+void ChatScene::requestBacklog() {
+ static const int REQUEST_COUNT = 500;
+ 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;
+ Client::backlogManager()->requestBacklog(bufferId, REQUEST_COUNT, msgId.toInt());
+ }
+}
+
+int ChatScene::sectionByScenePos(int x) {
+ if(x < _firstColHandle->x())
+ return ChatLineModel::TimestampColumn;
+ if(x < _secondColHandle->x())
+ return ChatLineModel::SenderColumn;
+
+ return ChatLineModel::ContentsColumn;
+}
+
+void ChatScene::updateSceneRect(qreal width) {
+ if(_lines.isEmpty()) {
+ updateSceneRect(QRectF(0, 0, 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++;
+ }
+ }