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