QTreeView::dataChanged() signature changed in Qt5
[quassel.git] / src / uisupport / bufferview.cpp
1 /***************************************************************************
2  *   Copyright (C) 2005-2014 by the Quassel Project                        *
3  *   devel@quassel-irc.org                                                 *
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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
32 #include "action.h"
33 #include "buffermodel.h"
34 #include "bufferviewfilter.h"
35 #include "buffersettings.h"
36 #include "buffersyncer.h"
37 #include "client.h"
38 #include "contextmenuactionprovider.h"
39 #include "graphicalui.h"
40 #include "network.h"
41 #include "networkmodel.h"
42 #include "contextmenuactionprovider.h"
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 {
52     connect(this, SIGNAL(collapsed(const QModelIndex &)), SLOT(storeExpandedState(const QModelIndex &)));
53     connect(this, SIGNAL(expanded(const QModelIndex &)), SLOT(storeExpandedState(const QModelIndex &)));
54
55     setSelectionMode(QAbstractItemView::ExtendedSelection);
56
57     QAbstractItemDelegate *oldDelegate = itemDelegate();
58     BufferViewDelegate *tristateDelegate = new BufferViewDelegate(this);
59     setItemDelegate(tristateDelegate);
60     delete oldDelegate;
61 }
62
63
64 void BufferView::init()
65 {
66     header()->setContextMenuPolicy(Qt::ActionsContextMenu);
67     hideColumn(1);
68     hideColumn(2);
69     setIndentation(10);
70
71     expandAll();
72
73     header()->hide(); // nobody seems to use this anyway
74
75     // breaks with Qt 4.8
76     if (QString("4.8.0") > qVersion()) // FIXME breaks with Qt versions >= 4.10!
77         setAnimated(true);
78
79     // FIXME This is to workaround bug #663
80     setUniformRowHeights(true);
81
82 #ifndef QT_NO_DRAGANDDROP
83     setDragEnabled(true);
84     setAcceptDrops(true);
85     setDropIndicatorShown(true);
86 #endif
87
88     setSortingEnabled(true);
89     sortByColumn(0, Qt::AscendingOrder);
90
91     // activated() fails on X11 and Qtopia at least
92 #if defined Q_WS_QWS || defined Q_WS_X11
93     disconnect(this, SIGNAL(doubleClicked(QModelIndex)), this, SLOT(joinChannel(QModelIndex)));
94     connect(this, SIGNAL(doubleClicked(QModelIndex)), SLOT(joinChannel(QModelIndex)));
95 #else
96     // afaik this is better on Mac and Windows
97     disconnect(this, SIGNAL(activated(QModelIndex)), this, SLOT(joinChannel(QModelIndex)));
98     connect(this, SIGNAL(activated(QModelIndex)), SLOT(joinChannel(QModelIndex)));
99 #endif
100 }
101
102
103 void BufferView::setModel(QAbstractItemModel *model)
104 {
105     delete selectionModel();
106
107     QTreeView::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
134
135 void BufferView::setFilteredModel(QAbstractItemModel *model_, BufferViewConfig *config)
136 {
137     BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
138     if (filter) {
139         filter->setConfig(config);
140         setConfig(config);
141         return;
142     }
143
144     if (model()) {
145         disconnect(this, 0, model(), 0);
146         disconnect(model(), 0, this, 0);
147     }
148
149     if (!model_) {
150         setModel(model_);
151     }
152     else {
153         BufferViewFilter *filter = new BufferViewFilter(model_, config);
154         setModel(filter);
155         connect(filter, SIGNAL(configChanged()), this, SLOT(on_configChanged()));
156     }
157     setConfig(config);
158 }
159
160
161 void BufferView::setSelectionModel(QItemSelectionModel *selectionModel)
162 {
163     if (QTreeView::selectionModel())
164         disconnect(selectionModel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
165             model(), SIGNAL(checkPreviousCurrentForRemoval(QModelIndex, QModelIndex)));
166
167     QTreeView::setSelectionModel(selectionModel);
168     BufferViewFilter *filter = qobject_cast<BufferViewFilter *>(model());
169     if (filter) {
170         connect(selectionModel, SIGNAL(currentChanged(QModelIndex, QModelIndex)),
171             filter, SLOT(checkPreviousCurrentForRemoval(QModelIndex, QModelIndex)));
172     }
173 }
174
175
176 void BufferView::setConfig(BufferViewConfig *config)
177 {
178     if (_config == config)
179         return;
180
181     if (_config) {
182         disconnect(_config, 0, this, 0);
183     }
184
185     _config = config;
186     if (config) {
187         connect(config, SIGNAL(networkIdSet(const NetworkId &)), this, SLOT(setRootIndexForNetworkId(const NetworkId &)));
188         setRootIndexForNetworkId(config->networkId());
189     }
190     else {
191         setIndentation(10);
192         setRootIndex(QModelIndex());
193     }
194 }
195
196
197 void BufferView::setRootIndexForNetworkId(const NetworkId &networkId)
198 {
199     if (!networkId.isValid() || !model()) {
200         setIndentation(10);
201         setRootIndex(QModelIndex());
202     }
203     else {
204         setIndentation(5);
205         int networkCount = model()->rowCount();
206         QModelIndex child;
207         for (int i = 0; i < networkCount; i++) {
208             child = model()->index(i, 0);
209             if (networkId == model()->data(child, NetworkModel::NetworkIdRole).value<NetworkId>())
210                 setRootIndex(child);
211         }
212     }
213 }
214
215
216 void BufferView::joinChannel(const QModelIndex &index)
217 {
218     BufferInfo::Type bufferType = (BufferInfo::Type)index.data(NetworkModel::BufferTypeRole).value<int>();
219
220     if (bufferType != BufferInfo::ChannelBuffer)
221         return;
222
223     BufferInfo bufferInfo = index.data(NetworkModel::BufferInfoRole).value<BufferInfo>();
224
225     Client::userInput(bufferInfo, QString("/JOIN %1").arg(bufferInfo.bufferName()));
226 }
227
228
229 void BufferView::keyPressEvent(QKeyEvent *event)
230 {
231     if (event->key() == Qt::Key_Backspace || event->key() == Qt::Key_Delete) {
232         event->accept();
233         removeSelectedBuffers();
234     }
235     QTreeView::keyPressEvent(event);
236 }
237
238
239 void BufferView::dropEvent(QDropEvent *event)
240 {
241     QModelIndex index = indexAt(event->pos());
242
243     QRect indexRect = visualRect(index);
244     QPoint cursorPos = event->pos();
245
246     // check if we're really _on_ the item and not indicating a move to just above or below the item
247     const int margin = 2;
248     if (cursorPos.y() - indexRect.top() < margin
249         || indexRect.bottom() - cursorPos.y() < margin)
250         return QTreeView::dropEvent(event);
251
252     QList<QPair<NetworkId, BufferId> > bufferList = Client::networkModel()->mimeDataToBufferList(event->mimeData());
253     if (bufferList.count() != 1)
254         return QTreeView::dropEvent(event);
255
256     NetworkId networkId = bufferList[0].first;
257     BufferId bufferId2 = bufferList[0].second;
258
259     if (index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
260         return QTreeView::dropEvent(event);
261
262     if (index.data(NetworkModel::BufferTypeRole) != BufferInfo::QueryBuffer)
263         return QTreeView::dropEvent(event);
264
265     if (index.data(NetworkModel::NetworkIdRole).value<NetworkId>() != networkId)
266         return QTreeView::dropEvent(event);
267
268     BufferId bufferId1 = index.data(NetworkModel::BufferIdRole).value<BufferId>();
269     if (bufferId1 == bufferId2)
270         return QTreeView::dropEvent(event);
271
272     int res = QMessageBox::question(0, tr("Merge buffers permanently?"),
273         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)),
274         QMessageBox::Yes|QMessageBox::No, QMessageBox::No);
275     if (res == QMessageBox::Yes) {
276         Client::mergeBuffersPermanently(bufferId1, bufferId2);
277     }
278 }
279
280
281 void BufferView::removeSelectedBuffers(bool permanently)
282 {
283     if (!config())
284         return;
285
286     BufferId bufferId;
287     QSet<BufferId> removedRows;
288     foreach(QModelIndex index, selectionModel()->selectedIndexes()) {
289         if (index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
290             continue;
291
292         bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
293         if (removedRows.contains(bufferId))
294             continue;
295
296         removedRows << bufferId;
297     }
298
299     foreach(BufferId bufferId, removedRows) {
300         if (permanently)
301             config()->requestRemoveBufferPermanently(bufferId);
302         else
303             config()->requestRemoveBuffer(bufferId);
304     }
305 }
306
307
308 void BufferView::rowsInserted(const QModelIndex &parent, int start, int end)
309 {
310     QTreeView::rowsInserted(parent, start, end);
311
312     // ensure that newly inserted network nodes are expanded per default
313     if (parent.data(NetworkModel::ItemTypeRole) != NetworkModel::NetworkItemType)
314         return;
315
316     setExpandedState(parent);
317 }
318
319
320 void BufferView::on_layoutChanged()
321 {
322     int numNets = model()->rowCount(QModelIndex());
323     for (int row = 0; row < numNets; row++) {
324         QModelIndex networkIdx = model()->index(row, 0, QModelIndex());
325         setExpandedState(networkIdx);
326     }
327 }
328
329
330 void BufferView::on_configChanged()
331 {
332     Q_ASSERT(model());
333
334     // expand all active networks... collapse inactive ones... unless manually changed
335     QModelIndex networkIdx;
336     NetworkId networkId;
337     for (int row = 0; row < model()->rowCount(); row++) {
338         networkIdx = model()->index(row, 0);
339         if (model()->rowCount(networkIdx) ==  0)
340             continue;
341
342         networkId = model()->data(networkIdx, NetworkModel::NetworkIdRole).value<NetworkId>();
343         if (!networkId.isValid())
344             continue;
345
346         setExpandedState(networkIdx);
347     }
348
349     if (config()) {
350         // update selection to current one
351         Client::bufferModel()->synchronizeView(this);
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     QTreeView::dataChanged(topLeft, bottomRight);
399 #else
400 void BufferView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight, const QVector<int> &roles)
401 {
402     QTreeView::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
539 void BufferView::wheelEvent(QWheelEvent *event)
540 {
541     if (ItemViewSettings().mouseWheelChangesBuffer() == (bool)(event->modifiers() & Qt::AltModifier))
542         return QTreeView::wheelEvent(event);
543
544     int rowDelta = (event->delta() > 0) ? -1 : 1;
545     changeBuffer((Direction)rowDelta);
546 }
547
548
549 void BufferView::hideCurrentBuffer()
550 {
551     QModelIndex index = selectionModel()->currentIndex();
552     if (index.data(NetworkModel::ItemTypeRole) != NetworkModel::BufferItemType)
553         return;
554
555     BufferId bufferId = index.data(NetworkModel::BufferIdRole).value<BufferId>();
556
557     //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.
558     changeBuffer(Backward);
559
560     /*if(removedRows.contains(bufferId))
561       continue;
562
563     removedRows << bufferId;*/
564     /*if(permanently)
565       config()->requestRemoveBufferPermanently(bufferId);
566     else*/
567     config()->requestRemoveBuffer(bufferId);
568 }
569
570
571 QSize BufferView::sizeHint() const
572 {
573     return QTreeView::sizeHint();
574
575     if (!model())
576         return QTreeView::sizeHint();
577
578     if (model()->rowCount() == 0)
579         return QSize(120, 50);
580
581     int columnSize = 0;
582     for (int i = 0; i < model()->columnCount(); i++) {
583         if (!isColumnHidden(i))
584             columnSize += sizeHintForColumn(i);
585     }
586     return QSize(columnSize, 50);
587 }
588
589
590 // ****************************************
591 //  BufferViewDelgate
592 // ****************************************
593 class ColorsChangedEvent : public QEvent
594 {
595 public:
596     ColorsChangedEvent() : QEvent(QEvent::User) {};
597 };
598
599
600 BufferViewDelegate::BufferViewDelegate(QObject *parent)
601     : QStyledItemDelegate(parent)
602 {
603 }
604
605
606 void BufferViewDelegate::customEvent(QEvent *event)
607 {
608     if (event->type() != QEvent::User)
609         return;
610
611     event->accept();
612 }
613
614
615 bool BufferViewDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
616 {
617     if (event->type() != QEvent::MouseButtonRelease)
618         return QStyledItemDelegate::editorEvent(event, model, option, index);
619
620     if (!(model->flags(index) & Qt::ItemIsUserCheckable))
621         return QStyledItemDelegate::editorEvent(event, model, option, index);
622
623     QVariant value = index.data(Qt::CheckStateRole);
624     if (!value.isValid())
625         return QStyledItemDelegate::editorEvent(event, model, option, index);
626
627     QStyleOptionViewItemV4 viewOpt(option);
628     initStyleOption(&viewOpt, index);
629
630     QRect checkRect = viewOpt.widget->style()->subElementRect(QStyle::SE_ItemViewItemCheckIndicator, &viewOpt, viewOpt.widget);
631     QMouseEvent *me = static_cast<QMouseEvent *>(event);
632
633     if (me->button() != Qt::LeftButton || !checkRect.contains(me->pos()))
634         return QStyledItemDelegate::editorEvent(event, model, option, index);
635
636     Qt::CheckState state = static_cast<Qt::CheckState>(value.toInt());
637     if (state == Qt::Unchecked)
638         state = Qt::PartiallyChecked;
639     else if (state == Qt::PartiallyChecked)
640         state = Qt::Checked;
641     else
642         state = Qt::Unchecked;
643     model->setData(index, state, Qt::CheckStateRole);
644     return true;
645 }
646
647
648 // ==============================
649 //  BufferView Dock
650 // ==============================
651 BufferViewDock::BufferViewDock(BufferViewConfig *config, QWidget *parent)
652     : QDockWidget(parent),
653     _active(false),
654     _title(config->bufferViewName())
655 {
656     setObjectName("BufferViewDock-" + QString::number(config->bufferViewId()));
657     toggleViewAction()->setData(config->bufferViewId());
658     setAllowedAreas(Qt::RightDockWidgetArea|Qt::LeftDockWidgetArea);
659     connect(config, SIGNAL(bufferViewNameSet(const QString &)), this, SLOT(bufferViewRenamed(const QString &)));
660     updateTitle();
661 }
662
663
664 void BufferViewDock::updateTitle()
665 {
666     QString title = _title;
667     if (isActive())
668         title.prepend(QString::fromUtf8("• "));
669     setWindowTitle(title);
670 }
671
672
673 void BufferViewDock::setActive(bool active)
674 {
675     if (active != isActive()) {
676         _active = active;
677         updateTitle();
678         if (active)
679             raise();  // for tabbed docks
680     }
681 }
682
683
684 void BufferViewDock::bufferViewRenamed(const QString &newName)
685 {
686     _title = newName;
687     updateTitle();
688     toggleViewAction()->setText(newName);
689 }
690
691
692 int BufferViewDock::bufferViewId() const
693 {
694     BufferView *view = bufferView();
695     if (!view)
696         return 0;
697
698     if (view->config())
699         return view->config()->bufferViewId();
700     else
701         return 0;
702 }
703
704
705 BufferViewConfig *BufferViewDock::config() const
706 {
707     BufferView *view = bufferView();
708     if (!view)
709         return 0;
710     else
711         return view->config();
712 }