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 {
  65         connect(&view_, SIGNAL(signals_moved()),
  66                 this, SLOT(on_signals_moved()));
  67 }
  68
  69 QSize Header::sizeHint() const
  70 {
  71         QRectF max_rect(-Padding, 0, Padding, 0);
  72         for (auto &i : view_)
  73                 if (i->enabled())
  74                         max_rect = max_rect.united(i->label_rect(QRect()));
  75         return QSize(max_rect.width() + Padding + BaselineOffset, 0);
  76 }
  77
  78 QSize Header::extended_size_hint() const
  79 {
  80         return sizeHint() + QSize(ViewItem::HighlightRadius, 0);
  81 }
  82
  83 vector< shared_ptr<ViewItem> > Header::items()
  84 {
  85         return vector< shared_ptr<ViewItem> >(view_.begin(), view_.end());
  86 }
  87
  88 shared_ptr<ViewItem> Header::get_mouse_over_item(const QPoint &pt)
  89 {
  90         const QRect r(0, 0, width() - BaselineOffset, height());
  91         for (auto &i : view_)
  92                 if (i->enabled() && i->label_rect(r).contains(pt))
  93                         return i;
  94         return shared_ptr<RowItem>();
  95 }
  96
  97 void Header::clear_selection()
  98 {
  99         for (auto &i : view_)
 100                 i->select(false);
 101         update();
 102 }
 103
 104 void Header::paintEvent(QPaintEvent*)
 105 {
 106         // The trace labels are not drawn with the arrows exactly on the
 107         // left edge of the widget, because then the selection shadow
 108         // would be clipped away.
 109         const QRect rect(0, 0, width() - BaselineOffset, height());
 110
 111         vector< shared_ptr<RowItem> > row_items(
 112                 view_.begin(), view_.end());
 113
 114         stable_sort(row_items.begin(), row_items.end(),
 115                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 116                         return a->visual_v_offset() < b->visual_v_offset(); });
 117
 118         QPainter painter(this);
 119         painter.setRenderHint(QPainter::Antialiasing);
 120
 121         for (const shared_ptr<RowItem> r : row_items)
 122         {
 123                 assert(r);
 124
 125                 const bool highlight = !dragging_ &&
 126                         r->label_rect(rect).contains(mouse_point_);
 127                 r->paint_label(painter, rect, highlight);
 128         }
 129
 130         painter.end();
 131 }
 132
 133 void Header::mouseLeftPressEvent(QMouseEvent *event)
 134 {
 135         (void)event;
 136
 137         const bool ctrl_pressed =
 138                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 139
 140         // Clear selection if control is not pressed and this item is unselected
 141         if ((!mouse_down_item_ || !mouse_down_item_->selected()) &&
 142                 !ctrl_pressed)
 143                 for (shared_ptr<RowItem> r : view_)
 144                         r->select(false);
 145
 146         // Set the signal selection state if the item has been clicked
 147         if (mouse_down_item_) {
 148                 if (ctrl_pressed)
 149                         mouse_down_item_->select(!mouse_down_item_->selected());
 150                 else
 151                         mouse_down_item_->select(true);
 152         }
 153
 154         // Save the offsets of any signals which will be dragged
 155         for (const shared_ptr<RowItem> r : view_)
 156                 if (r->selected())
 157                         r->drag();
 158
 159         selection_changed();
 160         update();
 161 }
 162
 163 void Header::mousePressEvent(QMouseEvent *event)
 164 {
 165         assert(event);
 166
 167         mouse_down_point_ = event->pos();
 168         mouse_down_item_ = get_mouse_over_item(event->pos());
 169
 170         if (event->button() & Qt::LeftButton)
 171                 mouseLeftPressEvent(event);
 172 }
 173
 174 void Header::mouseLeftReleaseEvent(QMouseEvent *event)
 175 {
 176         assert(event);
 177
 178         const bool ctrl_pressed =
 179                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 180
 181         // Unselect everything if control is not pressed
 182         const shared_ptr<ViewItem> mouse_over =
 183                 get_mouse_over_item(event->pos());
 184
 185         for (auto &r : view_)
 186                 r->drag_release();
 187
 188         if (dragging_)
 189                 view_.restack_all_row_items();
 190         else
 191         {
 192                 if (!ctrl_pressed) {
 193                         for (shared_ptr<RowItem> r : view_)
 194                                 if (mouse_down_item_ != r)
 195                                         r->select(false);
 196
 197                         if (mouse_down_item_)
 198                                 show_popup(mouse_down_item_);
 199                 }
 200         }
 201
 202         dragging_ = false;
 203 }
 204
 205 void Header::mouseReleaseEvent(QMouseEvent *event)
 206 {
 207         assert(event);
 208         if (event->button() & Qt::LeftButton)
 209                 mouseLeftReleaseEvent(event);
 210
 211         mouse_down_item_ = nullptr;
 212 }
 213
 214 void Header::mouseMoveEvent(QMouseEvent *event)
 215 {
 216         assert(event);
 217         mouse_point_ = event->pos();
 218
 219         if (!(event->buttons() & Qt::LeftButton))
 220                 return;
 221
 222         if ((event->pos() - mouse_down_point_).manhattanLength() <
 223                 QApplication::startDragDistance())
 224                 return;
 225
 226         // Check all the drag items share a common owner
 227         RowItemOwner *item_owner = nullptr;
 228         for (shared_ptr<RowItem> r : view_)
 229                 if (r->dragging()) {
 230                         if (!item_owner)
 231                                 item_owner = r->owner();
 232                         else if(item_owner != r->owner())
 233                                 return;
 234                 }
 235
 236         if (!item_owner)
 237                 return;
 238
 239         // Do the drag
 240         dragging_ = true;
 241
 242         const QPoint delta = event->pos() - mouse_down_point_;
 243
 244         for (std::shared_ptr<RowItem> r : view_)
 245                 if (r->dragging()) {
 246                         r->drag_by(delta);
 247
 248                         // Ensure the trace is selected
 249                         r->select();
 250                 }
 251
 252         item_owner->restack_items();
 253         for (const auto &r : *item_owner)
 254                 r->animate_to_layout_v_offset();
 255         signals_moved();
 256
 257         update();
 258 }
 259
 260 void Header::contextMenuEvent(QContextMenuEvent *event)
 261 {
 262         const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
 263         if (!r)
 264                 return;
 265
 266         QMenu *menu = r->create_context_menu(this);
 267         if (!menu)
 268                 menu = new QMenu(this);
 269
 270         if (std::count_if(view_.begin(), view_.end(), item_selected) > 1)
 271         {
 272                 menu->addSeparator();
 273
 274                 QAction *const group = new QAction(tr("Group"), this);
 275                 QList<QKeySequence> shortcuts;
 276                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 277                 group->setShortcuts(shortcuts);
 278                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 279                 menu->addAction(group);
 280         }
 281
 282         menu->exec(event->globalPos());
 283 }
 284
 285 void Header::keyPressEvent(QKeyEvent *e)
 286 {
 287         assert(e);
 288
 289         if (e->key() == Qt::Key_Delete)
 290         {
 291                 for (const shared_ptr<RowItem> r : view_)
 292                         if (r->selected())
 293                                 r->delete_pressed();
 294         }
 295         else if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier)
 296                 on_group();
 297         else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier)
 298                 on_ungroup();
 299 }
 300
 301 void Header::on_signals_moved()
 302 {
 303         update();
 304 }
 305
 306 void Header::on_group()
 307 {
 308         vector< shared_ptr<RowItem> > selected_items(
 309                 make_filter_iterator(item_selected, view_.begin(), view_.end()),
 310                 make_filter_iterator(item_selected, view_.end(), view_.end()));
 311         stable_sort(selected_items.begin(), selected_items.end(),
 312                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 313                         return a->visual_v_offset() < b->visual_v_offset(); });
 314
 315         shared_ptr<TraceGroup> group(new TraceGroup());
 316         shared_ptr<RowItem> mouse_down_item(
 317                 std::dynamic_pointer_cast<RowItem>(mouse_down_item_));
 318         shared_ptr<RowItem> focus_item(
 319                 mouse_down_item ? mouse_down_item : selected_items.front());
 320
 321         assert(focus_item);
 322         assert(focus_item->owner());
 323         focus_item->owner()->add_child_item(group);
 324
 325         // Set the group v_offset here before reparenting
 326         group->force_to_v_offset(focus_item->layout_v_offset() +
 327                 focus_item->v_extents().first);
 328
 329         for (size_t i = 0; i < selected_items.size(); i++) {
 330                 const shared_ptr<RowItem> &r = selected_items[i];
 331                 assert(r->owner());
 332                 r->owner()->remove_child_item(r);
 333                 group->add_child_item(r);
 334
 335                 // Put the items at 1-pixel offsets, so that restack will
 336                 // stack them in the right order
 337                 r->set_layout_v_offset(i);
 338         }
 339 }
 340
 341 void Header::on_ungroup()
 342 {
 343         bool restart;
 344         do {
 345                 restart = false;
 346                 for (const shared_ptr<RowItem> r : view_) {
 347                         const shared_ptr<TraceGroup> tg =
 348                                 dynamic_pointer_cast<TraceGroup>(r);
 349                         if (tg && tg->selected()) {
 350                                 tg->ungroup();
 351                                 restart = true;
 352                                 break;
 353                         }
 354                 }
 355         } while(restart);
 356 }
 357
 358 } // namespace view
 359 } // namespace pv