1/*
2 * Copyright (C) 2013 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.android.photos;
18
19import android.app.ActionBar;
20import android.app.ActionBar.Tab;
21import android.app.Activity;
22import android.app.Fragment;
23import android.app.FragmentTransaction;
24import android.content.Intent;
25import android.os.Bundle;
26import android.support.v13.app.FragmentPagerAdapter;
27import android.support.v4.view.ViewPager;
28import android.view.Menu;
29import android.view.MenuItem;
30import android.view.ViewGroup;
31
32import com.android.gallery3d.R;
33
34import java.util.ArrayList;
35
36public class GalleryActivity extends Activity implements MultiChoiceManager.Provider {
37
38    private MultiChoiceManager mMultiChoiceManager;
39    private ViewPager mViewPager;
40    private TabsAdapter mTabsAdapter;
41
42    @Override
43    protected void onCreate(Bundle savedInstanceState) {
44        super.onCreate(savedInstanceState);
45        mMultiChoiceManager = new MultiChoiceManager(this);
46        mViewPager = new ViewPager(this);
47        mViewPager.setId(R.id.viewpager);
48        setContentView(mViewPager);
49
50        ActionBar ab = getActionBar();
51        ab.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
52        ab.setDisplayShowHomeEnabled(false);
53        ab.setDisplayShowTitleEnabled(false);
54
55        mTabsAdapter = new TabsAdapter(this, mViewPager);
56        mTabsAdapter.addTab(ab.newTab().setText(R.string.tab_photos),
57                PhotoSetFragment.class, null);
58        mTabsAdapter.addTab(ab.newTab().setText(R.string.tab_albums),
59                AlbumSetFragment.class, null);
60
61        if (savedInstanceState != null) {
62            ab.setSelectedNavigationItem(savedInstanceState.getInt("tab", 0));
63        }
64    }
65
66    @Override
67    protected void onSaveInstanceState(Bundle outState) {
68        super.onSaveInstanceState(outState);
69        outState.putInt("tab", getActionBar().getSelectedNavigationIndex());
70    }
71
72    @Override
73    public boolean onCreateOptionsMenu(Menu menu) {
74        getMenuInflater().inflate(R.menu.gallery, menu);
75        return true;
76    }
77
78    @Override
79    public boolean onOptionsItemSelected(MenuItem item) {
80        switch (item.getItemId()) {
81        case R.id.menu_camera:
82            // TODO: Call the correct Camera intent.
83            throw new RuntimeException("Not implemented yet.");
84//            Intent intent = new Intent(this, CameraActivity.class);
85//            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
86//            startActivity(intent);
87//            return true;
88        default:
89            return super.onOptionsItemSelected(item);
90        }
91    }
92
93    public static class TabsAdapter extends FragmentPagerAdapter implements
94            ActionBar.TabListener, ViewPager.OnPageChangeListener {
95
96        private final GalleryActivity mActivity;
97        private final ActionBar mActionBar;
98        private final ViewPager mViewPager;
99        private final ArrayList<TabInfo> mTabs = new ArrayList<TabInfo>();
100
101        static final class TabInfo {
102
103            private final Class<?> clss;
104            private final Bundle args;
105
106            TabInfo(Class<?> _class, Bundle _args) {
107                clss = _class;
108                args = _args;
109            }
110        }
111
112        public TabsAdapter(GalleryActivity activity, ViewPager pager) {
113            super(activity.getFragmentManager());
114            mActivity = activity;
115            mActionBar = activity.getActionBar();
116            mViewPager = pager;
117            mViewPager.setAdapter(this);
118            mViewPager.setOnPageChangeListener(this);
119        }
120
121        public void addTab(ActionBar.Tab tab, Class<?> clss, Bundle args) {
122            TabInfo info = new TabInfo(clss, args);
123            tab.setTag(info);
124            tab.setTabListener(this);
125            mTabs.add(info);
126            mActionBar.addTab(tab);
127            notifyDataSetChanged();
128        }
129
130        @Override
131        public int getCount() {
132            return mTabs.size();
133        }
134
135        @Override
136        public Fragment getItem(int position) {
137            TabInfo info = mTabs.get(position);
138            return Fragment.instantiate(mActivity, info.clss.getName(),
139                    info.args);
140        }
141
142        @Override
143        public void onPageScrolled(int position, float positionOffset,
144                int positionOffsetPixels) {
145        }
146
147        @Override
148        public void onPageSelected(int position) {
149            mActionBar.setSelectedNavigationItem(position);
150        }
151
152        @Override
153        public void setPrimaryItem(ViewGroup container, int position, Object object) {
154            super.setPrimaryItem(container, position, object);
155            mActivity.mMultiChoiceManager.setDelegate((MultiChoiceManager.Delegate) object);
156        }
157
158        @Override
159        public void onPageScrollStateChanged(int state) {
160        }
161
162        @Override
163        public void onTabSelected(Tab tab, FragmentTransaction ft) {
164            Object tag = tab.getTag();
165            for (int i = 0; i < mTabs.size(); i++) {
166                if (mTabs.get(i) == tag) {
167                    mViewPager.setCurrentItem(i);
168                }
169            }
170        }
171
172        @Override
173        public void onTabUnselected(Tab tab, FragmentTransaction ft) {
174        }
175
176        @Override
177        public void onTabReselected(Tab tab, FragmentTransaction ft) {
178        }
179    }
180
181    @Override
182    public MultiChoiceManager getMultiChoiceManager() {
183        return mMultiChoiceManager;
184    }
185}
186