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