pv/prop/int.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 #include <cstdint>
  22
  23 #include <QDebug>
  24 #include <QSpinBox>
  25
  26 #include <libsigrokcxx/libsigrokcxx.hpp>
  27
  28 #include "int.hpp"
  29
  30 using boost::optional;
  31 using std::max;
  32 using std::min;
  33 using std::pair;
  34
  35 namespace pv {
  36 namespace prop {
  37
  38 Int::Int(QString name, QString desc, QString suffix,
  39         optional< pair<int64_t, int64_t> > range, Getter getter, Setter setter,
  40         QString special_value_text) :
  41         Property(name, desc, getter, setter),
  42         suffix_(suffix),
  43         special_value_text_(special_value_text),
  44         range_(range),
  45         spin_box_(nullptr)
  46 {
  47 }
  48
  49 QWidget* Int::get_widget(QWidget *parent, bool auto_commit)
  50 {
  51         int64_t range_min = 0;
  52         uint64_t range_max = 0;
  53
  54         if (spin_box_)
  55                 return spin_box_;
  56
  57         if (!getter_)
  58                 return nullptr;
  59
  60         try {
  61                 value_ = getter_();
  62         } catch (const sigrok::Error &e) {
  63                 qWarning() << tr("Querying config key %1 resulted in %2").arg(name_, e.what());
  64                 return nullptr;
  65         }
  66
  67         GVariant *value = value_.gobj();
  68         if (!value)
  69                 return nullptr;
  70
  71         spin_box_ = new QSpinBox(parent);
  72         spin_box_->setSuffix(suffix_);
  73         spin_box_->setSpecialValueText(special_value_text_);
  74
  75         const GVariantType *const type = g_variant_get_type(value);
  76         assert(type);
  77
  78         if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE)) {
  79                 range_min = 0, range_max = UINT8_MAX;
  80         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16)) {
  81                 range_min = INT16_MIN, range_max = INT16_MAX;
  82         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16)) {
  83                 range_min = 0, range_max = UINT16_MAX;
  84         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32)) {
  85                 range_min = INT32_MIN, range_max = INT32_MAX;
  86         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32)) {
  87                 range_min = 0, range_max = UINT32_MAX;
  88         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64)) {
  89                 range_min = INT64_MIN, range_max = INT64_MAX;
  90         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64)) {
  91                 range_min = 0, range_max = UINT64_MAX;
  92         } else {
  93                 // Unexpected value type.
  94                 assert(false);
  95         }
  96
  97         // @todo sigrok supports 64-bit quantities, but Qt does not have a
  98         // standard widget to allow the values to be modified over the full
  99         // 64-bit range on 32-bit machines. To solve the issue we need a
 100         // custom widget.
 101
 102         range_min = max(range_min, (int64_t)INT_MIN);
 103         range_max = min(range_max, (uint64_t)INT_MAX);
 104
 105         if (range_)
 106                 spin_box_->setRange((int)range_->first, (int)range_->second);
 107         else
 108                 spin_box_->setRange((int)range_min, (int)range_max);
 109
 110         update_widget();
 111
 112         if (auto_commit)
 113                 connect(spin_box_, SIGNAL(valueChanged(int)),
 114                         this, SLOT(on_value_changed(int)));
 115
 116         return spin_box_;
 117 }
 118
 119 void Int::update_widget()
 120 {
 121         if (!spin_box_)
 122                 return;
 123
 124         try {
 125                 value_ = getter_();
 126         } catch (const sigrok::Error &e) {
 127                 qWarning() << tr("Querying config key %1 resulted in %2").arg(name_, e.what());
 128                 return;
 129         }
 130
 131         GVariant *value = value_.gobj();
 132         assert(value);
 133
 134         const GVariantType *const type = g_variant_get_type(value);
 135         assert(type);
 136
 137         int64_t int_val = 0;
 138
 139         if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE)) {
 140                 int_val = g_variant_get_byte(value);
 141         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16)) {
 142                 int_val = g_variant_get_int16(value);
 143         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16)) {
 144                 int_val = g_variant_get_uint16(value);
 145         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32)) {
 146                 int_val = g_variant_get_int32(value);
 147         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32)) {
 148                 int_val = g_variant_get_uint32(value);
 149         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64)) {
 150                 int_val = g_variant_get_int64(value);
 151         } else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64)) {
 152                 int_val = g_variant_get_uint64(value);
 153         } else {
 154                 // Unexpected value type.
 155                 assert(false);
 156         }
 157
 158         spin_box_->setValue((int)int_val);
 159 }
 160
 161 void Int::commit()
 162 {
 163         assert(setter_);
 164
 165         if (!spin_box_)
 166                 return;
 167
 168         GVariant *new_value = nullptr;
 169         const GVariantType *const type = g_variant_get_type(value_.gobj());
 170         assert(type);
 171
 172         if (g_variant_type_equal(type, G_VARIANT_TYPE_BYTE))
 173                 new_value = g_variant_new_byte(spin_box_->value());
 174         else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT16))
 175                 new_value = g_variant_new_int16(spin_box_->value());
 176         else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT16))
 177                 new_value = g_variant_new_uint16(spin_box_->value());
 178         else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT32))
 179                 new_value = g_variant_new_int32(spin_box_->value());
 180         else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT32))
 181                 new_value = g_variant_new_uint32(spin_box_->value());
 182         else if (g_variant_type_equal(type, G_VARIANT_TYPE_INT64))
 183                 new_value = g_variant_new_int64(spin_box_->value());
 184         else if (g_variant_type_equal(type, G_VARIANT_TYPE_UINT64))
 185                 new_value = g_variant_new_uint64(spin_box_->value());
 186         else {
 187                 // Unexpected value type.
 188                 assert(false);
 189         }
 190
 191         assert(new_value);
 192
 193         value_ = Glib::VariantBase(new_value);
 194
 195         setter_(value_);
 196 }
 197
 198 void Int::on_value_changed(int)
 199 {
 200         commit();
 201 }
 202
 203 }  // namespace prop
 204 }  // namespace pv