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, 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 TraceView {
  51
  52 const int Header::Padding = 12;
  53 const int Header::BaselineOffset = 5;
  54
  55 static bool item_selected(shared_ptr<TraceTreeItem> r)
  56 {
  57         return r->selected();
  58 }
  59
  60 Header::Header(View &parent) :
  61         MarginWidget(parent)
  62 {
  63 }
  64
  65 QSize Header::sizeHint() const
  66 {
  67         QRectF max_rect(-Padding, 0, Padding, 0);
  68         const vector<shared_ptr<TraceTreeItem>> items(
  69                 view_.list_by_type<TraceTreeItem>());
  70         for (auto &i : items)
  71                 if (i->enabled())
  72                         max_rect = max_rect.united(i->label_rect(QRect()));
  73         return QSize(max_rect.width() + Padding + BaselineOffset, 0);
  74 }
  75
  76 QSize Header::extended_size_hint() const
  77 {
  78         return sizeHint() + QSize(ViewItem::HighlightRadius, 0);
  79 }
  80
  81 vector< shared_ptr<ViewItem> > Header::items()
  82 {
  83         const vector<shared_ptr<TraceTreeItem>> items(
  84                 view_.list_by_type<TraceTreeItem>());
  85         return vector< shared_ptr<ViewItem> >(items.begin(), items.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         const vector<shared_ptr<TraceTreeItem>> items(
  92                 view_.list_by_type<TraceTreeItem>());
  93         for (auto i = items.rbegin(); i != items.rend(); i++)
  94                 if ((*i)->enabled() && (*i)->label_rect(r).contains(pt))
  95                         return *i;
  96         return shared_ptr<TraceTreeItem>();
  97 }
  98
  99 void Header::paintEvent(QPaintEvent*)
 100 {
 101         // The trace labels are not drawn with the arrows exactly on the
 102         // left edge of the widget, because then the selection shadow
 103         // would be clipped away.
 104         const QRect rect(0, 0, width() - BaselineOffset, height());
 105
 106         vector< shared_ptr<RowItem> > items(view_.list_by_type<RowItem>());
 107
 108         stable_sort(items.begin(), items.end(),
 109                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 110                         return a->point(QRect()).y() < b->point(QRect()).y(); });
 111
 112         QPainter painter(this);
 113         painter.setRenderHint(QPainter::Antialiasing);
 114
 115         for (const shared_ptr<RowItem> r : items) {
 116                 assert(r);
 117
 118                 const bool highlight = !item_dragging_ &&
 119                         r->label_rect(rect).contains(mouse_point_);
 120                 r->paint_label(painter, rect, highlight);
 121         }
 122
 123         painter.end();
 124 }
 125
 126 void Header::contextMenuEvent(QContextMenuEvent *event)
 127 {
 128         const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
 129         if (!r)
 130                 return;
 131
 132         QMenu *menu = r->create_context_menu(this);
 133         if (!menu)
 134                 menu = new QMenu(this);
 135
 136         const vector< shared_ptr<TraceTreeItem> > items(
 137                 view_.list_by_type<TraceTreeItem>());
 138         if (count_if(items.begin(), items.end(), item_selected) > 1) {
 139                 menu->addSeparator();
 140
 141                 QAction *const group = new QAction(tr("Group"), this);
 142                 QList<QKeySequence> shortcuts;
 143                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 144                 group->setShortcuts(shortcuts);
 145                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 146                 menu->addAction(group);
 147         }
 148
 149         menu->exec(event->globalPos());
 150 }
 151
 152 void Header::keyPressEvent(QKeyEvent *event)
 153 {
 154         assert(event);
 155
 156         MarginWidget::keyPressEvent(event);
 157
 158         if (event->key() == Qt::Key_G && event->modifiers() == Qt::ControlModifier)
 159                 on_group();
 160         else if (event->key() == Qt::Key_U && event->modifiers() == Qt::ControlModifier)
 161                 on_ungroup();
 162 }
 163
 164 void Header::on_group()
 165 {
 166         const vector< shared_ptr<TraceTreeItem> > items(
 167                 view_.list_by_type<TraceTreeItem>());
 168         vector< shared_ptr<TraceTreeItem> > selected_items(
 169                 make_filter_iterator(item_selected, items.begin(), items.end()),
 170                 make_filter_iterator(item_selected, items.end(), items.end()));
 171         stable_sort(selected_items.begin(), selected_items.end(),
 172                 [](const shared_ptr<TraceTreeItem> &a, const shared_ptr<TraceTreeItem> &b) {
 173                         return a->visual_v_offset() < b->visual_v_offset(); });
 174
 175         shared_ptr<TraceGroup> group(new TraceGroup());
 176         shared_ptr<TraceTreeItem> mouse_down_item(
 177                 dynamic_pointer_cast<TraceTreeItem>(mouse_down_item_));
 178         shared_ptr<TraceTreeItem> focus_item(
 179                 mouse_down_item ? mouse_down_item : selected_items.front());
 180
 181         assert(focus_item);
 182         assert(focus_item->owner());
 183         focus_item->owner()->add_child_item(group);
 184
 185         // Set the group v_offset here before reparenting
 186         group->force_to_v_offset(focus_item->layout_v_offset() +
 187                 focus_item->v_extents().first);
 188
 189         for (size_t i = 0; i < selected_items.size(); i++) {
 190                 const shared_ptr<TraceTreeItem> &r = selected_items[i];
 191                 assert(r->owner());
 192                 r->owner()->remove_child_item(r);
 193                 group->add_child_item(r);
 194
 195                 // Put the items at 1-pixel offsets, so that restack will
 196                 // stack them in the right order
 197                 r->set_layout_v_offset(i);
 198         }
 199 }
 200
 201 void Header::on_ungroup()
 202 {
 203         bool restart;
 204         do {
 205                 restart = false;
 206                 const vector< shared_ptr<TraceGroup> > groups(
 207                         view_.list_by_type<TraceGroup>());
 208                 for (const shared_ptr<TraceGroup> tg : groups)
 209                         if (tg->selected()) {
 210                                 tg->ungroup();
 211                                 restart = true;
 212                                 break;
 213                         }
 214         } while (restart);
 215 }
 216
 217 } // namespace TraceView
 218 } // namespace views
 219 } // namespace pv