Thomas Geymayer
00a20409f7
Using a weak pointer is the best way to ensure no invalid pointer is used. This also fixes a possible crash in simgear::canvas::Element::getParentStyle on destructing canvas elements.
90 lines
2.5 KiB
C++
90 lines
2.5 KiB
C++
// An OpenVG path on the Canvas
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//
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// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library 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 GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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#ifndef CANVAS_PATH_HXX_
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#define CANVAS_PATH_HXX_
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#include "CanvasElement.hxx"
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#include <boost/preprocessor/iteration/iterate.hpp>
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namespace simgear
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{
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namespace canvas
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{
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class Path:
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public Element
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{
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public:
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static const std::string TYPE_NAME;
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static void staticInit();
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Path( const CanvasWeakPtr& canvas,
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const SGPropertyNode_ptr& node,
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const Style& parent_style,
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ElementWeakPtr parent = 0 );
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virtual ~Path();
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virtual void update(double dt);
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virtual osg::BoundingBox getTransformedBounds(const osg::Matrix& m) const;
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#define BOOST_PP_ITERATION_LIMITS (0, 6)
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#define BOOST_PP_FILENAME_1 \
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<simgear/canvas/elements/detail/add_segment_variadic.hxx>
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#include BOOST_PP_ITERATE()
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/** Move path cursor */
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Path& moveTo(float x_abs, float y_abs);
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Path& move(float x_rel, float y_rel);
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/** Add a line */
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Path& lineTo(float x_abs, float y_abs);
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Path& line(float x_rel, float y_rel);
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/** Add a horizontal line */
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Path& horizTo(float x_abs);
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Path& horiz(float x_rel);
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/** Add a vertical line */
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Path& vertTo(float y_abs);
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Path& vert(float y_rel);
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/** Close the path (implicit lineTo to first point of path) */
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Path& close();
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protected:
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enum PathAttributes
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{
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CMDS = LAST_ATTRIBUTE << 1,
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COORDS = CMDS << 1
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};
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class PathDrawable;
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typedef osg::ref_ptr<PathDrawable> PathDrawableRef;
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PathDrawableRef _path;
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virtual void childRemoved(SGPropertyNode * child);
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virtual void childChanged(SGPropertyNode * child);
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};
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} // namespace canvas
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} // namespace simgear
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#endif /* CANVAS_PATH_HXX_ */
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