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<TraceTreeItem> r)
  58 {
  59         return r->selected();
  60 }
  61
  62 Header::Header(View &parent) :
  63         MarginWidget(parent)
  64 {
  65 }
  66
  67 QSize Header::sizeHint() const
  68 {
  69         QRectF max_rect(-Padding, 0, Padding, 0);
  70         const vector<shared_ptr<TraceTreeItem>> items(
  71                 view_.list_by_type<TraceTreeItem>());
  72         for (auto &i : items)
  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         const vector<shared_ptr<TraceTreeItem>> items(
  86                 view_.list_by_type<TraceTreeItem>());
  87         return vector< shared_ptr<ViewItem> >(items.begin(), items.end());
  88 }
  89
  90 shared_ptr<ViewItem> Header::get_mouse_over_item(const QPoint &pt)
  91 {
  92         const QRect r(0, 0, width() - BaselineOffset, height());
  93         const vector<shared_ptr<TraceTreeItem>> items(
  94                 view_.list_by_type<TraceTreeItem>());
  95         for (auto &i : items)
  96                 if (i->enabled() && i->label_rect(r).contains(pt))
  97                         return i;
  98         return shared_ptr<TraceTreeItem>();
  99 }
 100
 101 void Header::paintEvent(QPaintEvent*)
 102 {
 103         // The trace labels are not drawn with the arrows exactly on the
 104         // left edge of the widget, because then the selection shadow
 105         // would be clipped away.
 106         const QRect rect(0, 0, width() - BaselineOffset, height());
 107
 108         vector< shared_ptr<TraceTreeItem> > items(
 109                 view_.list_by_type<TraceTreeItem>());
 110
 111         stable_sort(items.begin(), items.end(),
 112                 [](const shared_ptr<TraceTreeItem> &a, const shared_ptr<TraceTreeItem> &b) {
 113                         return a->visual_v_offset() < b->visual_v_offset(); });
 114
 115         QPainter painter(this);
 116         painter.setRenderHint(QPainter::Antialiasing);
 117
 118         for (const shared_ptr<TraceTreeItem> r : items)
 119         {
 120                 assert(r);
 121
 122                 const bool highlight = !item_dragging_ &&
 123                         r->label_rect(rect).contains(mouse_point_);
 124                 r->paint_label(painter, rect, highlight);
 125         }
 126
 127         painter.end();
 128 }
 129
 130 void Header::contextMenuEvent(QContextMenuEvent *event)
 131 {
 132         const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
 133         if (!r)
 134                 return;
 135
 136         QMenu *menu = r->create_context_menu(this);
 137         if (!menu)
 138                 menu = new QMenu(this);
 139
 140         const vector< shared_ptr<TraceTreeItem> > items(
 141                 view_.list_by_type<TraceTreeItem>());
 142         if (std::count_if(items.begin(), items.end(), item_selected) > 1)
 143         {
 144                 menu->addSeparator();
 145
 146                 QAction *const group = new QAction(tr("Group"), this);
 147                 QList<QKeySequence> shortcuts;
 148                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 149                 group->setShortcuts(shortcuts);
 150                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 151                 menu->addAction(group);
 152         }
 153
 154         menu->exec(event->globalPos());
 155 }
 156
 157 void Header::keyPressEvent(QKeyEvent *e)
 158 {
 159         assert(e);
 160
 161         MarginWidget::keyPressEvent(e);
 162
 163         if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier)
 164                 on_group();
 165         else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier)
 166                 on_ungroup();
 167 }
 168
 169 void Header::on_group()
 170 {
 171         const vector< shared_ptr<TraceTreeItem> > items(
 172                 view_.list_by_type<TraceTreeItem>());
 173         vector< shared_ptr<TraceTreeItem> > selected_items(
 174                 make_filter_iterator(item_selected, items.begin(), items.end()),
 175                 make_filter_iterator(item_selected, items.end(), items.end()));
 176         stable_sort(selected_items.begin(), selected_items.end(),
 177                 [](const shared_ptr<TraceTreeItem> &a, const shared_ptr<TraceTreeItem> &b) {
 178                         return a->visual_v_offset() < b->visual_v_offset(); });
 179
 180         shared_ptr<TraceGroup> group(new TraceGroup());
 181         shared_ptr<TraceTreeItem> mouse_down_item(
 182                 std::dynamic_pointer_cast<TraceTreeItem>(mouse_down_item_));
 183         shared_ptr<TraceTreeItem> focus_item(
 184                 mouse_down_item ? mouse_down_item : selected_items.front());
 185
 186         assert(focus_item);
 187         assert(focus_item->owner());
 188         focus_item->owner()->add_child_item(group);
 189
 190         // Set the group v_offset here before reparenting
 191         group->force_to_v_offset(focus_item->layout_v_offset() +
 192                 focus_item->v_extents().first);
 193
 194         for (size_t i = 0; i < selected_items.size(); i++) {
 195                 const shared_ptr<TraceTreeItem> &r = selected_items[i];
 196                 assert(r->owner());
 197                 r->owner()->remove_child_item(r);
 198                 group->add_child_item(r);
 199
 200                 // Put the items at 1-pixel offsets, so that restack will
 201                 // stack them in the right order
 202                 r->set_layout_v_offset(i);
 203         }
 204 }
 205
 206 void Header::on_ungroup()
 207 {
 208         bool restart;
 209         do {
 210                 restart = false;
 211                 const vector< shared_ptr<TraceGroup> > groups(
 212                         view_.list_by_type<TraceGroup>());
 213                 for (const shared_ptr<TraceGroup> tg : groups)
 214                         if (tg->selected()) {
 215                                 tg->ungroup();
 216                                 restart = true;
 217                                 break;
 218                         }
 219         } while (restart);
 220 }
 221
 222 } // namespace view
 223 } // namespace pv