pv/views/trace/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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "header.hpp"
  21 #include "view.hpp"
  22
  23 #include "signal.hpp"
  24 #include "tracegroup.hpp"
  25
  26 #include <algorithm>
  27 #include <cassert>
  28
  29 #include <boost/iterator/filter_iterator.hpp>
  30
  31 #include <QApplication>
  32 #include <QMenu>
  33 #include <QMouseEvent>
  34 #include <QPainter>
  35 #include <QRect>
  36
  37 #include <pv/session.hpp>
  38 #include <pv/widgets/popup.hpp>
  39
  40 using boost::make_filter_iterator;
  41
  42 using std::count_if;
  43 using std::dynamic_pointer_cast;
  44 using std::shared_ptr;
  45 using std::stable_sort;
  46 using std::vector;
  47
  48 namespace pv {
  49 namespace views {
  50 namespace trace {
  51
  52 const int Header::Padding = 12;
  53
  54 static bool item_selected(shared_ptr<TraceTreeItem> r)
  55 {
  56         return r->selected();
  57 }
  58
  59 Header::Header(View &parent) :
  60         MarginWidget(parent)
  61 {
  62 }
  63
  64 QSize Header::sizeHint() const
  65 {
  66         QRectF max_rect(-Padding, 0, Padding, 0);
  67         const vector<shared_ptr<TraceTreeItem>> items(
  68                 view_.list_by_type<TraceTreeItem>());
  69         for (auto &i : items)
  70                 if (i->enabled())
  71                         max_rect = max_rect.united(i->label_rect(QRect()));
  72         return QSize(max_rect.width() + Padding, 0);
  73 }
  74
  75 QSize Header::extended_size_hint() const
  76 {
  77         return sizeHint() + QSize(ViewItem::HighlightRadius, 0);
  78 }
  79
  80 vector< shared_ptr<ViewItem> > Header::items()
  81 {
  82         const vector<shared_ptr<TraceTreeItem>> items(
  83                 view_.list_by_type<TraceTreeItem>());
  84         return vector< shared_ptr<ViewItem> >(items.begin(), items.end());
  85 }
  86
  87 shared_ptr<ViewItem> Header::get_mouse_over_item(const QPoint &pt)
  88 {
  89         const QRect r(0, 0, width(), height());
  90         const vector<shared_ptr<TraceTreeItem>> items(
  91                 view_.list_by_type<TraceTreeItem>());
  92         for (auto i = items.rbegin(); i != items.rend(); i++)
  93                 if ((*i)->enabled() && (*i)->label_rect(r).contains(pt))
  94                         return *i;
  95         return shared_ptr<TraceTreeItem>();
  96 }
  97
  98 void Header::paintEvent(QPaintEvent*)
  99 {
 100         const QRect rect(0, 0, width(), height());
 101
 102         vector< shared_ptr<RowItem> > items(view_.list_by_type<RowItem>());
 103
 104         stable_sort(items.begin(), items.end(),
 105                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 106                         return a->drag_point(QRect()).y() < b->drag_point(QRect()).y(); });
 107
 108         QPainter painter(this);
 109         painter.setRenderHint(QPainter::Antialiasing);
 110
 111         for (const shared_ptr<RowItem> r : items) {
 112                 assert(r);
 113
 114                 const bool highlight = !item_dragging_ &&
 115                         r->label_rect(rect).contains(mouse_point_);
 116                 r->paint_label(painter, rect, highlight);
 117         }
 118
 119         painter.end();
 120 }
 121
 122 void Header::contextMenuEvent(QContextMenuEvent *event)
 123 {
 124         const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
 125         if (!r)
 126                 return;
 127
 128         QMenu *menu = r->create_context_menu(this);
 129         if (!menu)
 130                 menu = new QMenu(this);
 131
 132         const vector< shared_ptr<TraceTreeItem> > items(
 133                 view_.list_by_type<TraceTreeItem>());
 134         if (count_if(items.begin(), items.end(), item_selected) > 1) {
 135                 menu->addSeparator();
 136
 137                 QAction *const group = new QAction(tr("Group"), this);
 138                 QList<QKeySequence> shortcuts;
 139                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 140                 group->setShortcuts(shortcuts);
 141                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 142                 menu->addAction(group);
 143         }
 144
 145         menu->exec(event->globalPos());
 146 }
 147
 148 void Header::keyPressEvent(QKeyEvent *event)
 149 {
 150         assert(event);
 151
 152         MarginWidget::keyPressEvent(event);
 153
 154         if (event->key() == Qt::Key_G && event->modifiers() == Qt::ControlModifier)
 155                 on_group();
 156         else if (event->key() == Qt::Key_U && event->modifiers() == Qt::ControlModifier)
 157                 on_ungroup();
 158 }
 159
 160 void Header::on_group()
 161 {
 162         const vector< shared_ptr<TraceTreeItem> > items(
 163                 view_.list_by_type<TraceTreeItem>());
 164         vector< shared_ptr<TraceTreeItem> > selected_items(
 165                 make_filter_iterator(item_selected, items.begin(), items.end()),
 166                 make_filter_iterator(item_selected, items.end(), items.end()));
 167         stable_sort(selected_items.begin(), selected_items.end(),
 168                 [](const shared_ptr<TraceTreeItem> &a, const shared_ptr<TraceTreeItem> &b) {
 169                         return a->visual_v_offset() < b->visual_v_offset(); });
 170
 171         shared_ptr<TraceGroup> group(new TraceGroup());
 172         shared_ptr<TraceTreeItem> mouse_down_item(
 173                 dynamic_pointer_cast<TraceTreeItem>(mouse_down_item_));
 174         shared_ptr<TraceTreeItem> focus_item(
 175                 mouse_down_item ? mouse_down_item : selected_items.front());
 176
 177         assert(focus_item);
 178         assert(focus_item->owner());
 179         focus_item->owner()->add_child_item(group);
 180
 181         // Set the group v_offset here before reparenting
 182         group->force_to_v_offset(focus_item->layout_v_offset() +
 183                 focus_item->v_extents().first);
 184
 185         for (size_t i = 0; i < selected_items.size(); i++) {
 186                 const shared_ptr<TraceTreeItem> &r = selected_items[i];
 187                 assert(r->owner());
 188                 r->owner()->remove_child_item(r);
 189                 group->add_child_item(r);
 190
 191                 // Put the items at 1-pixel offsets, so that restack will
 192                 // stack them in the right order
 193                 r->set_layout_v_offset(i);
 194         }
 195 }
 196
 197 void Header::on_ungroup()
 198 {
 199         bool restart;
 200         do {
 201                 restart = false;
 202                 const vector< shared_ptr<TraceGroup> > groups(
 203                         view_.list_by_type<TraceGroup>());
 204                 for (const shared_ptr<TraceGroup> tg : groups)
 205                         if (tg->selected()) {
 206                                 tg->ungroup();
 207                                 restart = true;
 208                                 break;
 209                         }
 210         } while (restart);
 211 }
 212
 213 } // namespace trace
 214 } // namespace views
 215 } // namespace pv