qcanvasellipse.3qt

Trolltech公司发布的基于C++图形开发环境

'\" t
.TH QCanvasEllipse 3qt "24 January 2005" "Trolltech AS" \" -*- nroff -*-
.\" Copyright 1992-2001 Trolltech AS.  All rights reserved.  See the
.\" license file included in the distribution for a complete license
.\" statement.
.\"
.ad l
.nh
.SH NAME
QCanvasEllipse \- An ellipse with a movable center point
.br
.PP
\fC#include <qcanvas.h>\fR
.PP
Inherits QCanvasPolygonalItem.
.PP
.SS "Public Members"
.in +1c
.ti -1c
.BI "\fBQCanvasEllipse\fR ( QCanvas * canvas ) "
.br
.ti -1c
.BI "\fBQCanvasEllipse\fR ( int " "width" ", int " "height" ", QCanvas * canvas ) "
.br
.ti -1c
.BI "\fBQCanvasEllipse\fR ( int " "width" ", int " "height" ", int " "startangle" ", int " "angle" ", QCanvas * canvas ) "
.br
.ti -1c
.BI "\fB~QCanvasEllipse\fR () "
.br
.ti -1c
.BI "int \fBwidth\fR () const"
.br
.ti -1c
.BI "int \fBheight\fR () const"
.br
.ti -1c
.BI "void \fBsetSize\fR ( int " "w" ", int h ) "
.br
.ti -1c
.BI "void \fBsetAngles\fR ( int " "start" ", int length ) "
.br
.ti -1c
.BI "int \fBangleStart\fR () const"
.br
.ti -1c
.BI "int \fBangleLength\fR () const"
.br
.ti -1c
.BI "virtual int \fBrtti\fR () const"
.br
.in -1c
.SS "Protected Members"
.in +1c
.ti -1c
.BI "virtual void \fBdrawShape\fR ( QPainter & ) "
.br
.in -1c
.SH DESCRIPTION
An ellipse with a movable center point.
.PP
Paints an ellipse or "pie segment" with a QBrush.
.SH MEMBER FUNCTION DOCUMENTATION
.SH "QCanvasEllipse::QCanvasEllipse ( QCanvas * canvas )"
Constructs a 32x32 ellipse, centered at (0,0) on \fIcanvas.\fR
.SH "QCanvasEllipse::QCanvasEllipse ( int width, int height, QCanvas * canvas )"
Constructs a \fIwidth\fR by \fIheight\fR pixel ellipse, centered at (0,0) on \fIcanvas.\fR
.SH "QCanvasEllipse::QCanvasEllipse ( int width, int height, int startangle, int angle, QCanvas * canvas )"
Constructs a \fIwidth\fR by \fIheight\fR pixel ellipse, centered at (0,0) on \fIcanvas,\fR starting at angle \fIstartangle,\fR extending for angle \fIangle. startangle\fR and \fIangle\fR are in 1/16 degrees.
.SH "QCanvasEllipse::~QCanvasEllipse ()"
Destructs the ellipse.
.SH "int QCanvasEllipse::angleLength () const"
Returns the length angle in 1/16 degrees. Initially this will be 360*16 - ie. a solid ellipse.
.PP
See also setAngles() and angleStart().
.SH "int QCanvasEllipse::angleStart () const"
Returns the start angle in 1/16 degrees. Initially this will be 0.
.PP
See also setAngles() and angleLength().
.SH "QPointArray QCanvasEllipse::areaPoints () const \fC[virtual]\fR"
Reimplemented for internal reasons; the API is not affected.
.PP
Reimplemented from QCanvasPolygonalItem.
.SH "bool QCanvasEllipse::collidesWith ( const QCanvasItem * i ) const \fC[virtual]\fR"
Reimplemented for internal reasons; the API is not affected.
.PP
Reimplemented from QCanvasItem.
.SH "void QCanvasEllipse::drawShape ( QPainter & p ) \fC[virtual protected]\fR"
Draws the ellipse, centered at x(), y().
.PP
Note that QCanvasPolygon does not support an outline (pen is always NoPen).
.PP
Reimplemented from QCanvasPolygonalItem.
.SH "int QCanvasEllipse::height () const"
Returns the height of the ellipse.
.SH "int QCanvasEllipse::rtti () const \fC[virtual]\fR"
Returns 6.
.PP
See also QCanvasItem::rtti().
.PP
Reimplemented from QCanvasItem.
.SH "void QCanvasEllipse::setAngles ( int start, int length )"
Sets the angles for the ellipse to start at \fIstart\fR and continue for \fIlength\fR units. Each unit is 1/16 of a degree. By default the ellipse will start at 0 and have length 360*16 - ie. a solid ellipse.
.PP
See also angleStart() and angleLength().
.SH "void QCanvasEllipse::setSize ( int width, int height )"
Sets the \fIwidth\fR and \fIheight\fR of the ellipse.
.SH "int QCanvasEllipse::width () const"
Returns the width of the ellipse.
.SH "SEE ALSO"
.BR http://doc.trolltech.com/qcanvasellipse.html
.BR http://www.trolltech.com/faq/tech.html
.SH COPYRIGHT
Copyright 1992-2001 Trolltech AS, http://www.trolltech.com.  See the
license file included in the distribution for a complete license
statement.
.SH AUTHOR
Generated automatically from the source code.
.SH BUGS
If you find a bug in Qt, please report it as described in
.BR http://doc.trolltech.com/bughowto.html .
Good bug reports make our job much simpler. Thank you.
.P
In case of content or formattting problems with this manual page, please
report them to
.BR [e-mail] .
Please include the name of the manual page (qcanvasellipse.3qt) and the Qt
version (2.3.10).