const qreal minContentsWidth = 200;
+class ClearWebPreviewEvent : public QEvent {
+public:
+ inline ClearWebPreviewEvent() : QEvent(QEvent::User) {}
+};
+
ChatScene::ChatScene(QAbstractItemModel *model, const QString &idString, qreal width, QObject *parent)
: QGraphicsScene(0, 0, width, 0, parent),
_idString(idString),
_model(model),
_singleBufferScene(false),
_sceneRect(0, 0, width, 0),
+ _firstLineRow(-1),
_viewportHeight(0),
_selectingItem(0),
_selectionStart(-1),
if(model->rowCount() > 0)
rowsInserted(QModelIndex(), 0, model->rowCount() - 1);
+
+ webPreview.delayTimer.setSingleShot(true);
+ connect(&webPreview.delayTimer, SIGNAL(timeout()), this, SLOT(showWebPreview()));
}
ChatScene::~ChatScene() {
void ChatScene::rowsInserted(const QModelIndex &index, int start, int end) {
Q_UNUSED(index);
-
- clearWebPreview();
-
// QModelIndex sidx = model()->index(start, 0);
// QModelIndex eidx = model()->index(end, 0);
// qDebug() << "rowsInserted" << start << end << "-" << sidx.data(MessageModel::MsgIdRole).value<MsgId>() << eidx.data(MessageModel::MsgIdRole).value<MsgId>();
QPointF contentsPos(secondColumnHandle()->sceneRight(), 0);
QPointF senderPos(firstColumnHandle()->sceneRight(), 0);
- for(int i = start; i <= end; i++) {
- ChatLine *line = new ChatLine(i, model(),
- width,
- timestampWidth, senderWidth, contentsWidth,
- senderPos, contentsPos);
- line->setPos(0, y+h);
- h += line->height();
- _lines.insert(i, line);
- addItem(line);
+ if(atTop) {
+ for(int i = end; i >= start; i--) {
+ ChatLine *line = new ChatLine(i, model(),
+ width,
+ timestampWidth, senderWidth, contentsWidth,
+ senderPos, contentsPos);
+ h += line->height();
+ line->setPos(0, y-h);
+ _lines.insert(start, line);
+ addItem(line);
+ }
+ } else {
+ for(int i = start; i <= end; i++) {
+ ChatLine *line = new ChatLine(i, model(),
+ width,
+ timestampWidth, senderWidth, contentsWidth,
+ senderPos, contentsPos);
+ line->setPos(0, y+h);
+ h += line->height();
+ _lines.insert(i, line);
+ addItem(line);
+ }
}
// update existing items
moveEnd = end;
} else {
// move bottom part
- moveStart = start;
+ moveStart = end + 1;
}
ChatLine *line = 0;
for(int i = moveStart; i <= moveEnd; i++) {
}
}
+ 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());
void ChatScene::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) {
Q_UNUSED(parent);
- clearWebPreview();
-
qreal h = 0; // total height of removed items;
bool atTop = (start == 0);
// 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);
+ // 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(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()));
}
setSceneRect(rect);
}
+void ChatScene::customEvent(QEvent *event) {
+ if(event->type() != QEvent::User)
+ return;
+
+ event->accept();
+ clearWebPreviewEvent();
+}
void ChatScene::loadWebPreview(ChatItem *parentItem, const QString &url, const QRectF &urlRect) {
#ifndef HAVE_WEBKIT
delete webPreview.previewItem;
}
webPreview.previewItem = new WebPreviewItem(url);
- addItem(webPreview.previewItem);
+ webPreview.delayTimer.start(2000);
}
if(webPreview.urlRect != urlRect) {
webPreview.urlRect = urlRect;
Q_UNUSED(parentItem)
#else
if(parentItem == 0 || webPreview.parentItem == parentItem) {
- if(webPreview.previewItem) {
+ // posting an event ensures that the item will not be removed as
+ // the result of another event. this could result in bad segfaults
+ QCoreApplication::postEvent(this, new ClearWebPreviewEvent());
+ }
+#endif
+}
+
+void ChatScene::showWebPreview() {
+#ifdef HAVE_WEBKIT
+ if(webPreview.previewItem)
+ addItem(webPreview.previewItem);
+#endif
+}
+
+void ChatScene::clearWebPreviewEvent() {
+#ifdef HAVE_WEBKIT
+ if(webPreview.previewItem) {
+ if(!webPreview.delayTimer.isActive())
removeItem(webPreview.previewItem);
- delete webPreview.previewItem;
- webPreview.previewItem = 0;
- }
- webPreview.parentItem = 0;
- webPreview.url = QString();
- webPreview.urlRect = QRectF();
+ else
+ webPreview.delayTimer.stop();
+ delete webPreview.previewItem;
+ webPreview.previewItem = 0;
}
+ webPreview.parentItem = 0;
+ webPreview.url = QString();
+ webPreview.urlRect = QRectF();
#endif
}
projects / quassel.git / blobdiff