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::show_popup(const shared_ptr<RowItem> &item)
 112 {
 113         using pv::widgets::Popup;
 114
 115         Popup *const p = item->create_popup(&_view);
 116         if (!p)
 117                 return;
 118
 119         const QPoint pt(width() - BaselineOffset, item->get_y());
 120         p->set_position(mapToGlobal(pt), Popup::Right);
 121         p->show();
 122 }
 123
 124 void Header::paintEvent(QPaintEvent*)
 125 {
 126         // The trace labels are not drawn with the arrows exactly on the
 127         // left edge of the widget, because then the selection shadow
 128         // would be clipped away.
 129         const int w = width() - BaselineOffset;
 130
 131         vector< shared_ptr<RowItem> > row_items(_view.child_items());
 132         stable_sort(row_items.begin(), row_items.end(),
 133                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 134                         return a->v_offset() < b->v_offset(); });
 135
 136         QPainter painter(this);
 137         painter.setRenderHint(QPainter::Antialiasing);
 138
 139         const bool dragging = !_drag_row_items.empty();
 140         for (const shared_ptr<RowItem> r : row_items)
 141         {
 142                 assert(r);
 143
 144                 const bool highlight = !dragging &&
 145                         r->label_rect(w).contains(_mouse_point);
 146                 r->paint_label(painter, w, highlight);
 147         }
 148
 149         painter.end();
 150 }
 151
 152 void Header::mousePressEvent(QMouseEvent *event)
 153 {
 154         assert(event);
 155
 156         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 157
 158         if (event->button() & Qt::LeftButton) {
 159                 _mouse_down_point = event->pos();
 160
 161                 // Save the offsets of any signals which will be dragged
 162                 for (const shared_ptr<RowItem> r : row_items)
 163                         if (r->selected())
 164                                 _drag_row_items.push_back(
 165                                         make_pair(r, r->v_offset()));
 166         }
 167
 168         // Select the signal if it has been clicked
 169         const shared_ptr<RowItem> mouse_over_row_item =
 170                 get_mouse_over_row_item(event->pos());
 171         if (mouse_over_row_item) {
 172                 if (mouse_over_row_item->selected())
 173                         mouse_over_row_item->select(false);
 174                 else {
 175                         mouse_over_row_item->select(true);
 176
 177                         if (~QApplication::keyboardModifiers() &
 178                                 Qt::ControlModifier)
 179                                 _drag_row_items.clear();
 180
 181                         // Add the signal to the drag list
 182                         if (event->button() & Qt::LeftButton)
 183                                 _drag_row_items.push_back(
 184                                         make_pair(mouse_over_row_item,
 185                                         mouse_over_row_item->v_offset()));
 186                 }
 187         }
 188
 189         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 190                 // Unselect all other signals because the Ctrl is not
 191                 // pressed
 192                 for (const shared_ptr<RowItem> r : row_items)
 193                         if (r != mouse_over_row_item)
 194                                 r->select(false);
 195         }
 196
 197         selection_changed();
 198         update();
 199 }
 200
 201 void Header::mouseReleaseEvent(QMouseEvent *event)
 202 {
 203         assert(event);
 204         if (event->button() == Qt::LeftButton) {
 205                 if (_dragging)
 206                         _view.normalize_layout();
 207                 else
 208                 {
 209                         const shared_ptr<RowItem> mouse_over_row_item =
 210                                 get_mouse_over_row_item(event->pos());
 211                         if (mouse_over_row_item)
 212                                 show_popup(mouse_over_row_item);
 213                 }
 214
 215                 _dragging = false;
 216                 _drag_row_items.clear();
 217         }
 218 }
 219
 220 void Header::mouseMoveEvent(QMouseEvent *event)
 221 {
 222         assert(event);
 223         _mouse_point = event->pos();
 224
 225         if (!(event->buttons() & Qt::LeftButton))
 226                 return;
 227
 228         if ((event->pos() - _mouse_down_point).manhattanLength() <
 229                 QApplication::startDragDistance())
 230                 return;
 231
 232         // Move the signals if we are dragging
 233         if (!_drag_row_items.empty())
 234         {
 235                 _dragging = true;
 236
 237                 const int delta = event->pos().y() - _mouse_down_point.y();
 238
 239                 for (auto i = _drag_row_items.begin();
 240                         i != _drag_row_items.end(); i++) {
 241                         const std::shared_ptr<RowItem> row_item((*i).first);
 242                         if (row_item) {
 243                                 const int y = (*i).second + delta;
 244                                 const int y_snap =
 245                                         ((y + View::SignalSnapGridSize / 2) /
 246                                                 View::SignalSnapGridSize) *
 247                                                 View::SignalSnapGridSize;
 248                                 row_item->set_v_offset(y_snap);
 249
 250                                 // Ensure the trace is selected
 251                                 row_item->select();
 252                         }
 253
 254                 }
 255
 256                 signals_moved();
 257         }
 258
 259         update();
 260 }
 261
 262 void Header::leaveEvent(QEvent*)
 263 {
 264         _mouse_point = QPoint(-1, -1);
 265         update();
 266 }
 267
 268 void Header::contextMenuEvent(QContextMenuEvent *event)
 269 {
 270         const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point);
 271         if (!r)
 272                 return;
 273
 274         QMenu *const menu = r->create_context_menu(this);
 275         if (!menu)
 276                 return;
 277
 278         menu->exec(event->globalPos());
 279 }
 280
 281 void Header::keyPressEvent(QKeyEvent *e)
 282 {
 283         assert(e);
 284
 285         switch (e->key())
 286         {
 287         case Qt::Key_Delete:
 288         {
 289                 const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 290                 for (const shared_ptr<RowItem> r : row_items)
 291                         if (r->selected())
 292                                 r->delete_pressed();
 293                 break;
 294         }
 295         }
 296 }
 297
 298 void Header::on_signals_changed()
 299 {
 300         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 301         for (shared_ptr<RowItem> r : row_items) {
 302                 assert(r);
 303                 connect(r.get(), SIGNAL(visibility_changed()),
 304                         this, SLOT(on_trace_changed()));
 305                 connect(r.get(), SIGNAL(text_changed()),
 306                         this, SLOT(on_trace_changed()));
 307                 connect(r.get(), SIGNAL(colour_changed()),
 308                         this, SLOT(update()));
 309         }
 310 }
 311
 312 void Header::on_signals_moved()
 313 {
 314         update();
 315 }
 316
 317 void Header::on_trace_changed()
 318 {
 319         update();
 320         geometry_updated();
 321 }
 322
 323 } // namespace view
 324 } // namespace pv