src/uisupport/bufferview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-08 by the Quassel Project                          *
   3  *   devel@quassel-irc.org                                                 *
   4  *                                                                         *
   5  *   This program is free software; you can redistribute it and/or modify  *
   6  *   it under the terms of the GNU General Public License as published by  *
   7  *   the Free Software Foundation; either version 2 of the License, or     *
   8  *   (at your option) version 3.                                           *
   9  *                                                                         *
  10  *   This program is distributed in the hope that it will be useful,       *
  11  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  12  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  13  *   GNU General Public License for more details.                          *
  14  *                                                                         *
  15  *   You should have received a copy of the GNU General Public License     *
  16  *   along with this program; if not, write to the                         *
  17  *   Free Software Foundation, Inc.,                                       *
  18  *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
  19  ***************************************************************************/
  20
  21 #include "bufferview.h"
  22
  23 #include "buffermodel.h"
  24 #include "bufferviewfilter.h"
  25 #include "buffersettings.h"
  26 #include "buffersyncer.h"
  27 #include "client.h"
  28 #include "iconloader.h"
  29 #include "mappedselectionmodel.h"
  30 #include "network.h"
  31 #include "networkmodel.h"
  32
  33 #include "uisettings.h"
  34
  35 #include <QAction>
  36 #include <QFlags>
  37 #include <QHeaderView>
  38 #include <QInputDialog>
  39 #include <QLineEdit>
  40 #include <QMenu>
  41 #include <QMessageBox>
  42 #include <QSet>
  43
  44 /*****************************************
  45 * The TreeView showing the Buffers
  46 *****************************************/
  47 // Please be carefull when reimplementing methods which are used to inform the view about changes to the data
  48 // to be on the safe side: call QTreeView's method aswell
  49 BufferView::BufferView(QWidget *parent)
  50   : QTreeView(parent),
  51     showChannelList(tr("Show Channel List"), this),
  52     _connectNetAction(tr("Connect"), this),
  53     _disconnectNetAction(tr("Disconnect"), this),
  54     _joinChannelAction(tr("Join Channel"), this),
  55
  56     _joinBufferAction(tr("Join"), this),
  57     _partBufferAction(tr("Part"), this),
  58     _hideBufferTemporarilyAction(tr("Hide buffers"), this),
  59     _hideBufferPermanentlyAction(tr("Hide buffers permanently"), this),
  60     _removeBufferAction(tr("Delete buffer"), this),
  61     _ignoreListAction(tr("Ignore list"), this),
  62
  63     _hideJoinAction(tr("Joins"), this),
  64     _hidePartAction(tr("Parts"), this),
  65     _hideQuitAction(tr("Quits"), this),
  66     _hideNickAction(tr("Nick Changes"), this),
  67     _hideModeAction(tr("Mode"), this),
  68     _hideDayChangeAction(tr("Day Change"), this)
  69 {
  70   _hideJoinAction.setCheckable(true);
  71   _hidePartAction.setCheckable(true);
  72   _hideQuitAction.setCheckable(true);
  73   _hideNickAction.setCheckable(true);
  74   _hideModeAction.setCheckable(true);
  75   _hideDayChangeAction.setCheckable(true);
  76   _ignoreListAction.setEnabled(false);
  77
  78   showChannelList.setIcon(SmallIcon("format-list-unordered"));
  79
  80   connect(this, SIGNAL(collapsed(const QModelIndex &)), this, SLOT(on_collapse(const QModelIndex &)));
  81   connect(this, SIGNAL(expanded(const QModelIndex &)), this, SLOT(on_expand(const QModelIndex &)));
  82
  83   setSelectionMode(QAbstractItemView::ExtendedSelection);
  84 }
  85
  86 void BufferView::init() {
  87   setIndentation(10);
  88   header()->setContextMenuPolicy(Qt::ActionsContextMenu);
  89   hideColumn(1);
  90   hideColumn(2);
  91   expandAll();
  92
  93   setAnimated(true);
  94
  95 #ifndef QT_NO_DRAGANDDROP
  96   setDragEnabled(true);
  97   setAcceptDrops(true);
  98   setDropIndicatorShown(true);
  99 #endif
 100
 101   setSortingEnabled(true);
 102   sortByColumn(0, Qt::AscendingOrder);
 103
 104   // activated() fails on X11 and Qtopia at least
 105 #if defined Q_WS_QWS or defined Q_WS_X11
 106   connect(this, SIGNAL(doubleClicked(QModelIndex)), SLOT(joinChannel(QModelIndex)));
 107 #else
 108   // afaik this is better on Mac and Windows
 109   connect(this, SIGNAL(activated(QModelIndex)), SLOT(joinChannel(QModelIndex)));
 110 #endif
 111 }
 112
 113 void BufferView::setModel(QAbstractItemModel *model) {
 114   delete selectionModel();
 115
 116   QTreeView::setModel(model);
 117   init();
 118   // remove old Actions
 119   QList<QAction *> oldactions = header()->actions();
 120   foreach(QAction *action, oldactions) {
 121     header()->removeAction(action);
 122     action->deleteLater();
 123   }
 124
 125   if(!model)
 126     return;
 127
 128   QString sectionName;
 129   QAction *showSection;
 130   for(int i = 1; i < model->columnCount(); i++) {
 131     sectionName = (model->headerData(i, Qt::Horizontal, Qt::DisplayRole)).toString();
 132     showSection = new QAction(sectionName, header());
 133     showSection->setCheckable(true);
 134     showSection->setChecked(!isColumnHidden(i));
 135     showSection->setProperty("column", i);
 136     connect(showSection, SIGNAL(toggled(bool)), this, SLOT(toggleHeader(bool)));
 137     header()->addAction(showSection);
 138   }
 139
 140 }
 141
 142 void BufferView::setFilteredModel(QAbstractItemModel *model_, BufferViewConfig *config) {
 143   BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
 144   if(filter) {
 145     filter->setConfig(config);
 146     setConfig(config);
 147     return;
 148   }
 149
 150   if(model()) {
 151     disconnect(this, 0, model(), 0);
 152     disconnect(model(), 0, this, 0);
 153   }
 154
 155   if(!model_) {
 156     setModel(model_);
 157   } else {
 158     BufferViewFilter *filter = new BufferViewFilter(model_, config);
 159     setModel(filter);
 160     connect(filter, SIGNAL(configChanged()), this, SLOT(on_configChanged()));
 161   }
 162   setConfig(config);
 163 }
 164
 165 void BufferView::setSelectionModel(QItemSelectionModel *selectionModel) {
 166   if(QTreeView::selectionModel())
 167     disconnect(selectionModel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
 168                model(), SIGNAL(checkPreviousCurrentForRemoval(QModelIndex, QModelIndex)));
 169
 170   QTreeView::setSelectionModel(selectionModel);
 171   BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
 172   if(filter) {
 173     connect(selectionModel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
 174             filter, SLOT(checkPreviousCurrentForRemoval(QModelIndex, QModelIndex)));
 175   }
 176 }
 177
 178 void BufferView::setConfig(BufferViewConfig *config) {
 179   if(_config == config)
 180     return;
 181
 182   if(_config) {
 183     disconnect(_config, 0, this, 0);
 184   }
 185
 186   _config = config;
 187   if(config) {
 188     connect(config, SIGNAL(networkIdSet(const NetworkId &)), this, SLOT(setRootIndexForNetworkId(const NetworkId &)));
 189     setRootIndexForNetworkId(config->networkId());
 190   } else {
 191     setRootIndex(QModelIndex());
 192   }
 193 }
 194
 195 void BufferView::setRootIndexForNetworkId(const NetworkId &networkId) {
 196   if(!networkId.isValid() || !model()) {
 197     setRootIndex(QModelIndex());
 198   } else {
 199     int networkCount = model()->rowCount();
 200     QModelIndex child;
 201     for(int i = 0; i < networkCount; i++) {
 202       child = model()->index(i, 0);
 203       if(networkId == model()->data(child, NetworkModel::NetworkIdRole).value<NetworkId>())
 204         setRootIndex(child);
 205     }
 206   }
 207 }
 208
 209 void BufferView::joinChannel(const QModelIndex &index) {
 210   BufferInfo::Type bufferType = (BufferInfo::Type)index.data(NetworkModel::BufferTypeRole).value<int>();
 211
 212   if(bufferType != BufferInfo::ChannelBuffer)
 213     return;
 214
 215   BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
 216
 217   Client::userInput(bufferInfo, QString("/JOIN %1").arg(bufferInfo.bufferName()));
 218 }
 219
 220 void BufferView::keyPressEvent(QKeyEvent *event) {
 221   if(event->key() == Qt::Key_Backspace || event->key() == Qt::Key_Delete) {
 222     event->accept();
 223     removeSelectedBuffers();
 224   }
 225   QTreeView::keyPressEvent(event);
 226 }
 227
 228 void BufferView::removeSelectedBuffers(bool permanently) {
 229   if(!config())
 230     return;
 231
 232   BufferId bufferId;
 233   QSet<BufferId> removedRows;
 234   foreach(QModelIndex index, selectionModel()->selectedIndexes()) {
 235     if(index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
 236       continue;
 237
 238     bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 239     if(removedRows.contains(bufferId))
 240       continue;
 241
 242     removedRows << bufferId;
 243
 244     if(permanently)
 245       config()->requestRemoveBufferPermanently(bufferId);
 246     else
 247       config()->requestRemoveBuffer(bufferId);
 248   }
 249 }
 250
 251 void BufferView::rowsInserted(const QModelIndex & parent, int start, int end) {
 252   QTreeView::rowsInserted(parent, start, end);
 253
 254   // ensure that newly inserted network nodes are expanded per default
 255   if(parent.data(NetworkModel::ItemTypeRole) != NetworkModel::NetworkItemType)
 256     return;
 257
 258   if(model()->rowCount(parent) == 1 && parent.data(NetworkModel::ItemActiveRole) == true) {
 259     // without updating the parent the expand will have no effect... Qt Bug?
 260     update(parent);
 261     expand(parent);
 262   }
 263 }
 264
 265 void BufferView::on_configChanged() {
 266   Q_ASSERT(model());
 267
 268   // expand all active networks... collapse inactive ones... unless manually changed
 269   QModelIndex networkIdx;
 270   NetworkId networkId;
 271   for(int row = 0; row < model()->rowCount(); row++) {
 272     networkIdx = model()->index(row, 0);
 273     if(model()->rowCount(networkIdx) ==  0)
 274       continue;
 275
 276     networkId = model()->data(networkIdx, NetworkModel::NetworkIdRole).value<NetworkId>();
 277     if(!networkId.isValid())
 278       continue;
 279
 280     update(networkIdx);
 281
 282     bool expandNetwork = false;
 283     if(_expandedState.contains(networkId))
 284       expandNetwork = _expandedState[networkId];
 285     else
 286       expandNetwork = model()->data(networkIdx, NetworkModel::ItemActiveRole).toBool();
 287
 288     if(expandNetwork)
 289       expand(networkIdx);
 290     else
 291       collapse(networkIdx);
 292   }
 293
 294   // update selection to current one
 295   MappedSelectionModel *mappedSelectionModel = qobject_cast<MappedSelectionModel *>(selectionModel());
 296   if(!config() || !mappedSelectionModel)
 297     return;
 298
 299   mappedSelectionModel->mappedSetCurrentIndex(Client::bufferModel()->standardSelectionModel()->currentIndex(), QItemSelectionModel::Current);
 300   mappedSelectionModel->mappedSelect(Client::bufferModel()->standardSelectionModel()->selection(), QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
 301 }
 302
 303 void BufferView::on_collapse(const QModelIndex &index) {
 304   storeExpandedState(index.data(NetworkModel::NetworkIdRole).value<NetworkId>(), false);
 305 }
 306
 307 void BufferView::on_expand(const QModelIndex &index) {
 308   storeExpandedState(index.data(NetworkModel::NetworkIdRole).value<NetworkId>(), true);
 309 }
 310
 311 void BufferView::storeExpandedState(NetworkId networkId, bool expanded) {
 312   _expandedState[networkId] = expanded;
 313 }
 314
 315 void BufferView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight) {
 316   QTreeView::dataChanged(topLeft, bottomRight);
 317
 318   // determine how many items have been changed and if any of them is a networkitem
 319   // which just swichted from active to inactive or vice versa
 320   if(topLeft.data(NetworkModel::ItemTypeRole) != NetworkModel::NetworkItemType)
 321     return;
 322
 323   for(int i = topLeft.row(); i <= bottomRight.row(); i++) {
 324     QModelIndex networkIdx = topLeft.sibling(i, 0);
 325     if(model()->rowCount(networkIdx) == 0)
 326       continue;
 327
 328     bool isActive = networkIdx.data(NetworkModel::ItemActiveRole).toBool();
 329 #ifdef SPUTDEV
 330     if(isExpanded(networkIdx) != isActive) setExpanded(networkIdx, true);
 331 #else
 332     if(isExpanded(networkIdx) != isActive) setExpanded(networkIdx, isActive);
 333 #endif
 334   }
 335 }
 336
 337 void BufferView::toggleHeader(bool checked) {
 338   QAction *action = qobject_cast<QAction *>(sender());
 339   header()->setSectionHidden((action->property("column")).toInt(), !checked);
 340 }
 341
 342 bool BufferView::checkRequirements(const QModelIndex &index, ItemActiveStates requiredActiveState) {
 343   if(!index.isValid())
 344     return false;
 345
 346   ItemActiveStates isActive = index.data(NetworkModel::ItemActiveRole).toBool()
 347     ? ActiveState
 348     : InactiveState;
 349
 350   if(!(isActive & requiredActiveState))
 351     return false;
 352
 353   return true;
 354 }
 355
 356 void BufferView::addItemToMenu(QAction &action, QMenu &menu, const QModelIndex &index, ItemActiveStates requiredActiveState) {
 357   if(checkRequirements(index, requiredActiveState)) {
 358     menu.addAction(&action);
 359     action.setVisible(true);
 360   } else {
 361     action.setVisible(false);
 362   }
 363 }
 364
 365 void BufferView::addItemToMenu(QAction &action, QMenu &menu, bool condition) {
 366   if(condition) {
 367     menu.addAction(&action);
 368     action.setVisible(true);
 369   } else {
 370     action.setVisible(false);
 371   }
 372 }
 373
 374
 375 void BufferView::addItemToMenu(QMenu &subMenu, QMenu &menu, const QModelIndex &index, ItemActiveStates requiredActiveState) {
 376   if(checkRequirements(index, requiredActiveState)) {
 377     menu.addMenu(&subMenu);
 378     subMenu.setVisible(true);
 379   } else {
 380     subMenu.setVisible(false);
 381   }
 382 }
 383
 384 void BufferView::addSeparatorToMenu(QMenu &menu, const QModelIndex &index, ItemActiveStates requiredActiveState) {
 385   if(checkRequirements(index, requiredActiveState)) {
 386     menu.addSeparator();
 387   }
 388 }
 389
 390 QMenu *BufferView::createHideEventsSubMenu(QMenu &menu, BufferId bufferId) {
 391   int filter = BufferSettings(bufferId).messageFilter();
 392   _hideJoinAction.setChecked(filter & Message::Join);
 393   _hidePartAction.setChecked(filter & Message::Part);
 394   _hideQuitAction.setChecked(filter & Message::Quit);
 395   _hideNickAction.setChecked(filter & Message::Nick);
 396   _hideModeAction.setChecked(filter & Message::Mode);
 397   _hideDayChangeAction.setChecked(filter & Message::DayChange);
 398
 399   QMenu *hideEventsMenu = menu.addMenu(tr("Hide Events"));
 400   hideEventsMenu->addAction(&_hideJoinAction);
 401   hideEventsMenu->addAction(&_hidePartAction);
 402   hideEventsMenu->addAction(&_hideQuitAction);
 403   hideEventsMenu->addAction(&_hideNickAction);
 404   hideEventsMenu->addAction(&_hideModeAction);
 405   hideEventsMenu->addAction(&_hideDayChangeAction);
 406   return hideEventsMenu;
 407 }
 408
 409 void BufferView::contextMenuEvent(QContextMenuEvent *event) {
 410   QModelIndex index = indexAt(event->pos());
 411   if(!index.isValid())
 412     index = rootIndex();
 413   if(!index.isValid())
 414     return;
 415
 416   const Network *network = Client::network(index.data(NetworkModel::NetworkIdRole).value<NetworkId>());
 417   Q_CHECK_PTR(network);
 418
 419   QPixmap connectionStateIcon;
 420   if(network) {
 421     if(network->connectionState() == Network::Initialized) {
 422       connectionStateIcon = SmallIcon("network-connect");
 423     } else if(network->connectionState() == Network::Disconnected) {
 424       connectionStateIcon = SmallIcon("network-disconnect");
 425     } else {
 426       connectionStateIcon = SmallIcon("network-wired");  // FIXME network-connecting
 427     }
 428   }
 429
 430   QMenu contextMenu(this);
 431   NetworkModel::itemType itemType = static_cast<NetworkModel::itemType>(index.data(NetworkModel::ItemTypeRole).toInt());
 432
 433   switch(itemType) {
 434   case NetworkModel::NetworkItemType:
 435     showChannelList.setData(index.data(NetworkModel::NetworkIdRole));
 436     _disconnectNetAction.setIcon(connectionStateIcon);
 437     _connectNetAction.setIcon(connectionStateIcon);
 438     addItemToMenu(showChannelList, contextMenu, index, ActiveState);
 439     addItemToMenu(_disconnectNetAction, contextMenu, network->connectionState() != Network::Disconnected);
 440     addItemToMenu(_connectNetAction, contextMenu, network->connectionState() == Network::Disconnected);
 441     addSeparatorToMenu(contextMenu, index, ActiveState);
 442     addItemToMenu(_joinChannelAction, contextMenu, index, ActiveState);
 443     break;
 444   case NetworkModel::BufferItemType:
 445     {
 446       BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
 447       switch(bufferInfo.type()) {
 448       case BufferInfo::ChannelBuffer:
 449         addItemToMenu(_joinBufferAction, contextMenu, index, InactiveState);
 450         addItemToMenu(_partBufferAction, contextMenu, index, ActiveState);
 451         addItemToMenu(_hideBufferTemporarilyAction, contextMenu, (bool)config());
 452         addItemToMenu(_hideBufferPermanentlyAction, contextMenu, (bool)config());
 453         addItemToMenu(_removeBufferAction, contextMenu, index, InactiveState);
 454         createHideEventsSubMenu(contextMenu, bufferInfo.bufferId());
 455         addItemToMenu(_ignoreListAction, contextMenu);
 456         break;
 457       case BufferInfo::QueryBuffer:
 458         addItemToMenu(_hideBufferTemporarilyAction, contextMenu, (bool)config());
 459         addItemToMenu(_hideBufferPermanentlyAction, contextMenu, (bool)config());
 460         addItemToMenu(_removeBufferAction, contextMenu);
 461         createHideEventsSubMenu(contextMenu, bufferInfo.bufferId());
 462         break;
 463       default:
 464         addItemToMenu(_hideBufferTemporarilyAction, contextMenu, (bool)config());
 465         addItemToMenu(_hideBufferPermanentlyAction, contextMenu, (bool)config());
 466         break;
 467       }
 468     }
 469     break;
 470   default:
 471     return;
 472   }
 473
 474   if(contextMenu.actions().isEmpty())
 475     return;
 476   QAction *result = contextMenu.exec(QCursor::pos());
 477
 478   // Handle Result
 479   if(network && result == &_connectNetAction) {
 480     network->requestConnect();
 481     return;
 482   }
 483
 484   if(network && result == &_disconnectNetAction) {
 485     network->requestDisconnect();
 486     return;
 487   }
 488
 489   if(result == &_joinChannelAction) {
 490     // FIXME no QInputDialog in Qtopia
 491 #ifndef Q_WS_QWS
 492     bool ok;
 493     QString channelName = QInputDialog::getText(this, tr("Join Channel"), tr("Input channel name:"), QLineEdit::Normal, QString(), &ok);
 494     if(ok && !channelName.isEmpty()) {
 495       Client::instance()->userInput(BufferInfo::fakeStatusBuffer(index.data(NetworkModel::NetworkIdRole).value<NetworkId>()), QString("/J %1").arg(channelName));
 496     }
 497 #endif
 498     return;
 499   }
 500
 501   if(result == &_joinBufferAction) {
 502     BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
 503     Client::instance()->userInput(bufferInfo, QString("/JOIN %1").arg(bufferInfo.bufferName()));
 504     return;
 505   }
 506
 507   if(result == &_partBufferAction) {
 508     BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
 509     Client::instance()->userInput(bufferInfo, QString("/PART"));
 510     return;
 511   }
 512
 513   if(result == &_hideBufferTemporarilyAction) {
 514     removeSelectedBuffers();
 515     return;
 516   }
 517
 518   if(result == &_hideBufferPermanentlyAction) {
 519     removeSelectedBuffers(true);
 520     return;
 521   }
 522
 523   if(result == &_removeBufferAction) {
 524     BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
 525     int res = QMessageBox::question(this, tr("Remove buffer permanently?"),
 526                                     tr("Do you want to delete the buffer \"%1\" permanently? This will delete all related data, including all backlog "
 527                                        "data, from the core's database!").arg(bufferInfo.bufferName()),
 528                                         QMessageBox::Yes|QMessageBox::No, QMessageBox::No);
 529     if(res == QMessageBox::Yes) {
 530       Client::removeBuffer(bufferInfo.bufferId());
 531     }
 532     return;
 533   }
 534
 535   if(result == & _hideJoinAction) {
 536     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 537     BufferSettings(bufferId).filterMessage(Message::Join, _hideJoinAction.isChecked());
 538     return;
 539   }
 540   if(result == &_hidePartAction) {
 541     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 542     BufferSettings(bufferId).filterMessage(Message::Part, _hidePartAction.isChecked());
 543     return;
 544   }
 545   if(result == &_hideQuitAction) {
 546     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 547     BufferSettings(bufferId).filterMessage(Message::Quit, _hideQuitAction.isChecked());
 548     return;
 549   }
 550   if(result == &_hideNickAction) {
 551     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 552     BufferSettings(bufferId).filterMessage(Message::Nick, _hideNickAction.isChecked());
 553     return;
 554   }
 555   if(result == &_hideModeAction) {
 556     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 557     BufferSettings(bufferId).filterMessage(Message::Mode, _hideModeAction.isChecked());
 558     return;
 559   }
 560   if(result == &_hideDayChangeAction) {
 561     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 562     BufferSettings(bufferId).filterMessage(Message::DayChange, _hideDayChangeAction.isChecked());
 563     return;
 564   }
 565 }
 566
 567 void BufferView::wheelEvent(QWheelEvent* event) {
 568   if(UiSettings().value("MouseWheelChangesBuffers", QVariant(true)).toBool() == (bool)(event->modifiers() & Qt::AltModifier))
 569     return QTreeView::wheelEvent(event);
 570
 571   int rowDelta = ( event->delta() > 0 ) ? -1 : 1;
 572   QModelIndex currentIndex = selectionModel()->currentIndex();
 573   QModelIndex resultingIndex;
 574   if( model()->hasIndex(  currentIndex.row() + rowDelta, currentIndex.column(), currentIndex.parent() ) )
 575     {
 576       resultingIndex = currentIndex.sibling( currentIndex.row() + rowDelta, currentIndex.column() );
 577     }
 578     else //if we scroll into a the parent node...
 579       {
 580         QModelIndex parent = currentIndex.parent();
 581         QModelIndex aunt = parent.sibling( parent.row() + rowDelta, parent.column() );
 582         if( rowDelta == -1 )
 583           resultingIndex = aunt.child( model()->rowCount( aunt ) - 1, 0 );
 584         else
 585           resultingIndex = aunt.child( 0, 0 );
 586         if( !resultingIndex.isValid() )
 587           return;
 588       }
 589   selectionModel()->setCurrentIndex( resultingIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows );
 590   selectionModel()->select( resultingIndex, QItemSelectionModel::ClearAndSelect );
 591
 592 }
 593
 594
 595 QSize BufferView::sizeHint() const {
 596   return QTreeView::sizeHint();
 597
 598   if(!model())
 599     return QTreeView::sizeHint();
 600
 601   if(model()->rowCount() == 0)
 602     return QSize(120, 50);
 603
 604   int columnSize = 0;
 605   for(int i = 0; i < model()->columnCount(); i++) {
 606     if(!isColumnHidden(i))
 607       columnSize += sizeHintForColumn(i);
 608   }
 609   return QSize(columnSize, 50);
 610 }
 611
 612 // ==============================
 613 //  BufferView Dock
 614 // ==============================
 615 BufferViewDock::BufferViewDock(BufferViewConfig *config, QWidget *parent)
 616   : QDockWidget(config->bufferViewName(), parent)
 617 {
 618   setObjectName("BufferViewDock-" + QString::number(config->bufferViewId()));
 619   toggleViewAction()->setData(config->bufferViewId());
 620   setAllowedAreas(Qt::RightDockWidgetArea|Qt::LeftDockWidgetArea);
 621   connect(config, SIGNAL(bufferViewNameSet(const QString &)), this, SLOT(bufferViewRenamed(const QString &)));
 622 }
 623
 624 BufferViewDock::BufferViewDock(QWidget *parent)
 625   : QDockWidget(tr("All Buffers"), parent)
 626 {
 627   setObjectName("BufferViewDock--1");
 628   toggleViewAction()->setData((int)-1);
 629   setAllowedAreas(Qt::RightDockWidgetArea|Qt::LeftDockWidgetArea);
 630 }
 631
 632 void BufferViewDock::bufferViewRenamed(const QString &newName) {
 633   setWindowTitle(newName);
 634   toggleViewAction()->setText(newName);
 635 }