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