ChatView::ChatView(BufferId bufferId, QWidget *parent)
: QGraphicsView(parent),
- AbstractChatView()
+ AbstractChatView(),
+ _currentScaleFactor(1)
{
QList<BufferId> filterList;
filterList.append(bufferId);
ChatView::ChatView(MessageFilter *filter, QWidget *parent)
: QGraphicsView(parent),
- AbstractChatView()
+ AbstractChatView(),
+ _currentScaleFactor(1)
{
init(filter);
}
//setOptimizationFlags(QGraphicsView::DontClipPainter | QGraphicsView::DontAdjustForAntialiasing);
// setOptimizationFlags(QGraphicsView::DontAdjustForAntialiasing);
setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
- setTransformationAnchor(QGraphicsView::NoAnchor);
+ // setTransformationAnchor(QGraphicsView::NoAnchor);
+ setTransformationAnchor(QGraphicsView::AnchorViewCenter);
_scene = new ChatScene(filter, filter->idString(), viewport()->width() - 2, this); // see below: resizeEvent()
connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(sceneRectChanged(const QRectF &)));
- connect(_scene, SIGNAL(lastLineChanged(QGraphicsItem *)), this, SLOT(lastLineChanged(QGraphicsItem *)));
+ connect(_scene, SIGNAL(lastLineChanged(QGraphicsItem *, qreal)), this, SLOT(lastLineChanged(QGraphicsItem *, qreal)));
setScene(_scene);
+ // installEventFilter(_scene);
connect(verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(verticalScrollbarChanged(int)));
}
// we can reduce viewport updates if we scroll to the bottom allready at the beginning
verticalScrollBar()->setValue(verticalScrollBar()->maximum());
- // FIXME: without the hardcoded -2 Qt reserves space for a horizontal scrollbar even though it's disabled permanently.
+ // 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() - 2, viewport()->height());
+ scene()->updateForViewport(viewport()->width() - 4, viewport()->height());
_lastScrollbarPos = verticalScrollBar()->maximum();
verticalScrollBar()->setValue(verticalScrollBar()->maximum());
}
-void ChatView::lastLineChanged(QGraphicsItem *chatLine) {
+void ChatView::lastLineChanged(QGraphicsItem *chatLine, qreal offset) {
+ Q_UNUSED(chatLine)
QAbstractSlider *vbar = verticalScrollBar();
Q_ASSERT(vbar);
- if(vbar->maximum() - vbar->value() <= chatLine->boundingRect().height() + 5) { // 5px grace area
+ if(vbar->maximum() - vbar->value() <= (offset + 5) * _currentScaleFactor ) { // 5px grace area
vbar->setValue(vbar->maximum());
}
}
return model->data(model->index(model->rowCount() - 1, 0), MessageModel::MsgIdRole).value<MsgId>();
}
+
+void ChatView::zoomIn() {
+ _currentScaleFactor *= 1.2;
+ scale(1.2, 1.2);
+ scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
+}
+
+void ChatView::zoomOut() {
+ _currentScaleFactor /= 1.2;
+ scale(1 / 1.2, 1 / 1.2);
+ scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
+}
+
+void ChatView::zoomNormal() {
+ scale(1/_currentScaleFactor, 1/_currentScaleFactor);
+ _currentScaleFactor = 1;
+ scene()->setWidth(viewport()->width() - 2);
+}