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