Detailed Description
The QCanvasPolygon class provides a polygon on a QCanvas.
Paints a polygon with a QBrush. The polygon's points can be set in the
constructor or set or changed later using setPoints(). Use points() to
retrieve the points, or areaPoints() to retrieve the points relative
to the canvas's origin.
The polygon can be drawn on a painter with drawShape().
Like any other canvas item polygons can be moved with
QCanvasItem::move() and QCanvasItem::moveBy(), or by setting coordinates
with QCanvasItem::setX(), QCanvasItem::setY() and QCanvasItem::setZ().
See also Graphics Classes and Image Processing Classes.
Member Function Documentation
QCanvasPolygon::QCanvasPolygon ( QCanvas * canvas )
Constructs a point-less polygon on the canvas canvas.
You should call setPoints() before
using it further.
QCanvasPolygon::~QCanvasPolygon ()
Destroys the polygon.
QPointArray QCanvasPolygon::areaPoints () const [virtual]
Returns the vertices of the polygon translated by the polygon's
current x(), y() position, i.e. relative to the canvas's origin.
See also setPoints() and points().
Reimplemented from QCanvasPolygonalItem.
void QCanvasPolygon::drawShape ( QPainter & p ) [virtual protected]
Draws the polygon using the painter p.
Note that QCanvasPolygon does not support an outline (pen is
always NoPen).
Reimplemented from QCanvasPolygonalItem.
QPointArray QCanvasPolygon::points () const
Returns the vertices of the polygon, not translated by the position.
See also setPoints() and areaPoints().
int QCanvasPolygon::rtti () const [virtual]
Returns 4 (QCanvasItem::Rtti_Polygon).
See also QCanvasItem::rtti().
Reimplemented from QCanvasPolygonalItem.
Reimplemented in QCanvasSpline.
void QCanvasPolygon::setPoints ( QPointArray pa )
Sets the points of the polygon to be pa. These points will have
their x and y coordinates automatically translated by x(), y() as the
polygon is moved.
This file is part of the Qt toolkit.
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