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 boost::shared_ptr;
  40 using std::max;
  41 using std::make_pair;
  42 using std::pair;
  43 using std::vector;
  44
  45 namespace pv {
  46 namespace view {
  47
  48 const int Header::Padding = 12;
  49
  50 Header::Header(View &parent) :
  51         MarginWidget(parent),
  52         _dragging(false)
  53 {
  54         setFocusPolicy(Qt::ClickFocus);
  55         setMouseTracking(true);
  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         // Trigger the initial event manually. The default device has signals
  64         // which were created before this object came into being
  65         on_signals_changed();
  66 }
  67
  68 QSize Header::sizeHint() const
  69 {
  70         int max_width = 0;
  71
  72         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  73         BOOST_FOREACH(shared_ptr<Trace> t, traces) {
  74                 assert(t);
  75
  76                 if (t->enabled()) {
  77                         max_width = max(max_width, (int)t->get_label_rect(0).width());
  78                 }
  79         }
  80
  81         return QSize(max_width + Padding, 0);
  82 }
  83
  84 shared_ptr<Trace> Header::get_mouse_over_trace(const QPoint &pt)
  85 {
  86         const int w = width();
  87         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  88
  89         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  90         {
  91                 assert(t);
  92                 if (t->pt_in_label_rect(0, w, pt))
  93                         return t;
  94         }
  95
  96         return shared_ptr<Trace>();
  97 }
  98
  99 void Header::clear_selection()
 100 {
 101         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 102         BOOST_FOREACH(const shared_ptr<Trace> t, traces) {
 103                 assert(t);
 104                 t->select(false);
 105         }
 106
 107         update();
 108 }
 109
 110 void Header::paintEvent(QPaintEvent*)
 111 {
 112         const int w = width();
 113         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 114
 115         QPainter painter(this);
 116         painter.setRenderHint(QPainter::Antialiasing);
 117
 118         const bool dragging = !_drag_traces.empty();
 119         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 120         {
 121                 assert(t);
 122
 123                 const bool highlight = !dragging && t->pt_in_label_rect(
 124                         0, w, _mouse_point);
 125                 t->paint_label(painter, w, highlight);
 126         }
 127
 128         painter.end();
 129 }
 130
 131 void Header::mousePressEvent(QMouseEvent *event)
 132 {
 133         assert(event);
 134
 135         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 136
 137         if (event->button() & Qt::LeftButton) {
 138                 _mouse_down_point = event->pos();
 139
 140                 // Save the offsets of any signals which will be dragged
 141                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 142                         if (t->selected())
 143                                 _drag_traces.push_back(
 144                                         make_pair(t, t->get_v_offset()));
 145         }
 146
 147         // Select the signal if it has been clicked
 148         const shared_ptr<Trace> mouse_over_trace =
 149                 get_mouse_over_trace(event->pos());
 150         if (mouse_over_trace) {
 151                 if (mouse_over_trace->selected())
 152                         mouse_over_trace->select(false);
 153                 else {
 154                         mouse_over_trace->select(true);
 155
 156                         if (~QApplication::keyboardModifiers() &
 157                                 Qt::ControlModifier)
 158                                 _drag_traces.clear();
 159
 160                         // Add the signal to the drag list
 161                         if (event->button() & Qt::LeftButton)
 162                                 _drag_traces.push_back(
 163                                         make_pair(mouse_over_trace,
 164                                         mouse_over_trace->get_v_offset()));
 165                 }
 166         }
 167
 168         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 169                 // Unselect all other signals because the Ctrl is not
 170                 // pressed
 171                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 172                         if (t != mouse_over_trace)
 173                                 t->select(false);
 174         }
 175
 176         selection_changed();
 177         update();
 178 }
 179
 180 void Header::mouseReleaseEvent(QMouseEvent *event)
 181 {
 182         using pv::widgets::Popup;
 183
 184         assert(event);
 185         if (event->button() == Qt::LeftButton) {
 186                 if (_dragging)
 187                         _view.normalize_layout();
 188                 else
 189                 {
 190                         const shared_ptr<Trace> mouse_over_trace =
 191                                 get_mouse_over_trace(event->pos());
 192                         if (mouse_over_trace) {
 193                                 Popup *const p =
 194                                         mouse_over_trace->create_popup(&_view);
 195                                 p->set_position(mapToGlobal(QPoint(width(),
 196                                         mouse_over_trace->get_y())),
 197                                         Popup::Right);
 198                                 p->show();
 199                         }
 200                 }
 201
 202                 _dragging = false;
 203                 _drag_traces.clear();
 204         }
 205 }
 206
 207 void Header::mouseMoveEvent(QMouseEvent *event)
 208 {
 209         assert(event);
 210         _mouse_point = event->pos();
 211
 212         if (!(event->buttons() & Qt::LeftButton))
 213                 return;
 214
 215         if ((event->pos() - _mouse_down_point).manhattanLength() <
 216                 QApplication::startDragDistance())
 217                 return;
 218
 219         // Move the signals if we are dragging
 220         if (!_drag_traces.empty())
 221         {
 222                 _dragging = true;
 223
 224                 const int delta = event->pos().y() - _mouse_down_point.y();
 225
 226                 for (std::list<std::pair<boost::weak_ptr<Trace>,
 227                         int> >::iterator i = _drag_traces.begin();
 228                         i != _drag_traces.end(); i++) {
 229                         const boost::shared_ptr<Trace> trace((*i).first);
 230                         if (trace) {
 231                                 const int y = (*i).second + delta;
 232                                 const int y_snap =
 233                                         ((y + View::SignalSnapGridSize / 2) /
 234                                                 View::SignalSnapGridSize) *
 235                                                 View::SignalSnapGridSize;
 236                                 trace->set_v_offset(y_snap);
 237
 238                                 // Ensure the trace is selected
 239                                 trace->select();
 240                         }
 241
 242                 }
 243
 244                 signals_moved();
 245         }
 246
 247         update();
 248 }
 249
 250 void Header::leaveEvent(QEvent*)
 251 {
 252         _mouse_point = QPoint(-1, -1);
 253         update();
 254 }
 255
 256 void Header::contextMenuEvent(QContextMenuEvent *event)
 257 {
 258         const shared_ptr<Trace> t = get_mouse_over_trace(_mouse_point);
 259
 260         if (t)
 261                 t->create_context_menu(this)->exec(event->globalPos());
 262 }
 263
 264 void Header::keyPressEvent(QKeyEvent *e)
 265 {
 266         assert(e);
 267
 268         switch (e->key())
 269         {
 270         case Qt::Key_Delete:
 271         {
 272                 const vector< shared_ptr<Trace> > traces(_view.get_traces());
 273                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 274                         if (t->selected())
 275                                 t->delete_pressed();
 276                 break;
 277         }
 278         }
 279 }
 280
 281 void Header::on_signals_changed()
 282 {
 283         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 284         BOOST_FOREACH(shared_ptr<Trace> t, traces) {
 285                 assert(t);
 286                 connect(t.get(), SIGNAL(visibility_changed()),
 287                         this, SLOT(on_trace_changed()));
 288                 connect(t.get(), SIGNAL(text_changed()),
 289                         this, SLOT(on_trace_changed()));
 290                 connect(t.get(), SIGNAL(colour_changed()),
 291                         this, SLOT(update()));
 292         }
 293 }
 294
 295 void Header::on_signals_moved()
 296 {
 297         update();
 298 }
 299
 300 void Header::on_trace_changed()
 301 {
 302         update();
 303         geometry_updated();
 304 }
 305
 306 } // namespace view
 307 } // namespace pv