samplingbar.cpp

   1 /*
   2  * This file is part of the sigrok 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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <assert.h>
  22
  23 extern "C" {
  24 #include <libsigrok/libsigrok.h>
  25 }
  26
  27 #include <QAction>
  28
  29 #include "samplingbar.h"
  30
  31 SamplingBar::SamplingBar(QWidget *parent) :
  32         QToolBar("Sampling Bar", parent),
  33         _device_selector(this),
  34         _sample_rate_list(this)
  35 {
  36         connect(&_device_selector, SIGNAL(currentIndexChanged (int)),
  37                 this, SLOT(on_device_selected()));
  38
  39         _sample_rate_value.setDecimals(0);
  40         _sample_rate_value.setSuffix("Hz");
  41
  42         addWidget(&_device_selector);
  43         _sample_rate_list_action = addWidget(&_sample_rate_list);
  44         _sample_rate_value_action = addWidget(&_sample_rate_value);
  45
  46         update_device_selector();
  47         update_sample_rate_selector();
  48 }
  49
  50 struct sr_dev_inst* SamplingBar::get_selected_device() const
  51 {
  52         const int index = _device_selector.currentIndex();
  53         if(index < 0)
  54                 return NULL;
  55
  56         return (sr_dev_inst*)_device_selector.itemData(
  57                 index).value<void*>();
  58 }
  59
  60 uint64_t SamplingBar::get_sample_rate() const
  61 {
  62         assert(_sample_rate_value_action);
  63         assert(_sample_rate_list_action);
  64
  65         if(_sample_rate_value_action->isVisible())
  66                 return (uint64_t)_sample_rate_value.value();
  67         else if(_sample_rate_list_action->isVisible())
  68         {
  69                 const int index = _device_selector.currentIndex();
  70                 if(index < 0)
  71                         return 0;
  72
  73                 return _device_selector.itemData(index).value<uint64_t>();
  74         }
  75
  76         return 0;
  77 }
  78
  79 void SamplingBar::update_device_selector()
  80 {
  81         GSList *devices = NULL;
  82
  83         /* Scan all drivers for all devices. */
  84         struct sr_dev_driver **const drivers = sr_driver_list();
  85         for (struct sr_dev_driver **driver = drivers; *driver; driver++) {
  86                 GSList *tmpdevs = sr_driver_scan(*driver, NULL);
  87                 for (GSList *l = tmpdevs; l; l = l->next)
  88                         devices = g_slist_append(devices, l->data);
  89                 g_slist_free(tmpdevs);
  90         }
  91
  92         for (GSList *l = devices; l; l = l->next) {
  93                 sr_dev_inst *const sdi = (sr_dev_inst*)l->data;
  94
  95                 QString title;
  96                 if (sdi->vendor && sdi->vendor[0])
  97                         title += sdi->vendor + QString(" ");
  98                 if (sdi->model && sdi->model[0])
  99                         title += sdi->model + QString(" ");
 100                 if (sdi->version && sdi->version[0])
 101                         title += sdi->version + QString(" ");
 102
 103                 _device_selector.addItem(title, qVariantFromValue(
 104                         (void*)sdi));
 105         }
 106
 107         g_slist_free(devices);
 108 }
 109
 110 void SamplingBar::update_sample_rate_selector()
 111 {
 112         const sr_dev_inst *const sdi = get_selected_device();
 113         const struct sr_samplerates *samplerates;
 114
 115         assert(_sample_rate_value_action);
 116         assert(_sample_rate_list_action);
 117
 118         if (sr_info_get(sdi->driver, SR_DI_SAMPLERATES,
 119                 (const void **)&samplerates, sdi) != SR_OK)
 120                 return;
 121
 122         _sample_rate_list_action->setVisible(false);
 123         _sample_rate_value_action->setVisible(false);
 124
 125         if (samplerates->step)
 126         {
 127                 _sample_rate_value.setRange(
 128                         samplerates->low, samplerates->high);
 129                 _sample_rate_value.setSingleStep(samplerates->step);
 130                 _sample_rate_value_action->setVisible(true);
 131         }
 132         else
 133         {
 134                 _sample_rate_list.clear();
 135                 for (const uint64_t *rate = samplerates->list;
 136                      *rate; rate++)
 137                         _sample_rate_list.addItem(
 138                                 sr_samplerate_string(*rate),
 139                                 qVariantFromValue(*rate));
 140                 _sample_rate_list.show();
 141                 _sample_rate_list_action->setVisible(true);
 142         }
 143 }
 144
 145 void SamplingBar::on_device_selected()
 146 {
 147         update_sample_rate_selector();
 148 }