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 <QMenu>
  33 #include <QMouseEvent>
  34 #include <QPainter>
  35 #include <QRect>
  36
  37 using namespace boost;
  38 using namespace std;
  39
  40 namespace pv {
  41 namespace view {
  42
  43 Header::Header(View &parent) :
  44         MarginWidget(parent),
  45         _dragging(false)
  46 {
  47         setMouseTracking(true);
  48
  49         connect(&_view.session(), SIGNAL(signals_changed()),
  50                 this, SLOT(on_signals_changed()));
  51
  52         connect(&_view, SIGNAL(signals_moved()),
  53                 this, SLOT(on_signals_moved()));
  54 }
  55
  56 shared_ptr<Trace> Header::get_mouse_over_trace(const QPoint &pt)
  57 {
  58         const int w = width();
  59         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  60
  61         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  62         {
  63                 assert(t);
  64                 if (t->pt_in_label_rect(0, w, pt))
  65                         return t;
  66         }
  67
  68         return shared_ptr<Trace>();
  69 }
  70
  71 void Header::clear_selection()
  72 {
  73         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  74         BOOST_FOREACH(const shared_ptr<Trace> t, traces) {
  75                 assert(t);
  76                 t->select(false);
  77         }
  78
  79         update();
  80 }
  81
  82 void Header::paintEvent(QPaintEvent*)
  83 {
  84         const int w = width();
  85         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  86
  87         QPainter painter(this);
  88         painter.setRenderHint(QPainter::Antialiasing);
  89
  90         const bool dragging = !_drag_traces.empty();
  91         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  92         {
  93                 assert(t);
  94
  95                 const bool highlight = !dragging && t->pt_in_label_rect(
  96                         0, w, _mouse_point);
  97                 t->paint_label(painter, w, highlight);
  98         }
  99
 100         painter.end();
 101 }
 102
 103 void Header::mousePressEvent(QMouseEvent *event)
 104 {
 105         assert(event);
 106
 107         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 108
 109         if (event->button() & Qt::LeftButton) {
 110                 _mouse_down_point = event->pos();
 111
 112                 // Save the offsets of any signals which will be dragged
 113                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 114                         if (t->selected())
 115                                 _drag_traces.push_back(
 116                                         make_pair(t, t->get_v_offset()));
 117         }
 118
 119         // Select the signal if it has been clicked
 120         const shared_ptr<Trace> mouse_over_trace =
 121                 get_mouse_over_trace(event->pos());
 122         if (mouse_over_trace) {
 123                 if (mouse_over_trace->selected())
 124                         mouse_over_trace->select(false);
 125                 else {
 126                         mouse_over_trace->select(true);
 127
 128                         if (~QApplication::keyboardModifiers() &
 129                                 Qt::ControlModifier)
 130                                 _drag_traces.clear();
 131
 132                         // Add the signal to the drag list
 133                         if (event->button() & Qt::LeftButton)
 134                                 _drag_traces.push_back(
 135                                         make_pair(mouse_over_trace,
 136                                         mouse_over_trace->get_v_offset()));
 137                 }
 138         }
 139
 140         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 141                 // Unselect all other signals because the Ctrl is not
 142                 // pressed
 143                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 144                         if (t != mouse_over_trace)
 145                                 t->select(false);
 146         }
 147
 148         selection_changed();
 149         update();
 150 }
 151
 152 void Header::mouseReleaseEvent(QMouseEvent *event)
 153 {
 154         assert(event);
 155         if (event->button() == Qt::LeftButton) {
 156                 _dragging = false;
 157                 _drag_traces.clear();
 158                 _view.normalize_layout();
 159         }
 160 }
 161
 162 void Header::mouseMoveEvent(QMouseEvent *event)
 163 {
 164         assert(event);
 165         _mouse_point = event->pos();
 166
 167         if (!(event->buttons() & Qt::LeftButton))
 168                 return;
 169
 170         if ((event->pos() - _mouse_down_point).manhattanLength() <
 171                 QApplication::startDragDistance())
 172                 return;
 173
 174         // Move the signals if we are dragging
 175         if (!_drag_traces.empty())
 176         {
 177                 _dragging = true;
 178
 179                 const int delta = event->pos().y() - _mouse_down_point.y();
 180
 181                 for (std::list<std::pair<boost::weak_ptr<Trace>,
 182                         int> >::iterator i = _drag_traces.begin();
 183                         i != _drag_traces.end(); i++) {
 184                         const boost::shared_ptr<Trace> trace((*i).first);
 185                         if (trace) {
 186                                 const int y = (*i).second + delta;
 187                                 const int y_snap =
 188                                         ((y + View::SignalSnapGridSize / 2) /
 189                                                 View::SignalSnapGridSize) *
 190                                                 View::SignalSnapGridSize;
 191                                 trace->set_v_offset(y_snap);
 192
 193                                 // Ensure the trace is selected
 194                                 trace->select();
 195                         }
 196
 197                 }
 198
 199                 signals_moved();
 200         }
 201
 202         update();
 203 }
 204
 205 void Header::leaveEvent(QEvent*)
 206 {
 207         _mouse_point = QPoint(-1, -1);
 208         update();
 209 }
 210
 211 void Header::contextMenuEvent(QContextMenuEvent *event)
 212 {
 213         const shared_ptr<Trace> t = get_mouse_over_trace(_mouse_point);
 214
 215         if (t)
 216                 t->create_context_menu(this)->exec(event->globalPos());
 217 }
 218
 219 void Header::on_signals_changed()
 220 {
 221         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 222         BOOST_FOREACH(shared_ptr<Trace> t, traces) {
 223                 assert(t);
 224                 connect(t.get(), SIGNAL(text_changed()), this, SLOT(update()));
 225         }
 226 }
 227
 228 void Header::on_signals_moved()
 229 {
 230         update();
 231 }
 232
 233
 234 } // namespace view
 235 } // namespace pv