_model(model),
_singleBufferScene(false),
_sceneRect(0, 0, width, 0),
+ _firstLineRow(-1),
_viewportHeight(0),
_selectingItem(0),
_selectionStart(-1),
width,
timestampWidth, senderWidth, contentsWidth,
senderPos, contentsPos);
- line->setPos(0, y+h);
- h += line->height();
+ if(atTop) {
+ h += line->height();
+ line->setPos(0, y-h);
+ } else {
+ line->setPos(0, y+h);
+ h += line->height();
+ }
_lines.insert(i, line);
addItem(line);
}
}
}
- // update sceneRect
- if(atTop || moveTop) {
- updateSceneRect(_sceneRect.adjusted(0, -h, 0, 0));
- } else {
- updateSceneRect(_sceneRect.adjusted(0, 0, 0, h));
+ if(!atBottom) {
+ if(start < _firstLineRow) {
+ int prevFirstLineRow = _firstLineRow + (end - start + 1);
+ for(int i = end + 1; i < prevFirstLineRow; i++) {
+ _lines.at(i)->show();
+ }
+ }
+ // force new search for first proper line
+ _firstLineRow = -1;
+ }
+ updateSceneRect();
+ if(atBottom) {
emit lastLineChanged(_lines.last());
}
}
}
+
// update sceneRect
- if(atTop || moveTop) {
- updateSceneRect(_sceneRect.adjusted(0, h, 0, 0));
- } else {
- updateSceneRect(_sceneRect.adjusted(0, 0, 0, -h));
- }
+ // 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::updateForViewport(qreal width, qreal height) {
// clock_t startT = clock();
qreal linePos = _sceneRect.y() + _sceneRect.height();
- qreal yBottom = linePos;
QList<ChatLine *>::iterator lineIter = _lines.end();
QList<ChatLine *>::iterator lineIterBegin = _lines.begin();
ChatLine *line = 0;
}
}
- updateSceneRect(QRectF(0, linePos, width, yBottom - linePos));
+ updateSceneRect(width);
setHandleXLimits();
// clock_t endT = clock();
int backlogSize = model()->rowCount();
if(isSingleBufferScene() && backlogSize != 0 && _lastBacklogSize + REQUEST_COUNT <= backlogSize) {
QModelIndex msgIdx = model()->index(0, 0);
+ while((Message::Type)(model()->data(msgIdx, ChatLineModel::TypeRole).toInt()) == Message::DayChange) {
+ msgIdx = msgIdx.sibling(msgIdx.row() + 1, 0);
+ }
MsgId msgId = model()->data(msgIdx, ChatLineModel::MsgIdRole).value<MsgId>();
BufferId bufferId = model()->data(msgIdx, ChatLineModel::BufferIdRole).value<BufferId>();
_lastBacklogSize = backlogSize;
return ChatLineModel::ContentsColumn;
}
+void ChatScene::updateSceneRect() {
+ if(_lines.isEmpty()) {
+ updateSceneRect(QRectF(0, 0, _sceneRect.width(), 0));
+ return;
+ }
+
+ // we hide day change messages at the top by making the scene rect smaller
+ // and by calling QGraphicsItem::hide() on all leading day change messages
+ // the first one is needed to ensure proper scrollbar ranges
+ // the second for cases where the viewport is larger then the set scenerect
+ // (in this case the items are shown anyways)
+ if(_firstLineRow == -1) {
+ int numRows = model()->rowCount();
+ _firstLineRow = 0;
+ QModelIndex firstLineIdx;
+ while(_firstLineRow < numRows) {
+ firstLineIdx = model()->index(_firstLineRow, 0);
+ if((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) != Message::DayChange)
+ break;
+ _lines.at(_firstLineRow)->hide();
+ _firstLineRow++;
+ }
+ }
+
+ // the following call should be safe. If it crashes something went wrong during insert/remove
+ ChatLine *firstLine = _lines.at(_firstLineRow);
+ ChatLine *lastLine = _lines.last();
+ updateSceneRect(QRectF(0, firstLine->pos().y(), _sceneRect.width(), lastLine->pos().y() + lastLine->height() - firstLine->pos().y()));
+}
+
+void ChatScene::updateSceneRect(qreal width) {
+ _sceneRect.setWidth(width);
+ updateSceneRect();
+}
+
void ChatScene::updateSceneRect(const QRectF &rect) {
_sceneRect = rect;
setSceneRect(rect);