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         mWaitingToPreview = null;
 106         if (savedInstanceState != null) {
 107             mWaitingToPreview = (OCFile) savedInstanceState.getParcelable(KEY_WAITING_TO_PREVIEW);
 108         }
 109
 110         createViewPager();
 111
 112         mDownloadConnection = new PreviewImageServiceConnection();
 113         bindService(new Intent(this, FileDownloader.class), mDownloadConnection, Context.BIND_AUTO_CREATE);
 114         mUploadConnection = new PreviewImageServiceConnection();
 115         bindService(new Intent(this, FileUploader.class), mUploadConnection, Context.BIND_AUTO_CREATE);
 116
 117     }
 118
 119     private void createViewPager() {
 120         mPreviewImagePagerAdapter = new PreviewImagePagerAdapter(getSupportFragmentManager(), mParentFolder, mAccount, mStorageManager);
 121         mViewPager = (ViewPager) findViewById(R.id.fragmentPager);
 122         int position = mPreviewImagePagerAdapter.getFilePosition(mFile);
 123         Log.e(TAG, "Setting initial position " + position);
 124         mViewPager.setAdapter(mPreviewImagePagerAdapter);
 125         mViewPager.setOnPageChangeListener(this);
 126         mViewPager.setCurrentItem((position >= 0) ? position : 0);
 127     }
 128
 129
 130     @Override
 131     protected void onSaveInstanceState(Bundle outState) {
 132         super.onSaveInstanceState(outState);
 133         outState.putParcelable(KEY_WAITING_TO_PREVIEW, mWaitingToPreview);
 134     }
 135
 136
 137     /** Defines callbacks for service binding, passed to bindService() */
 138     private class PreviewImageServiceConnection implements ServiceConnection {
 139
 140         @Override
 141         public void onServiceConnected(ComponentName component, IBinder service) {
 142
 143             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 144                 Log.d(TAG, "Download service connected");
 145                 mDownloaderBinder = (FileDownloaderBinder) service;
 146
 147             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 148                 Log.d(TAG, "Upload service connected");
 149                 mUploaderBinder = (FileUploaderBinder) service;
 150             } else {
 151                 return;
 152             }
 153
 154         }
 155
 156         @Override
 157         public void onServiceDisconnected(ComponentName component) {
 158             if (component.equals(new ComponentName(PreviewImageActivity.this, FileDownloader.class))) {
 159                 Log.d(TAG, "Download service suddenly disconnected");
 160                 mDownloaderBinder = null;
 161             } else if (component.equals(new ComponentName(PreviewImageActivity.this, FileUploader.class))) {
 162                 Log.d(TAG, "Upload service suddenly disconnected");
 163                 mUploaderBinder = null;
 164             }
 165         }
 166     };
 167
 168
 169     @Override
 170     public void onDestroy() {
 171         super.onDestroy();
 172         if (mDownloadConnection != null) {
 173             unbindService(mDownloadConnection);
 174             mDownloadConnection = null;
 175         }
 176         if (mUploadConnection != null) {
 177             unbindService(mUploadConnection);
 178             mUploadConnection = null;
 179         }
 180     }
 181
 182
 183     @Override
 184     public boolean onOptionsItemSelected(MenuItem item) {
 185         boolean returnValue = false;
 186
 187         switch(item.getItemId()){
 188         case android.R.id.home:
 189             backToDisplayActivity();
 190             returnValue = true;
 191             break;
 192         default:
 193                 returnValue = super.onOptionsItemSelected(item);
 194         }
 195
 196         return returnValue;
 197     }
 198
 199
 200     @Override
 201     protected void onResume() {
 202         super.onResume();
 203     }
 204
 205
 206     private void backToDisplayActivity() {
 207         /*
 208         Intent intent = new Intent(this, FileDisplayActivity.class);
 209         intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
 210         intent.putExtra(FileDetailFragment.EXTRA_FILE, mFile);
 211         intent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, mAccount);
 212         startActivity(intent);
 213         */
 214         finish();
 215     }
 216
 217
 218     @Override
 219     protected Dialog onCreateDialog(int id) {
 220         Dialog dialog = null;
 221         switch (id) {
 222         case DIALOG_SHORT_WAIT: {
 223             ProgressDialog working_dialog = new ProgressDialog(this);
 224             working_dialog.setMessage(getResources().getString(
 225                     R.string.wait_a_moment));
 226             working_dialog.setIndeterminate(true);
 227             working_dialog.setCancelable(false);
 228             dialog = working_dialog;
 229             break;
 230         }
 231         default:
 232             dialog = null;
 233         }
 234         return dialog;
 235     }
 236
 237
 238     /**
 239      * {@inheritDoc}
 240      */
 241     @Override
 242     public void onFileStateChanged() {
 243         // nothing to do here!
 244     }
 245
 246
 247     /**
 248      * {@inheritDoc}
 249      */
 250     @Override
 251     public FileDownloaderBinder getFileDownloaderBinder() {
 252         return mDownloaderBinder;
 253     }
 254
 255
 256     @Override
 257     public FileUploaderBinder getFileUploaderBinder() {
 258         return mUploaderBinder;
 259     }
 260
 261
 262     @Override
 263     public void showFragmentWithDetails(OCFile file) {
 264         Intent showDetailsIntent = new Intent(this, FileDetailActivity.class);
 265         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_FILE, file);
 266         showDetailsIntent.putExtra(FileDetailFragment.EXTRA_ACCOUNT, AccountUtils.getCurrentOwnCloudAccount(this));
 267         showDetailsIntent.putExtra(FileDetailActivity.EXTRA_MODE, FileDetailActivity.MODE_DETAILS);
 268         startActivity(showDetailsIntent);
 269     }
 270
 271
 272     private void requestForDownload() {
 273         Log.e(TAG, "REQUEST FOR DOWNLOAD : " + mWaitingToPreview.getFileName());
 274         if (!mDownloaderBinder.isDownloading(mAccount, mWaitingToPreview)) {
 275             Intent i = new Intent(this, FileDownloader.class);
 276             i.putExtra(FileDownloader.EXTRA_ACCOUNT, mAccount);
 277             i.putExtra(FileDownloader.EXTRA_FILE, mWaitingToPreview);
 278             startService(i);
 279         }
 280     }
 281
 282     @Override
 283     public void notifySuccessfulDownload(OCFile file, Intent intent, boolean success) {
 284         if (success) {
 285             if (mWaitingToPreview != null && mWaitingToPreview.equals(file)) {
 286                 mWaitingToPreview = null;
 287                 int position = mViewPager.getCurrentItem();
 288                 mPreviewImagePagerAdapter.updateFile(position, file);
 289                 Log.e(TAG, "BEFORE NOTIFY DATA SET CHANGED");
 290                 mPreviewImagePagerAdapter.notifyDataSetChanged();
 291                 Log.e(TAG, "AFTER NOTIFY DATA SET CHANGED");
 292                 //Log.e(TAG, "BEFORE INVALIDATE");
 293                 //mViewPager.postInvalidate();
 294                 //Log.e(TAG, "AFTER INVALIDATE");
 295             }
 296         }
 297     }
 298
 299
 300     /**
 301      * This method will be invoked when a new page becomes selected. Animation is not necessarily complete.
 302      *
 303      *  @param  Position        Position index of the new selected page
 304      */
 305     @Override
 306     public void onPageSelected(int position) {
 307         Log.e(TAG, "onPageSelected " + position);
 308         OCFile currentFile = mPreviewImagePagerAdapter.getFileAt(position);
 309         getSupportActionBar().setTitle(currentFile.getFileName());
 310         if (currentFile.isDown()) {
 311             mWaitingToPreview = null;
 312         } else {
 313             mWaitingToPreview = currentFile;
 314             requestForDownload();
 315             mViewPager.invalidate();
 316         }
 317     }
 318
 319     /**
 320      * Called when the scroll state changes. Useful for discovering when the user begins dragging,
 321      * when the pager is automatically settling to the current page, or when it is fully stopped/idle.
 322      *
 323      * @param   State       The new scroll state (SCROLL_STATE_IDLE, _DRAGGING, _SETTLING
 324      */
 325     @Override
 326     public void onPageScrollStateChanged(int state) {
 327     }
 328
 329     /**
 330      * This method will be invoked when the current page is scrolled, either as part of a programmatically
 331      * initiated smooth scroll or a user initiated touch scroll.
 332      *
 333      * @param   position                Position index of the first page currently being displayed.
 334      *                                  Page position+1 will be visible if positionOffset is nonzero.
 335      *
 336      * @param   positionOffset          Value from [0, 1) indicating the offset from the page at position.
 337      * @param   positionOffsetPixels    Value in pixels indicating the offset from position.
 338      */
 339     @Override
 340     public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
 341     }
 342
 343 }