Contents

• Public Functions
• Reimplemented Public Functions
• Reimplemented Protected Functions
• Detailed Description

Detailed Description

TheQ3CanvasPolygon class provides a polygon on aQ3Canvas.

Paints a polygon with aQBrush. The polygon's points can be set in the constructor or set or changed later usingsetPoints(). Usepoints() to retrieve the points, orareaPoints() to retrieve the points relative to the canvas's origin.

The polygon can be drawn on a painter withdrawShape().

Like any other canvas item polygons can be moved withQ3CanvasItem::move() andQ3CanvasItem::moveBy(), or by setting coordinates withQ3CanvasItem::setX(),Q3CanvasItem::setY() andQ3CanvasItem::setZ().

Note:Q3CanvasPolygon does not use the pen.

Member Function Documentation

Q3CanvasPolygon::Q3CanvasPolygon(Q3Canvas * canvas)

Constructs a point-less polygon on the canvascanvas. You should callsetPoints() before using it further.

Q3CanvasPolygon::~Q3CanvasPolygon()

Destroys the polygon.

[virtual]Q3PointArray Q3CanvasPolygon::areaPoints() const

Reimplemented fromQ3CanvasPolygonalItem::areaPoints().

Returns the vertices of the polygon translated by the polygon's currentx(),y() position, i.e. relative to the canvas's origin.

See alsosetPoints() andpoints().

[virtual protected]void Q3CanvasPolygon::drawShape(QPainter & p)

Reimplemented fromQ3CanvasPolygonalItem::drawShape().

Draws the polygon using the painterp.

Note thatQ3CanvasPolygon does not support an outline (the pen is always NoPen).

[virtual]void Q3CanvasPolygon::moveBy(double dx,double dy)

Reimplemented fromQ3CanvasItem::moveBy().

Q3PointArray Q3CanvasPolygon::points() const

Returns the vertices of the polygon, not translated by the position.

See alsosetPoints() andareaPoints().

[virtual]int Q3CanvasPolygon::rtti() const

Reimplemented fromQ3CanvasItem::rtti().

Returns 4 (Q3CanvasItem::Rtti_Polygon).

See alsoQ3CanvasItem::rtti().

void Q3CanvasPolygon::setPoints(Q3PointArray pa)

Sets the points of the polygon to bepa. These points will have their x and y coordinates automatically translated byx(),y() as the polygon is moved.

See alsopoints().