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