_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);
}
}
}
+ if(!atBottom) {
+ // force new search for first proper line
+ _firstLineRow = -1;
+ }
updateSceneRect();
if(atBottom) {
emit lastLineChanged(_lines.last());
// 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()
- if(_lines.isEmpty()) {
- updateSceneRect(QRectF(0, 0, _sceneRect.width(), 0));
- return;
- }
int numRows = model()->rowCount();
QModelIndex firstLineIdx;
- int row = -1;
+ _firstLineRow = -1;
bool needOffset = false;
do {
- row++;
- if(row >= start && row <= end) {
- row = end + 1;
+ _firstLineRow++;
+ if(_firstLineRow >= start && _firstLineRow <= end) {
+ _firstLineRow = end + 1;
needOffset = true;
}
- firstLineIdx = model()->index(row, 0);
- } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && row < numRows);
+ firstLineIdx = model()->index(_firstLineRow, 0);
+ } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && _firstLineRow < numRows);
if(needOffset)
- row -= end - start + 1;
-
- ChatLine *firstLine = _lines.at(row);
- ChatLine *lastLine = _lines.last();
-
- updateSceneRect(QRectF(0, firstLine->pos().y(), _sceneRect.width(), lastLine->pos().y() + lastLine->height() - firstLine->pos().y()));
+ _firstLineRow -= end - start + 1;
+ updateSceneRect();
}
void ChatScene::updateForViewport(qreal width, qreal height) {
}
void ChatScene::updateSceneRect() {
- if(_lines.isEmpty())
+ 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
- int numRows = model()->rowCount();
- int row = -1;
- QModelIndex firstLineIdx;
- do {
- row++;
- firstLineIdx = model()->index(row, 0);
- } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && row < numRows);
+ if(_firstLineRow == -1) {
+ int numRows = model()->rowCount();
+ QModelIndex firstLineIdx;
+ do {
+ _firstLineRow++;
+ firstLineIdx = model()->index(_firstLineRow, 0);
+ } while((Message::Type)(model()->data(firstLineIdx, MessageModel::TypeRole).toInt()) == Message::DayChange && _firstLineRow < numRows);
+ }
// the following call should be safe. If it crashes something went wrong during insert/remove
- ChatLine *firstLine = _lines.at(row);
+ 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()));
}