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