Accept new position on enter press in cursor popups
[pulseview.git] / pv / widgets / timestampspinbox.cpp
1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2015 Jens Steinhauser <jens.steinhauser@gmail.com>
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 "timestampspinbox.hpp"
21
22 #include <QLineEdit>
23 #include <QRegExp>
24
25 namespace pv {
26 namespace widgets {
27
28 TimestampSpinBox::TimestampSpinBox(QWidget* parent)
29         : QAbstractSpinBox(parent)
30         , precision_(9)
31         , stepsize_("1e-6")
32 {
33         connect(this, SIGNAL(editingFinished()), this, SLOT(on_editingFinished()));
34         connect(lineEdit(), SIGNAL(editingFinished()), this, SLOT(on_editingFinished()));
35
36         updateEdit();
37 }
38
39 void TimestampSpinBox::stepBy(int steps)
40 {
41         setValue(value_ + steps * stepsize_);
42 }
43
44 QAbstractSpinBox::StepEnabled TimestampSpinBox::stepEnabled() const
45 {
46         return QAbstractSpinBox::StepUpEnabled | QAbstractSpinBox::StepDownEnabled;
47 }
48
49 unsigned TimestampSpinBox::precision() const
50 {
51         return precision_;
52 }
53
54 void TimestampSpinBox::setPrecision(unsigned precision)
55 {
56         precision_ = precision;
57         updateEdit();
58 }
59
60 const pv::util::Timestamp& TimestampSpinBox::singleStep() const
61 {
62         return stepsize_;
63 }
64
65 void TimestampSpinBox::setSingleStep(const pv::util::Timestamp& step)
66 {
67         stepsize_ = step;
68 }
69
70 const pv::util::Timestamp& TimestampSpinBox::value() const
71 {
72         return value_;
73 }
74
75 QSize TimestampSpinBox::minimumSizeHint() const
76 {
77         const QFontMetrics fm(fontMetrics());
78         const int l = round(value_).str().size() + precision_ + 10;
79         const int w = fm.width(QString(l, '0'));
80         const int h = lineEdit()->minimumSizeHint().height();
81         return QSize(w, h);
82 }
83
84 void TimestampSpinBox::setValue(const pv::util::Timestamp& val)
85 {
86         if (val == value_)
87                 return;
88
89         value_ = val;
90         updateEdit();
91         valueChanged(value_);
92 }
93
94 void TimestampSpinBox::on_editingFinished()
95 {
96         QRegExp re(R"(\s*([-+]?)\s*([0-9]+\.?[0-9]*).*)");
97
98         if (re.exactMatch(text())) {
99                 QStringList captures = re.capturedTexts();
100                 captures.removeFirst(); // remove entire match
101                 QString str = captures.join("");
102                 setValue(pv::util::Timestamp(str.toStdString()));
103
104         } else {
105                 // replace the malformed entered string with the old value
106                 updateEdit();
107         }
108 }
109
110 void TimestampSpinBox::updateEdit()
111 {
112         QString newtext = pv::util::format_time_si(
113                 value_, pv::util::SIPrefix::none, precision_);
114         const QSignalBlocker blocker(lineEdit());
115         // Keep cursor position
116         int cursor = lineEdit()->cursorPosition();
117         lineEdit()->setText(newtext);
118         lineEdit()->setCursorPosition(cursor);
119 }
120
121 }  // namespace widgets
122 }  // namespace pv