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 #include <pv/widgets/popup.h>
  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         _dragging(false)
  48 {
  49         setMouseTracking(true);
  50
  51         connect(&_view.session(), SIGNAL(signals_changed()),
  52                 this, SLOT(on_signals_changed()));
  53
  54         connect(&_view, SIGNAL(signals_moved()),
  55                 this, SLOT(on_signals_moved()));
  56 }
  57
  58 shared_ptr<Trace> Header::get_mouse_over_trace(const QPoint &pt)
  59 {
  60         const int w = width();
  61         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  62
  63         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  64         {
  65                 assert(t);
  66                 if (t->pt_in_label_rect(0, w, pt))
  67                         return t;
  68         }
  69
  70         return shared_ptr<Trace>();
  71 }
  72
  73 void Header::clear_selection()
  74 {
  75         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  76         BOOST_FOREACH(const shared_ptr<Trace> t, traces) {
  77                 assert(t);
  78                 t->select(false);
  79         }
  80
  81         update();
  82 }
  83
  84 void Header::paintEvent(QPaintEvent*)
  85 {
  86         const int w = width();
  87         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  88
  89         QPainter painter(this);
  90         painter.setRenderHint(QPainter::Antialiasing);
  91
  92         const bool dragging = !_drag_traces.empty();
  93         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  94         {
  95                 assert(t);
  96
  97                 const bool highlight = !dragging && t->pt_in_label_rect(
  98                         0, w, _mouse_point);
  99                 t->paint_label(painter, 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<Trace> > traces(_view.get_traces());
 110
 111         if (event->button() & Qt::LeftButton) {
 112                 _mouse_down_point = event->pos();
 113
 114                 // Save the offsets of any signals which will be dragged
 115                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 116                         if (t->selected())
 117                                 _drag_traces.push_back(
 118                                         make_pair(t, t->get_v_offset()));
 119         }
 120
 121         // Select the signal if it has been clicked
 122         const shared_ptr<Trace> mouse_over_trace =
 123                 get_mouse_over_trace(event->pos());
 124         if (mouse_over_trace) {
 125                 if (mouse_over_trace->selected())
 126                         mouse_over_trace->select(false);
 127                 else {
 128                         mouse_over_trace->select(true);
 129
 130                         if (~QApplication::keyboardModifiers() &
 131                                 Qt::ControlModifier)
 132                                 _drag_traces.clear();
 133
 134                         // Add the signal to the drag list
 135                         if (event->button() & Qt::LeftButton)
 136                                 _drag_traces.push_back(
 137                                         make_pair(mouse_over_trace,
 138                                         mouse_over_trace->get_v_offset()));
 139                 }
 140         }
 141
 142         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 143                 // Unselect all other signals because the Ctrl is not
 144                 // pressed
 145                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 146                         if (t != mouse_over_trace)
 147                                 t->select(false);
 148         }
 149
 150         selection_changed();
 151         update();
 152 }
 153
 154 void Header::mouseReleaseEvent(QMouseEvent *event)
 155 {
 156         using pv::widgets::Popup;
 157
 158         assert(event);
 159         if (event->button() == Qt::LeftButton) {
 160                 if (_dragging)
 161                         _view.normalize_layout();
 162                 else
 163                 {
 164                         const shared_ptr<Trace> mouse_over_trace =
 165                                 get_mouse_over_trace(event->pos());
 166                         if (mouse_over_trace) {
 167                                 Popup *const p =
 168                                         mouse_over_trace->create_popup(&_view);
 169                                 p->set_position(mapToGlobal(QPoint(width(),
 170                                         mouse_over_trace->get_y())),
 171                                         Popup::Right);
 172                                 p->show();
 173                         }
 174                 }
 175
 176                 _dragging = false;
 177                 _drag_traces.clear();
 178         }
 179 }
 180
 181 void Header::mouseMoveEvent(QMouseEvent *event)
 182 {
 183         assert(event);
 184         _mouse_point = event->pos();
 185
 186         if (!(event->buttons() & Qt::LeftButton))
 187                 return;
 188
 189         if ((event->pos() - _mouse_down_point).manhattanLength() <
 190                 QApplication::startDragDistance())
 191                 return;
 192
 193         // Move the signals if we are dragging
 194         if (!_drag_traces.empty())
 195         {
 196                 _dragging = true;
 197
 198                 const int delta = event->pos().y() - _mouse_down_point.y();
 199
 200                 for (std::list<std::pair<boost::weak_ptr<Trace>,
 201                         int> >::iterator i = _drag_traces.begin();
 202                         i != _drag_traces.end(); i++) {
 203                         const boost::shared_ptr<Trace> trace((*i).first);
 204                         if (trace) {
 205                                 const int y = (*i).second + delta;
 206                                 const int y_snap =
 207                                         ((y + View::SignalSnapGridSize / 2) /
 208                                                 View::SignalSnapGridSize) *
 209                                                 View::SignalSnapGridSize;
 210                                 trace->set_v_offset(y_snap);
 211
 212                                 // Ensure the trace is selected
 213                                 trace->select();
 214                         }
 215
 216                 }
 217
 218                 signals_moved();
 219         }
 220
 221         update();
 222 }
 223
 224 void Header::leaveEvent(QEvent*)
 225 {
 226         _mouse_point = QPoint(-1, -1);
 227         update();
 228 }
 229
 230 void Header::contextMenuEvent(QContextMenuEvent *event)
 231 {
 232         const shared_ptr<Trace> t = get_mouse_over_trace(_mouse_point);
 233
 234         if (t)
 235                 t->create_context_menu(this)->exec(event->globalPos());
 236 }
 237
 238 void Header::on_signals_changed()
 239 {
 240         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 241         BOOST_FOREACH(shared_ptr<Trace> t, traces) {
 242                 assert(t);
 243                 connect(t.get(), SIGNAL(text_changed()), this, SLOT(update()));
 244         }
 245 }
 246
 247 void Header::on_signals_moved()
 248 {
 249         update();
 250 }
 251
 252
 253 } // namespace view
 254 } // namespace pv