setAlignment(Qt::AlignBottom);
setInteractive(true);
- _scene = new ChatScene(filter, filter->idString(), this);
- connect(_scene, SIGNAL(heightChangedAt(qreal, qreal)), this, SLOT(sceneHeightChangedAt(qreal, qreal)));
+ _scene = new ChatScene(filter, filter->idString(), viewport()->width() - 2, this); // see below: resizeEvent()
+ connect(_scene, SIGNAL(sceneHeightChanged(qreal)), this, SLOT(sceneHeightChanged(qreal)));
+ connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(sceneRectChanged(const QRectF &)));
setScene(_scene);
- _lastScrollbarPos = 0;
+ _lastScrollbarPos = verticalScrollBar()->maximum();
connect(verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(verticalScrollbarChanged(int)));
}
void ChatView::resizeEvent(QResizeEvent *event) {
- scene()->setWidth(event->size().width() - 2); // FIXME figure out why we have to hardcode the -2 here
+ QGraphicsView::resizeEvent(event);
+ scene()->setWidth(viewport()->width() - 2); // FIXME figure out why we have to hardcode the -2 here -> Qt-Bug most probably
verticalScrollBar()->setValue(verticalScrollBar()->maximum());
}
-void ChatView::sceneHeightChangedAt(qreal ypos, qreal hdiff) {
- setSceneRect(scene()->sceneRect());
- int y = mapFromScene(0, ypos).y();
- if(y <= viewport()->height() + 2) { // be a bit tolerant here, also FIXME (why we need the 2px?)
- verticalScrollBar()->setValue(verticalScrollBar()->value() + hdiff);
- }
+void ChatView::sceneHeightChanged(qreal dh) {
+ QAbstractSlider *vbar = verticalScrollBar();
+ Q_ASSERT(vbar);
+ if(vbar->maximum() - vbar->value() <= dh + 5) // in case we had scrolled only about half a line to the bottom we allow a grace of 5
+ vbar->setValue(vbar->maximum());
}
void ChatView::verticalScrollbarChanged(int newPos) {
QAbstractSlider *vbar = verticalScrollBar();
Q_ASSERT(vbar);
+ if(vbar->maximum() - vbar->value() <= 5) // FIXME workaround the fact that the view gets scrolled up a few px on buffer change
+ vbar->setValue(vbar->maximum());
+
if(newPos < _lastScrollbarPos) {
int relativePos = 100;
if(vbar->maximum() - vbar->minimum() != 0)