Marble

TourItemDelegate.cpp
1// SPDX-License-Identifier: LGPL-2.1-or-later
2//
3// SPDX-FileCopyrightText: 2013 Mihail Ivchenko <ematirov@gmail.com>
4// SPDX-FileCopyrightText: 2014 Sanjiban Bairagya <sanjiban22393@gmail.com>
5// SPDX-FileCopyrightText: 2014 Illya Kovalevskyy <illya.kovalevskyy@gmail.com>
6//
7
8#include "TourItemDelegate.h"
9
10#include <QAbstractTextDocumentLayout>
11#include <QApplication>
12#include <QListView>
13#include <QPainter>
14#include <QPointer>
15#include <QStyleOptionButton>
16
17#include "EditPlacemarkDialog.h"
18#include "FlyToEditWidget.h"
19#include "GeoDataChange.h"
20#include "GeoDataCreate.h"
21#include "GeoDataDelete.h"
22#include "GeoDataPlacemark.h"
23#include "GeoDataPlaylist.h"
24#include "GeoDataUpdate.h"
25#include "MarblePlacemarkModel.h"
26#include "MarbleWidget.h"
27#include "RemoveItemEditWidget.h"
28#include "SoundCueEditWidget.h"
29#include "TourControlEditWidget.h"
30#include "TourWidget.h"
31#include "WaitEditWidget.h"
32#include "geodata/data/GeoDataAnimatedUpdate.h"
33#include "geodata/data/GeoDataContainer.h"
34#include "geodata/data/GeoDataCoordinates.h"
35#include "geodata/data/GeoDataFlyTo.h"
36#include "geodata/data/GeoDataObject.h"
37#include "geodata/data/GeoDataSoundCue.h"
38#include "geodata/data/GeoDataTourControl.h"
39#include "geodata/data/GeoDataWait.h"
40
41namespace Marble
42{
43
44TourItemDelegate::TourItemDelegate(QListView *view, MarbleWidget *widget, TourWidget *tour)
45 : m_listView(view)
46 , m_widget(widget)
47 , m_editable(true)
48 , m_tourWidget(tour)
49{
50 connect(this, SIGNAL(editingChanged(QModelIndex)), m_listView, SLOT(update(QModelIndex)));
51 m_listView->setEditTriggers(QAbstractItemView::NoEditTriggers);
52}
53
54void TourItemDelegate::paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
55{
56 QStyleOptionViewItem styleOption = option;
57 styleOption.text = QString();
58 QApplication::style()->drawControl(QStyle::CE_ItemViewItem, &styleOption, painter);
59
60 QAbstractTextDocumentLayout::PaintContext paintContext;
61 if (styleOption.state & QStyle::State_Selected) {
62 paintContext.palette.setColor(QPalette::Text, styleOption.palette.color(QPalette::Active, QPalette::HighlightedText));
63 }
64
65 if (m_listView->currentIndex() == index && m_tourWidget->isPlaying()) {
66 painter->fillRect(option.rect, paintContext.palette.color(QPalette::Midlight));
67 QStyledItemDelegate::paint(painter, option, index);
68 }
69
70 QTextDocument label;
71 QRect const labelRect = position(Label, option);
72 label.setTextWidth(labelRect.width());
73 label.setDefaultFont(option.font);
74
75 QStyleOptionButton button;
76 button.state = option.state;
77 button.palette = option.palette;
78 button.features = QStyleOptionButton::None;
79 button.iconSize = QSize(16, 16);
80 button.state &= ~QStyle::State_HasFocus;
81 if (!editable()) {
82 button.state &= ~QStyle::State_Enabled;
83 }
84
85 QRect const iconRect = position(GeoDataElementIcon, option);
86
87 const GeoDataObject *object = qvariant_cast<GeoDataObject *>(index.data(MarblePlacemarkModel::ObjectPointerRole));
88 if (!m_editingIndices.contains(index)) {
89 if (const auto tourControl = geodata_cast<GeoDataTourControl>(object)) {
90 GeoDataTourControl::PlayMode const playMode = tourControl->playMode();
91
92 if (playMode == GeoDataTourControl::Play) {
93 label.setHtml(tr("Play the tour"));
94 } else if (playMode == GeoDataTourControl::Pause) {
95 label.setHtml(tr("Pause the tour"));
96 }
97 painter->save();
98 painter->translate(labelRect.topLeft());
99 painter->setClipRect(0, 0, labelRect.width(), labelRect.height());
100 label.documentLayout()->draw(painter, paintContext);
101 painter->restore();
102 button.icon = QIcon(QStringLiteral(":/marble/document-edit.png"));
103
104 QRect const buttonRect = position(EditButton, option);
105 button.rect = buttonRect;
106
107 QIcon const icon = QIcon(QStringLiteral(":/marble/media-playback-pause.png"));
108 painter->drawPixmap(iconRect, icon.pixmap(iconRect.size()));
109
110 } else if (geodata_cast<GeoDataFlyTo>(object)) {
111 auto const flyToCoords = index.data(MarblePlacemarkModel::CoordinateRole).value<GeoDataCoordinates>();
112 label.setHtml(flyToCoords.toString());
113 button.icon = QIcon(QStringLiteral(":/marble/document-edit.png"));
114
115 painter->save();
116 painter->translate(labelRect.topLeft());
117 painter->setClipRect(0, 0, labelRect.width(), labelRect.height());
118 label.documentLayout()->draw(painter, paintContext);
119 painter->restore();
120
121 QRect const buttonRect = position(EditButton, option);
122 button.rect = buttonRect;
123
124 QIcon const icon = QIcon(QStringLiteral(":/marble/flag.png"));
125 painter->drawPixmap(iconRect, icon.pixmap(iconRect.size()));
126 } else if (const auto wait = geodata_cast<GeoDataWait>(object)) {
127 label.setHtml(tr("Wait for %1 seconds").arg(QString::number(wait->duration())));
128
129 painter->save();
130 painter->translate(labelRect.topLeft());
131 painter->setClipRect(0, 0, labelRect.width(), labelRect.height());
132 label.documentLayout()->draw(painter, paintContext);
133 painter->restore();
134
135 button.icon = QIcon(QStringLiteral(":/marble/document-edit.png"));
136
137 QRect const buttonRect = position(EditButton, option);
138 button.rect = buttonRect;
139
140 QIcon const icon = QIcon(QStringLiteral(":/marble/player-time.png"));
141 painter->drawPixmap(iconRect, icon.pixmap(iconRect.size()));
142 } else if (const auto soundCue = geodata_cast<GeoDataSoundCue>(object)) {
143 label.setHtml(soundCue->href().section(QLatin1Char('/'), -1));
144
145 painter->save();
146 painter->translate(labelRect.topLeft());
147 painter->setClipRect(0, 0, labelRect.width(), labelRect.height());
148 label.documentLayout()->draw(painter, paintContext);
149 painter->restore();
150
151 QStyleOptionButton playButton = button;
152
153 button.icon = QIcon(QStringLiteral(":/marble/document-edit.png"));
154 QRect const buttonRect = position(EditButton, option);
155 button.rect = buttonRect;
156
157 playButton.icon = QIcon(QStringLiteral(":/marble/playback-play.png"));
158 QRect const playButtonRect = position(ActionButton, option);
159 playButton.rect = playButtonRect;
160 QApplication::style()->drawControl(QStyle::CE_PushButton, &playButton, painter);
161
162 QIcon const icon = QIcon(QStringLiteral(":/marble/audio-x-generic.png"));
163 painter->drawPixmap(iconRect, icon.pixmap(iconRect.size()));
164 } else if (const auto animUpdate = geodata_cast<GeoDataAnimatedUpdate>(object)) {
165 const GeoDataUpdate *update = animUpdate->update();
166 bool ok = false;
167 QString iconString;
168 if (update && update->create() && update->create()->size() != 0 && (dynamic_cast<const GeoDataContainer *>(&update->create()->first()))) {
169 const auto container = static_cast<const GeoDataContainer *>(update->create()->child(0));
170 if (container->size() > 0) {
171 label.setHtml(tr("Create item %1").arg(container->first().id()));
172 ok = true;
173 iconString = QStringLiteral(":/icons/add-placemark.png");
174 }
175 } else if (update && update->getDelete() && update->getDelete()->size() != 0) {
176 label.setHtml(tr("Remove item %1").arg(update->getDelete()->first().targetId()));
177 ok = true;
178 iconString = QStringLiteral(":/icons/remove.png");
179 } else if (update && update->change() && update->change()->size() != 0) {
180 label.setHtml(tr("Change item %1").arg(update->change()->first().targetId()));
181 ok = true;
182 iconString = QStringLiteral(":/marble/document-edit.png");
183 }
184 if (update && !ok) {
185 label.setHtml(tr("Update items"));
186 button.state &= ~QStyle::State_Enabled & ~QStyle::State_Sunken;
187 }
188
189 painter->save();
190 painter->translate(labelRect.topLeft());
191 painter->setClipRect(0, 0, labelRect.width(), labelRect.height());
192 label.documentLayout()->draw(painter, paintContext);
193 painter->restore();
194
195 button.icon = QIcon(QStringLiteral(":/marble/document-edit.png"));
196 QRect const buttonRect = position(EditButton, option);
197 button.rect = buttonRect;
198
199 QIcon const icon = QIcon(iconString);
200 painter->drawPixmap(iconRect, icon.pixmap(iconRect.size()));
201 }
202 }
203
204 QApplication::style()->drawControl(QStyle::CE_PushButton, &button, painter);
205}
206
207QRect TourItemDelegate::position(Element element, const QStyleOptionViewItem &option)
208{
209 QPoint const topCol1 = option.rect.topLeft() + QPoint(10, 10);
210 QPoint const topCol2 = topCol1 + QPoint(30, 0);
211 QPoint const topCol3 = topCol2 + QPoint(210, 0);
212 QPoint const topCol4 = topCol3 + QPoint(30, 0);
213 QSize const labelSize = QSize(220, 30);
214 QSize const iconsSize = QSize(22, 22);
215
216 switch (element) {
217 case GeoDataElementIcon:
218 return QRect(topCol1, iconsSize);
219 case Label:
220 return QRect(topCol2, labelSize);
221 case EditButton:
222 return QRect(topCol3, iconsSize);
223 case ActionButton:
224 return QRect(topCol4, iconsSize);
225 }
226 return {};
227}
228
229QStringList TourItemDelegate::findIds(const GeoDataPlaylist &playlist, bool onlyFeatures)
230{
231 QStringList result;
232 for (int i = 0; i < playlist.size(); ++i) {
233 const GeoDataTourPrimitive *primitive = playlist.primitive(i);
234 if (!primitive->id().isEmpty() && !onlyFeatures) {
235 result << primitive->id();
236 }
237 if (const auto animatedUpdate = geodata_cast<GeoDataAnimatedUpdate>(primitive)) {
238 if (animatedUpdate->update() != nullptr) {
239 const GeoDataUpdate *update = animatedUpdate->update();
240 if (!update->id().isEmpty() && !onlyFeatures) {
241 result << update->id();
242 }
243 if (update->create() != nullptr) {
244 if (!update->create()->id().isEmpty() && !onlyFeatures) {
245 result << update->create()->id();
246 }
247 for (int j = 0; j < update->create()->size(); ++j) {
248 if (!update->create()->at(j).id().isEmpty()) {
249 result << update->create()->at(j).id();
250 }
251 }
252 }
253 if (update->change() != nullptr) {
254 if (!update->change()->id().isEmpty() && !onlyFeatures) {
255 result << update->change()->id();
256 }
257 for (int j = 0; j < update->change()->size(); ++j) {
258 if (!update->change()->at(j).id().isEmpty()) {
259 result << update->change()->at(j).id();
260 }
261 }
262 }
263 if (update->getDelete() != nullptr) {
264 if (!update->getDelete()->id().isEmpty() && !onlyFeatures) {
265 result << update->getDelete()->id();
266 }
267 for (int j = 0; j < update->getDelete()->size(); ++j) {
268 if (!update->getDelete()->at(j).id().isEmpty()) {
269 result << update->getDelete()->at(j).id();
270 }
271 }
272 }
273 }
274 }
275 }
276 return result;
277}
278
279GeoDataPlaylist *TourItemDelegate::playlist() const
280{
281 QModelIndex const rootIndex = m_listView->rootIndex();
282 if (rootIndex.isValid()) {
283 auto rootObject = static_cast<GeoDataObject *>(rootIndex.internalPointer());
284 if (auto playlist = geodata_cast<GeoDataPlaylist>(rootObject)) {
285 return playlist;
286 }
287 }
288 return nullptr;
289}
290
291QSize TourItemDelegate::sizeHint(const QStyleOptionViewItem &option, const QModelIndex &index) const
292{
293 Q_UNUSED(option);
294 Q_UNUSED(index);
295 return {290, 50};
296}
297
298QWidget *TourItemDelegate::createEditor(QWidget *parent, const QStyleOptionViewItem &option, const QModelIndex &index) const
299{
300 Q_UNUSED(option);
301 auto object = qvariant_cast<GeoDataObject *>(index.data(MarblePlacemarkModel::ObjectPointerRole));
302 if (geodata_cast<GeoDataFlyTo>(object)) {
303 auto widget = new FlyToEditWidget(index, m_widget, parent);
304 widget->setFirstFlyTo(m_firstFlyTo);
305 connect(widget, SIGNAL(editingDone(QModelIndex)), this, SLOT(closeEditor(QModelIndex)));
306 connect(this, SIGNAL(editableChanged(bool)), widget, SLOT(setEditable(bool)));
307 connect(this, SIGNAL(firstFlyToChanged(QPersistentModelIndex)), widget, SLOT(setFirstFlyTo(QPersistentModelIndex)));
308 return widget;
309
310 } else if (geodata_cast<GeoDataTourControl>(object)) {
311 auto widget = new TourControlEditWidget(index, parent);
312 connect(widget, SIGNAL(editingDone(QModelIndex)), this, SLOT(closeEditor(QModelIndex)));
313 connect(this, SIGNAL(editableChanged(bool)), widget, SLOT(setEditable(bool)));
314 return widget;
315
316 } else if (geodata_cast<GeoDataWait>(object)) {
317 auto widget = new WaitEditWidget(index, parent);
318 connect(widget, SIGNAL(editingDone(QModelIndex)), this, SLOT(closeEditor(QModelIndex)));
319 connect(this, SIGNAL(editableChanged(bool)), widget, SLOT(setEditable(bool)));
320 return widget;
321
322 } else if (geodata_cast<GeoDataSoundCue>(object)) {
323 auto widget = new SoundCueEditWidget(index, parent);
324 connect(widget, SIGNAL(editingDone(QModelIndex)), this, SLOT(closeEditor(QModelIndex)));
325 connect(this, SIGNAL(editableChanged(bool)), widget, SLOT(setEditable(bool)));
326 return widget;
327
328 } else if (geodata_cast<GeoDataAnimatedUpdate>(object)) {
329 auto widget = new RemoveItemEditWidget(index, parent);
330 GeoDataPlaylist *playlistObject = playlist();
331 if (playlistObject != nullptr) {
332 widget->setFeatureIds(findIds(*playlistObject));
333 }
334 widget->setDefaultFeatureId(m_defaultFeatureId);
335 connect(widget, SIGNAL(editingDone(QModelIndex)), this, SLOT(closeEditor(QModelIndex)));
336 connect(this, SIGNAL(editableChanged(bool)), widget, SLOT(setEditable(bool)));
337 connect(this, SIGNAL(featureIdsChanged(QStringList)), widget, SLOT(setFeatureIds(QStringList)));
338 connect(this, SIGNAL(defaultFeatureIdChanged(QString)), widget, SLOT(setDefaultFeatureId(QString)));
339 return widget;
340 }
341 return nullptr;
342}
343
344bool TourItemDelegate::editable() const
345{
346 return m_editable;
347}
348
349void TourItemDelegate::setEditable(bool editable)
350{
351 if (m_editable != editable) {
352 m_editable = editable;
353 Q_EMIT editableChanged(m_editable);
354 }
355}
356
357QModelIndex TourItemDelegate::firstFlyTo() const
358{
359 return m_firstFlyTo;
360}
361
362bool TourItemDelegate::editAnimatedUpdate(GeoDataAnimatedUpdate *animatedUpdate, bool create)
363{
364 if (animatedUpdate->update() == nullptr) {
365 return false;
366 }
367 GeoDataFeature *feature = nullptr;
368 if (create && !(animatedUpdate->update()->create() == nullptr || animatedUpdate->update()->create()->size() == 0)) {
369 auto container = dynamic_cast<GeoDataContainer *>(animatedUpdate->update()->create()->child(0));
370 if (container != nullptr && container->size()) {
371 feature = container->child(0);
372 }
373 } else if (!create && !(animatedUpdate->update()->change() == nullptr || animatedUpdate->update()->change()->size() == 0)) {
374 auto container = dynamic_cast<GeoDataContainer *>(animatedUpdate->update()->change()->child(0));
375 if (container != nullptr && container->size()) {
376 feature = container->child(0);
377 }
378 }
379 if (feature == nullptr) {
380 return false;
381 }
382
383 QStringList ids;
384
385 auto placemark = static_cast<GeoDataPlacemark *>(feature);
386
387 if (!create) {
388 if (placemark->targetId().isEmpty() && !defaultFeatureId().isEmpty()) {
389 GeoDataFeature *feature = findFeature(defaultFeatureId());
390 if (GeoDataPlacemark *targetPlacemark = (feature != nullptr ? geodata_cast<GeoDataPlacemark>(feature) : nullptr)) {
391 animatedUpdate->update()->change()->placemarkList().remove(0);
392 delete placemark;
393 placemark = new GeoDataPlacemark(*targetPlacemark);
394 animatedUpdate->update()->change()->placemarkList().insert(0, placemark);
395 placemark->setTargetId(defaultFeatureId());
396 placemark->setId(QString());
397 }
398 }
399 }
400
401 QPointer<EditPlacemarkDialog> dialog = new EditPlacemarkDialog(placemark, nullptr, m_widget);
402 if (create) {
403 dialog->setWindowTitle(QObject::tr("Add Placemark to Tour"));
404 } else {
405 dialog->setWindowTitle(QObject::tr("Change Placemark in Tour"));
406 dialog->setTargetIdFieldVisible(true);
407 dialog->setIdFieldVisible(false);
408 }
409 GeoDataPlaylist *playlistObject = playlist();
410 if (playlistObject != nullptr) {
411 ids.append(findIds(*playlistObject, true));
412 }
413 ids.removeOne(placemark->id());
414 if (create) {
415 dialog->setIdFilter(ids);
416 } else {
417 dialog->setTargetIds(ids);
418 }
419 bool status = dialog->exec();
420 if (!create) {
421 placemark->setId(QString());
422 }
423 return status;
424}
425
426QString TourItemDelegate::defaultFeatureId() const
427{
428 return m_defaultFeatureId;
429}
430
431GeoDataFeature *TourItemDelegate::findFeature(const QString &id) const
432{
433 GeoDataPlaylist *playlistObject = playlist();
434 if (playlistObject == nullptr) {
435 return nullptr;
436 }
437 GeoDataFeature *result = nullptr;
438 for (int i = 0; i < playlistObject->size(); ++i) {
439 GeoDataTourPrimitive *primitive = playlistObject->primitive(i);
440 if (auto animatedUpdate = geodata_cast<GeoDataAnimatedUpdate>(primitive)) {
441 if (animatedUpdate->update() != nullptr) {
442 GeoDataUpdate *update = animatedUpdate->update();
443 if (update->create() != nullptr) {
444 for (int j = 0; j < update->create()->featureList().size(); ++j) {
445 if (update->create()->at(j).id() == id) {
446 result = update->create()->featureList().at(j);
447 }
448 }
449 }
450 if (update->change() != nullptr) {
451 for (int j = 0; j < update->change()->featureList().size(); ++j) {
452 if (update->change()->at(j).id() == id) {
453 result = update->change()->featureList().at(j);
454 }
455 }
456 }
457 if (update->getDelete() != nullptr) {
458 for (int j = 0; j < update->getDelete()->featureList().size(); ++j) {
459 if (update->getDelete()->at(j).id() == id) {
460 result = update->getDelete()->featureList().at(j);
461 }
462 }
463 }
464 }
465 }
466 }
467 return result;
468}
469
470void TourItemDelegate::setFirstFlyTo(const QPersistentModelIndex &index)
471{
472 m_firstFlyTo = index;
473 Q_EMIT firstFlyToChanged(m_firstFlyTo);
474}
475
476void TourItemDelegate::setDefaultFeatureId(const QString &id)
477{
478 m_defaultFeatureId = id;
479 const QStringList ids = playlist() ? findIds(*playlist()) : QStringList();
480 Q_EMIT featureIdsChanged(ids);
481 Q_EMIT defaultFeatureIdChanged(id);
482}
483
484bool TourItemDelegate::editorEvent(QEvent *event, QAbstractItemModel *model, const QStyleOptionViewItem &option, const QModelIndex &index)
485{
486 Q_UNUSED(model);
487 if ((event->type() == QEvent::MouseButtonRelease) && editable()) {
488 auto mouseEvent = static_cast<QMouseEvent *>(event);
489 QRect editRect = position(EditButton, option);
490 if (editRect.contains(mouseEvent->pos())) {
491 if (m_editingIndices.contains(index)) {
492 m_editingIndices.removeOne(index);
493 Q_EMIT editingChanged(index);
494 return true;
495 } else {
496 auto object = qvariant_cast<GeoDataObject *>(index.data(MarblePlacemarkModel::ObjectPointerRole));
497 if (auto animatedUpdate = geodata_cast<GeoDataAnimatedUpdate>(object)) {
498 if (animatedUpdate->update() && animatedUpdate->update()->create()) {
499 if (editAnimatedUpdate(animatedUpdate)) {
500 setDefaultFeatureId(m_defaultFeatureId);
501 }
502 } else if (animatedUpdate->update() && animatedUpdate->update()->change()) {
503 editAnimatedUpdate(animatedUpdate, false);
504 } else if (animatedUpdate->update() && animatedUpdate->update()->getDelete()) {
505 m_editingIndices.append(index);
506 m_listView->openPersistentEditor(index);
507 }
508 } else {
509 m_editingIndices.append(index);
510 m_listView->openPersistentEditor(index);
511 }
512 }
513 Q_EMIT editingChanged(index);
514 return true;
515 }
516 }
517 return false;
518}
519
520void TourItemDelegate::closeEditor(const QModelIndex &index)
521{
522 Q_EMIT edited(index);
523 m_listView->closePersistentEditor(index);
524 m_editingIndices.removeOne(index);
525}
526
527}
528
529#include "moc_TourItemDelegate.cpp"
MarbleWidget.h
This file contains the headers for MarbleWidget.
status
Q_SCRIPTABLE CaptureState status()
Akonadi::CalendarUtils::event
AKONADI_CALENDAR_EXPORT KCalendarCore::Event::Ptr event(const Akonadi::Item &item)
Akonadi::Server::PartHelper::update
void update(Part *part, const QByteArray &data, qint64 dataSize)
KGameStandardAction::create
QAction * create(GameStandardAction id, const QObject *recvr, const char *slot, QObject *parent)
KStandardShortcut::label
QString label(StandardShortcut id)
Marble
Binds a QML item to a specific geodetic location in screen coordinates.
Definition AbstractDataPlugin.cpp:23
QApplication::style
QStyle * style()
QEvent::MouseButtonRelease
MouseButtonRelease
QIcon::pixmap
QPixmap pixmap(QWindow *window, const QSize &size, Mode mode, State state) const const
QList::append
void append(QList< T > &&value)
QList::removeOne
bool removeOne(const AT &t)
QModelIndex::data
QVariant data(int role) const const
QModelIndex::internalPointer
void * internalPointer() const const
QModelIndex::isValid
bool isValid() const const
QObject::tr
QString tr(const char *sourceText, const char *disambiguation, int n)
QPainter::drawPixmap
void drawPixmap(const QPoint &point, const QPixmap &pixmap)
QPainter::fillRect
void fillRect(const QRect &rectangle, QGradient::Preset preset)
QPainter::restore
void restore()
QPainter::save
void save()
QPainter::setClipRect
void setClipRect(const QRect &rectangle, Qt::ClipOperation operation)
QPainter::translate
void translate(const QPoint &offset)
QRect::contains
bool contains(const QPoint &point, bool proper) const const
QRect::height
int height() const const
QRect::size
QSize size() const const
QRect::topLeft
QPoint topLeft() const const
QRect::width
int width() const const
QString::number
QString number(double n, char format, int precision)
QStyle::drawControl
virtual void drawControl(ControlElement element, const QStyleOption *option, QPainter *painter, const QWidget *widget) const const=0
QStyledItemDelegate::paint
virtual void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const const override
QtFuture::connect
QFuture< ArgsType< Signal > > connect(Sender *sender, Signal signal)
QVariant::value
T value() const const
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