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