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 shared_ptr<RowItem> Header::get_mouse_over_item(const QPoint &pt)
  84 {
  85         const QRect r(0, 0, width() - BaselineOffset, height());
  86         for (auto &i : view_)
  87                 if (i->enabled() && i->label_rect(r).contains(pt))
  88                         return i;
  89         return shared_ptr<RowItem>();
  90 }
  91
  92 void Header::clear_selection()
  93 {
  94         for (auto &i : view_)
  95                 i->select(false);
  96         update();
  97 }
  98
  99 void Header::show_popup(const shared_ptr<RowItem> &item)
 100 {
 101         using pv::widgets::Popup;
 102
 103         Popup *const p = item->create_popup(&view_);
 104         if (!p)
 105                 return;
 106
 107         const QPoint pt(width() - BaselineOffset, item->get_visual_y());
 108         p->set_position(mapToGlobal(pt), Popup::Right);
 109         p->show();
 110 }
 111
 112 void Header::paintEvent(QPaintEvent*)
 113 {
 114         // The trace labels are not drawn with the arrows exactly on the
 115         // left edge of the widget, because then the selection shadow
 116         // would be clipped away.
 117         const QRect rect(0, 0, width() - BaselineOffset, height());
 118
 119         vector< shared_ptr<RowItem> > row_items(
 120                 view_.begin(), view_.end());
 121
 122         stable_sort(row_items.begin(), row_items.end(),
 123                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 124                         return a->visual_v_offset() < b->visual_v_offset(); });
 125
 126         QPainter painter(this);
 127         painter.setRenderHint(QPainter::Antialiasing);
 128
 129         for (const shared_ptr<RowItem> r : row_items)
 130         {
 131                 assert(r);
 132
 133                 const bool highlight = !dragging_ &&
 134                         r->label_rect(rect).contains(mouse_point_);
 135                 r->paint_label(painter, rect, highlight);
 136         }
 137
 138         painter.end();
 139 }
 140
 141 void Header::mouseLeftPressEvent(QMouseEvent *event)
 142 {
 143         (void)event;
 144
 145         const bool ctrl_pressed =
 146                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 147
 148         // Clear selection if control is not pressed and this item is unselected
 149         if ((!mouse_down_item_ || !mouse_down_item_->selected()) &&
 150                 !ctrl_pressed)
 151                 for (shared_ptr<RowItem> r : view_)
 152                         r->select(false);
 153
 154         // Set the signal selection state if the item has been clicked
 155         if (mouse_down_item_) {
 156                 if (ctrl_pressed)
 157                         mouse_down_item_->select(!mouse_down_item_->selected());
 158                 else
 159                         mouse_down_item_->select(true);
 160         }
 161
 162         // Save the offsets of any signals which will be dragged
 163         for (const shared_ptr<RowItem> r : view_)
 164                 if (r->selected())
 165                         r->drag();
 166
 167         selection_changed();
 168         update();
 169 }
 170
 171 void Header::mousePressEvent(QMouseEvent *event)
 172 {
 173         assert(event);
 174
 175         mouse_down_point_ = event->pos();
 176         mouse_down_item_ = get_mouse_over_item(event->pos());
 177
 178         if (event->button() & Qt::LeftButton)
 179                 mouseLeftPressEvent(event);
 180 }
 181
 182 void Header::mouseLeftReleaseEvent(QMouseEvent *event)
 183 {
 184         assert(event);
 185
 186         const bool ctrl_pressed =
 187                 QApplication::keyboardModifiers() & Qt::ControlModifier;
 188
 189         // Unselect everything if control is not pressed
 190         const shared_ptr<RowItem> mouse_over =
 191                 get_mouse_over_item(event->pos());
 192
 193         for (auto &r : view_)
 194                 r->drag_release();
 195
 196         if (dragging_)
 197                 view_.restack_all_row_items();
 198         else
 199         {
 200                 if (!ctrl_pressed) {
 201                         for (shared_ptr<RowItem> r : view_)
 202                                 if (mouse_down_item_ != r)
 203                                         r->select(false);
 204
 205                         if (mouse_down_item_)
 206                                 show_popup(mouse_down_item_);
 207                 }
 208         }
 209
 210         dragging_ = false;
 211 }
 212
 213 void Header::mouseReleaseEvent(QMouseEvent *event)
 214 {
 215         assert(event);
 216         if (event->button() & Qt::LeftButton)
 217                 mouseLeftReleaseEvent(event);
 218
 219         mouse_down_item_ = nullptr;
 220 }
 221
 222 void Header::mouseMoveEvent(QMouseEvent *event)
 223 {
 224         assert(event);
 225         mouse_point_ = event->pos();
 226
 227         if (!(event->buttons() & Qt::LeftButton))
 228                 return;
 229
 230         if ((event->pos() - mouse_down_point_).manhattanLength() <
 231                 QApplication::startDragDistance())
 232                 return;
 233
 234         // Check all the drag items share a common owner
 235         RowItemOwner *item_owner = nullptr;
 236         for (shared_ptr<RowItem> r : view_)
 237                 if (r->dragging()) {
 238                         if (!item_owner)
 239                                 item_owner = r->owner();
 240                         else if(item_owner != r->owner())
 241                                 return;
 242                 }
 243
 244         if (!item_owner)
 245                 return;
 246
 247         // Do the drag
 248         dragging_ = true;
 249
 250         const QPoint delta = event->pos() - mouse_down_point_;
 251
 252         for (std::shared_ptr<RowItem> r : view_)
 253                 if (r->dragging()) {
 254                         r->drag_by(delta);
 255
 256                         // Ensure the trace is selected
 257                         r->select();
 258                 }
 259
 260         item_owner->restack_items();
 261         for (const auto &r : *item_owner)
 262                 r->animate_to_layout_v_offset();
 263         signals_moved();
 264
 265         update();
 266 }
 267
 268 void Header::leaveEvent(QEvent*)
 269 {
 270         mouse_point_ = QPoint(-1, -1);
 271         update();
 272 }
 273
 274 void Header::contextMenuEvent(QContextMenuEvent *event)
 275 {
 276         const shared_ptr<RowItem> r = get_mouse_over_item(mouse_point_);
 277         if (!r)
 278                 return;
 279
 280         QMenu *menu = r->create_context_menu(this);
 281         if (!menu)
 282                 menu = new QMenu(this);
 283
 284         if (std::count_if(view_.begin(), view_.end(), item_selected) > 1)
 285         {
 286                 menu->addSeparator();
 287
 288                 QAction *const group = new QAction(tr("Group"), this);
 289                 QList<QKeySequence> shortcuts;
 290                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 291                 group->setShortcuts(shortcuts);
 292                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 293                 menu->addAction(group);
 294         }
 295
 296         menu->exec(event->globalPos());
 297 }
 298
 299 void Header::keyPressEvent(QKeyEvent *e)
 300 {
 301         assert(e);
 302
 303         if (e->key() == Qt::Key_Delete)
 304         {
 305                 for (const shared_ptr<RowItem> r : view_)
 306                         if (r->selected())
 307                                 r->delete_pressed();
 308         }
 309         else if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier)
 310                 on_group();
 311         else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier)
 312                 on_ungroup();
 313 }
 314
 315 void Header::on_signals_moved()
 316 {
 317         update();
 318 }
 319
 320 void Header::on_group()
 321 {
 322         vector< shared_ptr<RowItem> > selected_items(
 323                 make_filter_iterator(item_selected, view_.begin(), view_.end()),
 324                 make_filter_iterator(item_selected, view_.end(), view_.end()));
 325         stable_sort(selected_items.begin(), selected_items.end(),
 326                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 327                         return a->visual_v_offset() < b->visual_v_offset(); });
 328
 329         shared_ptr<TraceGroup> group(new TraceGroup());
 330         shared_ptr<RowItem> focus_item(
 331                 mouse_down_item_ ? mouse_down_item_ : selected_items.front());
 332
 333         assert(focus_item);
 334         assert(focus_item->owner());
 335         focus_item->owner()->add_child_item(group);
 336
 337         // Set the group v_offset here before reparenting
 338         group->force_to_v_offset(focus_item->layout_v_offset() +
 339                 focus_item->v_extents().first);
 340
 341         for (size_t i = 0; i < selected_items.size(); i++) {
 342                 const shared_ptr<RowItem> &r = selected_items[i];
 343                 assert(r->owner());
 344                 r->owner()->remove_child_item(r);
 345                 group->add_child_item(r);
 346
 347                 // Put the items at 1-pixel offsets, so that restack will
 348                 // stack them in the right order
 349                 r->set_layout_v_offset(i);
 350         }
 351 }
 352
 353 void Header::on_ungroup()
 354 {
 355         bool restart;
 356         do {
 357                 restart = false;
 358                 for (const shared_ptr<RowItem> r : view_) {
 359                         const shared_ptr<TraceGroup> tg =
 360                                 dynamic_pointer_cast<TraceGroup>(r);
 361                         if (tg && tg->selected()) {
 362                                 tg->ungroup();
 363                                 restart = true;
 364                                 break;
 365                         }
 366                 }
 367         } while(restart);
 368 }
 369
 370 } // namespace view
 371 } // namespace pv