void DlgSettingsCurveProperties::drawLine (bool isRelation,
const LineStyle &lineStyle)
{
const double Z_LINE = -1.0; // Looks nicer if line goes under the points, so points are unobscured
// Line between points. Start with function connection
QPainterPath path;
QPointF p0 (POS_LEFT), p1 (POS_CENTER), p2 (POS_RIGHT);
if (isRelation) {
// Relation connection
p1 = POS_RIGHT;
p2 = POS_CENTER;
}
// Draw straight or smooth
if (lineStyle.curveConnectAs() == CONNECT_AS_FUNCTION_SMOOTH ||
lineStyle.curveConnectAs() == CONNECT_AS_RELATION_SMOOTH) {
vector<double> t;
vector<SplinePair> xy;
t.push_back(0);
t.push_back(1);
t.push_back(2);
xy.push_back (SplinePair (p0.x(), p0.y()));
xy.push_back (SplinePair (p1.x(), p1.y()));
xy.push_back (SplinePair (p2.x(), p2.y()));
Spline spline (t, xy);
path.moveTo (p0);
path.cubicTo (QPointF (spline.p1(0).x(),
spline.p1(0).y()),
QPointF (spline.p2(0).x(),
spline.p2(0).y()),
p1);
path.cubicTo (QPointF (spline.p1(1).x(),
spline.p1(1).y()),
QPointF (spline.p2(1).x(),
spline.p2(1).y()),
p2);
} else {
path.moveTo (p0);
path.lineTo (p1);
path.lineTo (p2);
}
QGraphicsPathItem *line = new QGraphicsPathItem (path);
line->setPen (QPen (QBrush (ColorPaletteToQColor (lineStyle.paletteColor())),
lineStyle.width()));
line->setZValue (Z_LINE);
m_scenePreview->addItem (line);
}
QPainterPath GraphicsLinesForCurve::drawLinesSmooth ()
{
LOG4CPP_INFO_S ((*mainCat)) << "GraphicsLinesForCurve::drawLinesSmooth"
<< " curve=" << m_curveName.toLatin1().data();
QPainterPath path;
// Prepare spline inputs. Note that the ordinal values may not start at 0
vector<double> t;
vector<SplinePair> xy;
OrdinalToGraphicsPoint::const_iterator itr;
for (itr = m_graphicsPoints.begin(); itr != m_graphicsPoints.end(); itr++) {
double ordinal = itr.key();
const GraphicsPoint *point = itr.value();
t.push_back (ordinal);
xy.push_back (SplinePair (point->pos ().x(),
point->pos ().y()));
}
// Spline through points
Spline spline (t, xy);
// Drawing from point i-1 to this point i uses the control points from point i-1
int segmentEndingAtPointI = 0;
// Create QPainterPath through the points
bool isFirst = true;
for (itr = m_graphicsPoints.begin(); itr != m_graphicsPoints.end(); itr++) {
const GraphicsPoint *point = itr.value();
if (isFirst) {
isFirst = false;
path.moveTo (point->pos());
} else {
QPointF p1 (spline.p1 (segmentEndingAtPointI).x(),
spline.p1 (segmentEndingAtPointI).y());
QPointF p2 (spline.p2 (segmentEndingAtPointI).x(),
spline.p2 (segmentEndingAtPointI).y());
path.cubicTo (p1,
p2,
point->pos ());
++segmentEndingAtPointI;
}
}
return path;
}
QPainterPath GraphicsLinesForCurve::drawLinesSmooth (const OrdinalToPointIdentifier &ordinalToPointIdentifier)
{
LOG4CPP_INFO_S ((*mainCat)) << "GraphicsLinesForCurve::drawLinesSmooth";
QPainterPath path;
// Prepare spline inputs. Note that the ordinal values may not start at 0
vector<double> t;
vector<SplinePair> xy;
OrdinalToPointIdentifier::const_iterator itr;
for (itr = ordinalToPointIdentifier.begin(); itr != ordinalToPointIdentifier.end(); itr++) {
const QString pointIdentifier = itr.value();
const Point &point = m_graphicsPoints [pointIdentifier];
t.push_back (point.ordinal ());
xy.push_back (SplinePair (point.posScreen ().x(),
point.posScreen ().y()));
}
// Spline through points
Spline spline (t, xy);
// Drawing from point i-1 to this point i uses the control points from point i-1
int segmentEndingAtPointI = 0;
// Create QPainterPath through the points
bool isFirst = true;
for (itr = ordinalToPointIdentifier.begin(); itr != ordinalToPointIdentifier.end(); itr++) {
const QString pointIdentifier = itr.value();
const Point &point = m_graphicsPoints [pointIdentifier];
if (isFirst) {
isFirst = false;
path.moveTo (point.posScreen());
} else {
QPointF p1 (spline.p1 (segmentEndingAtPointI).x(),
spline.p1 (segmentEndingAtPointI).y());
QPointF p2 (spline.p2 (segmentEndingAtPointI).x(),
spline.p2 (segmentEndingAtPointI).y());
path.cubicTo (p1,
p2,
point.posScreen());
++segmentEndingAtPointI;
}
}
return path;
}
