pv/prop/double.cpp

   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