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::drag_items(const QPoint &delta)
  98 {
  99         RowItemOwner *item_owner = nullptr;
 100         for (std::shared_ptr<RowItem> r : view_)
 101                 if (r->dragging()) {
 102                         item_owner = r->owner();
 103                         r->drag_by(delta);
 104
 105                         // Ensure the trace is selected
 106                         r->select();
 107                 }
 108
 109         item_owner->restack_items();
 110         for (const auto &r : *item_owner)
 111                 r->animate_to_layout_v_offset();
 112         signals_moved();
 113 }
 114
 115 void Header::paintEvent(QPaintEvent*)
 116 {
 117         // The trace labels are not drawn with the arrows exactly on the
 118         // left edge of the widget, because then the selection shadow
 119         // would be clipped away.
 120         const QRect rect(0, 0, width() - BaselineOffset, height());
 121
 122         vector< shared_ptr<RowItem> > row_items(
 123                 view_.begin(), view_.end());
 124
 125         stable_sort(row_items.begin(), row_items.end(),
 126                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 127                         return a->visual_v_offset() < b->visual_v_offset(); });
 128
 129         QPainter painter(this);
 130         painter.setRenderHint(QPainter::Antialiasing);
 131
 132         for (const shared_ptr<RowItem> r : row_items)
 133         {
 134                 assert(r);
 135
 136                 const bool highlight = !dragging_ &&
 137                         r->label_rect(rect).contains(mouse_point_);
 138                 r->paint_label(painter, rect, highlight);
 139         }
 140
 141         painter.end();
 142 }
 143
 144 void Header::contextMenuEvent(QContextMenuEvent *event)
 145 {
 146         const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
 147         if (!r)
 148                 return;
 149
 150         QMenu *menu = r->create_context_menu(this);
 151         if (!menu)
 152                 menu = new QMenu(this);
 153
 154         if (std::count_if(view_.begin(), view_.end(), item_selected) > 1)
 155         {
 156                 menu->addSeparator();
 157
 158                 QAction *const group = new QAction(tr("Group"), this);
 159                 QList<QKeySequence> shortcuts;
 160                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 161                 group->setShortcuts(shortcuts);
 162                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 163                 menu->addAction(group);
 164         }
 165
 166         menu->exec(event->globalPos());
 167 }
 168
 169 void Header::keyPressEvent(QKeyEvent *e)
 170 {
 171         assert(e);
 172
 173         MarginWidget::keyPressEvent(e);
 174
 175         if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier)
 176                 on_group();
 177         else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier)
 178                 on_ungroup();
 179 }
 180
 181 void Header::on_signals_moved()
 182 {
 183         update();
 184 }
 185
 186 void Header::on_group()
 187 {
 188         vector< shared_ptr<RowItem> > selected_items(
 189                 make_filter_iterator(item_selected, view_.begin(), view_.end()),
 190                 make_filter_iterator(item_selected, view_.end(), view_.end()));
 191         stable_sort(selected_items.begin(), selected_items.end(),
 192                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 193                         return a->visual_v_offset() < b->visual_v_offset(); });
 194
 195         shared_ptr<TraceGroup> group(new TraceGroup());
 196         shared_ptr<RowItem> mouse_down_item(
 197                 std::dynamic_pointer_cast<RowItem>(mouse_down_item_));
 198         shared_ptr<RowItem> focus_item(
 199                 mouse_down_item ? mouse_down_item : selected_items.front());
 200
 201         assert(focus_item);
 202         assert(focus_item->owner());
 203         focus_item->owner()->add_child_item(group);
 204
 205         // Set the group v_offset here before reparenting
 206         group->force_to_v_offset(focus_item->layout_v_offset() +
 207                 focus_item->v_extents().first);
 208
 209         for (size_t i = 0; i < selected_items.size(); i++) {
 210                 const shared_ptr<RowItem> &r = selected_items[i];
 211                 assert(r->owner());
 212                 r->owner()->remove_child_item(r);
 213                 group->add_child_item(r);
 214
 215                 // Put the items at 1-pixel offsets, so that restack will
 216                 // stack them in the right order
 217                 r->set_layout_v_offset(i);
 218         }
 219 }
 220
 221 void Header::on_ungroup()
 222 {
 223         bool restart;
 224         do {
 225                 restart = false;
 226                 for (const shared_ptr<RowItem> r : view_) {
 227                         const shared_ptr<TraceGroup> tg =
 228                                 dynamic_pointer_cast<TraceGroup>(r);
 229                         if (tg && tg->selected()) {
 230                                 tg->ungroup();
 231                                 restart = true;
 232                                 break;
 233                         }
 234                 }
 235         } while(restart);
 236 }
 237
 238 } // namespace view
 239 } // namespace pv