src/uisupport/bufferview.cpp

   1 /***************************************************************************
   2  *   Copyright (C) 2005-2016 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  *   51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.         *
  19  ***************************************************************************/
  20
  21 #include "bufferview.h"
  22
  23 #include <QApplication>
  24 #include <QAction>
  25 #include <QFlags>
  26 #include <QHeaderView>
  27 #include <QLineEdit>
  28 #include <QMenu>
  29 #include <QMessageBox>
  30 #include <QSet>
  31 #include <QVBoxLayout>
  32
  33 #include "action.h"
  34 #include "buffermodel.h"
  35 #include "bufferviewfilter.h"
  36 #include "buffersettings.h"
  37 #include "buffersyncer.h"
  38 #include "client.h"
  39 #include "contextmenuactionprovider.h"
  40 #include "graphicalui.h"
  41 #include "network.h"
  42 #include "networkmodel.h"
  43 #include "contextmenuactionprovider.h"
  44
  45 /*****************************************
  46 * The TreeView showing the Buffers
  47 *****************************************/
  48 // Please be carefull when reimplementing methods which are used to inform the view about changes to the data
  49 // to be on the safe side: call QTreeView's method aswell (or TreeViewTouch's)
  50 BufferView::BufferView(QWidget *parent)
  51     : TreeViewTouch(parent)
  52 {
  53     connect(this, SIGNAL(collapsed(const QModelIndex &)), SLOT(storeExpandedState(const QModelIndex &)));
  54     connect(this, SIGNAL(expanded(const QModelIndex &)), SLOT(storeExpandedState(const QModelIndex &)));
  55
  56     setSelectionMode(QAbstractItemView::ExtendedSelection);
  57
  58     QAbstractItemDelegate *oldDelegate = itemDelegate();
  59     BufferViewDelegate *tristateDelegate = new BufferViewDelegate(this);
  60     setItemDelegate(tristateDelegate);
  61     delete oldDelegate;
  62 }
  63
  64
  65 void BufferView::init()
  66 {
  67     header()->setContextMenuPolicy(Qt::ActionsContextMenu);
  68     hideColumn(1);
  69     hideColumn(2);
  70     setIndentation(10);
  71
  72     // New entries will be expanded automatically when added; no need to call expandAll()
  73
  74     header()->hide(); // nobody seems to use this anyway
  75
  76     // breaks with Qt 4.8
  77     if (QString("4.8.0") > qVersion()) // FIXME breaks with Qt versions >= 4.10!
  78         setAnimated(true);
  79
  80     // FIXME This is to workaround bug #663
  81     setUniformRowHeights(true);
  82
  83 #ifndef QT_NO_DRAGANDDROP
  84     setDragEnabled(true);
  85     setAcceptDrops(true);
  86     setDropIndicatorShown(true);
  87 #endif
  88
  89     setSortingEnabled(true);
  90     sortByColumn(0, Qt::AscendingOrder);
  91
  92     // activated() fails on X11 and Qtopia at least
  93 #if defined Q_WS_QWS || defined Q_WS_X11
  94     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(joinChannel(QModelIndex)));
  95     connect(this, SIGNAL(doubleClicked(QModelIndex)), SLOT(joinChannel(QModelIndex)));
  96 #else
  97     // afaik this is better on Mac and Windows
  98     disconnect(this, SIGNAL(activated(QModelIndex)), this, SLOT(joinChannel(QModelIndex)));
  99     connect(this, SIGNAL(activated(QModelIndex)), SLOT(joinChannel(QModelIndex)));
 100 #endif
 101 }
 102
 103
 104 void BufferView::setModel(QAbstractItemModel *model)
 105 {
 106     delete selectionModel();
 107
 108     TreeViewTouch::setModel(model);
 109     init();
 110     // remove old Actions
 111     QList<QAction *> oldactions = header()->actions();
 112     foreach(QAction *action, oldactions) {
 113         header()->removeAction(action);
 114         action->deleteLater();
 115     }
 116
 117     if (!model)
 118         return;
 119
 120     QString sectionName;
 121     QAction *showSection;
 122     for (int i = 1; i < model->columnCount(); i++) {
 123         sectionName = (model->headerData(i, Qt::Horizontal, Qt::DisplayRole)).toString();
 124         showSection = new QAction(sectionName, header());
 125         showSection->setCheckable(true);
 126         showSection->setChecked(!isColumnHidden(i));
 127         showSection->setProperty("column", i);
 128         connect(showSection, SIGNAL(toggled(bool)), this, SLOT(toggleHeader(bool)));
 129         header()->addAction(showSection);
 130     }
 131
 132     connect(model, SIGNAL(layoutChanged()), this, SLOT(on_layoutChanged()));
 133 }
 134
 135
 136 void BufferView::setFilteredModel(QAbstractItemModel *model_, BufferViewConfig *config)
 137 {
 138     BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
 139     if (filter) {
 140         filter->setConfig(config);
 141         setConfig(config);
 142         return;
 143     }
 144
 145     if (model()) {
 146         disconnect(this, 0, model(), 0);
 147         disconnect(model(), 0, this, 0);
 148     }
 149
 150     if (!model_) {
 151         setModel(model_);
 152     }
 153     else {
 154         BufferViewFilter *filter = new BufferViewFilter(model_, config);
 155         setModel(filter);
 156         connect(filter, SIGNAL(configChanged()), this, SLOT(on_configChanged()));
 157     }
 158     setConfig(config);
 159 }
 160
 161
 162 void BufferView::setConfig(BufferViewConfig *config)
 163 {
 164     if (_config == config)
 165         return;
 166
 167     if (_config) {
 168         disconnect(_config, 0, this, 0);
 169     }
 170
 171     _config = config;
 172     if (config) {
 173         connect(config, SIGNAL(networkIdSet(const NetworkId &)), this, SLOT(setRootIndexForNetworkId(const NetworkId &)));
 174         setRootIndexForNetworkId(config->networkId());
 175     }
 176     else {
 177         setIndentation(10);
 178         setRootIndex(QModelIndex());
 179     }
 180 }
 181
 182
 183 void BufferView::setRootIndexForNetworkId(const NetworkId &networkId)
 184 {
 185     if (!networkId.isValid() || !model()) {
 186         setIndentation(10);
 187         setRootIndex(QModelIndex());
 188     }
 189     else {
 190         setIndentation(5);
 191         int networkCount = model()->rowCount();
 192         QModelIndex child;
 193         for (int i = 0; i < networkCount; i++) {
 194             child = model()->index(i, 0);
 195             if (networkId == model()->data(child, NetworkModel::NetworkIdRole).value<NetworkId>())
 196                 setRootIndex(child);
 197         }
 198     }
 199 }
 200
 201
 202 void BufferView::joinChannel(const QModelIndex &index)
 203 {
 204     BufferInfo::Type bufferType = (BufferInfo::Type)index.data(NetworkModel::BufferTypeRole).value<int>();
 205
 206     if (bufferType != BufferInfo::ChannelBuffer)
 207         return;
 208
 209     BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
 210
 211     Client::userInput(bufferInfo, QString("/JOIN %1").arg(bufferInfo.bufferName()));
 212 }
 213
 214
 215 void BufferView::keyPressEvent(QKeyEvent *event)
 216 {
 217     if (event->key() == Qt::Key_Backspace || event->key() == Qt::Key_Delete) {
 218         event->accept();
 219         removeSelectedBuffers();
 220     }
 221     TreeViewTouch::keyPressEvent(event);
 222 }
 223
 224
 225 void BufferView::dropEvent(QDropEvent *event)
 226 {
 227     QModelIndex index = indexAt(event->pos());
 228
 229     QRect indexRect = visualRect(index);
 230     QPoint cursorPos = event->pos();
 231
 232     // check if we're really _on_ the item and not indicating a move to just above or below the item
 233     // Magic margin number for this is from QAbstractItemViewPrivate::position()
 234     const int margin = 2;
 235     if (cursorPos.y() - indexRect.top() < margin
 236         || indexRect.bottom() - cursorPos.y() < margin)
 237         return TreeViewTouch::dropEvent(event);
 238
 239     // If more than one buffer was being dragged, treat this as a rearrangement instead of a merge request
 240     QList<QPair<NetworkId, BufferId> > bufferList = Client::networkModel()->mimeDataToBufferList(event->mimeData());
 241     if (bufferList.count() != 1)
 242         return TreeViewTouch::dropEvent(event);
 243
 244     // Get the Buffer ID of the buffer that was being dragged
 245     BufferId bufferId2 = bufferList[0].second;
 246
 247     // Get the Buffer ID of the target buffer
 248     BufferId bufferId1 = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 249
 250     // If the source and target are the same buffer, this was an aborted rearrangement
 251     if (bufferId1 == bufferId2)
 252         return TreeViewTouch::dropEvent(event);
 253
 254     // Get index of buffer that was being dragged
 255     QModelIndex index2 = Client::networkModel()->bufferIndex(bufferId2);
 256
 257     // If the buffer being dragged is a channel and we're still joined to it, treat this as a rearrangement
 258     // This prevents us from being joined to a channel with no associated UI elements
 259     if (index2.data(NetworkModel::BufferTypeRole) == BufferInfo::ChannelBuffer && index2.data(NetworkModel::ItemActiveRole) == true)
 260         return TreeViewTouch::dropEvent(event);
 261
 262     //If the source buffer is not mergeable(AKA not a Channel and not a Query), try rearranging instead
 263     if (index2.data(NetworkModel::BufferTypeRole) != BufferInfo::ChannelBuffer && index2.data(NetworkModel::BufferTypeRole) != BufferInfo::QueryBuffer)
 264         return TreeViewTouch::dropEvent(event);
 265
 266     // If the target buffer is not mergeable(AKA not a Channel and not a Query), try rearranging instead
 267     if (index.data(NetworkModel::BufferTypeRole) != BufferInfo::ChannelBuffer && index.data(NetworkModel::BufferTypeRole) != BufferInfo::QueryBuffer)
 268         return TreeViewTouch::dropEvent(event);
 269
 270     // Confirm that the user really wants to merge the buffers before doing so
 271     int res = QMessageBox::question(0, tr("Merge buffers permanently?"),
 272         tr("Do you want to merge the buffer \"%1\" permanently into buffer \"%2\"?\n This cannot be reversed!").arg(Client::networkModel()->bufferName(bufferId2)).arg(Client::networkModel()->bufferName(bufferId1)),
 273         QMessageBox::Yes|QMessageBox::No, QMessageBox::No);
 274     if (res == QMessageBox::Yes) {
 275         Client::mergeBuffersPermanently(bufferId1, bufferId2);
 276     }
 277 }
 278
 279
 280 void BufferView::removeSelectedBuffers(bool permanently)
 281 {
 282     if (!config())
 283         return;
 284
 285     BufferId bufferId;
 286     QSet<BufferId> removedRows;
 287     foreach(QModelIndex index, selectionModel()->selectedIndexes()) {
 288         if (index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
 289             continue;
 290
 291         bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 292         if (removedRows.contains(bufferId))
 293             continue;
 294
 295         removedRows << bufferId;
 296     }
 297
 298     foreach(BufferId bufferId, removedRows) {
 299         if (permanently)
 300             config()->requestRemoveBufferPermanently(bufferId);
 301         else
 302             config()->requestRemoveBuffer(bufferId);
 303     }
 304 }
 305
 306
 307 void BufferView::rowsInserted(const QModelIndex &parent, int start, int end)
 308 {
 309     TreeViewTouch::rowsInserted(parent, start, end);
 310
 311     // ensure that newly inserted network nodes are expanded per default
 312     if (parent.data(NetworkModel::ItemTypeRole) != NetworkModel::NetworkItemType)
 313         return;
 314
 315     setExpandedState(parent);
 316 }
 317
 318
 319 void BufferView::on_layoutChanged()
 320 {
 321     int numNets = model()->rowCount(QModelIndex());
 322     for (int row = 0; row < numNets; row++) {
 323         QModelIndex networkIdx = model()->index(row, 0, QModelIndex());
 324         setExpandedState(networkIdx);
 325     }
 326 }
 327
 328
 329 void BufferView::on_configChanged()
 330 {
 331     Q_ASSERT(model());
 332
 333     // expand all active networks... collapse inactive ones... unless manually changed
 334     QModelIndex networkIdx;
 335     NetworkId networkId;
 336     for (int row = 0; row < model()->rowCount(); row++) {
 337         networkIdx = model()->index(row, 0);
 338         if (model()->rowCount(networkIdx) ==  0)
 339             continue;
 340
 341         networkId = model()->data(networkIdx, NetworkModel::NetworkIdRole).value<NetworkId>();
 342         if (!networkId.isValid())
 343             continue;
 344
 345         setExpandedState(networkIdx);
 346     }
 347
 348     if (config()) {
 349         // update selection to current one
 350         Client::bufferModel()->synchronizeView(this);
 351     }
 352 }
 353
 354
 355 void BufferView::storeExpandedState(const QModelIndex &networkIdx)
 356 {
 357     NetworkId networkId = model()->data(networkIdx, NetworkModel::NetworkIdRole).value<NetworkId>();
 358
 359     int oldState = 0;
 360     if (isExpanded(networkIdx))
 361         oldState |= WasExpanded;
 362     if (model()->data(networkIdx, NetworkModel::ItemActiveRole).toBool())
 363         oldState |= WasActive;
 364
 365     _expandedState[networkId] = oldState;
 366 }
 367
 368
 369 void BufferView::setExpandedState(const QModelIndex &networkIdx)
 370 {
 371     if (model()->data(networkIdx, NetworkModel::ItemTypeRole) != NetworkModel::NetworkItemType)
 372         return;
 373
 374     if (model()->rowCount(networkIdx) == 0)
 375         return;
 376
 377     NetworkId networkId = model()->data(networkIdx, NetworkModel::NetworkIdRole).value<NetworkId>();
 378
 379     bool networkActive = model()->data(networkIdx, NetworkModel::ItemActiveRole).toBool();
 380     bool expandNetwork = networkActive;
 381     if (_expandedState.contains(networkId)) {
 382         int oldState = _expandedState[networkId];
 383         if ((bool)(oldState & WasActive) == networkActive)
 384             expandNetwork = (bool)(oldState & WasExpanded);
 385     }
 386
 387     if (expandNetwork != isExpanded(networkIdx)) {
 388         update(networkIdx);
 389         setExpanded(networkIdx, expandNetwork);
 390     }
 391     storeExpandedState(networkIdx); // this call is needed to keep track of the isActive state
 392 }
 393
 394 #if QT_VERSION < 0x050000
 395 void BufferView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
 396 {
 397     TreeViewTouch::dataChanged(topLeft, bottomRight);
 398 #else
 399 void BufferView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles)
 400 {
 401     TreeViewTouch::dataChanged(topLeft, bottomRight, roles);
 402 #endif
 403
 404     // determine how many items have been changed and if any of them is a networkitem
 405     // which just swichted from active to inactive or vice versa
 406     if (topLeft.data(NetworkModel::ItemTypeRole) != NetworkModel::NetworkItemType)
 407         return;
 408
 409     for (int i = topLeft.row(); i <= bottomRight.row(); i++) {
 410         QModelIndex networkIdx = topLeft.sibling(i, 0);
 411         setExpandedState(networkIdx);
 412     }
 413 }
 414
 415
 416 void BufferView::toggleHeader(bool checked)
 417 {
 418     QAction *action = qobject_cast<QAction *>(sender());
 419     header()->setSectionHidden((action->property("column")).toInt(), !checked);
 420 }
 421
 422
 423 void BufferView::contextMenuEvent(QContextMenuEvent *event)
 424 {
 425     QModelIndex index = indexAt(event->pos());
 426     if (!index.isValid())
 427         index = rootIndex();
 428
 429     QMenu contextMenu(this);
 430
 431     if (index.isValid()) {
 432         addActionsToMenu(&contextMenu, index);
 433     }
 434
 435     addFilterActions(&contextMenu, index);
 436
 437     if (!contextMenu.actions().isEmpty())
 438         contextMenu.exec(QCursor::pos());
 439 }
 440
 441
 442 void BufferView::addActionsToMenu(QMenu *contextMenu, const QModelIndex &index)
 443 {
 444     QModelIndexList indexList = selectedIndexes();
 445     // make sure the item we clicked on is first
 446     indexList.removeAll(index);
 447     indexList.prepend(index);
 448
 449     GraphicalUi::contextMenuActionProvider()->addActions(contextMenu, indexList, this, "menuActionTriggered", (bool)config());
 450 }
 451
 452
 453 void BufferView::addFilterActions(QMenu *contextMenu, const QModelIndex &index)
 454 {
 455     BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
 456     if (filter) {
 457         QList<QAction *> filterActions = filter->actions(index);
 458         if (!filterActions.isEmpty()) {
 459             contextMenu->addSeparator();
 460             foreach(QAction *action, filterActions) {
 461                 contextMenu->addAction(action);
 462             }
 463         }
 464     }
 465 }
 466
 467
 468 void BufferView::menuActionTriggered(QAction *result)
 469 {
 470     ContextMenuActionProvider::ActionType type = (ContextMenuActionProvider::ActionType)result->data().toInt();
 471     switch (type) {
 472     case ContextMenuActionProvider::HideBufferTemporarily:
 473         removeSelectedBuffers();
 474         break;
 475     case ContextMenuActionProvider::HideBufferPermanently:
 476         removeSelectedBuffers(true);
 477         break;
 478     default:
 479         return;
 480     }
 481 }
 482
 483
 484 void BufferView::nextBuffer()
 485 {
 486     changeBuffer(Forward);
 487 }
 488
 489
 490 void BufferView::previousBuffer()
 491 {
 492     changeBuffer(Backward);
 493 }
 494
 495
 496 void BufferView::changeBuffer(Direction direction)
 497 {
 498     QModelIndex currentIndex = selectionModel()->currentIndex();
 499     QModelIndex resultingIndex;
 500
 501     if (currentIndex.parent().isValid()) {
 502         //If we are a child node just switch among siblings unless it's the first/last child
 503         resultingIndex = currentIndex.sibling(currentIndex.row() + direction, 0);
 504
 505         if (!resultingIndex.isValid()) {
 506             QModelIndex parent = currentIndex.parent();
 507             if (direction == Backward)
 508                 resultingIndex = parent;
 509             else
 510                 resultingIndex = parent.sibling(parent.row() + direction, 0);
 511         }
 512     }
 513     else {
 514         //If we have a toplevel node, try and get an adjacent child
 515         if (direction == Backward) {
 516             QModelIndex newParent = currentIndex.sibling(currentIndex.row() - 1, 0);
 517             if (model()->hasChildren(newParent))
 518                 resultingIndex = newParent.child(model()->rowCount(newParent) - 1, 0);
 519             else
 520                 resultingIndex = newParent;
 521         }
 522         else {
 523             if (model()->hasChildren(currentIndex))
 524                 resultingIndex = currentIndex.child(0, 0);
 525             else
 526                 resultingIndex = currentIndex.sibling(currentIndex.row() + 1, 0);
 527         }
 528     }
 529
 530     if (!resultingIndex.isValid())
 531         return;
 532
 533     selectionModel()->setCurrentIndex(resultingIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
 534     selectionModel()->select(resultingIndex, QItemSelectionModel::ClearAndSelect);
 535 }
 536
 537 void BufferView::selectFirstBuffer()
 538 {
 539     int networksCount = model()->rowCount(QModelIndex());
 540     if (networksCount == 0) {
 541         return;
 542     }
 543
 544     QModelIndex bufferIndex;
 545     for (int row = 0; row < networksCount; row++) {
 546         QModelIndex networkIndex = model()->index(row, 0, QModelIndex());
 547         int childCount = model()->rowCount(networkIndex);
 548         if (childCount > 0) {
 549             bufferIndex = model()->index(0, 0, networkIndex);
 550             break;
 551         }
 552     }
 553
 554     if (!bufferIndex.isValid()) {
 555         return;
 556     }
 557
 558     selectionModel()->setCurrentIndex(bufferIndex, QItemSelectionModel::ClearAndSelect | QItemSelectionModel::Rows);
 559     selectionModel()->select(bufferIndex, QItemSelectionModel::ClearAndSelect);
 560 }
 561
 562 void BufferView::wheelEvent(QWheelEvent *event)
 563 {
 564     if (ItemViewSettings().mouseWheelChangesBuffer() == (bool)(event->modifiers() & Qt::AltModifier))
 565         return TreeViewTouch::wheelEvent(event);
 566
 567     int rowDelta = (event->delta() > 0) ? -1 : 1;
 568     changeBuffer((Direction)rowDelta);
 569 }
 570
 571
 572 void BufferView::hideCurrentBuffer()
 573 {
 574     QModelIndex index = selectionModel()->currentIndex();
 575     if (index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
 576         return;
 577
 578     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
 579
 580     //The check above means we won't be looking at a network, which should always be the first row, so we can just go backwards.
 581     changeBuffer(Backward);
 582
 583     /*if(removedRows.contains(bufferId))
 584       continue;
 585
 586     removedRows << bufferId;*/
 587     /*if(permanently)
 588       config()->requestRemoveBufferPermanently(bufferId);
 589     else*/
 590     config()->requestRemoveBuffer(bufferId);
 591 }
 592
 593 void BufferView::filterTextChanged(QString filterString)
 594 {
 595     BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
 596     if (!filter) {
 597         return;
 598     }
 599     filter->setFilterString(filterString);
 600     on_configChanged(); // make sure collapsation is correct
 601 }
 602
 603
 604 QSize BufferView::sizeHint() const
 605 {
 606     return TreeViewTouch::sizeHint();
 607
 608     if (!model())
 609         return TreeViewTouch::sizeHint();
 610
 611     if (model()->rowCount() == 0)
 612         return QSize(120, 50);
 613
 614     int columnSize = 0;
 615     for (int i = 0; i < model()->columnCount(); i++) {
 616         if (!isColumnHidden(i))
 617             columnSize += sizeHintForColumn(i);
 618     }
 619     return QSize(columnSize, 50);
 620 }
 621
 622
 623 // ****************************************
 624 //  BufferViewDelgate
 625 // ****************************************
 626 class ColorsChangedEvent : public QEvent
 627 {
 628 public:
 629     ColorsChangedEvent() : QEvent(QEvent::User) {};
 630 };
 631
 632
 633 BufferViewDelegate::BufferViewDelegate(QObject *parent)
 634     : QStyledItemDelegate(parent)
 635 {
 636 }
 637
 638
 639 void BufferViewDelegate::customEvent(QEvent *event)
 640 {
 641     if (event->type() != QEvent::User)
 642         return;
 643
 644     event->accept();
 645 }
 646
 647
 648 bool BufferViewDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
 649 {
 650     if (event->type() != QEvent::MouseButtonRelease)
 651         return QStyledItemDelegate::editorEvent(event, model, option, index);
 652
 653     if (!(model->flags(index) & Qt::ItemIsUserCheckable))
 654         return QStyledItemDelegate::editorEvent(event, model, option, index);
 655
 656     QVariant value = index.data(Qt::CheckStateRole);
 657     if (!value.isValid())
 658         return QStyledItemDelegate::editorEvent(event, model, option, index);
 659
 660     QStyleOptionViewItemV4 viewOpt(option);
 661     initStyleOption(&viewOpt, index);
 662
 663     QRect checkRect = viewOpt.widget->style()->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &viewOpt, viewOpt.widget);
 664     QMouseEvent *me = static_cast<QMouseEvent *>(event);
 665
 666     if (me->button() != Qt::LeftButton || !checkRect.contains(me->pos()))
 667         return QStyledItemDelegate::editorEvent(event, model, option, index);
 668
 669     Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt());
 670     if (state == Qt::Unchecked)
 671         state = Qt::PartiallyChecked;
 672     else if (state == Qt::PartiallyChecked)
 673         state = Qt::Checked;
 674     else
 675         state = Qt::Unchecked;
 676     model->setData(index, state, Qt::CheckStateRole);
 677     return true;
 678 }
 679
 680
 681 // ==============================
 682 //  BufferView Dock
 683 // ==============================
 684 BufferViewDock::BufferViewDock(BufferViewConfig *config, QWidget *parent)
 685     : QDockWidget(parent),
 686     _childWidget(0),
 687     _widget(new QWidget(parent)),
 688     _filterEdit(new QLineEdit(parent)),
 689     _active(false),
 690     _title(config->bufferViewName())
 691 {
 692     setObjectName("BufferViewDock-" + QString::number(config->bufferViewId()));
 693     toggleViewAction()->setData(config->bufferViewId());
 694     setAllowedAreas(Qt::RightDockWidgetArea|Qt::LeftDockWidgetArea);
 695     connect(config, SIGNAL(bufferViewNameSet(const QString &)), this, SLOT(bufferViewRenamed(const QString &)));
 696     connect(config, SIGNAL(configChanged()), SLOT(configChanged()));
 697     updateTitle();
 698
 699     _widget->setLayout(new QVBoxLayout);
 700     _widget->layout()->setSpacing(0);
 701     _widget->layout()->setContentsMargins(0, 0, 0, 0);
 702
 703     // We need to potentially hide it early, so it doesn't flicker
 704     _filterEdit->setVisible(config->showSearch());
 705     _filterEdit->setFocusPolicy(Qt::ClickFocus);
 706     _filterEdit->installEventFilter(this);
 707     _filterEdit->setPlaceholderText(tr("Search..."));
 708     connect(_filterEdit, SIGNAL(returnPressed()), SLOT(onFilterReturnPressed()));
 709
 710     _widget->layout()->addWidget(_filterEdit);
 711     QDockWidget::setWidget(_widget);
 712 }
 713
 714
 715 void BufferViewDock::updateTitle()
 716 {
 717     QString title = _title;
 718     if (isActive())
 719         title.prepend(QString::fromUtf8("• "));
 720     setWindowTitle(title);
 721 }
 722
 723 void BufferViewDock::configChanged()
 724 {
 725     if (_filterEdit->isVisible() != config()->showSearch()) {
 726         _filterEdit->setVisible(config()->showSearch());
 727         _filterEdit->clear();
 728     }
 729 }
 730
 731 void BufferViewDock::onFilterReturnPressed()
 732 {
 733     if (_oldFocusItem) {
 734         _oldFocusItem->setFocus();
 735         _oldFocusItem = 0;
 736     }
 737
 738     if (!config()->showSearch()) {
 739         _filterEdit->setVisible(false);
 740     }
 741
 742     BufferView *view = bufferView();
 743     if (!view || _filterEdit->text().isEmpty()) {
 744         return;
 745     }
 746
 747     view->selectFirstBuffer();
 748     _filterEdit->clear();
 749 }
 750
 751 void BufferViewDock::setActive(bool active)
 752 {
 753     if (active != isActive()) {
 754         _active = active;
 755         updateTitle();
 756         if (active) {
 757             raise();  // for tabbed docks
 758         }
 759     }
 760 }
 761
 762 bool BufferViewDock::eventFilter(QObject *object, QEvent *event)
 763 {
 764    if (object != _filterEdit)  {
 765        return false;
 766    }
 767
 768    if (event->type() == QEvent::FocusOut) {
 769        if (!config()->showSearch() && _filterEdit->text().isEmpty()) {
 770            _filterEdit->setVisible(false);
 771            return true;
 772        }
 773    } else if (event->type() == QEvent::KeyRelease) {
 774        QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
 775        if (keyEvent->key() != Qt::Key_Escape) {
 776            return false;
 777        }
 778
 779        _filterEdit->clear();
 780
 781        if (_oldFocusItem) {
 782            _oldFocusItem->setFocus();
 783            _oldFocusItem = 0;
 784        }
 785
 786        return true;
 787    }
 788
 789    return false;
 790 }
 791
 792 void BufferViewDock::bufferViewRenamed(const QString &newName)
 793 {
 794     _title = newName;
 795     updateTitle();
 796     toggleViewAction()->setText(newName);
 797 }
 798
 799
 800 int BufferViewDock::bufferViewId() const
 801 {
 802     BufferView *view = bufferView();
 803     if (!view)
 804         return 0;
 805
 806     if (view->config())
 807         return view->config()->bufferViewId();
 808     else
 809         return 0;
 810 }
 811
 812
 813 BufferViewConfig *BufferViewDock::config() const
 814 {
 815     BufferView *view = bufferView();
 816     if (!view)
 817         return 0;
 818     else
 819         return view->config();
 820 }
 821
 822 void BufferViewDock::setWidget(QWidget *newWidget)
 823 {
 824     _widget->layout()->addWidget(newWidget);
 825     _childWidget = newWidget;
 826
 827     connect(_filterEdit, SIGNAL(textChanged(QString)), bufferView(), SLOT(filterTextChanged(QString)));
 828 }
 829
 830 void BufferViewDock::activateFilter()
 831 {
 832     if (!_filterEdit->isVisible()) {
 833         _filterEdit->setVisible(true);
 834     }
 835
 836     _oldFocusItem = qApp->focusWidget();
 837
 838     _filterEdit->setFocus();
 839 }