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1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk>
5  *
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  *
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include <cassert>
21
22 #include <QDoubleSpinBox>
23
24 #include "double.hpp"
25
26 using boost::optional;
27 using std::pair;
28
29 namespace pv {
30 namespace prop {
31
32 Double::Double(QString name,
33         QString desc,
34         int decimals,
35         QString suffix,
36         optional< pair<double, double> > range,
37         optional<double> step,
38         Getter getter,
39         Setter setter) :
40         Property(name, desc, getter, setter),
41         decimals_(decimals),
42         suffix_(suffix),
43         range_(range),
44         step_(step),
45         spin_box_(nullptr)
46 {
47 }
48
49 QWidget* Double::get_widget(QWidget *parent, bool auto_commit)
50 {
51         if (spin_box_)
52                 return spin_box_;
53
54         if (!getter_)
55                 return nullptr;
56
57         Glib::VariantBase variant = getter_();
58         if (!variant.gobj())
59                 return nullptr;
60
61         double value = Glib::VariantBase::cast_dynamic<Glib::Variant<double>>(
62                 variant).get();
63
64         spin_box_ = new QDoubleSpinBox(parent);
65         spin_box_->setDecimals(decimals_);
66         spin_box_->setSuffix(suffix_);
67         if (range_)
68                 spin_box_->setRange(range_->first, range_->second);
69         if (step_)
70                 spin_box_->setSingleStep(*step_);
71
72         spin_box_->setValue(value);
73
74         if (auto_commit)
75                 connect(spin_box_, SIGNAL(valueChanged(double)),
76                         this, SLOT(on_value_changed(double)));
77
78         return spin_box_;
79 }
80
81 void Double::commit()
82 {
83         assert(setter_);
84
85         if (!spin_box_)
86                 return;
87
88         setter_(Glib::Variant<double>::create(spin_box_->value()));
89 }
90
91 void Double::on_value_changed(double)
92 {
93         commit();
94 }
95
96 }  // namespace prop
97 }  // namespace pv