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 <cassert>
  28 #include <algorithm>
  29
  30 #include <QApplication>
  31 #include <QMenu>
  32 #include <QMouseEvent>
  33 #include <QPainter>
  34 #include <QRect>
  35
  36 #include <pv/widgets/popup.h>
  37
  38 using std::max;
  39 using std::make_pair;
  40 using std::pair;
  41 using std::shared_ptr;
  42 using std::stable_sort;
  43 using std::vector;
  44
  45 namespace pv {
  46 namespace view {
  47
  48 const int Header::Padding = 12;
  49 const int Header::BaselineOffset = 5;
  50
  51 Header::Header(View &parent) :
  52         MarginWidget(parent),
  53         _dragging(false)
  54 {
  55         setFocusPolicy(Qt::ClickFocus);
  56         setMouseTracking(true);
  57
  58         connect(&_view.session(), SIGNAL(signals_changed()),
  59                 this, SLOT(on_signals_changed()));
  60
  61         connect(&_view, SIGNAL(signals_moved()),
  62                 this, SLOT(on_signals_moved()));
  63
  64         // Trigger the initial event manually. The default device has signals
  65         // which were created before this object came into being
  66         on_signals_changed();
  67 }
  68
  69 QSize Header::sizeHint() const
  70 {
  71         int max_width = 0;
  72
  73         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
  74         for (shared_ptr<RowItem> r : row_items) {
  75                 assert(r);
  76
  77                 if (r->enabled()) {
  78                         max_width = max(max_width, (int)r->label_rect(0).width());
  79                 }
  80         }
  81
  82         return QSize(max_width + Padding + BaselineOffset, 0);
  83 }
  84
  85 shared_ptr<RowItem> Header::get_mouse_over_row_item(const QPoint &pt)
  86 {
  87         const int w = width() - BaselineOffset;
  88         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
  89
  90         for (const shared_ptr<RowItem> r : row_items)
  91         {
  92                 assert(r);
  93                 if (r->enabled() && r->label_rect(w).contains(pt))
  94                         return r;
  95         }
  96
  97         return shared_ptr<RowItem>();
  98 }
  99
 100 void Header::clear_selection()
 101 {
 102         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 103         for (const shared_ptr<RowItem> r : row_items) {
 104                 assert(r);
 105                 r->select(false);
 106         }
 107
 108         update();
 109 }
 110
 111 void Header::paintEvent(QPaintEvent*)
 112 {
 113         // The trace labels are not drawn with the arrows exactly on the
 114         // left edge of the widget, because then the selection shadow
 115         // would be clipped away.
 116         const int w = width() - BaselineOffset;
 117
 118         vector< shared_ptr<RowItem> > row_items(_view.child_items());
 119         stable_sort(row_items.begin(), row_items.end(),
 120                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 121                         return a->v_offset() < b->v_offset(); });
 122
 123         QPainter painter(this);
 124         painter.setRenderHint(QPainter::Antialiasing);
 125
 126         const bool dragging = !_drag_row_items.empty();
 127         for (const shared_ptr<RowItem> r : row_items)
 128         {
 129                 assert(r);
 130
 131                 const bool highlight = !dragging &&
 132                         r->label_rect(w).contains(_mouse_point);
 133                 r->paint_label(painter, w, highlight);
 134         }
 135
 136         painter.end();
 137 }
 138
 139 void Header::mousePressEvent(QMouseEvent *event)
 140 {
 141         assert(event);
 142
 143         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 144
 145         if (event->button() & Qt::LeftButton) {
 146                 _mouse_down_point = event->pos();
 147
 148                 // Save the offsets of any signals which will be dragged
 149                 for (const shared_ptr<RowItem> r : row_items)
 150                         if (r->selected())
 151                                 _drag_row_items.push_back(
 152                                         make_pair(r, r->v_offset()));
 153         }
 154
 155         // Select the signal if it has been clicked
 156         const shared_ptr<RowItem> mouse_over_row_item =
 157                 get_mouse_over_row_item(event->pos());
 158         if (mouse_over_row_item) {
 159                 if (mouse_over_row_item->selected())
 160                         mouse_over_row_item->select(false);
 161                 else {
 162                         mouse_over_row_item->select(true);
 163
 164                         if (~QApplication::keyboardModifiers() &
 165                                 Qt::ControlModifier)
 166                                 _drag_row_items.clear();
 167
 168                         // Add the signal to the drag list
 169                         if (event->button() & Qt::LeftButton)
 170                                 _drag_row_items.push_back(
 171                                         make_pair(mouse_over_row_item,
 172                                         mouse_over_row_item->v_offset()));
 173                 }
 174         }
 175
 176         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 177                 // Unselect all other signals because the Ctrl is not
 178                 // pressed
 179                 for (const shared_ptr<RowItem> r : row_items)
 180                         if (r != mouse_over_row_item)
 181                                 r->select(false);
 182         }
 183
 184         selection_changed();
 185         update();
 186 }
 187
 188 void Header::mouseReleaseEvent(QMouseEvent *event)
 189 {
 190         using pv::widgets::Popup;
 191
 192         assert(event);
 193         if (event->button() == Qt::LeftButton) {
 194                 if (_dragging)
 195                         _view.normalize_layout();
 196                 else
 197                 {
 198                         const shared_ptr<RowItem> mouse_over_row_item =
 199                                 get_mouse_over_row_item(event->pos());
 200                         if (mouse_over_row_item) {
 201                                 const int w = width() - BaselineOffset;
 202                                 Popup *const p =
 203                                         mouse_over_row_item->create_popup(&_view);
 204                                 p->set_position(mapToGlobal(QPoint(w,
 205                                         mouse_over_row_item->get_y())),
 206                                         Popup::Right);
 207                                 p->show();
 208                         }
 209                 }
 210
 211                 _dragging = false;
 212                 _drag_row_items.clear();
 213         }
 214 }
 215
 216 void Header::mouseMoveEvent(QMouseEvent *event)
 217 {
 218         assert(event);
 219         _mouse_point = event->pos();
 220
 221         if (!(event->buttons() & Qt::LeftButton))
 222                 return;
 223
 224         if ((event->pos() - _mouse_down_point).manhattanLength() <
 225                 QApplication::startDragDistance())
 226                 return;
 227
 228         // Move the signals if we are dragging
 229         if (!_drag_row_items.empty())
 230         {
 231                 _dragging = true;
 232
 233                 const int delta = event->pos().y() - _mouse_down_point.y();
 234
 235                 for (auto i = _drag_row_items.begin();
 236                         i != _drag_row_items.end(); i++) {
 237                         const std::shared_ptr<RowItem> row_item((*i).first);
 238                         if (row_item) {
 239                                 const int y = (*i).second + delta;
 240                                 const int y_snap =
 241                                         ((y + View::SignalSnapGridSize / 2) /
 242                                                 View::SignalSnapGridSize) *
 243                                                 View::SignalSnapGridSize;
 244                                 row_item->set_v_offset(y_snap);
 245
 246                                 // Ensure the trace is selected
 247                                 row_item->select();
 248                         }
 249
 250                 }
 251
 252                 signals_moved();
 253         }
 254
 255         update();
 256 }
 257
 258 void Header::leaveEvent(QEvent*)
 259 {
 260         _mouse_point = QPoint(-1, -1);
 261         update();
 262 }
 263
 264 void Header::contextMenuEvent(QContextMenuEvent *event)
 265 {
 266         const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point);
 267
 268         if (r)
 269                 r->create_context_menu(this)->exec(event->globalPos());
 270 }
 271
 272 void Header::keyPressEvent(QKeyEvent *e)
 273 {
 274         assert(e);
 275
 276         switch (e->key())
 277         {
 278         case Qt::Key_Delete:
 279         {
 280                 const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 281                 for (const shared_ptr<RowItem> r : row_items)
 282                         if (r->selected())
 283                                 r->delete_pressed();
 284                 break;
 285         }
 286         }
 287 }
 288
 289 void Header::on_signals_changed()
 290 {
 291         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 292         for (shared_ptr<RowItem> r : row_items) {
 293                 assert(r);
 294                 connect(r.get(), SIGNAL(visibility_changed()),
 295                         this, SLOT(on_trace_changed()));
 296                 connect(r.get(), SIGNAL(text_changed()),
 297                         this, SLOT(on_trace_changed()));
 298                 connect(r.get(), SIGNAL(colour_changed()),
 299                         this, SLOT(update()));
 300         }
 301 }
 302
 303 void Header::on_signals_moved()
 304 {
 305         update();
 306 }
 307
 308 void Header::on_trace_changed()
 309 {
 310         update();
 311         geometry_updated();
 312 }
 313
 314 } // namespace view
 315 } // namespace pv