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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 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 | #include <cfloat> | |
22 | #include <cmath> | |
23 | ||
24 | #include <QComboBox> | |
25 | ||
26 | #include "enum.hpp" | |
27 | ||
28 | using std::abs; | |
29 | using std::pair; | |
30 | using std::vector; | |
31 | ||
32 | namespace pv { | |
33 | namespace prop { | |
34 | ||
35 | Enum::Enum(QString name, QString desc, | |
36 | vector<pair<Glib::VariantBase, QString> > values, | |
37 | Getter getter, Setter setter) : | |
38 | Property(name, desc, getter, setter), | |
39 | values_(values), | |
40 | selector_(nullptr) | |
41 | { | |
42 | } | |
43 | ||
44 | QWidget* Enum::get_widget(QWidget *parent, bool auto_commit) | |
45 | { | |
46 | if (selector_) | |
47 | return selector_; | |
48 | ||
49 | if (!getter_) | |
50 | return nullptr; | |
51 | ||
52 | Glib::VariantBase variant = getter_(); | |
53 | if (!variant.gobj()) | |
54 | return nullptr; | |
55 | ||
56 | selector_ = new QComboBox(parent); | |
57 | for (unsigned int i = 0; i < values_.size(); i++) { | |
58 | const pair<Glib::VariantBase, QString> &v = values_[i]; | |
59 | selector_->addItem(v.second, qVariantFromValue(v.first)); | |
60 | } | |
61 | ||
62 | update_widget(); | |
63 | ||
64 | if (auto_commit) | |
65 | connect(selector_, SIGNAL(currentIndexChanged(int)), | |
66 | this, SLOT(on_current_item_changed(int))); | |
67 | ||
68 | return selector_; | |
69 | } | |
70 | ||
71 | void Enum::update_widget() | |
72 | { | |
73 | if (!selector_) | |
74 | return; | |
75 | ||
76 | Glib::VariantBase variant = getter_(); | |
77 | assert(variant.gobj()); | |
78 | ||
79 | for (unsigned int i = 0; i < values_.size(); i++) { | |
80 | const pair<Glib::VariantBase, QString> &v = values_[i]; | |
81 | ||
82 | // g_variant_equal() doesn't handle floating point properly | |
83 | if (v.first.is_of_type(Glib::VariantType("d"))) { | |
84 | gdouble a, b; | |
85 | g_variant_get(variant.gobj(), "d", &a); | |
86 | g_variant_get((GVariant*)(v.first.gobj()), "d", &b); | |
87 | if (abs(a - b) <= 2 * DBL_EPSILON) | |
88 | selector_->setCurrentIndex(i); | |
89 | } else { | |
90 | // Check for "(dd)" type and handle it if it's found | |
91 | if (v.first.is_of_type(Glib::VariantType("(dd)"))) { | |
92 | gdouble a1, a2, b1, b2; | |
93 | g_variant_get(variant.gobj(), "(dd)", &a1, &a2); | |
94 | g_variant_get((GVariant*)(v.first.gobj()), "(dd)", &b1, &b2); | |
95 | if ((abs(a1 - b1) <= 2 * DBL_EPSILON) && \ | |
96 | (abs(a2 - b2) <= 2 * DBL_EPSILON)) | |
97 | selector_->setCurrentIndex(i); | |
98 | ||
99 | } else | |
100 | // Handle all other types | |
101 | if (v.first.equal(variant)) | |
102 | selector_->setCurrentIndex(i); | |
103 | } | |
104 | } | |
105 | } | |
106 | ||
107 | void Enum::commit() | |
108 | { | |
109 | assert(setter_); | |
110 | ||
111 | if (!selector_) | |
112 | return; | |
113 | ||
114 | const int index = selector_->currentIndex(); | |
115 | if (index < 0) | |
116 | return; | |
117 | ||
118 | setter_(selector_->itemData(index).value<Glib::VariantBase>()); | |
119 | } | |
120 | ||
121 | void Enum::on_current_item_changed(int) | |
122 | { | |
123 | commit(); | |
124 | } | |
125 | ||
126 | } // namespace prop | |
127 | } // namespace pv |