connect(verticalScrollBar(), &QAbstractSlider::valueChanged, this, &ChatView::verticalScrollbarChanged);
_lastScrollbarPos = verticalScrollBar()->maximum();
+ // Workaround for the ChatView scrolling up a fair bit when scrollbar becomes visible
+ verticalScrollBar()->installEventFilter(this);
+
connect(Client::networkModel(), &NetworkModel::markerLineSet, this, &ChatView::markerLineSet);
// only connect if client is synched with a core
return QGraphicsView::event(event);
}
+bool ChatView::eventFilter(QObject* watched, QEvent* event)
+{
+ QAbstractSlider* vbar = verticalScrollBar();
+ Q_ASSERT(vbar);
+
+ if (watched != vbar) {
+ // Ignore and pass through all events not featuring the scrollbar
+ return false;
+ }
+ if (event->type() == QEvent::Show) {
+ // FIXME: Workaround for the ChatView scrolling up a fair bit when transitioning from the
+ // vertical scrollbar not being visible, to becoming visible. This happens especially
+ // often when no initial backlog is loaded.
+ if (_backlogRequestedBeforeScrollable) {
+ _backlogRequestedBeforeScrollable = false;
+ vbar->setValue(vbar->maximum());
+ }
+ }
+ // Pass through all events
+ return false;
+}
+
void ChatView::resizeEvent(QResizeEvent* event)
{
// if view is currently scrolled to bottom, we want it that way after resizing
// Future improvement: continue fetching backlog in chunks until the scrollbar is visible,
// or the beginning of the buffer has been reached.
scene()->requestBacklog();
+ _backlogRequestedBeforeScrollable = true;
// Backlog has been requested
return true;
}