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