#include <QGraphicsTextItem>
#include <QScrollBar>
-#include "buffer.h"
#include "chatlinemodelitem.h"
#include "chatscene.h"
#include "chatview.h"
setAlignment(Qt::AlignBottom);
setInteractive(true);
- _scene = new ChatScene(filter, filter->idString(), this);
- connect(_scene, SIGNAL(heightChanged(qreal)), this, SLOT(sceneHeightChanged(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 = 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::sceneHeightChanged(qreal h) {
- Q_UNUSED(h)
- bool scrollable = qAbs(verticalScrollBar()->value() - verticalScrollBar()->maximum()) <= 2; // be a bit tolerant here, also FIXME (why we need this?)
- setSceneRect(scene()->sceneRect());
- if(scrollable) verticalScrollBar()->setValue(verticalScrollBar()->maximum());
+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);
- int relativePos = 100;
- if(vbar->maximum() - vbar->minimum() != 0)
- relativePos = (newPos - vbar->minimum()) * 100 / (vbar->maximum() - vbar->minimum());
+ 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)
+ relativePos = (newPos - vbar->minimum()) * 100 / (vbar->maximum() - vbar->minimum());
- if(relativePos < 20) {
- scene()->requestBacklog();
+ if(relativePos < 20) {
+ scene()->requestBacklog();
+ }
}
+ _lastScrollbarPos = newPos;
}
MsgId ChatView::lastMsgId() const {