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hom_vector_drawer.cpp
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/***************************************************************************
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* hom_vector_drawer.cpp - Drawer for the HomVector class
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*
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* Created: Thu Oct 16 18:00:59 2008
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* Copyright 2008 Daniel Beck
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*
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****************************************************************************/
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/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. A runtime exception applies to
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* this software (see LICENSE.GPL_WRE file mentioned below for details).
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* Read the full text in the LICENSE.GPL_WRE file in the doc directory.
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*/
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#include <geometry/gtk/hom_vector_drawer.h>
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#include <geometry/hom_vector.h>
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#include <geometry/hom_point.h>
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/** @class fawkes::HomVectorDrawer <geometry/gtk/hom_vector_drawer.h>
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* Drawer for HomVector objects. In order to draw a vector an
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* additional offset point needs to be given.
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* @author Daniel Beck
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*/
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namespace
fawkes {
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/** Constructor.
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* @param v a HomVector.
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*/
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HomVectorDrawer::HomVectorDrawer
(
HomVector
& v)
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{
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m_vector = &v;
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m_offset = NULL;
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m_manager =
false
;
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}
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/** Constructor.
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* @param v a HomVector.
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* @param offset an offset point
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*/
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HomVectorDrawer::HomVectorDrawer
(
HomVector
& v,
HomPoint
& offset)
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{
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m_vector = &v;
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m_offset = &offset;
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m_manager =
false
;
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}
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/** Constructor.
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* This constructor creates a copy of the vector to draw.
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* @param v a HomVector
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*/
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HomVectorDrawer::HomVectorDrawer
(
const
HomVector
& v)
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{
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m_vector =
new
HomVector
(v);
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m_offset = NULL;
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m_manager =
true
;
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}
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/** Constructor.
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* This constructor creates copies of the vector and the offset.
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* @param v a HomVector.
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* @param offset an offset point
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*/
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HomVectorDrawer::HomVectorDrawer
(
const
HomVector
& v,
const
HomPoint
& offset)
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{
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m_vector =
new
HomVector
(v);
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m_offset =
new
HomPoint
(offset);
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m_manager =
true
;
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}
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/** Copy constructor.
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* @param d another HomVectorDrawer
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*/
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HomVectorDrawer::HomVectorDrawer
(
const
HomVectorDrawer
& d)
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{
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m_vector =
new
HomVector
( *d.m_vector );
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m_offset =
new
HomPoint
( *d.m_offset );
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m_manager =
true
;
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}
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/** Destrcutor. */
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HomVectorDrawer::~HomVectorDrawer
()
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{
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if
(m_manager)
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{
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delete
m_vector;
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delete
m_offset;
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}
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}
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void
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HomVectorDrawer::draw
(Cairo::RefPtr<Cairo::Context>& context)
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{
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context->save();
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HomPoint
start, end;
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if
(m_offset)
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{
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start =
HomPoint
( m_offset->
x
(), m_offset->
y
() );
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end =
HomPoint
( m_offset->
x
() + m_vector->
x
(),
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m_offset->
y
() + m_vector->
y
() );
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}
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else
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{
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start =
HomPoint
( 0.0, 0.0 );
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end =
HomPoint
( m_vector->
x
(), m_vector->
y
() );
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}
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context->
move_to
( start.
x
(), start.
y
() );
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context->line_to( end.
x
() , end.
y
() );
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context->arc( end.
x
(), end.
y
(), 0.06, 0.0, 2.0 * M_PI);
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context->fill();
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context->stroke();
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context->restore();
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}
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}
// end namespace fawkes
src
libs
geometry
gtk
hom_vector_drawer.cpp
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