- // force new search for first proper line
- _firstLineRow = -1;
- }
- updateSceneRect();
- if(atBottom || (!atTop && !moveTop)) {
- emit lastLineChanged(_lines.last(), h);
- }
-}
-
-void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
- Q_UNUSED(parent);
-
- qreal h = 0; // total height of removed items;
-
- bool atTop = (start == 0);
- bool atBottom = (end == _lines.count() - 1);
- bool moveTop = false;
-
- // clear selection
- if(_selectingItem) {
- int row = _selectingItem->row();
- if(row >= start && row <= end)
- setSelectingItem(0);
- }
-
- // remove items from scene
- QList<ChatLine *>::iterator lineIter = _lines.begin() + start;
- int lineCount = start;
- while(lineIter != _lines.end() && lineCount <= end) {
- h += (*lineIter)->height();
- delete *lineIter;
- lineIter = _lines.erase(lineIter);
- lineCount++;
- }
-
- // update rows of remaining chatlines
- for(int i = start; i < _lines.count(); i++) {
- _lines.at(i)->setRow(i);
- }
-
- // update selection
- if(_selectionStart >= 0) {
- int offset = end - start + 1;
- if(_selectionStart >= start)
- _selectionStart = qMax(_selectionStart -= offset, start);
- if(_selectionEnd >= start)
- _selectionEnd -= offset;
- if(_firstSelectionRow >= start)
- _firstSelectionRow -= offset;
-
- if(_selectionEnd < _selectionStart) {
- _isSelecting = false;
- _selectionStart = -1;
- }
- }
-
- // neither removing at bottom or top means we have to move items...
- if(!(atTop || atBottom)) {
- qreal offset = h;
- int moveStart = 0;
- int moveEnd = _lines.count() - 1;
- if(start < _lines.count() - start) {
- // move top part
- moveTop = true;
- moveEnd = start - 1;
- } else {
- // move bottom part
- moveStart = start;
- offset = -offset;
- }
- ChatLine *line = 0;
- for(int i = moveStart; i <= moveEnd; i++) {
- line = _lines.at(i);
- line->setPos(0, line->pos().y() + offset);
- }
- }
-
- Q_ASSERT(start == 0 || start >= _lines.count() || _lines.at(start - 1)->pos().y() + _lines.at(start - 1)->height() == _lines.at(start)->pos().y());
-
- // update sceneRect
- // when searching for the first non-date-line we have to take into account that our
- // model still contains the just removed lines so we cannot simply call updateSceneRect()
- int numRows = model()->rowCount();
- QModelIndex firstLineIdx;
- _firstLineRow = -1;
- bool needOffset = false;
- do {
- _firstLineRow++;
- if(_firstLineRow >= start && _firstLineRow <= end) {
- _firstLineRow = end + 1;
- needOffset = true;
- }
- firstLineIdx = model()->index(_firstLineRow, 0);
- } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && _firstLineRow < numRows);
-
- if(needOffset)
- _firstLineRow -= end - start + 1;
- updateSceneRect();
-}
-
-void ChatScene::dataChanged(const QModelIndex &tl, const QModelIndex &br) {
- layout(tl.row(), br.row(), _sceneRect.width());
-}
-
-void ChatScene::updateForViewport(qreal width, qreal height) {
- _viewportHeight = height;
- setWidth(width);
-}
-
-void ChatScene::setWidth(qreal width) {
- if(width == _sceneRect.width())
- return;
- layout(0, _lines.count()-1, width);