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         _run_stop_button(this)
  36 {
  37         connect(&_run_stop_button, SIGNAL(clicked()), this, SIGNAL(run_stop()));
  38         connect(&_device_selector, SIGNAL(currentIndexChanged (int)),
  39                 this, SLOT(on_device_selected()));
  40
  41         _sample_rate_value.setDecimals(0);
  42         _sample_rate_value.setSuffix("Hz");
  43
  44         _run_stop_button.setText("Run");
  45
  46         addWidget(&_device_selector);
  47         _sample_rate_list_action = addWidget(&_sample_rate_list);
  48         _sample_rate_value_action = addWidget(&_sample_rate_value);
  49         addWidget(&_run_stop_button);
  50
  51         update_device_selector();
  52         update_sample_rate_selector();
  53 }
  54
  55 struct sr_dev_inst* SamplingBar::get_selected_device() const
  56 {
  57         const int index = _device_selector.currentIndex();
  58         if(index < 0)
  59                 return NULL;
  60
  61         return (sr_dev_inst*)_device_selector.itemData(
  62                 index).value<void*>();
  63 }
  64
  65 uint64_t SamplingBar::get_sample_rate() const
  66 {
  67         assert(_sample_rate_value_action);
  68         assert(_sample_rate_list_action);
  69
  70         if(_sample_rate_value_action->isVisible())
  71                 return (uint64_t)_sample_rate_value.value();
  72         else if(_sample_rate_list_action->isVisible())
  73         {
  74                 const int index = _device_selector.currentIndex();
  75                 if(index < 0)
  76                         return 0;
  77
  78                 return _device_selector.itemData(index).value<uint64_t>();
  79         }
  80
  81         return 0;
  82 }
  83
  84 void SamplingBar::update_device_selector()
  85 {
  86         GSList *devices = NULL;
  87
  88         /* Scan all drivers for all devices. */
  89         struct sr_dev_driver **const drivers = sr_driver_list();
  90         for (struct sr_dev_driver **driver = drivers; *driver; driver++) {
  91                 GSList *tmpdevs = sr_driver_scan(*driver, NULL);
  92                 for (GSList *l = tmpdevs; l; l = l->next)
  93                         devices = g_slist_append(devices, l->data);
  94                 g_slist_free(tmpdevs);
  95         }
  96
  97         for (GSList *l = devices; l; l = l->next) {
  98                 sr_dev_inst *const sdi = (sr_dev_inst*)l->data;
  99
 100                 QString title;
 101                 if (sdi->vendor && sdi->vendor[0])
 102                         title += sdi->vendor + QString(" ");
 103                 if (sdi->model && sdi->model[0])
 104                         title += sdi->model + QString(" ");
 105                 if (sdi->version && sdi->version[0])
 106                         title += sdi->version + QString(" ");
 107
 108                 _device_selector.addItem(title, qVariantFromValue(
 109                         (void*)sdi));
 110         }
 111
 112         g_slist_free(devices);
 113 }
 114
 115 void SamplingBar::update_sample_rate_selector()
 116 {
 117         const sr_dev_inst *const sdi = get_selected_device();
 118         const struct sr_samplerates *samplerates;
 119
 120         assert(_sample_rate_value_action);
 121         assert(_sample_rate_list_action);
 122
 123         if (sr_info_get(sdi->driver, SR_DI_SAMPLERATES,
 124                 (const void **)&samplerates, sdi) != SR_OK)
 125                 return;
 126
 127         _sample_rate_list_action->setVisible(false);
 128         _sample_rate_value_action->setVisible(false);
 129
 130         if (samplerates->step)
 131         {
 132                 _sample_rate_value.setRange(
 133                         samplerates->low, samplerates->high);
 134                 _sample_rate_value.setSingleStep(samplerates->step);
 135                 _sample_rate_value_action->setVisible(true);
 136         }
 137         else
 138         {
 139                 _sample_rate_list.clear();
 140                 for (const uint64_t *rate = samplerates->list;
 141                      *rate; rate++)
 142                         _sample_rate_list.addItem(
 143                                 sr_samplerate_string(*rate),
 144                                 qVariantFromValue(*rate));
 145                 _sample_rate_list.show();
 146                 _sample_rate_list_action->setVisible(true);
 147         }
 148 }
 149
 150 void SamplingBar::on_device_selected()
 151 {
 152         update_sample_rate_selector();
 153 }