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 std::max;
  38 using std::make_pair;
  39 using std::pair;
  40 using std::shared_ptr;
  41 using std::vector;
  42
  43 namespace pv {
  44 namespace view {
  45
  46 const int Header::Padding = 12;
  47 const int Header::BaselineOffset = 5;
  48
  49 Header::Header(View &parent) :
  50         MarginWidget(parent),
  51         _dragging(false)
  52 {
  53         setFocusPolicy(Qt::ClickFocus);
  54         setMouseTracking(true);
  55
  56         connect(&_view.session(), SIGNAL(signals_changed()),
  57                 this, SLOT(on_signals_changed()));
  58
  59         connect(&_view, SIGNAL(signals_moved()),
  60                 this, SLOT(on_signals_moved()));
  61
  62         // Trigger the initial event manually. The default device has signals
  63         // which were created before this object came into being
  64         on_signals_changed();
  65 }
  66
  67 QSize Header::sizeHint() const
  68 {
  69         int max_width = 0;
  70
  71         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  72         for (shared_ptr<Trace> t : traces) {
  73                 assert(t);
  74
  75                 if (t->enabled()) {
  76                         max_width = max(max_width, (int)t->label_rect(0).width());
  77                 }
  78         }
  79
  80         return QSize(max_width + Padding + BaselineOffset, 0);
  81 }
  82
  83 shared_ptr<Trace> Header::get_mouse_over_trace(const QPoint &pt)
  84 {
  85         const int w = width() - BaselineOffset;
  86         const vector< shared_ptr<Trace> > traces(_view.get_traces());
  87
  88         for (const shared_ptr<Trace> t : traces)
  89         {
  90                 assert(t);
  91                 if (t->enabled() && t->label_rect(w).contains(pt))
  92                         return t;
  93         }
  94
  95         return shared_ptr<Trace>();
  96 }
  97
  98 void Header::clear_selection()
  99 {
 100         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 101         for (const shared_ptr<Trace> t : traces) {
 102                 assert(t);
 103                 t->select(false);
 104         }
 105
 106         update();
 107 }
 108
 109 void Header::paintEvent(QPaintEvent*)
 110 {
 111         // The trace labels are not drawn with the arrows exactly on the
 112         // left edge of the widget, because then the selection shadow
 113         // would be clipped away.
 114         const int w = width() - BaselineOffset;
 115         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 116
 117         QPainter painter(this);
 118         painter.setRenderHint(QPainter::Antialiasing);
 119
 120         const bool dragging = !_drag_traces.empty();
 121         for (const shared_ptr<Trace> t : traces)
 122         {
 123                 assert(t);
 124
 125                 const bool highlight = !dragging &&
 126                         t->label_rect(w).contains(_mouse_point);
 127                 t->paint_label(painter, w, highlight);
 128         }
 129
 130         painter.end();
 131 }
 132
 133 void Header::mousePressEvent(QMouseEvent *event)
 134 {
 135         assert(event);
 136
 137         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 138
 139         if (event->button() & Qt::LeftButton) {
 140                 _mouse_down_point = event->pos();
 141
 142                 // Save the offsets of any signals which will be dragged
 143                 for (const shared_ptr<Trace> t : traces)
 144                         if (t->selected())
 145                                 _drag_traces.push_back(
 146                                         make_pair(t, t->v_offset()));
 147         }
 148
 149         // Select the signal if it has been clicked
 150         const shared_ptr<Trace> mouse_over_trace =
 151                 get_mouse_over_trace(event->pos());
 152         if (mouse_over_trace) {
 153                 if (mouse_over_trace->selected())
 154                         mouse_over_trace->select(false);
 155                 else {
 156                         mouse_over_trace->select(true);
 157
 158                         if (~QApplication::keyboardModifiers() &
 159                                 Qt::ControlModifier)
 160                                 _drag_traces.clear();
 161
 162                         // Add the signal to the drag list
 163                         if (event->button() & Qt::LeftButton)
 164                                 _drag_traces.push_back(
 165                                         make_pair(mouse_over_trace,
 166                                         mouse_over_trace->v_offset()));
 167                 }
 168         }
 169
 170         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 171                 // Unselect all other signals because the Ctrl is not
 172                 // pressed
 173                 for (const shared_ptr<Trace> t : traces)
 174                         if (t != mouse_over_trace)
 175                                 t->select(false);
 176         }
 177
 178         selection_changed();
 179         update();
 180 }
 181
 182 void Header::mouseReleaseEvent(QMouseEvent *event)
 183 {
 184         using pv::widgets::Popup;
 185
 186         assert(event);
 187         if (event->button() == Qt::LeftButton) {
 188                 if (_dragging)
 189                         _view.normalize_layout();
 190                 else
 191                 {
 192                         const shared_ptr<Trace> mouse_over_trace =
 193                                 get_mouse_over_trace(event->pos());
 194                         if (mouse_over_trace) {
 195                                 const int w = width() - BaselineOffset;
 196                                 Popup *const p =
 197                                         mouse_over_trace->create_popup(&_view);
 198                                 p->set_position(mapToGlobal(QPoint(w,
 199                                         mouse_over_trace->get_y())),
 200                                         Popup::Right);
 201                                 p->show();
 202                         }
 203                 }
 204
 205                 _dragging = false;
 206                 _drag_traces.clear();
 207         }
 208 }
 209
 210 void Header::mouseMoveEvent(QMouseEvent *event)
 211 {
 212         assert(event);
 213         _mouse_point = event->pos();
 214
 215         if (!(event->buttons() & Qt::LeftButton))
 216                 return;
 217
 218         if ((event->pos() - _mouse_down_point).manhattanLength() <
 219                 QApplication::startDragDistance())
 220                 return;
 221
 222         // Move the signals if we are dragging
 223         if (!_drag_traces.empty())
 224         {
 225                 _dragging = true;
 226
 227                 const int delta = event->pos().y() - _mouse_down_point.y();
 228
 229                 for (auto i = _drag_traces.begin(); i != _drag_traces.end(); i++) {
 230                         const std::shared_ptr<Trace> trace((*i).first);
 231                         if (trace) {
 232                                 const int y = (*i).second + delta;
 233                                 const int y_snap =
 234                                         ((y + View::SignalSnapGridSize / 2) /
 235                                                 View::SignalSnapGridSize) *
 236                                                 View::SignalSnapGridSize;
 237                                 trace->set_v_offset(y_snap);
 238
 239                                 // Ensure the trace is selected
 240                                 trace->select();
 241                         }
 242
 243                 }
 244
 245                 signals_moved();
 246         }
 247
 248         update();
 249 }
 250
 251 void Header::leaveEvent(QEvent*)
 252 {
 253         _mouse_point = QPoint(-1, -1);
 254         update();
 255 }
 256
 257 void Header::contextMenuEvent(QContextMenuEvent *event)
 258 {
 259         const shared_ptr<Trace> t = get_mouse_over_trace(_mouse_point);
 260
 261         if (t)
 262                 t->create_context_menu(this)->exec(event->globalPos());
 263 }
 264
 265 void Header::keyPressEvent(QKeyEvent *e)
 266 {
 267         assert(e);
 268
 269         switch (e->key())
 270         {
 271         case Qt::Key_Delete:
 272         {
 273                 const vector< shared_ptr<Trace> > traces(_view.get_traces());
 274                 for (const shared_ptr<Trace> t : traces)
 275                         if (t->selected())
 276                                 t->delete_pressed();
 277                 break;
 278         }
 279         }
 280 }
 281
 282 void Header::on_signals_changed()
 283 {
 284         const vector< shared_ptr<Trace> > traces(_view.get_traces());
 285         for (shared_ptr<Trace> t : traces) {
 286                 assert(t);
 287                 connect(t.get(), SIGNAL(visibility_changed()),
 288                         this, SLOT(on_trace_changed()));
 289                 connect(t.get(), SIGNAL(text_changed()),
 290                         this, SLOT(on_trace_changed()));
 291                 connect(t.get(), SIGNAL(colour_changed()),
 292                         this, SLOT(update()));
 293         }
 294 }
 295
 296 void Header::on_signals_moved()
 297 {
 298         update();
 299 }
 300
 301 void Header::on_trace_changed()
 302 {
 303         update();
 304         geometry_updated();
 305 }
 306
 307 } // namespace view
 308 } // namespace pv