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 using namespace boost;
  38 using namespace std;
  39
  40 namespace pv {
  41 namespace view {
  42
  43 Header::Header(View &parent) :
  44         MarginWidget(parent)
  45 {
  46         setMouseTracking(true);
  47
  48         connect(&_view.session(), SIGNAL(signals_changed()),
  49                 this, SLOT(on_signals_changed()));
  50
  51         connect(&_view, SIGNAL(signals_moved()),
  52                 this, SLOT(on_signals_moved()));
  53 }
  54
  55 shared_ptr<Trace> Header::get_mouse_over_trace(const QPoint &pt)
  56 {
  57         const int w = width();
  58         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  59
  60         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  61         {
  62                 assert(t);
  63                 if (t->pt_in_label_rect(0, w, pt))
  64                         return t;
  65         }
  66
  67         return shared_ptr<Trace>();
  68 }
  69
  70 void Header::clear_selection()
  71 {
  72         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  73         BOOST_FOREACH(const shared_ptr<Trace> t, traces) {
  74                 assert(t);
  75                 t->select(false);
  76         }
  77
  78         update();
  79 }
  80
  81 void Header::paintEvent(QPaintEvent*)
  82 {
  83         const int w = width();
  84         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  85
  86         QPainter painter(this);
  87         painter.setRenderHint(QPainter::Antialiasing);
  88
  89         const bool dragging = !_drag_traces.empty();
  90         BOOST_FOREACH(const shared_ptr<Trace> t, traces)
  91         {
  92                 assert(t);
  93
  94                 const bool highlight = !dragging && t->pt_in_label_rect(
  95                         0, w, _mouse_point);
  96                 t->paint_label(painter, w, highlight);
  97         }
  98
  99         painter.end();
 100 }
 101
 102 void Header::mousePressEvent(QMouseEvent *event)
 103 {
 104         assert(event);
 105
 106         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 107
 108         if (event->button() & Qt::LeftButton) {
 109                 _mouse_down_point = event->pos();
 110
 111                 // Save the offsets of any signals which will be dragged
 112                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 113                         if (t->selected())
 114                                 _drag_traces.push_back(
 115                                         make_pair(t, t->get_v_offset()));
 116         }
 117
 118         // Select the signal if it has been clicked
 119         const shared_ptr<Trace> mouse_over_trace =
 120                 get_mouse_over_trace(event->pos());
 121         if (mouse_over_trace) {
 122                 if (mouse_over_trace->selected())
 123                         mouse_over_trace->select(false);
 124                 else {
 125                         mouse_over_trace->select(true);
 126
 127                         if (~QApplication::keyboardModifiers() &
 128                                 Qt::ControlModifier)
 129                                 _drag_traces.clear();
 130
 131                         // Add the signal to the drag list
 132                         if (event->button() & Qt::LeftButton)
 133                                 _drag_traces.push_back(
 134                                         make_pair(mouse_over_trace,
 135                                         mouse_over_trace->get_v_offset()));
 136                 }
 137         }
 138
 139         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 140                 // Unselect all other signals because the Ctrl is not
 141                 // pressed
 142                 BOOST_FOREACH(const shared_ptr<Trace> t, traces)
 143                         if (t != mouse_over_trace)
 144                                 t->select(false);
 145         }
 146
 147         selection_changed();
 148         update();
 149 }
 150
 151 void Header::mouseReleaseEvent(QMouseEvent *event)
 152 {
 153         assert(event);
 154         if (event->button() == Qt::LeftButton) {
 155                 _drag_traces.clear();
 156                 _view.normalize_layout();
 157         }
 158 }
 159
 160 void Header::mouseMoveEvent(QMouseEvent *event)
 161 {
 162         assert(event);
 163         _mouse_point = event->pos();
 164
 165         // Move the signals if we are dragging
 166         if (!_drag_traces.empty()) {
 167                 const int delta = event->pos().y() - _mouse_down_point.y();
 168
 169                 for (std::list<std::pair<boost::weak_ptr<Trace>,
 170                         int> >::iterator i = _drag_traces.begin();
 171                         i != _drag_traces.end(); i++) {
 172                         const boost::shared_ptr<Trace> trace((*i).first);
 173                         if (trace) {
 174                                 const int y = (*i).second + delta;
 175                                 const int y_snap =
 176                                         ((y + View::SignalSnapGridSize / 2) /
 177                                                 View::SignalSnapGridSize) *
 178                                                 View::SignalSnapGridSize;
 179                                 trace->set_v_offset(y_snap);
 180
 181                                 // Ensure the trace is selected
 182                                 trace->select();
 183                         }
 184
 185                 }
 186
 187                 signals_moved();
 188         }
 189
 190         update();
 191 }
 192
 193 void Header::leaveEvent(QEvent*)
 194 {
 195         _mouse_point = QPoint(-1, -1);
 196         update();
 197 }
 198
 199 void Header::contextMenuEvent(QContextMenuEvent *event)
 200 {
 201         const shared_ptr<Trace> t = get_mouse_over_trace(_mouse_point);
 202
 203         if (t)
 204                 t->create_context_menu(this)->exec(event->globalPos());
 205 }
 206
 207 void Header::on_signals_changed()
 208 {
 209         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 210         BOOST_FOREACH(shared_ptr<Trace> t, traces) {
 211                 assert(t);
 212                 connect(t.get(), SIGNAL(text_changed()), this, SLOT(update()));
 213         }
 214 }
 215
 216 void Header::on_signals_moved()
 217 {
 218         update();
 219 }
 220
 221
 222 } // namespace view
 223 } // namespace pv