app/src/main/java/net/ktnx/mobileledger/ui/activity/MainActivity.java

   1 /*
   2  * Copyright © 2019 Damyan Ivanov.
   3  * This file is part of MoLe.
   4  * MoLe is free software: you can distribute it and/or modify it
   5  * under the term of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your opinion), any later version.
   8  *
   9  * MoLe 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 terms for details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with MoLe. If not, see <https://www.gnu.org/licenses/>.
  16  */
  17
  18 package net.ktnx.mobileledger.ui.activity;
  19
  20 import android.content.Intent;
  21 import android.content.pm.PackageInfo;
  22 import android.content.pm.ShortcutInfo;
  23 import android.content.pm.ShortcutManager;
  24 import android.content.res.ColorStateList;
  25 import android.graphics.Color;
  26 import android.graphics.drawable.Icon;
  27 import android.os.AsyncTask;
  28 import android.os.Build;
  29 import android.os.Bundle;
  30 import android.util.Log;
  31 import android.view.View;
  32 import android.view.ViewGroup;
  33 import android.view.ViewPropertyAnimator;
  34 import android.view.animation.Animation;
  35 import android.view.animation.AnimationUtils;
  36 import android.widget.LinearLayout;
  37 import android.widget.ProgressBar;
  38 import android.widget.TextView;
  39 import android.widget.Toast;
  40
  41 import com.google.android.material.floatingactionbutton.FloatingActionButton;
  42
  43 import net.ktnx.mobileledger.R;
  44 import net.ktnx.mobileledger.async.DbOpQueue;
  45 import net.ktnx.mobileledger.async.RefreshDescriptionsTask;
  46 import net.ktnx.mobileledger.async.RetrieveTransactionsTask;
  47 import net.ktnx.mobileledger.model.Data;
  48 import net.ktnx.mobileledger.model.LedgerAccount;
  49 import net.ktnx.mobileledger.model.MobileLedgerProfile;
  50 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryAdapter;
  51 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryFragment;
  52 import net.ktnx.mobileledger.ui.account_summary.AccountSummaryViewModel;
  53 import net.ktnx.mobileledger.ui.profiles.ProfileDetailFragment;
  54 import net.ktnx.mobileledger.ui.profiles.ProfilesRecyclerViewAdapter;
  55 import net.ktnx.mobileledger.ui.transaction_list.TransactionListFragment;
  56 import net.ktnx.mobileledger.ui.transaction_list.TransactionListViewModel;
  57 import net.ktnx.mobileledger.utils.Colors;
  58 import net.ktnx.mobileledger.utils.LockHolder;
  59 import net.ktnx.mobileledger.utils.MLDB;
  60
  61 import java.lang.ref.WeakReference;
  62 import java.text.DateFormat;
  63 import java.util.ArrayList;
  64 import java.util.Date;
  65 import java.util.List;
  66 import java.util.Observer;
  67
  68 import androidx.appcompat.app.ActionBarDrawerToggle;
  69 import androidx.appcompat.widget.Toolbar;
  70 import androidx.core.view.GravityCompat;
  71 import androidx.drawerlayout.widget.DrawerLayout;
  72 import androidx.fragment.app.Fragment;
  73 import androidx.fragment.app.FragmentManager;
  74 import androidx.fragment.app.FragmentPagerAdapter;
  75 import androidx.recyclerview.widget.LinearLayoutManager;
  76 import androidx.recyclerview.widget.RecyclerView;
  77 import androidx.viewpager.widget.ViewPager;
  78
  79 public class MainActivity extends ProfileThemedActivity {
  80     public static final String STATE_CURRENT_PAGE = "current_page";
  81     public static final String BUNDLE_SAVED_STATE = "bundle_savedState";
  82     public static final String STATE_ACC_FILTER = "account_filter";
  83     public AccountSummaryFragment mAccountSummaryFragment;
  84     DrawerLayout drawer;
  85     private LinearLayout profileListContainer;
  86     private View profileListHeadArrow, profileListHeadMore, profileListHeadCancel;
  87     private LinearLayout profileListHeadMoreAndCancel;
  88     private FragmentManager fragmentManager;
  89     private TextView tvLastUpdate;
  90     private RetrieveTransactionsTask retrieveTransactionsTask;
  91     private View bTransactionListCancelDownload;
  92     private ProgressBar progressBar;
  93     private LinearLayout progressLayout;
  94     private SectionsPagerAdapter mSectionsPagerAdapter;
  95     private ViewPager mViewPager;
  96     private FloatingActionButton fab;
  97     private boolean profileModificationEnabled = false;
  98     private boolean profileListExpanded = false;
  99     private ProfilesRecyclerViewAdapter mProfileListAdapter;
 100     private int mCurrentPage;
 101     private String mAccountFilter;
 102     private boolean mBackMeansToAccountList = false;
 103     private Observer profileObserver;
 104     private Observer profilesObserver;
 105     private Observer lastUpdateDateObserver;
 106     private Toolbar mToolbar;
 107     private DrawerLayout.SimpleDrawerListener drawerListener;
 108     private ActionBarDrawerToggle barDrawerToggle;
 109     private ViewPager.SimpleOnPageChangeListener pageChangeListener;
 110     private Observer editingProfilesObserver;
 111     @Override
 112     protected void onStart() {
 113         super.onStart();
 114
 115         Log.d("flow", "MainActivity.onStart()");
 116         mViewPager.setCurrentItem(mCurrentPage, false);
 117         if (mAccountFilter != null) showTransactionsFragment(mAccountFilter);
 118         else Data.accountFilter.set(null);
 119
 120     }
 121     @Override
 122     protected void onSaveInstanceState(Bundle outState) {
 123         super.onSaveInstanceState(outState);
 124         outState.putInt(STATE_CURRENT_PAGE, mViewPager.getCurrentItem());
 125         if (Data.accountFilter.get() != null)
 126             outState.putString(STATE_ACC_FILTER, Data.accountFilter.get());
 127     }
 128     @Override
 129     protected void onDestroy() {
 130         mSectionsPagerAdapter = null;
 131         Data.profile.deleteObserver(profileObserver);
 132         profileObserver = null;
 133         Data.profiles.deleteObserver(profilesObserver);
 134         profilesObserver = null;
 135         Data.lastUpdateDate.deleteObserver(lastUpdateDateObserver);
 136         lastUpdateDateObserver = null;
 137         RecyclerView root = findViewById(R.id.nav_profile_list);
 138         if (root != null) root.setAdapter(null);
 139         if (drawer != null) drawer.removeDrawerListener(drawerListener);
 140         drawerListener = null;
 141         if (drawer != null) drawer.removeDrawerListener(barDrawerToggle);
 142         barDrawerToggle = null;
 143         if (mViewPager != null) mViewPager.removeOnPageChangeListener(pageChangeListener);
 144         pageChangeListener = null;
 145         if (mProfileListAdapter != null)
 146             mProfileListAdapter.deleteEditingProfilesObserver(editingProfilesObserver);
 147         editingProfilesObserver = null;
 148         super.onDestroy();
 149     }
 150     @Override
 151     protected void onCreate(Bundle savedInstanceState) {
 152         super.onCreate(savedInstanceState);
 153         Log.d("flow", "MainActivity.onCreate()");
 154         int profileColor = Data.retrieveCurrentThemeIdFromDb();
 155         Colors.setupTheme(this, profileColor);
 156         Colors.profileThemeId = profileColor;
 157         setContentView(R.layout.activity_main);
 158
 159         fab = findViewById(R.id.btn_add_transaction);
 160         profileListContainer = findViewById(R.id.nav_profile_list_container);
 161         profileListHeadArrow = findViewById(R.id.nav_profiles_arrow);
 162         profileListHeadMore = findViewById(R.id.nav_profiles_start_edit);
 163         profileListHeadCancel = findViewById(R.id.nav_profiles_cancel_edit);
 164         profileListHeadMoreAndCancel = findViewById(R.id.nav_profile_list_head_buttons);
 165         drawer = findViewById(R.id.drawer_layout);
 166         tvLastUpdate = findViewById(R.id.transactions_last_update);
 167         bTransactionListCancelDownload = findViewById(R.id.transaction_list_cancel_download);
 168         progressBar = findViewById(R.id.transaction_list_progress_bar);
 169         progressLayout = findViewById(R.id.transaction_progress_layout);
 170         fragmentManager = getSupportFragmentManager();
 171         mSectionsPagerAdapter = new SectionsPagerAdapter(fragmentManager);
 172         mViewPager = findViewById(R.id.root_frame);
 173
 174         Bundle extra = getIntent().getBundleExtra(BUNDLE_SAVED_STATE);
 175         if (extra != null && savedInstanceState == null) savedInstanceState = extra;
 176
 177
 178         mToolbar = findViewById(R.id.toolbar);
 179         setSupportActionBar(mToolbar);
 180
 181         if (profileObserver == null) {
 182             profileObserver = (o, arg) -> onProfileChanged(arg);
 183             Data.profile.addObserver(profileObserver);
 184         }
 185
 186         if (profilesObserver == null) {
 187             profilesObserver = (o, arg) -> onProfileListChanged(arg);
 188             Data.profiles.addObserver(profilesObserver);
 189         }
 190
 191         if (barDrawerToggle == null) {
 192             barDrawerToggle = new ActionBarDrawerToggle(this, drawer, mToolbar,
 193                     R.string.navigation_drawer_open, R.string.navigation_drawer_close);
 194             drawer.addDrawerListener(barDrawerToggle);
 195         }
 196         barDrawerToggle.syncState();
 197
 198         TextView ver = drawer.findViewById(R.id.drawer_version_text);
 199
 200         try {
 201             PackageInfo pi =
 202                     getApplicationContext().getPackageManager().getPackageInfo(getPackageName(), 0);
 203             ver.setText(pi.versionName);
 204         }
 205         catch (Exception e) {
 206             e.printStackTrace();
 207         }
 208
 209         if (progressBar == null)
 210             throw new RuntimeException("Can't get hold on the transaction value progress bar");
 211         if (progressLayout == null) throw new RuntimeException(
 212                 "Can't get hold on the transaction value progress bar layout");
 213
 214         markDrawerItemCurrent(R.id.nav_account_summary);
 215
 216         mViewPager.setAdapter(mSectionsPagerAdapter);
 217
 218         if (pageChangeListener == null) {
 219             pageChangeListener = new ViewPager.SimpleOnPageChangeListener() {
 220                 @Override
 221                 public void onPageSelected(int position) {
 222                     switch (position) {
 223                         case 0:
 224                             markDrawerItemCurrent(R.id.nav_account_summary);
 225                             break;
 226                         case 1:
 227                             markDrawerItemCurrent(R.id.nav_latest_transactions);
 228                             break;
 229                         default:
 230                             Log.e("MainActivity",
 231                                     String.format("Unexpected page index %d", position));
 232                     }
 233
 234                     super.onPageSelected(position);
 235                 }
 236             };
 237             mViewPager.addOnPageChangeListener(pageChangeListener);
 238         }
 239
 240         mCurrentPage = 0;
 241         if (savedInstanceState != null) {
 242             int currentPage = savedInstanceState.getInt(STATE_CURRENT_PAGE, -1);
 243             if (currentPage != -1) {
 244                 mCurrentPage = currentPage;
 245             }
 246             mAccountFilter = savedInstanceState.getString(STATE_ACC_FILTER, null);
 247         }
 248         else mAccountFilter = null;
 249
 250         if (lastUpdateDateObserver == null) {
 251             lastUpdateDateObserver = (o, arg) -> {
 252                 Log.d("main", "lastUpdateDate changed");
 253                 runOnUiThread(this::updateLastUpdateDisplay);
 254             };
 255             Data.lastUpdateDate.addObserver(lastUpdateDateObserver);
 256         }
 257
 258         updateLastUpdateDisplay();
 259
 260         findViewById(R.id.btn_no_profiles_add)
 261                 .setOnClickListener(v -> startEditProfileActivity(null));
 262
 263         findViewById(R.id.btn_add_transaction).setOnClickListener(this::fabNewTransactionClicked);
 264
 265         findViewById(R.id.nav_new_profile_button)
 266                 .setOnClickListener(v -> startEditProfileActivity(null));
 267
 268         RecyclerView root = findViewById(R.id.nav_profile_list);
 269         if (root == null)
 270             throw new RuntimeException("Can't get hold on the transaction value view");
 271
 272         if (mProfileListAdapter == null) mProfileListAdapter = new ProfilesRecyclerViewAdapter();
 273         root.setAdapter(mProfileListAdapter);
 274
 275         if (editingProfilesObserver == null) {
 276             editingProfilesObserver = (o, arg) -> {
 277                 if (mProfileListAdapter.isEditingProfiles()) {
 278                     profileListHeadArrow.clearAnimation();
 279                     profileListHeadArrow.setVisibility(View.GONE);
 280                     profileListHeadMore.setVisibility(View.GONE);
 281                     profileListHeadCancel.setVisibility(View.VISIBLE);
 282                 }
 283                 else {
 284                     profileListHeadArrow.setRotation(180f);
 285                     profileListHeadArrow.setVisibility(View.VISIBLE);
 286                     profileListHeadCancel.setVisibility(View.GONE);
 287                     profileListHeadMore.setVisibility(View.GONE);
 288                     profileListHeadMore.setVisibility(profileListExpanded ? View.VISIBLE : View.GONE);
 289                 }
 290             };
 291             mProfileListAdapter.addEditingProfilesObserver(editingProfilesObserver);
 292         }
 293
 294         LinearLayoutManager llm = new LinearLayoutManager(this);
 295
 296         llm.setOrientation(RecyclerView.VERTICAL);
 297         root.setLayoutManager(llm);
 298
 299         profileListHeadMore.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 300         profileListHeadCancel.setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 301         profileListHeadMoreAndCancel
 302                 .setOnClickListener((v) -> mProfileListAdapter.flipEditingProfiles());
 303
 304         if (drawerListener == null) {
 305             drawerListener = new DrawerLayout.SimpleDrawerListener() {
 306                 @Override
 307                 public void onDrawerClosed(View drawerView) {
 308                     super.onDrawerClosed(drawerView);
 309                     collapseProfileList();
 310                 }
 311             };
 312             drawer.addDrawerListener(drawerListener);
 313         }
 314
 315         findViewById(R.id.nav_profile_list_head_layout)
 316                 .setOnClickListener(this::navProfilesHeadClicked);
 317         findViewById(R.id.nav_profiles_label).setOnClickListener(this::navProfilesHeadClicked);
 318         setupProfile();
 319         onProfileChanged(null);
 320
 321         updateLastUpdateTextFromDB();
 322
 323         scheduleDataRetrievalIfStale();
 324     }
 325     private void scheduleDataRetrievalIfStale() {
 326         Date lastUpdate = Data.lastUpdateDate.get();
 327         long now = new Date().getTime();
 328         if ((lastUpdate == null) || (now > (lastUpdate.getTime() + (24 * 3600 * 1000)))) {
 329             if (lastUpdate == null) Log.d("db::", "WEB data never fetched. scheduling a fetch");
 330             else Log.d("db",
 331                     String.format("WEB data last fetched at %1.3f and now is %1.3f. re-fetching",
 332                             lastUpdate.getTime() / 1000f, now / 1000f));
 333
 334             scheduleTransactionListRetrieval();
 335         }
 336     }
 337     private void createShortcuts() {
 338         if (Build.VERSION.SDK_INT < Build.VERSION_CODES.N) return;
 339
 340         List<ShortcutInfo> shortcuts = new ArrayList<>();
 341         try (LockHolder lh = Data.profiles.lockForReading()) {
 342             for (int i = 0; i < Data.profiles.size(); i++) {
 343                 MobileLedgerProfile p = Data.profiles.get(i);
 344                 if (!p.isPostingPermitted()) continue;
 345
 346                 ShortcutInfo si = new ShortcutInfo.Builder(this, "new_transaction_" + p.getUuid())
 347                         .setShortLabel(p.getName())
 348                         .setIcon(Icon.createWithResource(this, R.drawable.svg_thick_plus_white))
 349                         .setIntent(new Intent(Intent.ACTION_VIEW, null, this,
 350                                 NewTransactionActivity.class).putExtra("profile_uuid", p.getUuid()))
 351                         .setRank(i).build();
 352                 shortcuts.add(si);
 353             }
 354         }
 355         ShortcutManager sm = getSystemService(ShortcutManager.class);
 356         sm.setDynamicShortcuts(shortcuts);
 357     }
 358     private void onProfileListChanged(Object arg) {
 359         findViewById(R.id.nav_profile_list).setMinimumHeight(
 360                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 361                        Data.profiles.size()));
 362
 363         Log.d("profiles", "profile list changed");
 364         if (arg == null) mProfileListAdapter.notifyDataSetChanged();
 365         else mProfileListAdapter.notifyItemChanged((int) arg);
 366
 367         createShortcuts();
 368     }
 369     private void onProfileChanged(Object arg) {
 370         MobileLedgerProfile profile = Data.profile.get();
 371         MainActivity.this.runOnUiThread(() -> {
 372
 373             boolean haveProfile = profile != null;
 374             findViewById(R.id.no_profiles_layout).setVisibility(haveProfile ? View.GONE : View.VISIBLE);
 375             findViewById(R.id.pager_layout)
 376                     .setVisibility(haveProfile ? View.VISIBLE : View.VISIBLE);
 377
 378             Data.transactions.clear();
 379             Log.d("transactions", "requesting list reload");
 380             TransactionListViewModel.scheduleTransactionListReload();
 381
 382             Data.accounts.clear();
 383             AccountSummaryViewModel.scheduleAccountListReload();
 384
 385             if (profile == null) MainActivity.this.setTitle(R.string.app_name);
 386             else MainActivity.this.setTitle(profile.getName());
 387             MainActivity.this.updateLastUpdateTextFromDB();
 388             int old_index = -1;
 389             int new_index = -1;
 390             if (arg != null) {
 391                 MobileLedgerProfile old = (MobileLedgerProfile) arg;
 392                 old_index = Data.getProfileIndex(old);
 393                 new_index = Data.getProfileIndex(profile);
 394             }
 395
 396             if ((old_index != -1) && (new_index != -1)) {
 397                 mProfileListAdapter.notifyItemChanged(old_index);
 398                 mProfileListAdapter.notifyItemChanged(new_index);
 399             }
 400             else mProfileListAdapter.notifyDataSetChanged();
 401
 402             MainActivity.this.collapseProfileList();
 403
 404             int newProfileTheme = (profile == null) ? -1 : profile.getThemeId();
 405             if (newProfileTheme != Colors.profileThemeId) {
 406                 Log.d("profiles", String.format("profile theme %d → %d", Colors.profileThemeId,
 407                         newProfileTheme));
 408                 MainActivity.this.profileThemeChanged();
 409                 Colors.profileThemeId = newProfileTheme;
 410                 // profileThemeChanged would restart the activity, so no need to reload the
 411                 // data sets below
 412                 return;
 413             }
 414             drawer.closeDrawers();
 415
 416             if (profile == null) {
 417                 mToolbar.setSubtitle(null);
 418                 fab.hide();
 419             }
 420             else {
 421                 if (profile.isPostingPermitted()) {
 422                     mToolbar.setSubtitle(null);
 423                     fab.show();
 424                 }
 425                 else {
 426                     mToolbar.setSubtitle(R.string.profile_subitlte_read_only);
 427                     fab.hide();
 428                 }
 429             }
 430
 431             updateLastUpdateTextFromDB();
 432
 433             scheduleDataRetrievalIfStale();
 434         });
 435     }
 436     private void updateLastUpdateDisplay() {
 437         LinearLayout l = findViewById(R.id.transactions_last_update_layout);
 438         TextView v = findViewById(R.id.transactions_last_update);
 439         Date date = Data.lastUpdateDate.get();
 440         if (date == null) {
 441             l.setVisibility(View.INVISIBLE);
 442             Log.d("main", "no last update date :(");
 443         }
 444         else {
 445             final String text = DateFormat.getDateTimeInstance().format(date);
 446             v.setText(text);
 447             l.setVisibility(View.VISIBLE);
 448             Log.d("main", String.format("Date formatted: %s", text));
 449         }
 450     }
 451     @Override
 452     public void finish() {
 453         if (profilesObserver != null) {
 454             Data.profiles.deleteObserver(profilesObserver);
 455             profilesObserver = null;
 456         }
 457
 458         if (profileObserver != null) {
 459             Data.profile.deleteObserver(profileObserver);
 460             profileObserver = null;
 461         }
 462
 463         super.finish();
 464     }
 465     private void profileThemeChanged() {
 466         setupProfileColors();
 467
 468         Bundle bundle = new Bundle();
 469         onSaveInstanceState(bundle);
 470         // restart activity to reflect theme change
 471         finish();
 472         Intent intent = new Intent(this, this.getClass());
 473         intent.putExtra(BUNDLE_SAVED_STATE, bundle);
 474         startActivity(intent);
 475     }
 476     public void startEditProfileActivity(MobileLedgerProfile profile) {
 477         Intent intent = new Intent(this, ProfileDetailActivity.class);
 478         Bundle args = new Bundle();
 479         if (profile != null) {
 480             int index = Data.getProfileIndex(profile);
 481             if (index != -1) intent.putExtra(ProfileDetailFragment.ARG_ITEM_ID, index);
 482         }
 483         intent.putExtras(args);
 484         startActivity(intent, args);
 485     }
 486     private void setupProfile() {
 487         String profileUUID = MLDB.getOption(MLDB.OPT_PROFILE_UUID, null);
 488         MobileLedgerProfile profile;
 489
 490         profile = Data.getProfile(profileUUID);
 491
 492         if (Data.profiles.isEmpty()) {
 493             findViewById(R.id.no_profiles_layout).setVisibility(View.VISIBLE);
 494             findViewById(R.id.pager_layout).setVisibility(View.GONE);
 495             return;
 496         }
 497
 498         findViewById(R.id.pager_layout).setVisibility(View.VISIBLE);
 499         findViewById(R.id.no_profiles_layout).setVisibility(View.GONE);
 500
 501         if (profile == null) profile = Data.profiles.get(0);
 502
 503         if (profile == null) throw new AssertionError("profile must have a value");
 504
 505         Data.setCurrentProfile(profile);
 506     }
 507     public void fabNewTransactionClicked(View view) {
 508         Intent intent = new Intent(this, NewTransactionActivity.class);
 509         startActivity(intent);
 510         overridePendingTransition(R.anim.slide_in_right, R.anim.dummy);
 511     }
 512     public void navSettingsClicked(View view) {
 513         Intent intent = new Intent(this, SettingsActivity.class);
 514         startActivity(intent);
 515         drawer.closeDrawers();
 516     }
 517     public void markDrawerItemCurrent(int id) {
 518         TextView item = drawer.findViewById(id);
 519         item.setBackgroundColor(Colors.tableRowDarkBG);
 520
 521         LinearLayout actions = drawer.findViewById(R.id.nav_actions);
 522         for (int i = 0; i < actions.getChildCount(); i++) {
 523             View view = actions.getChildAt(i);
 524             if (view.getId() != id) {
 525                 view.setBackgroundColor(Color.TRANSPARENT);
 526             }
 527         }
 528     }
 529     public void onAccountSummaryClicked(View view) {
 530         drawer.closeDrawers();
 531
 532         showAccountSummaryFragment();
 533     }
 534     private void showAccountSummaryFragment() {
 535         mViewPager.setCurrentItem(0, true);
 536         Data.accountFilter.set(null);
 537 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 538 //        accountSummaryFragment = new AccountSummaryFragment();
 539 //        ft.replace(R.id.root_frame, accountSummaryFragment);
 540 //        ft.commit();
 541 //        currentFragment = accountSummaryFragment;
 542     }
 543     public void onLatestTransactionsClicked(View view) {
 544         drawer.closeDrawers();
 545
 546         showTransactionsFragment((String) null);
 547     }
 548     private void resetFragmentBackStack() {
 549 //        fragmentManager.popBackStack(0, FragmentManager.POP_BACK_STACK_INCLUSIVE);
 550     }
 551     private void showTransactionsFragment(String accName) {
 552         Data.accountFilter.set(accName);
 553         Data.accountFilter.notifyObservers();
 554         mViewPager.setCurrentItem(1, true);
 555     }
 556     private void showTransactionsFragment(LedgerAccount account) {
 557         showTransactionsFragment((account == null) ? (String) null : account.getName());
 558 //        FragmentTransaction ft = fragmentManager.beginTransaction();
 559 //        if (transactionListFragment == null) {
 560 //            Log.d("flow", "MainActivity creating TransactionListFragment");
 561 //            transactionListFragment = new TransactionListFragment();
 562 //        }
 563 //        Bundle bundle = new Bundle();
 564 //        if (account != null) {
 565 //            bundle.putString(TransactionListFragment.BUNDLE_KEY_FILTER_ACCOUNT_NAME,
 566 //                    account.getName());
 567 //        }
 568 //        transactionListFragment.setArguments(bundle);
 569 //        ft.replace(R.id.root_frame, transactionListFragment);
 570 //        if (account != null)
 571 //            ft.addToBackStack(getResources().getString(R.string.title_activity_transaction_list));
 572 //        ft.commit();
 573 //
 574 //        currentFragment = transactionListFragment;
 575     }
 576     public void showAccountTransactions(LedgerAccount account) {
 577         mBackMeansToAccountList = true;
 578         showTransactionsFragment(account);
 579     }
 580     @Override
 581     public void onBackPressed() {
 582         DrawerLayout drawer = findViewById(R.id.drawer_layout);
 583         if (drawer.isDrawerOpen(GravityCompat.START)) {
 584             drawer.closeDrawer(GravityCompat.START);
 585         }
 586         else {
 587             if (mBackMeansToAccountList && (mViewPager.getCurrentItem() == 1)) {
 588                 Data.accountFilter.set(null);
 589                 showAccountSummaryFragment();
 590                 mBackMeansToAccountList = false;
 591             }
 592             else {
 593                 Log.d("fragments", String.format("manager stack: %d",
 594                         fragmentManager.getBackStackEntryCount()));
 595
 596                 super.onBackPressed();
 597             }
 598         }
 599     }
 600     public void updateLastUpdateTextFromDB() {
 601         {
 602             final MobileLedgerProfile profile = Data.profile.get();
 603             long last_update =
 604                     (profile != null) ? profile.getLongOption(MLDB.OPT_LAST_SCRAPE, 0L) : 0;
 605
 606             Log.d("transactions", String.format("Last update = %d", last_update));
 607             if (last_update == 0) {
 608                 Data.lastUpdateDate.set(null);
 609             }
 610             else {
 611                 Data.lastUpdateDate.set(new Date(last_update));
 612             }
 613         }
 614     }
 615     public void scheduleTransactionListRetrieval() {
 616         if (Data.profile.get() == null) return;
 617
 618         retrieveTransactionsTask = new RetrieveTransactionsTask(new WeakReference<>(this));
 619
 620         retrieveTransactionsTask.execute();
 621     }
 622     public void onStopTransactionRefreshClick(View view) {
 623         Log.d("interactive", "Cancelling transactions refresh");
 624         if (retrieveTransactionsTask != null) retrieveTransactionsTask.cancel(false);
 625         bTransactionListCancelDownload.setEnabled(false);
 626     }
 627     public void onRetrieveDone(String error) {
 628         progressLayout.setVisibility(View.GONE);
 629
 630         if (error == null) {
 631             updateLastUpdateTextFromDB();
 632
 633             new RefreshDescriptionsTask().executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
 634             TransactionListViewModel.scheduleTransactionListReload();
 635         }
 636         else Toast.makeText(this, error, Toast.LENGTH_LONG).show();
 637     }
 638     public void onRetrieveStart() {
 639         bTransactionListCancelDownload.setEnabled(true);
 640         progressBar.setIndeterminateTintList(ColorStateList.valueOf(Colors.primary));
 641         progressBar.setProgressTintList(ColorStateList.valueOf(Colors.primary));
 642         progressBar.setIndeterminate(true);
 643         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) progressBar.setProgress(0, false);
 644         else progressBar.setProgress(0);
 645         progressLayout.setVisibility(View.VISIBLE);
 646     }
 647     public void onRetrieveProgress(RetrieveTransactionsTask.Progress progress) {
 648         if ((progress.getTotal() == RetrieveTransactionsTask.Progress.INDETERMINATE) ||
 649             (progress.getTotal() == 0))
 650         {
 651             progressBar.setIndeterminate(true);
 652         }
 653         else {
 654             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
 655                 progressBar.setMin(0);
 656             }
 657             progressBar.setMax(progress.getTotal());
 658             if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.N) {
 659                 progressBar.setProgress(progress.getProgress(), true);
 660             }
 661             else progressBar.setProgress(progress.getProgress());
 662             progressBar.setIndeterminate(false);
 663         }
 664     }
 665     public void fabShouldShow() {
 666         MobileLedgerProfile profile = Data.profile.get();
 667         if ((profile != null) && profile.isPostingPermitted()) fab.show();
 668     }
 669     public void navProfilesHeadClicked(View view) {
 670         if (profileListExpanded) {
 671             collapseProfileList();
 672         }
 673         else {
 674             expandProfileList();
 675         }
 676     }
 677     private void expandProfileList() {
 678         profileListExpanded = true;
 679
 680
 681         profileListContainer.setVisibility(View.VISIBLE);
 682         profileListContainer.startAnimation(AnimationUtils.loadAnimation(this, R.anim.slide_down));
 683         profileListHeadArrow.startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180));
 684         profileListHeadMore.setVisibility(View.VISIBLE);
 685         profileListHeadMore.startAnimation(AnimationUtils.loadAnimation(this, R.anim.fade_in));
 686         findViewById(R.id.nav_profile_list).setMinimumHeight(
 687                 (int) (getResources().getDimension(R.dimen.thumb_row_height) *
 688                        Data.profiles.size()));
 689     }
 690     private void collapseProfileList() {
 691         profileListExpanded = false;
 692
 693         final Animation animation = AnimationUtils.loadAnimation(this, R.anim.slide_up);
 694         animation.setAnimationListener(new Animation.AnimationListener() {
 695             @Override
 696             public void onAnimationStart(Animation animation) {
 697
 698             }
 699             @Override
 700             public void onAnimationEnd(Animation animation) {
 701                 profileListContainer.setVisibility(View.GONE);
 702             }
 703             @Override
 704             public void onAnimationRepeat(Animation animation) {
 705
 706             }
 707         });
 708         mProfileListAdapter.stopEditingProfiles();
 709
 710         profileListContainer.startAnimation(animation);
 711         profileListHeadArrow.setRotation(0f);
 712         profileListHeadArrow
 713                 .startAnimation(AnimationUtils.loadAnimation(this, R.anim.rotate_180_back));
 714         profileListHeadMore.setVisibility(View.GONE);
 715     }
 716     public void onProfileRowClicked(View v) {
 717         Data.setCurrentProfile((MobileLedgerProfile) v.getTag());
 718     }
 719     public void enableProfileModifications() {
 720         profileModificationEnabled = true;
 721         ViewGroup profileList = findViewById(R.id.nav_profile_list);
 722         for (int i = 0; i < profileList.getChildCount(); i++) {
 723             View aRow = profileList.getChildAt(i);
 724             aRow.findViewById(R.id.profile_list_edit_button).setVisibility(View.VISIBLE);
 725             aRow.findViewById(R.id.profile_list_rearrange_handle).setVisibility(View.VISIBLE);
 726         }
 727         // FIXME enable rearranging
 728
 729     }
 730     public void disableProfileModifications() {
 731         profileModificationEnabled = false;
 732         ViewGroup profileList = findViewById(R.id.nav_profile_list);
 733         for (int i = 0; i < profileList.getChildCount(); i++) {
 734             View aRow = profileList.getChildAt(i);
 735             aRow.findViewById(R.id.profile_list_edit_button).setVisibility(View.GONE);
 736             aRow.findViewById(R.id.profile_list_rearrange_handle).setVisibility(View.INVISIBLE);
 737         }
 738         // FIXME disable rearranging
 739
 740     }
 741     public void onAccountSummaryRowViewClicked(View view) {
 742         ViewGroup row;
 743         if (view.getId() == R.id.account_expander) row = (ViewGroup) view.getParent().getParent();
 744         else row = (ViewGroup) view.getParent();
 745
 746         LedgerAccount acc = (LedgerAccount) row.getTag();
 747         switch (view.getId()) {
 748             case R.id.account_row_acc_name:
 749             case R.id.account_expander:
 750             case R.id.account_expander_container:
 751                 Log.d("accounts", "Account expander clicked");
 752                 if (!acc.hasSubAccounts()) return;
 753
 754                 boolean wasExpanded = acc.isExpanded();
 755
 756                 View arrow = row.findViewById(R.id.account_expander_container);
 757
 758                 arrow.clearAnimation();
 759                 ViewPropertyAnimator animator = arrow.animate();
 760
 761                 acc.toggleExpanded();
 762                 DbOpQueue.add("update accounts set expanded=? where name=? and profile=?",
 763                         new Object[]{acc.isExpanded(), acc.getName(), Data.profile.get().getUuid()
 764                         });
 765
 766                 if (wasExpanded) {
 767                     Log.d("accounts", String.format("Collapsing account '%s'", acc.getName()));
 768                     arrow.setRotation(0);
 769                     animator.rotationBy(180);
 770
 771                     // removing all child accounts from the view
 772                     int start = -1, count = 0;
 773                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 774                         for (int i = 0; i < Data.accounts.size(); i++) {
 775                             if (acc.isParentOf(Data.accounts.get(i))) {
 776 //                                Log.d("accounts", String.format("Found a child '%s' at position %d",
 777 //                                        Data.accounts.get(i).getName(), i));
 778                                 if (start == -1) {
 779                                     start = i;
 780                                 }
 781                                 count++;
 782                             }
 783                             else {
 784                                 if (start != -1) {
 785 //                                    Log.d("accounts",
 786 //                                            String.format("Found a non-child '%s' at position %d",
 787 //                                                    Data.accounts.get(i).getName(), i));
 788                                     break;
 789                                 }
 790                             }
 791                         }
 792
 793                         if (start != -1) {
 794                             for (int j = 0; j < count; j++) {
 795 //                                Log.d("accounts", String.format("Removing item %d: %s", start + j,
 796 //                                        Data.accounts.get(start).getName()));
 797                                 Data.accounts.removeQuietly(start);
 798                             }
 799
 800                             mAccountSummaryFragment.modelAdapter
 801                                     .notifyItemRangeRemoved(start, count);
 802                         }
 803                     }
 804                 }
 805                 else {
 806                     Log.d("accounts", String.format("Expanding account '%s'", acc.getName()));
 807                     arrow.setRotation(180);
 808                     animator.rotationBy(-180);
 809                     List<LedgerAccount> children =
 810                             Data.profile.get().loadVisibleChildAccountsOf(acc);
 811                     try (LockHolder lh = Data.accounts.lockForWriting()) {
 812                         int parentPos = Data.accounts.indexOf(acc);
 813                         if (parentPos != -1) {
 814                             // may have disappeared in a concurrent refresh operation
 815                             Data.accounts.addAllQuietly(parentPos + 1, children);
 816                             mAccountSummaryFragment.modelAdapter
 817                                     .notifyItemRangeInserted(parentPos + 1, children.size());
 818                         }
 819                     }
 820                 }
 821                 break;
 822             case R.id.account_row_acc_amounts:
 823                 if (acc.getAmountCount() > AccountSummaryAdapter.AMOUNT_LIMIT) {
 824                     acc.toggleAmountsExpanded();
 825                     DbOpQueue
 826                             .add("update accounts set amounts_expanded=? where name=? and profile=?",
 827                                     new Object[]{acc.amountsExpanded(), acc.getName(),
 828                                                  Data.profile.get().getUuid()
 829                                     });
 830                     Data.accounts.triggerItemChangedNotification(acc);
 831                 }
 832                 break;
 833         }
 834     }
 835
 836     public class SectionsPagerAdapter extends FragmentPagerAdapter {
 837
 838         public SectionsPagerAdapter(FragmentManager fm) {
 839             super(fm);
 840         }
 841
 842         @Override
 843         public Fragment getItem(int position) {
 844             Log.d("main", String.format("Switching to fragment %d", position));
 845             switch (position) {
 846                 case 0:
 847 //                    Log.d("flow", "Creating account summary fragment");
 848                     return mAccountSummaryFragment = new AccountSummaryFragment();
 849                 case 1:
 850                     return new TransactionListFragment();
 851                 default:
 852                     throw new IllegalStateException(
 853                             String.format("Unexpected fragment index: " + "%d", position));
 854             }
 855         }
 856
 857         @Override
 858         public int getCount() {
 859             return 2;
 860         }
 861     }
 862 }