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.session(), SIGNAL(signals_changed()),
  58                 this, SLOT(on_signals_changed()));
  59
  60         connect(&_view, SIGNAL(signals_moved()),
  61                 this, SLOT(on_signals_moved()));
  62 }
  63
  64 boost::shared_ptr<pv::view::Signal> Header::get_mouse_over_signal(
  65         const QPoint &pt)
  66 {
  67         const int w = width();
  68         const vector< shared_ptr<Signal> > sigs(
  69                 _view.session().get_signals());
  70
  71         const int v_offset = _view.v_offset();
  72         BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
  73         {
  74                 assert(s);
  75
  76                 if (s->pt_in_label_rect(s->get_v_offset() - v_offset,
  77                         0, w, pt))
  78                         return s;
  79         }
  80
  81         return shared_ptr<Signal>();
  82 }
  83
  84 void Header::clear_selection()
  85 {
  86         const vector< shared_ptr<Signal> > sigs(
  87                 _view.session().get_signals());
  88         BOOST_FOREACH(const shared_ptr<Signal> s, sigs) {
  89                 assert(s);
  90                 s->select(false);
  91         }
  92
  93         update();
  94 }
  95
  96 void Header::paintEvent(QPaintEvent*)
  97 {
  98         const int w = width();
  99         const vector< shared_ptr<Signal> > sigs(
 100                 _view.session().get_signals());
 101
 102         QPainter painter(this);
 103         painter.setRenderHint(QPainter::Antialiasing);
 104
 105         const int v_offset = _view.v_offset();
 106         const bool dragging = !_drag_sigs.empty();
 107         BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 108         {
 109                 assert(s);
 110
 111                 const int y = s->get_v_offset() - v_offset;
 112                 const bool highlight = !dragging && s->pt_in_label_rect(
 113                         y, 0, w, _mouse_point);
 114                 s->paint_label(painter, y, w, highlight);
 115         }
 116
 117         painter.end();
 118 }
 119
 120 void Header::mousePressEvent(QMouseEvent *event)
 121 {
 122         assert(event);
 123
 124         const vector< shared_ptr<Signal> > sigs(
 125                 _view.session().get_signals());
 126
 127         if (event->button() & Qt::LeftButton) {
 128                 _mouse_down_point = event->pos();
 129
 130                 // Save the offsets of any signals which will be dragged
 131                 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 132                         if (s->selected())
 133                                 _drag_sigs.push_back(
 134                                         make_pair(s, s->get_v_offset()));
 135         }
 136
 137         // Select the signal if it has been clicked
 138         const shared_ptr<Signal> mouse_over_signal =
 139                 get_mouse_over_signal(event->pos());
 140         if (mouse_over_signal) {
 141                 if (mouse_over_signal->selected())
 142                         mouse_over_signal->select(false);
 143                 else {
 144                         mouse_over_signal->select(true);
 145
 146                         if (~QApplication::keyboardModifiers() &
 147                                 Qt::ControlModifier)
 148                                 _drag_sigs.clear();
 149
 150                         // Add the signal to the drag list
 151                         if (event->button() & Qt::LeftButton)
 152                                 _drag_sigs.push_back(
 153                                         make_pair(mouse_over_signal,
 154                                         mouse_over_signal->get_v_offset()));
 155                 }
 156         }
 157
 158         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 159                 // Unselect all other signals because the Ctrl is not
 160                 // pressed
 161                 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
 162                         if (s != mouse_over_signal)
 163                                 s->select(false);
 164         }
 165
 166         selection_changed();
 167         update();
 168 }
 169
 170 void Header::mouseReleaseEvent(QMouseEvent *event)
 171 {
 172         assert(event);
 173         if (event->button() == Qt::LeftButton) {
 174                 _drag_sigs.clear();
 175                 _view.normalize_layout();
 176         }
 177 }
 178
 179 void Header::mouseMoveEvent(QMouseEvent *event)
 180 {
 181         assert(event);
 182         _mouse_point = event->pos();
 183
 184         // Move the signals if we are dragging
 185         if (!_drag_sigs.empty()) {
 186                 const int delta = event->pos().y() - _mouse_down_point.y();
 187
 188                 for (std::list<std::pair<boost::weak_ptr<Signal>,
 189                         int> >::iterator i = _drag_sigs.begin();
 190                         i != _drag_sigs.end(); i++) {
 191                         const boost::shared_ptr<Signal> sig((*i).first);
 192                         if (sig) {
 193                                 const int y = (*i).second + delta;
 194                                 const int y_snap =
 195                                         ((y + View::SignalSnapGridSize / 2) /
 196                                                 View::SignalSnapGridSize) *
 197                                                 View::SignalSnapGridSize;
 198                                 sig->set_v_offset(y_snap);
 199
 200                                 // Ensure the signal is selected
 201                                 sig->select();
 202                         }
 203
 204                 }
 205
 206                 signals_moved();
 207         }
 208
 209         update();
 210 }
 211
 212 void Header::leaveEvent(QEvent*)
 213 {
 214         _mouse_point = QPoint(-1, -1);
 215         update();
 216 }
 217
 218 void Header::contextMenuEvent(QContextMenuEvent *event)
 219 {
 220         const shared_ptr<Signal> s = get_mouse_over_signal(_mouse_point);
 221
 222         if (!s)
 223                 return;
 224
 225         QMenu menu(this);
 226         menu.addAction(_action_set_name);
 227         menu.addAction(_action_set_colour);
 228
 229         _context_signal = s;
 230         menu.exec(event->globalPos());
 231         _context_signal.reset();
 232 }
 233
 234 void Header::on_action_set_name_triggered()
 235 {
 236         bool ok = false;
 237
 238         shared_ptr<view::Signal> context_signal = _context_signal;
 239         if (!context_signal)
 240                 return;
 241
 242         const QString new_label = QInputDialog::getText(this, tr("Set Name"),
 243                 tr("Name"), QLineEdit::Normal, context_signal->get_name(), &ok);
 244
 245         if (ok)
 246                 context_signal->set_name(new_label);
 247 }
 248
 249 void Header::on_action_set_colour_triggered()
 250 {
 251         shared_ptr<view::Signal> context_signal = _context_signal;
 252         if (!context_signal)
 253                 return;
 254
 255         const QColor new_colour = QColorDialog::getColor(
 256                 context_signal->get_colour(), this, tr("Set Colour"));
 257
 258         if (new_colour.isValid())
 259                 context_signal->set_colour(new_colour);
 260 }
 261
 262 void Header::on_signals_changed()
 263 {
 264         const vector< shared_ptr<Signal> > sigs(_view.session().get_signals());
 265         BOOST_FOREACH(shared_ptr<Signal> s, sigs) {
 266                 assert(s);
 267                 connect(s.get(), SIGNAL(text_changed()), this, SLOT(update()));
 268         }
 269 }
 270
 271 void Header::on_signals_moved()
 272 {
 273         update();
 274 }
 275
 276
 277 } // namespace view
 278 } // namespace pv