pv/view/header.cpp

   1 /*
   2  * This file is part of the PulseView 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 "header.h"
  22 #include "view.h"
  23
  24 #include "signal.h"
  25 #include "../sigsession.h"
  26
  27 #include <assert.h>
  28
  29 #include <boost/foreach.hpp>
  30
  31 #include <QApplication>
  32 #include <QColorDialog>
  33 #include <QInputDialog>
  34 #include <QMenu>
  35 #include <QMouseEvent>
  36 #include <QPainter>
  37 #include <QRect>
  38
  39 using namespace boost;
  40 using namespace std;
  41
  42 namespace pv {
  43 namespace view {
  44
  45 Header::Header(View &parent) :
  46         MarginWidget(parent),
  47         _action_set_name(new QAction(tr("Set &Name..."), this)),
  48         _action_set_colour(new QAction(tr("Set &Colour..."), this))
  49 {
  50         setMouseTracking(true);
  51
  52         connect(_action_set_name, SIGNAL(triggered()),
  53                 this, SLOT(on_action_set_name_triggered()));
  54         connect(_action_set_colour, SIGNAL(triggered()),
  55                 this, SLOT(on_action_set_colour_triggered()));
  56
  57         connect(&_view, SIGNAL(signals_moved()),
  58                 this, SLOT(on_signals_moved()));
  59 }
  60
  61 boost::shared_ptr<pv::view::Signal> Header::get_mouse_over_signal(
  62         const QPoint &pt)
  63 {
  64         const int w = width();
  65         const vector< shared_ptr<Signal> > sigs(
  66                 _view.session().get_signals());
  67
  68         const int v_offset = _view.v_offset();
  69         BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
  70         {
  71                 assert(s);
  72
  73                 if (s->pt_in_label_rect(s->get_v_offset() - v_offset,
  74                         0, w, pt))
  75                         return s;
  76         }
  77
  78         return shared_ptr<Signal>();
  79 }
  80
  81 void Header::clear_selection()
  82 {
  83         const vector< shared_ptr<Signal> > sigs(
  84                 _view.session().get_signals());
  85         BOOST_FOREACH(const shared_ptr<Signal> s, sigs) {
  86                 assert(s);
  87                 s->select(false);
  88         }
  89
  90         update();
  91 }
  92
  93 void Header::paintEvent(QPaintEvent*)
  94 {
  95         const int w = width();
  96         const vector< shared_ptr<Signal> > sigs(
  97                 _view.session().get_signals());
  98
  99         QPainter painter(this);
 100         painter.setRenderHint(QPainter::Antialiasing);
 101
 102         const int v_offset = _view.v_offset();
 103         const bool dragging = !_drag_sigs.empty();
 104         BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 105         {
 106                 assert(s);
 107
 108                 const int y = s->get_v_offset() - v_offset;
 109                 const bool highlight = !dragging && s->pt_in_label_rect(
 110                         y, 0, w, _mouse_point);
 111                 s->paint_label(painter, y, w, highlight);
 112         }
 113
 114         painter.end();
 115 }
 116
 117 void Header::mousePressEvent(QMouseEvent *event)
 118 {
 119         assert(event);
 120
 121         const vector< shared_ptr<Signal> > sigs(
 122                 _view.session().get_signals());
 123
 124         if (event->button() & Qt::LeftButton) {
 125                 _mouse_down_point = event->pos();
 126
 127                 // Save the offsets of any signals which will be dragged
 128                 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 129                         if (s->selected())
 130                                 _drag_sigs.push_back(
 131                                         make_pair(s, s->get_v_offset()));
 132         }
 133
 134         // Select the signal if it has been clicked
 135         const shared_ptr<Signal> mouse_over_signal =
 136                 get_mouse_over_signal(event->pos());
 137         if (mouse_over_signal) {
 138                 if (mouse_over_signal->selected())
 139                         mouse_over_signal->select(false);
 140                 else {
 141                         mouse_over_signal->select(true);
 142
 143                         if (~QApplication::keyboardModifiers() &
 144                                 Qt::ControlModifier)
 145                                 _drag_sigs.clear();
 146
 147                         // Add the signal to the drag list
 148                         if (event->button() & Qt::LeftButton)
 149                                 _drag_sigs.push_back(
 150                                         make_pair(mouse_over_signal,
 151                                         mouse_over_signal->get_v_offset()));
 152                 }
 153         }
 154
 155         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 156                 // Unselect all other signals because the Ctrl is not
 157                 // pressed
 158                 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 159                         if (s != mouse_over_signal)
 160                                 s->select(false);
 161         }
 162
 163         update();
 164 }
 165
 166 void Header::mouseReleaseEvent(QMouseEvent *event)
 167 {
 168         assert(event);
 169         if (event->button() == Qt::LeftButton) {
 170                 _drag_sigs.clear();
 171                 _view.normalize_layout();
 172         }
 173 }
 174
 175 void Header::mouseMoveEvent(QMouseEvent *event)
 176 {
 177         assert(event);
 178         _mouse_point = event->pos();
 179
 180         // Move the signals if we are dragging
 181         if (!_drag_sigs.empty()) {
 182                 const int delta = event->pos().y() - _mouse_down_point.y();
 183
 184                 for (std::list<std::pair<boost::weak_ptr<Signal>,
 185                         int> >::iterator i = _drag_sigs.begin();
 186                         i != _drag_sigs.end(); i++) {
 187                         const boost::shared_ptr<Signal> sig((*i).first);
 188                         if (sig) {
 189                                 const int y = (*i).second + delta;
 190                                 const int y_snap =
 191                                         ((y + View::SignalSnapGridSize / 2) /
 192                                                 View::SignalSnapGridSize) *
 193                                                 View::SignalSnapGridSize;
 194                                 sig->set_v_offset(y_snap);
 195
 196                                 // Ensure the signal is selected
 197                                 sig->select();
 198                         }
 199
 200                 }
 201
 202                 signals_moved();
 203         }
 204
 205         update();
 206 }
 207
 208 void Header::leaveEvent(QEvent*)
 209 {
 210         _mouse_point = QPoint(-1, -1);
 211         update();
 212 }
 213
 214 void Header::contextMenuEvent(QContextMenuEvent *event)
 215 {
 216         const shared_ptr<Signal> s = get_mouse_over_signal(_mouse_point);
 217
 218         if (!s)
 219                 return;
 220
 221         QMenu menu(this);
 222         menu.addAction(_action_set_name);
 223         menu.addAction(_action_set_colour);
 224
 225         _context_signal = s;
 226         menu.exec(event->globalPos());
 227         _context_signal.reset();
 228 }
 229
 230 void Header::on_action_set_name_triggered()
 231 {
 232         bool ok = false;
 233
 234         shared_ptr<view::Signal> context_signal = _context_signal;
 235         if (!context_signal)
 236                 return;
 237
 238         const QString new_label = QInputDialog::getText(this, tr("Set Name"),
 239                 tr("Name"), QLineEdit::Normal, context_signal->get_name(), &ok);
 240
 241         if (ok)
 242                 context_signal->set_name(new_label);
 243 }
 244
 245 void Header::on_action_set_colour_triggered()
 246 {
 247         shared_ptr<view::Signal> context_signal = _context_signal;
 248         if (!context_signal)
 249                 return;
 250
 251         const QColor new_colour = QColorDialog::getColor(
 252                 context_signal->get_colour(), this, tr("Set Colour"));
 253
 254         if (new_colour.isValid())
 255                 context_signal->set_colour(new_colour);
 256 }
 257
 258 void Header::on_signals_moved()
 259 {
 260         update();
 261 }
 262
 263
 264 } // namespace view
 265 } // namespace pv