QtCanvasPolygon Class Reference

The QtCanvasPolygon class provides a polygon on a QtCanvas. More...

#include <QtCanvasPolygon>

Inherits QtCanvasPolygonalItem.

Inherited by QtCanvasSpline.

Public Functions

Protected Functions


Detailed Description

The QtCanvasPolygon class provides a polygon on a QtCanvas.

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 QtCanvasItem::move() and QtCanvasItem::moveBy(), or by setting coordinates with QtCanvasItem::setX(), QtCanvasItem::setY() and QtCanvasItem::setZ().

Note: QtCanvasPolygon does not use the pen.


Member Function Documentation

QtCanvasPolygon::QtCanvasPolygon ( QtCanvas * canvas )

Constructs a point-less polygon on the canvas canvas. You should call setPoints() before using it further.

QtCanvasPolygon::~QtCanvasPolygon ()

Destroys the polygon.

QPolygon QtCanvasPolygon::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.

Reimplemented from QtCanvasPolygonalItem.

See also setPoints() and points().

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

Draws the polygon using the painter p.

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

Reimplemented from QtCanvasPolygonalItem.

QPolygon QtCanvasPolygon::points () const

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

See also setPoints() and areaPoints().

int QtCanvasPolygon::rtti () const   [virtual]

Returns 4 (QtCanvasItem::Rtti_Polygon).

Reimplemented from QtCanvasItem.

See also QtCanvasItem::rtti().

void QtCanvasPolygon::setPoints ( QPolygon 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.

See also points().


Copyright © 2005 Trolltech Trademarks