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 "tracegroup.h"
  26 #include "../sigsession.h"
  27
  28 #include <cassert>
  29 #include <algorithm>
  30
  31 #include <boost/iterator/filter_iterator.hpp>
  32
  33 #include <QApplication>
  34 #include <QMenu>
  35 #include <QMouseEvent>
  36 #include <QPainter>
  37 #include <QRect>
  38
  39 #include <pv/widgets/popup.h>
  40
  41 using boost::make_filter_iterator;
  42 using std::max;
  43 using std::make_pair;
  44 using std::min;
  45 using std::pair;
  46 using std::shared_ptr;
  47 using std::stable_sort;
  48 using std::vector;
  49
  50 namespace pv {
  51 namespace view {
  52
  53 const int Header::Padding = 12;
  54 const int Header::BaselineOffset = 5;
  55
  56 static bool item_selected(shared_ptr<RowItem> r)
  57 {
  58         return r->selected();
  59 }
  60
  61 Header::Header(View &parent) :
  62         MarginWidget(parent),
  63         _dragging(false)
  64 {
  65         setFocusPolicy(Qt::ClickFocus);
  66         setMouseTracking(true);
  67
  68         connect(&_view, SIGNAL(signals_moved()),
  69                 this, SLOT(on_signals_moved()));
  70 }
  71
  72 QSize Header::sizeHint() const
  73 {
  74         QRectF max_rect(-Padding, 0, Padding, 0);
  75         for (auto &i : _view)
  76                 if (i->enabled())
  77                         max_rect = max_rect.united(i->label_rect(0));
  78         return QSize(max_rect.width() + Padding + BaselineOffset, 0);
  79 }
  80
  81 shared_ptr<RowItem> Header::get_mouse_over_row_item(const QPoint &pt)
  82 {
  83         const int w = width() - BaselineOffset;
  84         for (auto &i : _view)
  85                 if (i->enabled() && i->label_rect(w).contains(pt))
  86                         return i;
  87         return shared_ptr<RowItem>();
  88 }
  89
  90 void Header::clear_selection()
  91 {
  92         for (auto &i : _view)
  93                 i->select(false);
  94         update();
  95 }
  96
  97 void Header::show_popup(const shared_ptr<RowItem> &item)
  98 {
  99         using pv::widgets::Popup;
 100
 101         Popup *const p = item->create_popup(&_view);
 102         if (!p)
 103                 return;
 104
 105         const QPoint pt(width() - BaselineOffset, item->get_visual_y());
 106         p->set_position(mapToGlobal(pt), Popup::Right);
 107         p->show();
 108 }
 109
 110 void Header::paintEvent(QPaintEvent*)
 111 {
 112         // The trace labels are not drawn with the arrows exactly on the
 113         // left edge of the widget, because then the selection shadow
 114         // would be clipped away.
 115         const int w = width() - BaselineOffset;
 116
 117         vector< shared_ptr<RowItem> > row_items(
 118                 _view.begin(), _view.end());
 119
 120         stable_sort(row_items.begin(), row_items.end(),
 121                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 122                         return a->visual_v_offset() < b->visual_v_offset(); });
 123
 124         QPainter painter(this);
 125         painter.setRenderHint(QPainter::Antialiasing);
 126
 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::mouseLeftPressEvent(QMouseEvent *event)
 140 {
 141         (void)event;
 142
 143         const bool ctrl_pressed =
 144                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 145
 146         // Clear selection if control is not pressed and this item is unselected
 147         if ((!_mouse_down_item || !_mouse_down_item->selected()) &&
 148                 !ctrl_pressed)
 149                 for (shared_ptr<RowItem> r : _view)
 150                         r->select(false);
 151
 152         // Set the signal selection state if the item has been clicked
 153         if (_mouse_down_item) {
 154                 if (ctrl_pressed)
 155                         _mouse_down_item->select(!_mouse_down_item->selected());
 156                 else
 157                         _mouse_down_item->select(true);
 158         }
 159
 160         // Save the offsets of any signals which will be dragged
 161         for (const shared_ptr<RowItem> r : _view)
 162                 if (r->selected())
 163                         r->drag();
 164
 165         selection_changed();
 166         update();
 167 }
 168
 169 void Header::mousePressEvent(QMouseEvent *event)
 170 {
 171         assert(event);
 172
 173         _mouse_down_point = event->pos();
 174         _mouse_down_item = get_mouse_over_row_item(event->pos());
 175
 176         if (event->button() & Qt::LeftButton)
 177                 mouseLeftPressEvent(event);
 178 }
 179
 180 void Header::mouseLeftReleaseEvent(QMouseEvent *event)
 181 {
 182         assert(event);
 183
 184         const bool ctrl_pressed =
 185                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 186
 187         // Unselect everything if control is not pressed
 188         const shared_ptr<RowItem> mouse_over =
 189                 get_mouse_over_row_item(event->pos());
 190
 191         for (auto &r : _view)
 192                 r->drag_release();
 193
 194         if (_dragging)
 195                 _view.restack_all_row_items();
 196         else
 197         {
 198                 if (!ctrl_pressed) {
 199                         for (shared_ptr<RowItem> r : _view)
 200                                 if (_mouse_down_item != r)
 201                                         r->select(false);
 202
 203                         if (_mouse_down_item)
 204                                 show_popup(_mouse_down_item);
 205                 }
 206         }
 207
 208         _dragging = false;
 209 }
 210
 211 void Header::mouseReleaseEvent(QMouseEvent *event)
 212 {
 213         assert(event);
 214         if (event->button() & Qt::LeftButton)
 215                 mouseLeftReleaseEvent(event);
 216
 217         _mouse_down_item = nullptr;
 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         // Check all the drag items share a common owner
 233         RowItemOwner *item_owner = nullptr;
 234         for (shared_ptr<RowItem> r : _view)
 235                 if (r->dragging()) {
 236                         if (!item_owner)
 237                                 item_owner = r->owner();
 238                         else if(item_owner != r->owner())
 239                                 return;
 240                 }
 241
 242         if (!item_owner)
 243                 return;
 244
 245         // Do the drag
 246         _dragging = true;
 247
 248         const int delta = event->pos().y() - _mouse_down_point.y();
 249
 250         for (std::shared_ptr<RowItem> r : _view)
 251                 if (r->dragging()) {
 252                         r->force_to_v_offset(r->drag_point().y() + delta);
 253
 254                         // Ensure the trace is selected
 255                         r->select();
 256                 }
 257
 258         item_owner->restack_items();
 259         for (const auto &r : *item_owner)
 260                 r->animate_to_layout_v_offset();
 261         signals_moved();
 262
 263         update();
 264 }
 265
 266 void Header::leaveEvent(QEvent*)
 267 {
 268         _mouse_point = QPoint(-1, -1);
 269         update();
 270 }
 271
 272 void Header::contextMenuEvent(QContextMenuEvent *event)
 273 {
 274         const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point);
 275         if (!r)
 276                 return;
 277
 278         QMenu *menu = r->create_context_menu(this);
 279         if (!menu)
 280                 menu = new QMenu(this);
 281
 282         if (std::count_if(_view.begin(), _view.end(), item_selected) > 1)
 283         {
 284                 menu->addSeparator();
 285
 286                 QAction *const group = new QAction(tr("Group"), this);
 287                 QList<QKeySequence> shortcuts;
 288                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 289                 group->setShortcuts(shortcuts);
 290                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 291                 menu->addAction(group);
 292         }
 293
 294         menu->exec(event->globalPos());
 295 }
 296
 297 void Header::keyPressEvent(QKeyEvent *e)
 298 {
 299         assert(e);
 300
 301         switch (e->key())
 302         {
 303         case Qt::Key_Delete:
 304         {
 305                 for (const shared_ptr<RowItem> r : _view)
 306                         if (r->selected())
 307                                 r->delete_pressed();
 308                 break;
 309         }
 310         }
 311 }
 312
 313 void Header::on_signals_moved()
 314 {
 315         update();
 316 }
 317
 318 void Header::on_group()
 319 {
 320         vector< shared_ptr<RowItem> > selected_items(
 321                 make_filter_iterator(item_selected, _view.begin(), _view.end()),
 322                 make_filter_iterator(item_selected, _view.end(), _view.end()));
 323         stable_sort(selected_items.begin(), selected_items.end(),
 324                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 325                         return a->visual_v_offset() < b->visual_v_offset(); });
 326
 327         shared_ptr<TraceGroup> group(new TraceGroup());
 328         shared_ptr<RowItem> focus_item(
 329                 _mouse_down_item ? _mouse_down_item : selected_items.front());
 330
 331         assert(focus_item);
 332         assert(focus_item->owner());
 333         focus_item->owner()->add_child_item(group);
 334
 335         // Set the group v_offset here before reparenting
 336         group->force_to_v_offset(focus_item->layout_v_offset() +
 337                 focus_item->v_extents().first);
 338
 339         for (size_t i = 0; i < selected_items.size(); i++) {
 340                 const shared_ptr<RowItem> &r = selected_items[i];
 341                 assert(r->owner());
 342                 r->owner()->remove_child_item(r);
 343                 group->add_child_item(r);
 344
 345                 // Put the items at 1-pixel offsets, so that restack will
 346                 // stack them in the right order
 347                 r->set_layout_v_offset(i);
 348         }
 349 }
 350
 351 } // namespace view
 352 } // namespace pv