
public void onBindViewHolder(MyViewHolder baseHolder, int position) {
View v = baseHolder.itemView;
v.setVisibility(View.VISIBLE);
onBindView(v, position, mItemTags[position], position == mPrevSelectedItemPosition);
v.setTag(R.id.TAG_OPTION_ITEM_POSITOIN, position);
if (v instanceof ViewGroup) {
final ViewGroup viewGroup = (ViewGroup) v;
mHandler.post(new Runnable() {
void requestLayout(ViewGroup v) {
for (int i = 0; i < v.getChildCount(); i++) {
v.getChildAt(i).requestLayout();
if (v.getChildAt(i) instanceof ViewGroup) {
requestLayout((ViewGroup) v.getChildAt(i));
}
}
}
@Override
public void run() {
requestLayout(viewGroup);
}
});
}
}
@Override
public int getItemCount() {
return mItemTags == null ? 0 : mItemTags.length;
}
private class MyViewHolder extends RecyclerView.ViewHolder {
MyViewHolder(View view) {
super(view);
}
}
}
}
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