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.hpp"
  22 #include "view.hpp"
  23
  24 #include "signal.hpp"
  25 #include "tracegroup.hpp"
  26
  27 #include <cassert>
  28 #include <algorithm>
  29
  30 #include <boost/iterator/filter_iterator.hpp>
  31
  32 #include <QApplication>
  33 #include <QMenu>
  34 #include <QMouseEvent>
  35 #include <QPainter>
  36 #include <QRect>
  37
  38 #include <pv/session.hpp>
  39 #include <pv/widgets/popup.hpp>
  40
  41 using boost::make_filter_iterator;
  42 using std::dynamic_pointer_cast;
  43 using std::max;
  44 using std::make_pair;
  45 using std::min;
  46 using std::pair;
  47 using std::shared_ptr;
  48 using std::stable_sort;
  49 using std::vector;
  50
  51 namespace pv {
  52 namespace view {
  53
  54 const int Header::Padding = 12;
  55 const int Header::BaselineOffset = 5;
  56
  57 static bool item_selected(shared_ptr<RowItem> r)
  58 {
  59         return r->selected();
  60 }
  61
  62 Header::Header(View &parent) :
  63         MarginWidget(parent),
  64         dragging_(false)
  65 {
  66         setFocusPolicy(Qt::ClickFocus);
  67         setMouseTracking(true);
  68
  69         connect(&view_, SIGNAL(signals_moved()),
  70                 this, SLOT(on_signals_moved()));
  71 }
  72
  73 QSize Header::sizeHint() const
  74 {
  75         QRectF max_rect(-Padding, 0, Padding, 0);
  76         for (auto &i : view_)
  77                 if (i->enabled())
  78                         max_rect = max_rect.united(i->label_rect(QRect()));
  79         return QSize(max_rect.width() + Padding + BaselineOffset, 0);
  80 }
  81
  82 shared_ptr<RowItem> Header::get_mouse_over_row_item(const QPoint &pt)
  83 {
  84         const QRect r(BaselineOffset, 0, width() - BaselineOffset, height());
  85         for (auto &i : view_)
  86                 if (i->enabled() && i->label_rect(r).contains(pt))
  87                         return i;
  88         return shared_ptr<RowItem>();
  89 }
  90
  91 void Header::clear_selection()
  92 {
  93         for (auto &i : view_)
  94                 i->select(false);
  95         update();
  96 }
  97
  98 void Header::show_popup(const shared_ptr<RowItem> &item)
  99 {
 100         using pv::widgets::Popup;
 101
 102         Popup *const p = item->create_popup(&view_);
 103         if (!p)
 104                 return;
 105
 106         const QPoint pt(width() - BaselineOffset, item->get_visual_y());
 107         p->set_position(mapToGlobal(pt), Popup::Right);
 108         p->show();
 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 QRect rect(BaselineOffset, 0, width() - BaselineOffset, height());
 117
 118         vector< shared_ptr<RowItem> > row_items(
 119                 view_.begin(), view_.end());
 120
 121         stable_sort(row_items.begin(), row_items.end(),
 122                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 123                         return a->visual_v_offset() < b->visual_v_offset(); });
 124
 125         QPainter painter(this);
 126         painter.setRenderHint(QPainter::Antialiasing);
 127
 128         for (const shared_ptr<RowItem> r : row_items)
 129         {
 130                 assert(r);
 131
 132                 const bool highlight = !dragging_ &&
 133                         r->label_rect(rect).contains(mouse_point_);
 134                 r->paint_label(painter, rect, highlight);
 135         }
 136
 137         painter.end();
 138 }
 139
 140 void Header::mouseLeftPressEvent(QMouseEvent *event)
 141 {
 142         (void)event;
 143
 144         const bool ctrl_pressed =
 145                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 146
 147         // Clear selection if control is not pressed and this item is unselected
 148         if ((!mouse_down_item_ || !mouse_down_item_->selected()) &&
 149                 !ctrl_pressed)
 150                 for (shared_ptr<RowItem> r : view_)
 151                         r->select(false);
 152
 153         // Set the signal selection state if the item has been clicked
 154         if (mouse_down_item_) {
 155                 if (ctrl_pressed)
 156                         mouse_down_item_->select(!mouse_down_item_->selected());
 157                 else
 158                         mouse_down_item_->select(true);
 159         }
 160
 161         // Save the offsets of any signals which will be dragged
 162         for (const shared_ptr<RowItem> r : view_)
 163                 if (r->selected())
 164                         r->drag();
 165
 166         selection_changed();
 167         update();
 168 }
 169
 170 void Header::mousePressEvent(QMouseEvent *event)
 171 {
 172         assert(event);
 173
 174         mouse_down_point_ = event->pos();
 175         mouse_down_item_ = get_mouse_over_row_item(event->pos());
 176
 177         if (event->button() & Qt::LeftButton)
 178                 mouseLeftPressEvent(event);
 179 }
 180
 181 void Header::mouseLeftReleaseEvent(QMouseEvent *event)
 182 {
 183         assert(event);
 184
 185         const bool ctrl_pressed =
 186                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 187
 188         // Unselect everything if control is not pressed
 189         const shared_ptr<RowItem> mouse_over =
 190                 get_mouse_over_row_item(event->pos());
 191
 192         for (auto &r : view_)
 193                 r->drag_release();
 194
 195         if (dragging_)
 196                 view_.restack_all_row_items();
 197         else
 198         {
 199                 if (!ctrl_pressed) {
 200                         for (shared_ptr<RowItem> r : view_)
 201                                 if (mouse_down_item_ != r)
 202                                         r->select(false);
 203
 204                         if (mouse_down_item_)
 205                                 show_popup(mouse_down_item_);
 206                 }
 207         }
 208
 209         dragging_ = false;
 210 }
 211
 212 void Header::mouseReleaseEvent(QMouseEvent *event)
 213 {
 214         assert(event);
 215         if (event->button() & Qt::LeftButton)
 216                 mouseLeftReleaseEvent(event);
 217
 218         mouse_down_item_ = nullptr;
 219 }
 220
 221 void Header::mouseMoveEvent(QMouseEvent *event)
 222 {
 223         assert(event);
 224         mouse_point_ = event->pos();
 225
 226         if (!(event->buttons() & Qt::LeftButton))
 227                 return;
 228
 229         if ((event->pos() - mouse_down_point_).manhattanLength() <
 230                 QApplication::startDragDistance())
 231                 return;
 232
 233         // Check all the drag items share a common owner
 234         RowItemOwner *item_owner = nullptr;
 235         for (shared_ptr<RowItem> r : view_)
 236                 if (r->dragging()) {
 237                         if (!item_owner)
 238                                 item_owner = r->owner();
 239                         else if(item_owner != r->owner())
 240                                 return;
 241                 }
 242
 243         if (!item_owner)
 244                 return;
 245
 246         // Do the drag
 247         dragging_ = true;
 248
 249         const int delta = event->pos().y() - mouse_down_point_.y();
 250
 251         for (std::shared_ptr<RowItem> r : view_)
 252                 if (r->dragging()) {
 253                         r->force_to_v_offset(r->drag_point().y() + delta);
 254
 255                         // Ensure the trace is selected
 256                         r->select();
 257                 }
 258
 259         item_owner->restack_items();
 260         for (const auto &r : *item_owner)
 261                 r->animate_to_layout_v_offset();
 262         signals_moved();
 263
 264         update();
 265 }
 266
 267 void Header::leaveEvent(QEvent*)
 268 {
 269         mouse_point_ = QPoint(-1, -1);
 270         update();
 271 }
 272
 273 void Header::contextMenuEvent(QContextMenuEvent *event)
 274 {
 275         const shared_ptr<RowItem> r = get_mouse_over_row_item(mouse_point_);
 276         if (!r)
 277                 return;
 278
 279         QMenu *menu = r->create_context_menu(this);
 280         if (!menu)
 281                 menu = new QMenu(this);
 282
 283         if (std::count_if(view_.begin(), view_.end(), item_selected) > 1)
 284         {
 285                 menu->addSeparator();
 286
 287                 QAction *const group = new QAction(tr("Group"), this);
 288                 QList<QKeySequence> shortcuts;
 289                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 290                 group->setShortcuts(shortcuts);
 291                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 292                 menu->addAction(group);
 293         }
 294
 295         menu->exec(event->globalPos());
 296 }
 297
 298 void Header::keyPressEvent(QKeyEvent *e)
 299 {
 300         assert(e);
 301
 302         if (e->key() == Qt::Key_Delete)
 303         {
 304                 for (const shared_ptr<RowItem> r : view_)
 305                         if (r->selected())
 306                                 r->delete_pressed();
 307         }
 308         else if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier)
 309                 on_group();
 310         else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier)
 311                 on_ungroup();
 312 }
 313
 314 void Header::on_signals_moved()
 315 {
 316         update();
 317 }
 318
 319 void Header::on_group()
 320 {
 321         vector< shared_ptr<RowItem> > selected_items(
 322                 make_filter_iterator(item_selected, view_.begin(), view_.end()),
 323                 make_filter_iterator(item_selected, view_.end(), view_.end()));
 324         stable_sort(selected_items.begin(), selected_items.end(),
 325                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 326                         return a->visual_v_offset() < b->visual_v_offset(); });
 327
 328         shared_ptr<TraceGroup> group(new TraceGroup());
 329         shared_ptr<RowItem> focus_item(
 330                 mouse_down_item_ ? mouse_down_item_ : selected_items.front());
 331
 332         assert(focus_item);
 333         assert(focus_item->owner());
 334         focus_item->owner()->add_child_item(group);
 335
 336         // Set the group v_offset here before reparenting
 337         group->force_to_v_offset(focus_item->layout_v_offset() +
 338                 focus_item->v_extents().first);
 339
 340         for (size_t i = 0; i < selected_items.size(); i++) {
 341                 const shared_ptr<RowItem> &r = selected_items[i];
 342                 assert(r->owner());
 343                 r->owner()->remove_child_item(r);
 344                 group->add_child_item(r);
 345
 346                 // Put the items at 1-pixel offsets, so that restack will
 347                 // stack them in the right order
 348                 r->set_layout_v_offset(i);
 349         }
 350 }
 351
 352 void Header::on_ungroup()
 353 {
 354         bool restart;
 355         do {
 356                 restart = false;
 357                 for (const shared_ptr<RowItem> r : view_) {
 358                         const shared_ptr<TraceGroup> tg =
 359                                 dynamic_pointer_cast<TraceGroup>(r);
 360                         if (tg && tg->selected()) {
 361                                 tg->ungroup();
 362                                 restart = true;
 363                                 break;
 364                         }
 365                 }
 366         } while(restart);
 367 }
 368
 369 } // namespace view
 370 } // namespace pv