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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <cassert>
  21
  22 #include <QTimer>
  23 #include <QToolTip>
  24
  25 #include <libsigrokcxx/libsigrokcxx.hpp>
  26
  27 #include <pv/devicemanager.hpp>
  28 #include <pv/devices/device.hpp>
  29
  30 #include "devicetoolbutton.hpp"
  31
  32 using std::list;
  33 using std::shared_ptr;
  34 using std::string;
  35 using std::weak_ptr;
  36 using std::vector;
  37
  38 using pv::devices::Device;
  39
  40 namespace pv {
  41 namespace widgets {
  42
  43 DeviceToolButton::DeviceToolButton(QWidget *parent,
  44         DeviceManager &device_manager,
  45         QAction *connect_action) :
  46         QToolButton(parent),
  47         device_manager_(device_manager),
  48         connect_action_(connect_action),
  49         menu_(this),
  50         mapper_(this),
  51         devices_()
  52 {
  53         setPopupMode(QToolButton::MenuButtonPopup);
  54         setMenu(&menu_);
  55         setDefaultAction(connect_action_);
  56         setMinimumWidth(QFontMetrics(font()).averageCharWidth() * 24);
  57
  58         connect(&mapper_, SIGNAL(mapped(QObject*)),
  59                 this, SLOT(on_action(QObject*)));
  60
  61         connect(&menu_, SIGNAL(hovered(QAction*)),
  62                 this, SLOT(on_menu_hovered(QAction*)));
  63 }
  64
  65 shared_ptr<Device> DeviceToolButton::selected_device()
  66 {
  67         return selected_device_;
  68 }
  69
  70 void DeviceToolButton::set_device_list(
  71         const list< shared_ptr<Device> > &devices, shared_ptr<Device> selected)
  72 {
  73         selected_device_ = selected;
  74         setText(selected ? QString::fromStdString(
  75                 selected->display_name(device_manager_)) : tr("<No Device>"));
  76         devices_ = vector< weak_ptr<Device> >(devices.begin(), devices.end());
  77         update_device_list();
  78 }
  79
  80 void DeviceToolButton::reset()
  81 {
  82         setText(tr("<No Device>"));
  83         selected_device_.reset();
  84         update_device_list();
  85 }
  86
  87 void DeviceToolButton::update_device_list()
  88 {
  89         menu_.clear();
  90         menu_.addAction(connect_action_);
  91         menu_.setDefaultAction(connect_action_);
  92         menu_.addSeparator();
  93
  94         for (weak_ptr<Device> dev_weak_ptr : devices_) {
  95                 shared_ptr<Device> dev(dev_weak_ptr.lock());
  96                 if (!dev)
  97                         continue;
  98
  99                 QAction *const a = new QAction(QString::fromStdString(
 100                         dev->display_name(device_manager_)), this);
 101                 a->setCheckable(true);
 102                 a->setChecked(selected_device_ == dev);
 103                 a->setData(qVariantFromValue((void*)dev.get()));
 104                 a->setToolTip(QString::fromStdString(dev->full_name()));
 105                 mapper_.setMapping(a, a);
 106
 107                 connect(a, SIGNAL(triggered()), &mapper_, SLOT(map()));
 108
 109                 menu_.addAction(a);
 110         }
 111 }
 112
 113 void DeviceToolButton::on_action(QObject *action)
 114 {
 115         assert(action);
 116
 117         selected_device_.reset();
 118
 119         Device *const dev = (Device*)((QAction*)action)->data().value<void*>();
 120         for (weak_ptr<Device> dev_weak_ptr : devices_) {
 121                 shared_ptr<Device> dev_ptr(dev_weak_ptr);
 122                 if (dev_ptr.get() == dev) {
 123                         selected_device_ = shared_ptr<Device>(dev_ptr);
 124                         break;
 125                 }
 126         }
 127
 128         update_device_list();
 129         setText(QString::fromStdString(
 130                 selected_device_->display_name(device_manager_)));
 131
 132         device_selected();
 133 }
 134
 135 void DeviceToolButton::on_menu_hovered(QAction *action)
 136 {
 137         assert(action);
 138
 139         // Only show the tooltip for device entries (they hold
 140         // device pointers in their data field)
 141         if (!action->data().isValid())
 142                 return;
 143
 144         device_tooltip_ = action->toolTip();
 145
 146         if (QToolTip::isVisible())
 147                 on_menu_hover_timeout();
 148         else
 149                 QTimer::singleShot(1000, this, SLOT(on_menu_hover_timeout()));
 150 }
 151
 152 void DeviceToolButton::on_menu_hover_timeout()
 153 {
 154         if (device_tooltip_.isEmpty())
 155                 return;
 156
 157         QToolTip::showText(QCursor::pos(), device_tooltip_);
 158 }
 159
 160 }  // namespace widgets
 161 }  // namespace pv