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 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
  24 #include <QRegularExpression>
  25 #else
  26 #include <QRegExp>
  27 #endif
  28
  29 namespace pv {
  30 namespace widgets {
  31
  32 TimestampSpinBox::TimestampSpinBox(QWidget* parent)
  33         : QAbstractSpinBox(parent)
  34         , precision_(9)
  35         , stepsize_("1e-6")
  36 {
  37         connect(this, SIGNAL(editingFinished()), this, SLOT(on_editingFinished()));
  38         connect(lineEdit(), SIGNAL(editingFinished()), this, SLOT(on_editingFinished()));
  39
  40         updateEdit();
  41 }
  42
  43 void TimestampSpinBox::stepBy(int steps)
  44 {
  45         setValue(value_ + steps * stepsize_);
  46 }
  47
  48 QAbstractSpinBox::StepEnabled TimestampSpinBox::stepEnabled() const
  49 {
  50         return QAbstractSpinBox::StepUpEnabled | QAbstractSpinBox::StepDownEnabled;
  51 }
  52
  53 unsigned TimestampSpinBox::precision() const
  54 {
  55         return precision_;
  56 }
  57
  58 void TimestampSpinBox::setPrecision(unsigned precision)
  59 {
  60         precision_ = precision;
  61         updateEdit();
  62 }
  63
  64 const pv::util::Timestamp& TimestampSpinBox::singleStep() const
  65 {
  66         return stepsize_;
  67 }
  68
  69 void TimestampSpinBox::setSingleStep(const pv::util::Timestamp& step)
  70 {
  71         stepsize_ = step;
  72 }
  73
  74 const pv::util::Timestamp& TimestampSpinBox::value() const
  75 {
  76         return value_;
  77 }
  78
  79 QSize TimestampSpinBox::minimumSizeHint() const
  80 {
  81         const QFontMetrics fm(fontMetrics());
  82         const int l = round(value_).str().size() + precision_ + 10;
  83         const int w = util::text_width(fm, QString(l, '0'));
  84         const int h = lineEdit()->minimumSizeHint().height();
  85         return QSize(w, h);
  86 }
  87
  88 void TimestampSpinBox::setValue(const pv::util::Timestamp& val)
  89 {
  90         if (val == value_)
  91                 return;
  92
  93         value_ = val;
  94         updateEdit();
  95         valueChanged(value_);
  96 }
  97
  98 void TimestampSpinBox::on_editingFinished()
  99 {
 100         static const auto re_pattern = R"(\s*([-+]?)\s*([0-9]+\.?[0-9]*).*)";
 101
 102         bool has_match;
 103         QStringList captures;
 104 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
 105         QRegularExpression re(re_pattern);
 106         has_match = re.match(text()).hasMatch();
 107         if (has_match) {
 108                 captures = re.match(text()).capturedTexts();
 109         }
 110 #else
 111         QRegExp re(re_pattern);
 112         has_match = re.exactMatch(text());
 113         if (has_match) {
 114                 captures = re.capturedTexts();
 115         }
 116 #endif
 117
 118         if (has_match) {
 119                 captures.removeFirst(); // remove entire match
 120                 QString str = captures.join("");
 121                 setValue(pv::util::Timestamp(str.toStdString()));
 122
 123         } else {
 124                 // replace the malformed entered string with the old value
 125                 updateEdit();
 126         }
 127 }
 128
 129 void TimestampSpinBox::updateEdit()
 130 {
 131         QString newtext = pv::util::format_time_si(
 132                 value_, pv::util::SIPrefix::none, precision_);
 133         const QSignalBlocker blocker(lineEdit());
 134         // Keep cursor position
 135         int cursor = lineEdit()->cursorPosition();
 136         lineEdit()->setText(newtext);
 137         lineEdit()->setCursorPosition(cursor);
 138 }
 139
 140 }  // namespace widgets
 141 }  // namespace pv