Fawkes API Fawkes Development Version
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00001 00002 /*************************************************************************** 00003 * bezier_drawer.cpp - Drawer for the Bezier class 00004 * 00005 * Created: Thu Oct 09 15:08:38 2008 00006 * Copyright 2008 Daniel Beck 00007 * 00008 ****************************************************************************/ 00009 00010 /* This program is free software; you can redistribute it and/or modify 00011 * it under the terms of the GNU General Public License as published by 00012 * the Free Software Foundation; either version 2 of the License, or 00013 * (at your option) any later version. A runtime exception applies to 00014 * this software (see LICENSE.GPL_WRE file mentioned below for details). 00015 * 00016 * This program is distributed in the hope that it will be useful, 00017 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00018 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00019 * GNU Library General Public License for more details. 00020 * 00021 * Read the full text in the LICENSE.GPL_WRE file in the doc directory. 00022 */ 00023 00024 #include <geometry/gtk/bezier_drawer.h> 00025 #include <geometry/bezier.h> 00026 #include <geometry/hom_point.h> 00027 00028 /** @class fawkes::BezierDrawer <geometry/gtk/bezier_drawer.h> 00029 * Drawer for Bezier objects. 00030 * @author Daniel Beck 00031 */ 00032 00033 using namespace std; 00034 00035 namespace fawkes { 00036 00037 /** Constructor. 00038 * @param b the Bezier to draw 00039 */ 00040 BezierDrawer::BezierDrawer(Bezier& b) 00041 { 00042 m_bezier = &b; 00043 } 00044 00045 /** Destructor. */ 00046 BezierDrawer::~BezierDrawer() 00047 { 00048 } 00049 00050 void 00051 BezierDrawer::draw(Cairo::RefPtr<Cairo::Context>& context) 00052 { 00053 vector<HomPoint> points = m_bezier->approximate(); 00054 00055 vector<HomPoint>::const_iterator prev = points.begin(); 00056 vector<HomPoint>::const_iterator cur = prev; 00057 ++cur; 00058 00059 while ( cur != points.end() ) 00060 { 00061 context->save(); 00062 context->move_to( prev->x(), prev->y() ); 00063 context->line_to( cur->x(), cur->y() ); 00064 context->restore(); 00065 00066 ++prev; 00067 ++cur; 00068 } 00069 00070 context->stroke(); 00071 } 00072 00073 } // end namespace fawkes