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Drawing performance improvement

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This commit is contained in:
Martin Tůma 2016-09-11 17:15:23 +02:00
parent eeed5ceba3
commit ebf3c3bc14
6 changed files with 10 additions and 4 deletions
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2
src/axisitem.cpp
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@ -34,6 +34,8 @@ AxisItem::AxisItem(Type type, QGraphicsItem *parent) : QGraphicsItem(parent)
{
_type = type;
_size = 0;
setCacheMode(QGraphicsItem::DeviceCoordinateCache);
}
void AxisItem::setRange(const RangeF &range)

1
src/routeitem.cpp
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@ -53,6 +53,7 @@ RouteItem::RouteItem(const Route &route, QGraphicsItem *parent)
setToolTip(toolTip());
setCursor(Qt::ArrowCursor);
setAcceptHoverEvents(true);
setCacheMode(QGraphicsItem::DeviceCoordinateCache);
updateShape();

5
src/scaleitem.cpp
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@ -17,6 +17,8 @@ ScaleItem::ScaleItem(QGraphicsItem *parent) : QGraphicsItem(parent)
_units = Metric;
_zoom = ZOOM_MIN;
_lat = 0;
setCacheMode(QGraphicsItem::DeviceCoordinateCache);
}
void ScaleItem::updateBoundingRect()
@ -112,9 +114,10 @@ void ScaleItem::computeScale()
}
}
void ScaleItem::setLatitude(qreal lat)
void ScaleItem::setZoom(int z, qreal lat)
{
prepareGeometryChange();
_zoom = z;
_lat = lat;
computeScale();
updateBoundingRect();

2
src/scaleitem.h
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@ -13,8 +13,8 @@ public:
void paint(QPainter *painter, const QStyleOptionGraphicsItem *option,
QWidget *widget);
void setLatitude(qreal lat);
void setZoom(int z);
void setZoom(int z, qreal lat);
void setUnits(enum Units units);
private:

1
src/trackitem.cpp
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@ -53,6 +53,7 @@ TrackItem::TrackItem(const Track &track, QGraphicsItem *parent)
setToolTip(toolTip());
setCursor(Qt::ArrowCursor);
setAcceptHoverEvents(true);
setCacheMode(QGraphicsItem::DeviceCoordinateCache);
updateShape();

3
src/trackview.cpp
View File

@ -136,8 +136,7 @@ void TrackView::loadGPX(const GPX &gpx)
_scene->setSceneRect(ba);
centerOn(ba.center());
_mapScale->setLatitude(-(br.center().ry() * _scale));
_mapScale->setZoom(_zoom);
_mapScale->setZoom(_zoom, -(br.center().ry() * _scale));
if (_mapScale->scene() != _scene)
_scene->addItem(_mapScale);
}