1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// K-3D
// Copyright (c) 1995-2009, Timothy M. Shead
//
// Contact: tshead@k-3d.com
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// General Public License for more details.
//
// You should have received a copy of the GNU General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
/** \file
\author Anders Dahnielson (anders@dahnielson.com)
\author Timothy M. Shead (tshead@k-3d.com)
*/
#include <k3dsdk/scalar_source.h>
#include <k3d-i18n-config.h>
#include <k3dsdk/document_plugin_factory.h>
#include <k3dsdk/expression/parser.h>
#include <k3dsdk/iuser_property.h>
#include <k3dsdk/property.h>
#include <k3dsdk/type_registry.h>
#include <k3dsdk/user_property_changed_signal.h>
namespace module
{
namespace scalar
{
class expression :
public k3d::scalar_source
{
typedef k3d::scalar_source base;
public:
expression(k3d::iplugin_factory& Factory, k3d::idocument& Document) :
base(Factory, Document, _("Output value.")),
m_expression(init_owner(*this) + init_name("expression") + init_label(_("Expression")) + init_description(_("Expression to be evaluated.")) + init_value(std::string(_("cos(pi/2)")))),
m_user_property_changed_signal(*this)
{
m_expression.changed_signal().connect(k3d::hint::converter<
k3d::hint::convert<k3d::hint::any, k3d::hint::none> >(make_update_value_slot()));
m_user_property_changed_signal.connect(k3d::hint::converter<
k3d::hint::convert<k3d::hint::any, k3d::hint::none> >(make_update_value_slot()));
}
static k3d::iplugin_factory& get_factory()
{
static k3d::document_plugin_factory<expression > factory(
k3d::uuid(0x53de65d7, 0xee4a01e2, 0x259127b2, 0x676834f8),
"DoubleExpression",
_("Calculates a C-style expression, returning a double value as output"),
"Double",
k3d::iplugin_factory::STABLE);
return factory;
}
private:
k3d_data(k3d::string_t, immutable_name, change_signal, with_undo, local_storage, no_constraint, writable_property, with_serialization) m_expression;
k3d::user_property_changed_signal m_user_property_changed_signal;
void on_update_value(k3d::double_t& Output)
{
const k3d::string_t expression = m_expression.pipeline_value();
k3d::string_t variables;
std::vector<k3d::double_t> values;
const k3d::iproperty_collection::properties_t& properties = k3d::node::properties();
for(k3d::iproperty_collection::properties_t::const_iterator property = properties.begin(); property != properties.end(); ++property)
{
if(!dynamic_cast<k3d::iuser_property*>(*property))
continue;
if((**property).property_type() != typeid(k3d::double_t))
{
k3d::log() << warning << factory().name() << ": user property [" << (**property).property_name() << "] with unsupported type [" << k3d::demangle((**property).property_type()) << "] will be ignored" << std::endl;
continue;
}
if(values.size())
variables += ",";
variables += (**property).property_name();
values.push_back(k3d::property::pipeline_value<k3d::double_t>(**property));
}
k3d::expression::parser parser;
if(!parser.parse(expression, variables))
{
k3d::log() << error << factory().name() << ": expression parsing failed: " << parser.last_parse_error() << std::endl;
Output = 0.0;
return;
}
Output = parser.evaluate(&values[0]);
}
};
k3d::iplugin_factory& expression_factory()
{
return expression::get_factory();
}
} //namespace scalar
} // namespace module
|
