void ChatView::init(MessageFilter *filter) {
setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
+ setVerticalScrollBarPolicy(Qt::ScrollBarAsNeeded);
setAlignment(Qt::AlignBottom);
setInteractive(true);
//setOptimizationFlags(QGraphicsView::DontClipPainter | QGraphicsView::DontAdjustForAntialiasing);
_scrollTimer.setSingleShot(true);
connect(&_scrollTimer, SIGNAL(timeout()), SLOT(scrollTimerTimeout()));
- _scene = new ChatScene(filter, filter->idString(), viewport()->width() - 4, this); // see below: resizeEvent()
- connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(sceneRectChanged(const QRectF &)));
+ _scene = new ChatScene(filter, filter->idString(), viewport()->width(), this);
+ connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(adjustSceneRect()));
connect(_scene, SIGNAL(lastLineChanged(QGraphicsItem *, qreal)), this, SLOT(lastLineChanged(QGraphicsItem *, qreal)));
connect(_scene, SIGNAL(mouseMoveWhileSelecting(const QPointF &)), this, SLOT(mouseMoveWhileSelecting(const QPointF &)));
setScene(_scene);
// we can reduce viewport updates if we scroll to the bottom allready at the beginning
verticalScrollBar()->setValue(verticalScrollBar()->maximum());
-
- // FIXME: without the hardcoded -4 Qt reserves space for a horizontal scrollbar even though it's disabled permanently.
- // this does only occur on QtX11 (at least not on Qt for Mac OS). Seems like a Qt Bug.
- scene()->updateForViewport(viewport()->width() - 4, viewport()->height());
+ scene()->updateForViewport(viewport()->width(), viewport()->height());
+ adjustSceneRect();
_lastScrollbarPos = verticalScrollBar()->maximum();
verticalScrollBar()->setValue(verticalScrollBar()->maximum());
}
+// Workaround for QTBUG-6322
+// The viewport rect gets some margins where it shouldn't, resulting in scrollbars to appear
+void ChatView::adjustSceneRect() {
+ static qreal voffset = 0;
+ static bool offsetStable = false;
+
+ QRectF rect = scene()->sceneRect();
+ if(rect.height() <= viewport()->height()) {
+ setSceneRect(rect);
+ return;
+ }
+ if(offsetStable && rect.height() > viewport()->height())
+ setSceneRect(rect.adjusted(0, 0, 0, voffset));
+ else {
+ setSceneRect(rect);
+
+ QScrollBar *vbar = verticalScrollBar();
+ qreal sceneHeight = rect.height();
+ qreal viewHeight = vbar->maximum() + viewport()->height() - vbar->minimum();
+ if(sceneHeight != viewHeight) {
+ voffset = sceneHeight - viewHeight;
+ // qDebug() << "Adjusting ChatView offset to" << voffset << "(QTBUG-6322)";
+ if(sceneHeight + voffset <= viewport()->height()) {
+ setSceneRect(rect.adjusted(0, -voffset, 0, 0));
+ offsetStable = false;
+ return;
+ } else
+ setSceneRect(rect.adjusted(0, 0, 0, voffset));
+ }
+ if(vbar->maximum() + viewport()->height() - vbar->minimum() != sceneHeight)
+ qWarning() << "Workaround for QTBUG-6322 failed!1!!" << vbar->maximum() + viewport()->height() - vbar->minimum() << sceneHeight;
+ else
+ offsetStable = true;
+ }
+}
+
void ChatView::mouseMoveWhileSelecting(const QPointF &scenePos) {
int y = (int)mapFromScene(scenePos).y();
_scrollOffset = 0;