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Mutualize code

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git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5427 bfdf4180-ca20-0410-9c96-a3a8aa849046
This commit is contained in:
blacksun
2018-07-03 14:25:46 +00:00
parent ed7090f6fb
commit 57e5ccd943
4 changed files with 73 additions and 94 deletions
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55
sources/QetGraphicsItemModeler/qetgraphicshandlerutility.cpp
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@@ -186,3 +186,58 @@ QLineF QetGraphicsHandlerUtility::lineForPosAtIndex(const QLineF &old_line, cons
index == 0 ? line.setP1(pos) : line.setP2(pos);
return line;
}
/**
* @brief QetGraphicsHandlerUtility::polygonForInsertPoint
* @param old_polygon : the polygon which we insert a new point.
* @param closed : polygon is closed or not
* @param pos : the pos where the new point must be added
* @return the new polygon
*/
QPolygonF QetGraphicsHandlerUtility::polygonForInsertPoint(const QPolygonF &old_polygon, bool closed, const QPointF &pos)
{
qreal max_angle = 0;
int index = 0;
for (int i=1 ; i<old_polygon.size() ; i++)
{
QPointF A = old_polygon.at(i-1);
QPointF B = old_polygon.at(i);
QLineF line_a(A, pos);
QLineF line_b(pos, B);
qreal angle = line_a.angleTo(line_b);
if(angle<180)
angle = 360-angle;
if (i==1)
{
max_angle = angle;
index=i;
}
if (angle > max_angle)
{
max_angle = angle;
index=i;
}
}
//Special case when polygon is close
if (closed)
{
QLineF line_a(old_polygon.last(), pos);
QLineF line_b(pos, old_polygon.first());
qreal angle = line_a.angleTo(line_b);
if (angle<180)
angle = 360-angle;
if (angle > max_angle)
{
max_angle = angle;
index=old_polygon.size();
}
}
QPolygonF polygon = old_polygon;
polygon.insert(index, pos);
return polygon;
}