src/com/owncloud/android/ui/preview/PreviewImageActivity.java

   1 /* ownCloud Android client application
   2  *   Copyright (C) 2012-2013  ownCloud Inc.
   3  *
   4  *   This program is free software: you can redistribute it and/or modify
   5  *   it under the terms of the GNU General Public License as published by
   6  *   the Free Software Foundation, either version 2 of the License, or
   7  *   (at your option) any later version.
   8  *
   9  *   This program is distributed in the hope that it will be useful,
  10  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *   GNU General Public License for more details.
  13  *
  14  *   You should have received a copy of the GNU General Public License
  15  *   along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  *
  17  */
  18 package com.owncloud.android.ui.preview;
  19
  20 import android.accounts.Account;
  21 import android.app.Dialog;
  22 import android.app.ProgressDialog;
  23 import android.content.ComponentName;
  24 import android.content.Context;
  25 import android.content.Intent;
  26 import android.content.ServiceConnection;
  27 import android.os.Bundle;
  28 import android.os.IBinder;
  29 import android.support.v4.view.ViewPager;
  30 import android.util.Log;
  31
  32 import com.actionbarsherlock.app.ActionBar;
  33 import com.actionbarsherlock.app.SherlockFragmentActivity;
  34 import com.actionbarsherlock.view.MenuItem;
  35 import com.owncloud.android.datamodel.DataStorageManager;
  36 import com.owncloud.android.datamodel.FileDataStorageManager;
  37 import com.owncloud.android.datamodel.OCFile;
  38 import com.owncloud.android.files.services.FileDownloader;
  39 import com.owncloud.android.files.services.FileDownloader.FileDownloaderBinder;
  40 import com.owncloud.android.files.services.FileUploader;
  41 import com.owncloud.android.files.services.FileUploader.FileUploaderBinder;
  42 import com.owncloud.android.ui.activity.FileDetailActivity;
  43 import com.owncloud.android.ui.fragment.FileDetailFragment;
  44 import com.owncloud.android.ui.fragment.FileFragment;
  45
  46 import com.owncloud.android.AccountUtils;
  47 import com.owncloud.android.R;
  48
  49 /**
  50  *  Used as an utility to preview image files contained in an ownCloud account.
  51  *
  52  *  @author David A. Velasco
  53  */
  54 public class PreviewImageActivity extends SherlockFragmentActivity implements FileFragment.ContainerActivity, ViewPager.OnPageChangeListener {
  55
  56     public static final int DIALOG_SHORT_WAIT = 0;
  57
  58     public static final String TAG = PreviewImageActivity.class.getSimpleName();
  59
  60     public static final String KEY_WAITING_TO_PREVIEW = "WAITING_TO_PREVIEW";
  61
  62     private OCFile mFile;
  63     private OCFile mParentFolder;
  64     private Account mAccount;
  65     private DataStorageManager mStorageManager;
  66
  67     private ViewPager mViewPager;
  68     private PreviewImagePagerAdapter mPreviewImagePagerAdapter;
  69
  70     private FileDownloaderBinder mDownloaderBinder = null;
  71     private ServiceConnection mDownloadConnection, mUploadConnection = null;
  72     private FileUploaderBinder mUploaderBinder = null;
  73     private OCFile mWaitingToPreview = null;
  74
  75
  76     @Override
  77     protected void onCreate(Bundle savedInstanceState) {
  78         super.onCreate(savedInstanceState);
  79
  80         mFile = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_FILE);
  81         mAccount = getIntent().getParcelableExtra(FileDetailFragment.EXTRA_ACCOUNT);
  82         if (mFile == null) {
  83             throw new IllegalStateException("Instanced with a NULL OCFile");
  84         }
  85         if (mAccount == null) {
  86             throw new IllegalStateException("Instanced with a NULL ownCloud Account");
  87         }
  88         if (!mFile.isImage()) {
  89             throw new IllegalArgumentException("Non-image file passed as argument");
  90         }
  91
  92         setContentView(R.layout.preview_image_activity);
  93
  94         ActionBar actionBar = getSupportActionBar();
  95         actionBar.setDisplayHomeAsUpEnabled(true);
  96         actionBar.setTitle(mFile.getFileName());
  97
  98         mStorageManager = new FileDataStorageManager(mAccount, getContentResolver());
  99         mParentFolder = mStorageManager.getFileById(mFile.getParentId());
 100         if (mParentFolder == null) {
 101             // should not be necessary
 102             mParentFolder = mStorageManager.getFileByPath(OCFile.PATH_SEPARATOR);
 103         }
 104
 105         createViewPager();
 106
 107         if (savedInstanceState == null) {
 108             mWaitingToPreview = (mFile.isDown())?null:mFile;
 109         } else {
 110             mWaitingToPreview = (OCFile) savedInstanceState.getParcelable(KEY_WAITING_TO_PREVIEW);
 111         }
 112
 113         mDownloadConnection = new PreviewImageServiceConnection();
 114         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 115         mUploadConnection = new PreviewImageServiceConnection();
 116         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 117
 118     }
 119
 120     private void createViewPager() {
 121         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 122         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 123         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 124         mViewPager.setOnPageChangeListener(this);
 125     }
 126
 127
 128     @Override
 129     protected void onSaveInstanceState(Bundle outState) {
 130         super.onSaveInstanceState(outState);
 131         outState.putParcelable(KEY_WAITING_TO_PREVIEW, mWaitingToPreview);
 132     }
 133
 134
 135     /** Defines callbacks for service binding, passed to bindService() */
 136     private class PreviewImageServiceConnection implements ServiceConnection {
 137
 138         @Override
 139         public void onServiceConnected(ComponentName component, IBinder service) {
 140
 141             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 142                 Log.d(TAG, "Download service connected");
 143                 mDownloaderBinder = (FileDownloaderBinder) service;
 144
 145             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 146                 Log.d(TAG, "Upload service connected");
 147                 mUploaderBinder = (FileUploaderBinder) service;
 148             } else {
 149                 return;
 150             }
 151
 152         }
 153
 154         @Override
 155         public void onServiceDisconnected(ComponentName component) {
 156             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 157                 Log.d(TAG, "Download service suddenly disconnected");
 158                 mDownloaderBinder = null;
 159             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 160                 Log.d(TAG, "Upload service suddenly disconnected");
 161                 mUploaderBinder = null;
 162             }
 163         }
 164     };
 165
 166
 167     @Override
 168     public void onDestroy() {
 169         super.onDestroy();
 170         if (mDownloadConnection != null) {
 171             unbindService(mDownloadConnection);
 172             mDownloadConnection = null;
 173         }
 174         if (mUploadConnection != null) {
 175             unbindService(mUploadConnection);
 176             mUploadConnection = null;
 177         }
 178     }
 179
 180
 181     @Override
 182     public boolean onOptionsItemSelected(MenuItem item) {
 183         boolean returnValue = false;
 184
 185         switch(item.getItemId()){
 186         case android.R.id.home:
 187             backToDisplayActivity();
 188             returnValue = true;
 189             break;
 190         default:
 191                 returnValue = super.onOptionsItemSelected(item);
 192         }
 193
 194         return returnValue;
 195     }
 196
 197
 198     @Override
 199     protected void onResume() {
 200         super.onResume();
 201     }
 202
 203
 204     private void backToDisplayActivity() {
 205         /*
 206         Intent intent = new Intent(this, FileDisplayActivity.class);
 207         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 208         intent.putExtra(FileDetailFragment.EXTRA_FILE, mFile);
 209         intent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, mAccount);
 210         startActivity(intent);
 211         */
 212         finish();
 213     }
 214
 215
 216     @Override
 217     protected Dialog onCreateDialog(int id) {
 218         Dialog dialog = null;
 219         switch (id) {
 220         case DIALOG_SHORT_WAIT: {
 221             ProgressDialog working_dialog = new ProgressDialog(this);
 222             working_dialog.setMessage(getResources().getString(
 223                     R.string.wait_a_moment));
 224             working_dialog.setIndeterminate(true);
 225             working_dialog.setCancelable(false);
 226             dialog = working_dialog;
 227             break;
 228         }
 229         default:
 230             dialog = null;
 231         }
 232         return dialog;
 233     }
 234
 235
 236     /**
 237      * {@inheritDoc}
 238      */
 239     @Override
 240     public void onFileStateChanged() {
 241         // nothing to do here!
 242     }
 243
 244
 245     /**
 246      * {@inheritDoc}
 247      */
 248     @Override
 249     public FileDownloaderBinder getFileDownloaderBinder() {
 250         return mDownloaderBinder;
 251     }
 252
 253
 254     @Override
 255     public FileUploaderBinder getFileUploaderBinder() {
 256         return mUploaderBinder;
 257     }
 258
 259
 260     @Override
 261     public void showFragmentWithDetails(OCFile file) {
 262         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 263         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, file);
 264         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 265         showDetailsIntent.putExtra(FileDetailActivity.EXTRA_MODE, FileDetailActivity.MODE_DETAILS);
 266         startActivity(showDetailsIntent);
 267     }
 268
 269
 270     private void requestForDownload() {
 271         Log.e(TAG, "REQUEST FOR DOWNLOAD : " + mWaitingToPreview.getFileName());
 272         if (!mDownloaderBinder.isDownloading(mAccount, mWaitingToPreview)) {
 273             Intent i = new Intent(this, FileDownloader.class);
 274             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 275             i.putExtra(FileDownloader.EXTRA_FILE, mWaitingToPreview);
 276             startService(i);
 277         }
 278     }
 279
 280     @Override
 281     public void notifySuccessfulDownload(OCFile file, Intent intent, boolean success) {
 282         if (success) {
 283             if (mWaitingToPreview != null && mWaitingToPreview.equals(file)) {
 284                 mWaitingToPreview = null;
 285                 int position = mViewPager.getCurrentItem();
 286                 mPreviewImagePagerAdapter.updateFile(position, file);
 287                 Log.e(TAG, "BEFORE NOTIFY DATA SET CHANGED");
 288                 mPreviewImagePagerAdapter.notifyDataSetChanged();
 289                 Log.e(TAG, "AFTER NOTIFY DATA SET CHANGED");
 290                 //Log.e(TAG, "BEFORE INVALIDATE");
 291                 //mViewPager.postInvalidate();
 292                 //Log.e(TAG, "AFTER INVALIDATE");
 293             }
 294         }
 295     }
 296
 297
 298     /**
 299      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 300      *
 301      *  @param  Position        Position index of the new selected page
 302      */
 303     @Override
 304     public void onPageSelected(int position) {
 305         OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 306         getSupportActionBar().setTitle(currentFile.getFileName());
 307         if (currentFile.isDown()) {
 308             mWaitingToPreview = null;
 309         } else {
 310             mWaitingToPreview = currentFile;
 311             requestForDownload();
 312             mViewPager.invalidate();
 313         }
 314     }
 315
 316     /**
 317      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 318      * when the pager is automatically settling to the current page, or when it is fully stopped/idle.
 319      *
 320      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 321      */
 322     @Override
 323     public void onPageScrollStateChanged(int state) {
 324     }
 325
 326     /**
 327      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 328      * initiated smooth scroll or a user initiated touch scroll.
 329      *
 330      * @param   position                Position index of the first page currently being displayed.
 331      *                                  Page position+1 will be visible if positionOffset is nonzero.
 332      *
 333      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 334      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 335      */
 336     @Override
 337     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 338     }
 339
 340 }