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