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 <QApplication>
  30 #include <QMenu>
  31 #include <QMouseEvent>
  32 #include <QPainter>
  33 #include <QRect>
  34
  35 #include <pv/widgets/popup.h>
  36
  37 using boost::shared_ptr;
  38 using std::max;
  39 using std::make_pair;
  40 using std::pair;
  41 using std::vector;
  42
  43 namespace pv {
  44 namespace view {
  45
  46 const int Header::Padding = 12;
  47
  48 Header::Header(View &parent) :
  49         MarginWidget(parent),
  50         _dragging(false)
  51 {
  52         setFocusPolicy(Qt::ClickFocus);
  53         setMouseTracking(true);
  54
  55         connect(&_view.session(), SIGNAL(signals_changed()),
  56                 this, SLOT(on_signals_changed()));
  57
  58         connect(&_view, SIGNAL(signals_moved()),
  59                 this, SLOT(on_signals_moved()));
  60
  61         // Trigger the initial event manually. The default device has signals
  62         // which were created before this object came into being
  63         on_signals_changed();
  64 }
  65
  66 QSize Header::sizeHint() const
  67 {
  68         int max_width = 0;
  69
  70         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  71         for (shared_ptr<Trace> t : traces) {
  72                 assert(t);
  73
  74                 if (t->enabled()) {
  75                         max_width = max(max_width, (int)t->get_label_rect(0).width());
  76                 }
  77         }
  78
  79         return QSize(max_width + Padding, 0);
  80 }
  81
  82 shared_ptr<Trace> Header::get_mouse_over_trace(const QPoint &pt)
  83 {
  84         const int w = width();
  85         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  86
  87         for (const shared_ptr<Trace> t : traces)
  88         {
  89                 assert(t);
  90                 if (t->pt_in_label_rect(0, w, pt))
  91                         return t;
  92         }
  93
  94         return shared_ptr<Trace>();
  95 }
  96
  97 void Header::clear_selection()
  98 {
  99         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 100         for (const shared_ptr<Trace> t : traces) {
 101                 assert(t);
 102                 t->select(false);
 103         }
 104
 105         update();
 106 }
 107
 108 void Header::paintEvent(QPaintEvent*)
 109 {
 110         const int w = width();
 111         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 112
 113         QPainter painter(this);
 114         painter.setRenderHint(QPainter::Antialiasing);
 115
 116         const bool dragging = !_drag_traces.empty();
 117         for (const shared_ptr<Trace> t : traces)
 118         {
 119                 assert(t);
 120
 121                 const bool highlight = !dragging && t->pt_in_label_rect(
 122                         0, w, _mouse_point);
 123                 t->paint_label(painter, w, highlight);
 124         }
 125
 126         painter.end();
 127 }
 128
 129 void Header::mousePressEvent(QMouseEvent *event)
 130 {
 131         assert(event);
 132
 133         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 134
 135         if (event->button() & Qt::LeftButton) {
 136                 _mouse_down_point = event->pos();
 137
 138                 // Save the offsets of any signals which will be dragged
 139                 for (const shared_ptr<Trace> t : traces)
 140                         if (t->selected())
 141                                 _drag_traces.push_back(
 142                                         make_pair(t, t->get_v_offset()));
 143         }
 144
 145         // Select the signal if it has been clicked
 146         const shared_ptr<Trace> mouse_over_trace =
 147                 get_mouse_over_trace(event->pos());
 148         if (mouse_over_trace) {
 149                 if (mouse_over_trace->selected())
 150                         mouse_over_trace->select(false);
 151                 else {
 152                         mouse_over_trace->select(true);
 153
 154                         if (~QApplication::keyboardModifiers() &
 155                                 Qt::ControlModifier)
 156                                 _drag_traces.clear();
 157
 158                         // Add the signal to the drag list
 159                         if (event->button() & Qt::LeftButton)
 160                                 _drag_traces.push_back(
 161                                         make_pair(mouse_over_trace,
 162                                         mouse_over_trace->get_v_offset()));
 163                 }
 164         }
 165
 166         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 167                 // Unselect all other signals because the Ctrl is not
 168                 // pressed
 169                 for (const shared_ptr<Trace> t : traces)
 170                         if (t != mouse_over_trace)
 171                                 t->select(false);
 172         }
 173
 174         selection_changed();
 175         update();
 176 }
 177
 178 void Header::mouseReleaseEvent(QMouseEvent *event)
 179 {
 180         using pv::widgets::Popup;
 181
 182         assert(event);
 183         if (event->button() == Qt::LeftButton) {
 184                 if (_dragging)
 185                         _view.normalize_layout();
 186                 else
 187                 {
 188                         const shared_ptr<Trace> mouse_over_trace =
 189                                 get_mouse_over_trace(event->pos());
 190                         if (mouse_over_trace) {
 191                                 Popup *const p =
 192                                         mouse_over_trace->create_popup(&_view);
 193                                 p->set_position(mapToGlobal(QPoint(width(),
 194                                         mouse_over_trace->get_y())),
 195                                         Popup::Right);
 196                                 p->show();
 197                         }
 198                 }
 199
 200                 _dragging = false;
 201                 _drag_traces.clear();
 202         }
 203 }
 204
 205 void Header::mouseMoveEvent(QMouseEvent *event)
 206 {
 207         assert(event);
 208         _mouse_point = event->pos();
 209
 210         if (!(event->buttons() & Qt::LeftButton))
 211                 return;
 212
 213         if ((event->pos() - _mouse_down_point).manhattanLength() <
 214                 QApplication::startDragDistance())
 215                 return;
 216
 217         // Move the signals if we are dragging
 218         if (!_drag_traces.empty())
 219         {
 220                 _dragging = true;
 221
 222                 const int delta = event->pos().y() - _mouse_down_point.y();
 223
 224                 for (auto i = _drag_traces.begin(); i != _drag_traces.end(); i++) {
 225                         const boost::shared_ptr<Trace> trace((*i).first);
 226                         if (trace) {
 227                                 const int y = (*i).second + delta;
 228                                 const int y_snap =
 229                                         ((y + View::SignalSnapGridSize / 2) /
 230                                                 View::SignalSnapGridSize) *
 231                                                 View::SignalSnapGridSize;
 232                                 trace->set_v_offset(y_snap);
 233
 234                                 // Ensure the trace is selected
 235                                 trace->select();
 236                         }
 237
 238                 }
 239
 240                 signals_moved();
 241         }
 242
 243         update();
 244 }
 245
 246 void Header::leaveEvent(QEvent*)
 247 {
 248         _mouse_point = QPoint(-1, -1);
 249         update();
 250 }
 251
 252 void Header::contextMenuEvent(QContextMenuEvent *event)
 253 {
 254         const shared_ptr<Trace> t = get_mouse_over_trace(_mouse_point);
 255
 256         if (t)
 257                 t->create_context_menu(this)->exec(event->globalPos());
 258 }
 259
 260 void Header::keyPressEvent(QKeyEvent *e)
 261 {
 262         assert(e);
 263
 264         switch (e->key())
 265         {
 266         case Qt::Key_Delete:
 267         {
 268                 const vector< shared_ptr<Trace> > traces(_view.get_traces());
 269                 for (const shared_ptr<Trace> t : traces)
 270                         if (t->selected())
 271                                 t->delete_pressed();
 272                 break;
 273         }
 274         }
 275 }
 276
 277 void Header::on_signals_changed()
 278 {
 279         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 280         for (shared_ptr<Trace> t : traces) {
 281                 assert(t);
 282                 connect(t.get(), SIGNAL(visibility_changed()),
 283                         this, SLOT(on_trace_changed()));
 284                 connect(t.get(), SIGNAL(text_changed()),
 285                         this, SLOT(on_trace_changed()));
 286                 connect(t.get(), SIGNAL(colour_changed()),
 287                         this, SLOT(update()));
 288         }
 289 }
 290
 291 void Header::on_signals_moved()
 292 {
 293         update();
 294 }
 295
 296 void Header::on_trace_changed()
 297 {
 298         update();
 299         geometry_updated();
 300 }
 301
 302 } // namespace view
 303 } // namespace pv