Mega Code Archive
Use QPainter to draw arc
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Foundations of Qt Development\Chapter07\circles\main.cpp
/*
* Copyright (c) 2006-2007, Johan Thelin
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* * Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* * Neither the name of APress nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include <QApplication>
#include <QPixmap>
#include <QPainter>
int main( int argc, char **argv )
{
QApplication app( argc, argv );
QPixmap pixmap( 200, 190 );
pixmap.fill( Qt::white );
QPainter painter( &pixmap );
painter.setRenderHint( QPainter::Antialiasing );
painter.setPen( Qt::black );
painter.drawEllipse( 10, 10, 10, 80 );
painter.drawEllipse( 30, 10, 20, 80 );
painter.drawEllipse( 60, 10, 40, 80 );
painter.drawEllipse( QRect( 110, 10, 80, 80 ) );
painter.drawArc( 10, 100, 10, 80, 30*16, 240*16 );
painter.drawArc( 30, 100, 20, 80, 45*16, 200*16 );
painter.drawArc( 60, 100, 40, 80, 60*16, 160*16 );
painter.drawArc( QRect( 110, 100, 80, 80 ), 75*16, 120*16 );
pixmap.save( "circles.png" );
return 0;
}
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