pv/widgets/devicetoolbutton.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2015 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 <cassert>
  22
  23 #include <QTimer>
  24 #include <QToolTip>
  25
  26 #include <libsigrokcxx/libsigrokcxx.hpp>
  27
  28 #include <pv/devicemanager.hpp>
  29 #include <pv/devices/device.hpp>
  30
  31 #include "devicetoolbutton.hpp"
  32
  33 using std::list;
  34 using std::shared_ptr;
  35 using std::string;
  36 using std::weak_ptr;
  37 using std::vector;
  38
  39 using pv::devices::Device;
  40
  41 namespace pv {
  42 namespace widgets {
  43
  44 DeviceToolButton::DeviceToolButton(QWidget *parent,
  45         DeviceManager &device_manager,
  46         QAction *connect_action) :
  47         QToolButton(parent),
  48         device_manager_(device_manager),
  49         connect_action_(connect_action),
  50         menu_(this),
  51         mapper_(this),
  52         devices_()
  53 {
  54         setPopupMode(QToolButton::MenuButtonPopup);
  55         setMenu(&menu_);
  56         setDefaultAction(connect_action_);
  57         setMinimumWidth(QFontMetrics(font()).averageCharWidth() * 24);
  58
  59         connect(&mapper_, SIGNAL(mapped(QObject*)),
  60                 this, SLOT(on_action(QObject*)));
  61
  62         connect(&menu_, SIGNAL(hovered(QAction*)),
  63                 this, SLOT(on_menu_hovered(QAction*)));
  64 }
  65
  66 shared_ptr<Device> DeviceToolButton::selected_device()
  67 {
  68         return selected_device_;
  69 }
  70
  71 void DeviceToolButton::set_device_list(
  72         const list< shared_ptr<Device> > &devices, shared_ptr<Device> selected)
  73 {
  74         selected_device_ = selected;
  75         setText(selected ? QString::fromStdString(
  76                 selected->display_name(device_manager_)) : tr("<No Device>"));
  77         devices_ = vector< weak_ptr<Device> >(devices.begin(), devices.end());
  78         update_device_list();
  79 }
  80
  81 void DeviceToolButton::reset()
  82 {
  83         setText(tr("<No Device>"));
  84         selected_device_.reset();
  85         update_device_list();
  86 }
  87
  88 void DeviceToolButton::update_device_list()
  89 {
  90         menu_.clear();
  91         menu_.addAction(connect_action_);
  92         menu_.setDefaultAction(connect_action_);
  93         menu_.addSeparator();
  94
  95         for (weak_ptr<Device> dev_weak_ptr : devices_) {
  96                 shared_ptr<Device> dev(dev_weak_ptr.lock());
  97                 if (!dev)
  98                         continue;
  99
 100                 QAction *const a = new QAction(QString::fromStdString(
 101                         dev->display_name(device_manager_)), this);
 102                 a->setCheckable(true);
 103                 a->setChecked(selected_device_ == dev);
 104                 a->setData(qVariantFromValue((void*)dev.get()));
 105                 a->setToolTip(QString::fromStdString(dev->full_name()));
 106                 mapper_.setMapping(a, a);
 107
 108                 connect(a, SIGNAL(triggered()), &mapper_, SLOT(map()));
 109
 110                 menu_.addAction(a);
 111         }
 112 }
 113
 114 void DeviceToolButton::on_action(QObject *action)
 115 {
 116         assert(action);
 117
 118         selected_device_.reset();
 119
 120         Device *const dev = (Device*)((QAction*)action)->data().value<void*>();
 121         for (weak_ptr<Device> dev_weak_ptr : devices_) {
 122                 shared_ptr<Device> dev_ptr(dev_weak_ptr);
 123                 if (dev_ptr.get() == dev) {
 124                         selected_device_ = shared_ptr<Device>(dev_ptr);
 125                         break;
 126                 }
 127         }
 128
 129         update_device_list();
 130         setText(QString::fromStdString(
 131                 selected_device_->display_name(device_manager_)));
 132
 133         device_selected();
 134 }
 135
 136 void DeviceToolButton::on_menu_hovered(QAction *action)
 137 {
 138         assert(action);
 139
 140         // Only show the tooltip for device entries (they hold
 141         // device pointers in their data field)
 142         if (!action->data().isValid())
 143                 return;
 144
 145         device_tooltip_ = action->toolTip();
 146
 147         if (QToolTip::isVisible())
 148                 on_menu_hover_timeout();
 149         else
 150                 QTimer::singleShot(1000, this, SLOT(on_menu_hover_timeout()));
 151 }
 152
 153 void DeviceToolButton::on_menu_hover_timeout()
 154 {
 155         if (device_tooltip_.isEmpty())
 156                 return;
 157
 158         QToolTip::showText(QCursor::pos(), device_tooltip_);
 159 }
 160
 161 } // widgets
 162 } // pv