shapefactory.cpp
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#include "shapefactory.h"
QPainterPath ShapeFactory::path( Shape shape,
const QPointF &pos, const QSizeF &size )
{
QRectF rect;
rect.setSize( size );
rect.moveCenter( pos );
QPainterPath path;
switch( shape )
{
case Rect:
{
path.addRect( rect );
break;
}
case Triangle:
{
QPolygonF triangle;
triangle += rect.bottomLeft();
triangle += QPointF( rect.center().x(), rect.top() );
triangle += rect.bottomRight();
path.addPolygon( triangle );
break;
}
case Ellipse:
{
path.addEllipse( rect );
break;
}
case Ring:
{
path.addEllipse( rect );
const double w = 0.25 * rect.width();
path.addEllipse( rect.adjusted( w, w, -w, -w ) );
break;
}
case Star:
{
const double cos30 = 0.866025;
const double dy = 0.25 * size.height();
const double dx = 0.5 * size.width() * cos30 / 3.0;
double x1 = pos.x() - 3 * dx;
double y1 = pos.y() - 2 * dy;
const double x2 = x1 + 1 * dx;
const double x3 = x1 + 2 * dx;
const double x4 = x1 + 3 * dx;
const double x5 = x1 + 4 * dx;
const double x6 = x1 + 5 * dx;
const double x7 = x1 + 6 * dx;
const double y2 = y1 + 1 * dy;
const double y3 = y1 + 2 * dy;
const double y4 = y1 + 3 * dy;
const double y5 = y1 + 4 * dy;
QPolygonF star;
star += QPointF( x4, y1 );
star += QPointF( x5, y2 );
star += QPointF( x7, y2 );
star += QPointF( x6, y3 );
star += QPointF( x7, y4 );
star += QPointF( x5, y4 );
star += QPointF( x4, y5 );
star += QPointF( x3, y4 );
star += QPointF( x1, y4 );
star += QPointF( x2, y3 );
star += QPointF( x1, y2 );
star += QPointF( x3, y2 );
path.addPolygon( star );
break;
}
case Hexagon:
{
const double cos30 = 0.866025;
const double dx = 0.5 * size.width() - cos30;
const double dy = 0.25 * size.height();
double x1 = pos.x() - dx;
double y1 = pos.y() - 2 * dy;
const double x2 = x1 + 1 * dx;
const double x3 = x1 + 2 * dx;
const double y2 = y1 + 1 * dy;
const double y3 = y1 + 3 * dy;
const double y4 = y1 + 4 * dy;
QPolygonF hexagon;
hexagon += QPointF( x2, y1 );
hexagon += QPointF( x3, y2 );
hexagon += QPointF( x3, y3 );
hexagon += QPointF( x2, y4 );
hexagon += QPointF( x1, y3 );
hexagon += QPointF( x1, y2 );
path.addPolygon( hexagon );
break;
}
};
path.closeSubpath();
return path;
}