1 /***************************************************************************
2 * Copyright (C) 2005-08 by the Quassel Project *
3 * devel@quassel-irc.org *
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. *
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. *
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 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include <QApplication>
23 #include <QGraphicsSceneMouseEvent>
24 #include <QPersistentModelIndex>
29 #include "chatlinemodelitem.h"
30 #include "chatscene.h"
32 #include "clientbacklogmanager.h"
33 #include "columnhandleitem.h"
34 #include "messagefilter.h"
36 #include "qtuistyle.h"
37 #include "chatviewsettings.h"
38 #include "webpreviewitem.h"
40 const qreal minContentsWidth = 200;
42 ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, QObject *parent)
43 : QGraphicsScene(0, 0, width, 0, parent),
46 _singleBufferScene(false),
47 _sceneRect(0, 0, width, 0),
50 _cutoffMode(CutoffRight),
55 MessageFilter *filter = qobject_cast<MessageFilter*>(model);
57 _singleBufferScene = filter->isSingleBufferFilter();
60 ChatViewSettings defaultSettings;
61 int defaultFirstColHandlePos = defaultSettings.value("FirstColumnHandlePos", 80).toInt();
62 int defaultSecondColHandlePos = defaultSettings.value("SecondColumnHandlePos", 200).toInt();
64 ChatViewSettings viewSettings(this);
65 _firstColHandlePos = viewSettings.value("FirstColumnHandlePos", defaultFirstColHandlePos).toInt();
66 _secondColHandlePos = viewSettings.value("SecondColumnHandlePos", defaultSecondColHandlePos).toInt();
68 _firstColHandle = new ColumnHandleItem(QtUi::style()->firstColumnSeparator());
69 addItem(_firstColHandle);
70 _firstColHandle->setXPos(_firstColHandlePos);
71 connect(_firstColHandle, SIGNAL(positionChanged(qreal)), this, SLOT(firstHandlePositionChanged(qreal)));
72 connect(this, SIGNAL(sceneRectChanged(const QRectF &)), _firstColHandle, SLOT(sceneRectChanged(const QRectF &)));
74 _secondColHandle = new ColumnHandleItem(QtUi::style()->secondColumnSeparator());
75 addItem(_secondColHandle);
76 _secondColHandle->setXPos(_secondColHandlePos);
77 connect(_secondColHandle, SIGNAL(positionChanged(qreal)), this, SLOT(secondHandlePositionChanged(qreal)));
79 connect(this, SIGNAL(sceneRectChanged(const QRectF &)), _secondColHandle, SLOT(sceneRectChanged(const QRectF &)));
83 connect(model, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
84 this, SLOT(rowsInserted(const QModelIndex &, int, int)));
85 connect(model, SIGNAL(rowsAboutToBeRemoved(const QModelIndex &, int, int)),
86 this, SLOT(rowsAboutToBeRemoved(const QModelIndex &, int, int)));
88 if(model->rowCount() > 0)
89 rowsInserted(QModelIndex(), 0, model->rowCount() - 1);
92 webPreview.delayTimer.setSingleShot(true);
93 connect(&webPreview.delayTimer, SIGNAL(timeout()), this, SLOT(showWebPreviewEvent()));
94 webPreview.deleteTimer.setInterval(600000);
95 connect(&webPreview.deleteTimer, SIGNAL(timeout()), this, SLOT(deleteWebPreviewEvent()));
98 setItemIndexMethod(QGraphicsScene::NoIndex);
101 ChatScene::~ChatScene() {
104 void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
106 // QModelIndex sidx = model()->index(start, 0);
107 // QModelIndex eidx = model()->index(end, 0);
108 // qDebug() << "rowsInserted" << start << end << "-" << sidx.data(MessageModel::MsgIdRole).value<MsgId>() << eidx.data(MessageModel::MsgIdRole).value<MsgId>();
112 qreal width = _sceneRect.width();
113 bool atBottom = (start == _lines.count());
114 bool atTop = !atBottom && (start == 0);
115 bool moveTop = false;
117 if(start < _lines.count()) {
118 y = _lines.value(start)->y();
119 } else if(atBottom && !_lines.isEmpty()) {
120 y = _lines.last()->y() + _lines.last()->height();
123 qreal contentsWidth = width - secondColumnHandle()->sceneRight();
124 qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
125 qreal timestampWidth = firstColumnHandle()->sceneLeft();
126 QPointF contentsPos(secondColumnHandle()->sceneRight(), 0);
127 QPointF senderPos(firstColumnHandle()->sceneRight(), 0);
130 for(int i = end; i >= start; i--) {
131 ChatLine *line = new ChatLine(i, model(),
133 timestampWidth, senderWidth, contentsWidth,
134 senderPos, contentsPos);
136 line->setPos(0, y-h);
137 _lines.insert(start, line);
141 for(int i = start; i <= end; i++) {
142 ChatLine *line = new ChatLine(i, model(),
144 timestampWidth, senderWidth, contentsWidth,
145 senderPos, contentsPos);
146 line->setPos(0, y+h);
148 _lines.insert(i, line);
153 // update existing items
154 for(int i = end+1; i < _lines.count(); i++) {
155 _lines[i]->setRow(i);
159 if(_selectionStart >= 0) {
160 int offset = end - start + 1;
161 int oldStart = _selectionStart;
162 if(_selectionStart >= start)
163 _selectionStart += offset;
164 if(_selectionEnd >= start) {
165 _selectionEnd += offset;
166 if(_selectionStart == oldStart)
167 for(int i = start; i < start + offset; i++)
168 _lines[i]->setSelected(true);
170 if(_firstSelectionRow >= start)
171 _firstSelectionRow += offset;
174 // neither pre- or append means we have to do dirty work: move items...
176 int moveEnd = _lines.count() - 1;
178 if(!(atTop || atBottom)) {
179 // move top means: moving 0 to end (aka: end + 1)
180 // move top means: moving end + 1 to _lines.count() - 1 (aka: _lines.count() - (end + 1)
181 if(end + 1 < _lines.count() - end - 1) {
191 for(int i = moveStart; i <= moveEnd; i++) {
193 line->setPos(0, line->pos().y() + offset);
197 // check if all went right
198 Q_ASSERT(start == 0 || _lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height() == _lines.at(start)->pos().y());
200 // if(_lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height() != _lines.at(start)->pos().y()) {
201 // qDebug() << "lines:" << _lines.count() << "start:" << start << "end:" << end;
202 // qDebug() << "line[start - 1]:" << _lines.at(start - 1)->pos().y() << "+" << _lines.at(start - 1)->height() << "=" << _lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height();
203 // qDebug() << "line[start]" << _lines.at(start)->pos().y();
204 // qDebug() << "needed moving:" << !(atTop || atBottom) << moveTop << moveStart << moveEnd << offset;
208 Q_ASSERT(end + 1 == _lines.count() || _lines.at(end)->pos().y() + _lines.at(end)->height() == _lines.at(end + 1)->pos().y());
209 // if(end + 1 < _lines.count()) {
210 // if(_lines.at(end)->pos().y() + _lines.at(end)->height() != _lines.at(end + 1)->pos().y()) {
211 // qDebug() << "lines:" << _lines.count() << "start:" << start << "end:" << end;
212 // qDebug() << "line[end]:" << _lines.at(end)->pos().y() << "+" << _lines.at(end)->height() << "=" << _lines.at(end)->pos().y() + _lines.at(end)->height();
213 // qDebug() << "line[end+1]" << _lines.at(end + 1)->pos().y();
214 // qDebug() << "needed moving:" << !(atTop || atBottom) << moveTop << moveStart << moveEnd << offset;
220 if(start < _firstLineRow) {
221 int prevFirstLineRow = _firstLineRow + (end - start + 1);
222 for(int i = end + 1; i < prevFirstLineRow; i++) {
223 _lines.at(i)->show();
226 // force new search for first proper line
230 if(atBottom || (!atTop && !moveTop)) {
231 emit lastLineChanged(_lines.last(), h);
235 void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
238 qreal h = 0; // total height of removed items;
240 bool atTop = (start == 0);
241 bool atBottom = (end == _lines.count() - 1);
242 bool moveTop = false;
246 int row = _selectingItem->row();
247 if(row >= start && row <= end)
251 // remove items from scene
252 QList<ChatLine *>::iterator lineIter = _lines.begin() + start;
253 int lineCount = start;
254 while(lineIter != _lines.end() && lineCount <= end) {
255 h += (*lineIter)->height();
257 lineIter = _lines.erase(lineIter);
261 // update rows of remaining chatlines
262 for(int i = start; i < _lines.count(); i++) {
263 _lines.at(i)->setRow(i);
267 if(_selectionStart >= 0) {
268 int offset = end - start + 1;
269 if(_selectionStart >= start)
270 _selectionStart = qMax(_selectionStart -= offset, start);
271 if(_selectionEnd >= start)
272 _selectionEnd -= offset;
273 if(_firstSelectionRow >= start)
274 _firstSelectionRow -= offset;
276 if(_selectionEnd < _selectionStart) {
277 _isSelecting = false;
278 _selectionStart = -1;
282 // neither removing at bottom or top means we have to move items...
283 if(!(atTop || atBottom)) {
286 int moveEnd = _lines.count() - 1;
287 if(start < _lines.count() - start) {
297 for(int i = moveStart; i <= moveEnd; i++) {
299 line->setPos(0, line->pos().y() + offset);
303 Q_ASSERT(start == 0 || start >= _lines.count() || _lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height() == _lines.at(start)->pos().y());
306 // when searching for the first non-date-line we have to take into account that our
307 // model still contains the just removed lines so we cannot simply call updateSceneRect()
308 int numRows = model()->rowCount();
309 QModelIndex firstLineIdx;
311 bool needOffset = false;
314 if(_firstLineRow >= start && _firstLineRow <= end) {
315 _firstLineRow = end + 1;
318 firstLineIdx = model()->index(_firstLineRow, 0);
319 } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && _firstLineRow < numRows);
322 _firstLineRow -= end - start + 1;
326 void ChatScene::updateForViewport(qreal width, qreal height) {
327 _viewportHeight = height;
331 void ChatScene::setWidth(qreal width) {
332 if(width == _sceneRect.width())
335 // clock_t startT = clock();
337 // disabling the index while doing this complex updates is about
338 // 2 to 10 times faster!
339 //setItemIndexMethod(QGraphicsScene::NoIndex);
341 QList<ChatLine *>::iterator lineIter = _lines.end();
342 QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
343 qreal linePos = _sceneRect.y() + _sceneRect.height();
344 qreal contentsWidth = width - secondColumnHandle()->sceneRight();
345 while(lineIter != lineIterBegin) {
347 (*lineIter)->setGeometryByWidth(width, contentsWidth, linePos);
349 //setItemIndexMethod(QGraphicsScene::BspTreeIndex);
351 updateSceneRect(width);
353 emit layoutChanged();
355 // clock_t endT = clock();
356 // qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
359 void ChatScene::firstHandlePositionChanged(qreal xpos) {
360 if(_firstColHandlePos == xpos)
363 _firstColHandlePos = xpos;
364 ChatViewSettings viewSettings(this);
365 viewSettings.setValue("FirstColumnHandlePos", _firstColHandlePos);
366 ChatViewSettings defaultSettings;
367 defaultSettings.setValue("FirstColumnHandlePos", _firstColHandlePos);
369 // clock_t startT = clock();
371 // disabling the index while doing this complex updates is about
372 // 2 to 10 times faster!
373 //setItemIndexMethod(QGraphicsScene::NoIndex);
375 QList<ChatLine *>::iterator lineIter = _lines.end();
376 QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
377 qreal timestampWidth = firstColumnHandle()->sceneLeft();
378 qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
379 QPointF senderPos(firstColumnHandle()->sceneRight(), 0);
381 while(lineIter != lineIterBegin) {
383 (*lineIter)->setFirstColumn(timestampWidth, senderWidth, senderPos);
385 //setItemIndexMethod(QGraphicsScene::BspTreeIndex);
389 // clock_t endT = clock();
390 // qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
393 void ChatScene::secondHandlePositionChanged(qreal xpos) {
394 if(_secondColHandlePos == xpos)
397 _secondColHandlePos = xpos;
398 ChatViewSettings viewSettings(this);
399 viewSettings.setValue("SecondColumnHandlePos", _secondColHandlePos);
400 ChatViewSettings defaultSettings;
401 defaultSettings.setValue("SecondColumnHandlePos", _secondColHandlePos);
403 // clock_t startT = clock();
405 // disabling the index while doing this complex updates is about
406 // 2 to 10 times faster!
407 //setItemIndexMethod(QGraphicsScene::NoIndex);
409 QList<ChatLine *>::iterator lineIter = _lines.end();
410 QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
411 qreal linePos = _sceneRect.y() + _sceneRect.height();
412 qreal senderWidth = secondColumnHandle()->sceneLeft() - firstColumnHandle()->sceneRight();
413 qreal contentsWidth = _sceneRect.width() - secondColumnHandle()->sceneRight();
414 QPointF contentsPos(secondColumnHandle()->sceneRight(), 0);
415 while(lineIter != lineIterBegin) {
417 (*lineIter)->setSecondColumn(senderWidth, contentsWidth, contentsPos, linePos);
419 //setItemIndexMethod(QGraphicsScene::BspTreeIndex);
423 emit layoutChanged();
425 // clock_t endT = clock();
426 // qDebug() << "resized" << _lines.count() << "in" << (float)(endT - startT) / CLOCKS_PER_SEC << "sec";
429 void ChatScene::setHandleXLimits() {
430 _firstColHandle->setXLimits(0, _secondColHandle->sceneLeft());
431 _secondColHandle->setXLimits(_firstColHandle->sceneRight(), width() - minContentsWidth);
434 void ChatScene::setSelectingItem(ChatItem *item) {
435 if(_selectingItem) _selectingItem->clearSelection();
436 _selectingItem = item;
439 void ChatScene::startGlobalSelection(ChatItem *item, const QPointF &itemPos) {
440 _selectionStart = _selectionEnd = _firstSelectionRow = item->row();
441 _selectionStartCol = _selectionMinCol = item->column();
443 _lines[_selectionStart]->setSelected(true, (ChatLineModel::ColumnType)_selectionMinCol);
444 updateSelection(item->mapToScene(itemPos));
447 void ChatScene::updateSelection(const QPointF &pos) {
448 // This is somewhat hacky... we look at the contents item that is at the cursor's y position (ignoring x), since
449 // it has the full height. From this item, we can then determine the row index and hence the ChatLine.
450 ChatItem *contentItem = static_cast<ChatItem *>(itemAt(QPointF(_secondColHandle->sceneRight() + 1, pos.y())));
451 if(!contentItem) return;
453 int curRow = contentItem->row();
455 if(pos.x() > _secondColHandle->sceneRight()) curColumn = ChatLineModel::ContentsColumn;
456 else if(pos.x() > _firstColHandlePos) curColumn = ChatLineModel::SenderColumn;
457 else curColumn = ChatLineModel::TimestampColumn;
459 ChatLineModel::ColumnType minColumn = (ChatLineModel::ColumnType)qMin(curColumn, _selectionStartCol);
460 if(minColumn != _selectionMinCol) {
461 _selectionMinCol = minColumn;
462 for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
463 _lines[l]->setSelected(true, minColumn);
466 int newstart = qMin(curRow, _firstSelectionRow);
467 int newend = qMax(curRow, _firstSelectionRow);
468 if(newstart < _selectionStart) {
469 for(int l = newstart; l < _selectionStart; l++)
470 _lines[l]->setSelected(true, minColumn);
472 if(newstart > _selectionStart) {
473 for(int l = _selectionStart; l < newstart; l++)
474 _lines[l]->setSelected(false);
476 if(newend > _selectionEnd) {
477 for(int l = _selectionEnd+1; l <= newend; l++)
478 _lines[l]->setSelected(true, minColumn);
480 if(newend < _selectionEnd) {
481 for(int l = newend+1; l <= _selectionEnd; l++)
482 _lines[l]->setSelected(false);
485 _selectionStart = newstart;
486 _selectionEnd = newend;
488 if(newstart == newend && minColumn == ChatLineModel::ContentsColumn) {
489 if(!_selectingItem) {
490 // _selectingItem has been removed already
493 _lines[curRow]->setSelected(false);
494 _isSelecting = false;
495 _selectingItem->continueSelecting(_selectingItem->mapFromScene(pos));
499 void ChatScene::mouseMoveEvent(QGraphicsSceneMouseEvent *event) {
500 if(_isSelecting && event->buttons() == Qt::LeftButton) {
501 updateSelection(event->scenePos());
504 QGraphicsScene::mouseMoveEvent(event);
508 void ChatScene::mousePressEvent(QGraphicsSceneMouseEvent *event) {
509 if(_selectionStart >= 0 && event->buttons() == Qt::LeftButton) {
510 for(int l = qMin(_selectionStart, _selectionEnd); l <= qMax(_selectionStart, _selectionEnd); l++) {
511 _lines[l]->setSelected(false);
513 _isSelecting = false;
514 _selectionStart = -1;
515 QGraphicsScene::mousePressEvent(event); // so we can start a new local selection
517 QGraphicsScene::mousePressEvent(event);
521 void ChatScene::mouseReleaseEvent(QGraphicsSceneMouseEvent *event) {
522 if(_isSelecting && !event->buttons() & Qt::LeftButton) {
523 putToClipboard(selectionToString());
524 _isSelecting = false;
527 QGraphicsScene::mouseReleaseEvent(event);
531 void ChatScene::putToClipboard(const QString &selection) {
532 // TODO Configure clipboards
534 QApplication::clipboard()->setText(selection, QClipboard::Selection);
537 QApplication::clipboard()->setText(selection);
541 //!\brief Convert current selection to human-readable string.
542 QString ChatScene::selectionToString() const {
543 //TODO Make selection format configurable!
544 if(!_isSelecting) return QString();
545 int start = qMin(_selectionStart, _selectionEnd);
546 int end = qMax(_selectionStart, _selectionEnd);
547 if(start < 0 || end >= _lines.count()) {
548 qDebug() << "Invalid selection range:" << start << end;
552 for(int l = start; l <= end; l++) {
553 if(_selectionMinCol == ChatLineModel::TimestampColumn)
554 result += _lines[l]->item(ChatLineModel::TimestampColumn).data(MessageModel::DisplayRole).toString() + " ";
555 if(_selectionMinCol <= ChatLineModel::SenderColumn)
556 result += _lines[l]->item(ChatLineModel::SenderColumn).data(MessageModel::DisplayRole).toString() + " ";
557 result += _lines[l]->item(ChatLineModel::ContentsColumn).data(MessageModel::DisplayRole).toString() + "\n";
562 void ChatScene::requestBacklog() {
563 MessageFilter *filter = qobject_cast<MessageFilter*>(model());
565 return filter->requestBacklog();
569 int ChatScene::sectionByScenePos(int x) {
570 if(x < _firstColHandle->x())
571 return ChatLineModel::TimestampColumn;
572 if(x < _secondColHandle->x())
573 return ChatLineModel::SenderColumn;
575 return ChatLineModel::ContentsColumn;
578 void ChatScene::updateSceneRect(qreal width) {
579 if(_lines.isEmpty()) {
580 updateSceneRect(QRectF(0, 0, width, 0));
584 // we hide day change messages at the top by making the scene rect smaller
585 // and by calling QGraphicsItem::hide() on all leading day change messages
586 // the first one is needed to ensure proper scrollbar ranges
587 // the second for cases where the viewport is larger then the set scenerect
588 // (in this case the items are shown anyways)
589 if(_firstLineRow == -1) {
590 int numRows = model()->rowCount();
592 QModelIndex firstLineIdx;
593 while(_firstLineRow < numRows) {
594 firstLineIdx = model()->index(_firstLineRow, 0);
595 if((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) != Message::DayChange)
597 _lines.at(_firstLineRow)->hide();
602 // the following call should be safe. If it crashes something went wrong during insert/remove
603 if(_firstLineRow < _lines.count()) {
604 ChatLine *firstLine = _lines.at(_firstLineRow);
605 ChatLine *lastLine = _lines.last();
606 updateSceneRect(QRectF(0, firstLine->pos().y(), width, lastLine->pos().y() + lastLine->height() - firstLine->pos().y()));
609 updateSceneRect(QRectF(0, 0, width, 0));
613 void ChatScene::updateSceneRect(const QRectF &rect) {
619 bool ChatScene::event(QEvent *e) {
620 if(e->type() == QEvent::ApplicationPaletteChange) {
621 _firstColHandle->setColor(QApplication::palette().windowText().color());
622 _secondColHandle->setColor(QApplication::palette().windowText().color());
624 return QGraphicsScene::event(e);
627 void ChatScene::loadWebPreview(ChatItem *parentItem, const QString &url, const QRectF &urlRect) {
633 if(webPreview.parentItem != parentItem)
634 webPreview.parentItem = parentItem;
636 if(webPreview.url != url) {
637 webPreview.url = url;
638 // load a new web view and delete the old one (if exists)
639 if(webPreview.previewItem && webPreview.previewItem->scene()) {
640 removeItem(webPreview.previewItem);
641 delete webPreview.previewItem;
643 webPreview.previewItem = new WebPreviewItem(url);
644 webPreview.delayTimer.start(2000);
645 webPreview.deleteTimer.stop();
646 } else if(webPreview.previewItem && !webPreview.previewItem->scene()) {
647 // we just have to readd the item to the scene
648 webPreview.delayTimer.start(2000);
649 webPreview.deleteTimer.stop();
651 if(webPreview.urlRect != urlRect) {
652 webPreview.urlRect = urlRect;
653 qreal previewY = urlRect.bottom();
654 qreal previewX = urlRect.x();
655 if(previewY + webPreview.previewItem->boundingRect().height() > sceneRect().bottom())
656 previewY = urlRect.y() - webPreview.previewItem->boundingRect().height();
658 if(previewX + webPreview.previewItem->boundingRect().width() > sceneRect().width())
659 previewX = sceneRect().right() - webPreview.previewItem->boundingRect().width();
661 webPreview.previewItem->setPos(previewX, previewY);
666 void ChatScene::showWebPreviewEvent() {
668 if(webPreview.previewItem)
669 addItem(webPreview.previewItem);
673 void ChatScene::clearWebPreview(ChatItem *parentItem) {
677 if(parentItem == 0 || webPreview.parentItem == parentItem) {
678 if(webPreview.previewItem && webPreview.previewItem->scene()) {
679 removeItem(webPreview.previewItem);
680 webPreview.deleteTimer.start();
682 webPreview.delayTimer.stop();
687 void ChatScene::deleteWebPreviewEvent() {
689 if(webPreview.previewItem) {
690 delete webPreview.previewItem;
691 webPreview.previewItem = 0;
693 webPreview.parentItem = 0;
694 webPreview.url = QString();
695 webPreview.urlRect = QRectF();