164 lines
5.6 KiB
C++
164 lines
5.6 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c+mapping toolkit)
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*
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* Copyright (C) 2006 Artem Pavlenko, Jean-Francois Doyon
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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 Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser 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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*
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*****************************************************************************/
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//$Id$
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// boost
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#include <boost/python.hpp>
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// mapnik
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#include <mapnik/stroke.hpp>
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#include "mapnik_enumeration.hpp"
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using namespace mapnik;
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namespace {
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using namespace boost::python;
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list get_dashes_list(const stroke& stroke)
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{
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list l;
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if (stroke.has_dash()) {
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mapnik::dash_array const& dash = stroke.get_dash_array();
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mapnik::dash_array::const_iterator iter = dash.begin();
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mapnik::dash_array::const_iterator end = dash.end();
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for (; iter != end; ++iter) {
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l.append(make_tuple(iter->first, iter->second));
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}
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}
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return l;
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}
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}
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struct stroke_pickle_suite : boost::python::pickle_suite
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{
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static boost::python::tuple
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getinitargs(const stroke& s)
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{
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return boost::python::make_tuple(s.get_color(),s.get_width());
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}
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static boost::python::tuple
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getstate(const stroke& s)
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{
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boost::python::list dashes = get_dashes_list(s);
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return boost::python::make_tuple(s.get_opacity(),dashes,s.get_line_cap(),s.get_line_join());
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}
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static void
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setstate (stroke& s, boost::python::tuple state)
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{
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using namespace boost::python;
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if (len(state) != 4)
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{
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PyErr_SetObject(PyExc_ValueError,
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("expected 4-item tuple in call to __setstate__; got %s"
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% state).ptr()
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);
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throw_error_already_set();
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}
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s.set_opacity(extract<float>(state[0]));
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if (state[1])
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{
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list dashes = extract<list>(state[1]);
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for(boost::python::ssize_t i=0; i<len(dashes); i++) {
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double ds1 = extract<double>(dashes[i][0]);
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double ds2 = extract<double>(dashes[i][1]);
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s.add_dash(ds1,ds2);
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}
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}
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s.set_line_cap(extract<line_cap_e>(state[2]));
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s.set_line_join(extract<line_join_e>(state[3]));
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}
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};
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void export_stroke ()
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{
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using namespace boost::python;
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enumeration_<line_cap_e>("line_cap",
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"The possible values for a line cap used when drawing\n"
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"with a stroke.\n")
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.value("BUTT_CAP",BUTT_CAP)
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.value("SQUARE_CAP",SQUARE_CAP)
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.value("ROUND_CAP",ROUND_CAP)
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;
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enumeration_<line_join_e>("line_join",
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"The possible values for the line joining mode\n"
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"when drawing with a stroke.\n")
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.value("MITER_JOIN",MITER_JOIN)
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.value("MITER_REVERT_JOIN",MITER_REVERT_JOIN)
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.value("ROUND_JOIN",ROUND_JOIN)
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.value("BEVEL_JOIN",BEVEL_JOIN)
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;
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class_<stroke>("Stroke",init<>(
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"Creates a new default black stroke with the width of 1.\n"))
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.def(init<color,float>(
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(arg("color"),arg("width")),
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"Creates a new stroke object with a specified color and width.\n")
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)
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.def_pickle(stroke_pickle_suite())
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.add_property("color",make_function
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(&stroke::get_color,return_value_policy<copy_const_reference>()),
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&stroke::set_color,
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"Gets or sets the stroke color.\n"
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"Returns a new Color object on retrieval.\n")
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.add_property("width",
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&stroke::get_width,
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&stroke::set_width,
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"Gets or sets the stroke width in pixels.\n")
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.add_property("opacity",
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&stroke::get_opacity,
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&stroke::set_opacity,
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"Gets or sets the opacity of this stroke.\n"
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"The value is a float between 0 and 1.\n")
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.add_property("line_cap",
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&stroke::get_line_cap,
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&stroke::set_line_cap,
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"Gets or sets the line cap of this stroke.\n")
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.add_property("line_join",
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&stroke::get_line_join,
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&stroke::set_line_join,
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"Returns the line join mode of this stroke.\n")
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// todo consider providing a single get/set property
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.def("add_dash",&stroke::add_dash,
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(arg("length"),arg("gap")),
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"Adds a dash segment to the dash patterns of this stroke.\n")
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.def("get_dashes", get_dashes_list,
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"Returns the list of dash segments for this stroke.\n")
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.add_property("dash_offset",
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&stroke::dash_offset,
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&stroke::set_dash_offset,
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"Gets or sets dash offset of this stroke.\n")
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;
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}
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