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 }
  66
  67 QSize Header::sizeHint() const
  68 {
  69         QRectF max_rect(-Padding, 0, Padding, 0);
  70         for (auto &i : view_)
  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         return vector< shared_ptr<ViewItem> >(view_.begin(), view_.end());
  84 }
  85
  86 shared_ptr<ViewItem> Header::get_mouse_over_item(const QPoint &pt)
  87 {
  88         const QRect r(0, 0, width() - BaselineOffset, height());
  89         for (auto &i : view_)
  90                 if (i->enabled() && i->label_rect(r).contains(pt))
  91                         return i;
  92         return shared_ptr<RowItem>();
  93 }
  94
  95 void Header::paintEvent(QPaintEvent*)
  96 {
  97         // The trace labels are not drawn with the arrows exactly on the
  98         // left edge of the widget, because then the selection shadow
  99         // would be clipped away.
 100         const QRect rect(0, 0, width() - BaselineOffset, height());
 101
 102         vector< shared_ptr<RowItem> > row_items(
 103                 view_.begin(), view_.end());
 104
 105         stable_sort(row_items.begin(), row_items.end(),
 106                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 107                         return a->visual_v_offset() < b->visual_v_offset(); });
 108
 109         QPainter painter(this);
 110         painter.setRenderHint(QPainter::Antialiasing);
 111
 112         for (const shared_ptr<RowItem> r : row_items)
 113         {
 114                 assert(r);
 115
 116                 const bool highlight = !item_dragging_ &&
 117                         r->label_rect(rect).contains(mouse_point_);
 118                 r->paint_label(painter, rect, highlight);
 119         }
 120
 121         painter.end();
 122 }
 123
 124 void Header::contextMenuEvent(QContextMenuEvent *event)
 125 {
 126         const shared_ptr<ViewItem> r = get_mouse_over_item(mouse_point_);
 127         if (!r)
 128                 return;
 129
 130         QMenu *menu = r->create_context_menu(this);
 131         if (!menu)
 132                 menu = new QMenu(this);
 133
 134         if (std::count_if(view_.begin(), view_.end(), item_selected) > 1)
 135         {
 136                 menu->addSeparator();
 137
 138                 QAction *const group = new QAction(tr("Group"), this);
 139                 QList<QKeySequence> shortcuts;
 140                 shortcuts.append(QKeySequence(Qt::ControlModifier | Qt::Key_G));
 141                 group->setShortcuts(shortcuts);
 142                 connect(group, SIGNAL(triggered()), this, SLOT(on_group()));
 143                 menu->addAction(group);
 144         }
 145
 146         menu->exec(event->globalPos());
 147 }
 148
 149 void Header::keyPressEvent(QKeyEvent *e)
 150 {
 151         assert(e);
 152
 153         MarginWidget::keyPressEvent(e);
 154
 155         if (e->key() == Qt::Key_G && e->modifiers() == Qt::ControlModifier)
 156                 on_group();
 157         else if (e->key() == Qt::Key_U && e->modifiers() == Qt::ControlModifier)
 158                 on_ungroup();
 159 }
 160
 161 void Header::on_group()
 162 {
 163         vector< shared_ptr<RowItem> > selected_items(
 164                 make_filter_iterator(item_selected, view_.begin(), view_.end()),
 165                 make_filter_iterator(item_selected, view_.end(), view_.end()));
 166         stable_sort(selected_items.begin(), selected_items.end(),
 167                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 168                         return a->visual_v_offset() < b->visual_v_offset(); });
 169
 170         shared_ptr<TraceGroup> group(new TraceGroup());
 171         shared_ptr<RowItem> mouse_down_item(
 172                 std::dynamic_pointer_cast<RowItem>(mouse_down_item_));
 173         shared_ptr<RowItem> focus_item(
 174                 mouse_down_item ? mouse_down_item : selected_items.front());
 175
 176         assert(focus_item);
 177         assert(focus_item->owner());
 178         focus_item->owner()->add_child_item(group);
 179
 180         // Set the group v_offset here before reparenting
 181         group->force_to_v_offset(focus_item->layout_v_offset() +
 182                 focus_item->v_extents().first);
 183
 184         for (size_t i = 0; i < selected_items.size(); i++) {
 185                 const shared_ptr<RowItem> &r = selected_items[i];
 186                 assert(r->owner());
 187                 r->owner()->remove_child_item(r);
 188                 group->add_child_item(r);
 189
 190                 // Put the items at 1-pixel offsets, so that restack will
 191                 // stack them in the right order
 192                 r->set_layout_v_offset(i);
 193         }
 194 }
 195
 196 void Header::on_ungroup()
 197 {
 198         bool restart;
 199         do {
 200                 restart = false;
 201                 for (const shared_ptr<RowItem> r : view_) {
 202                         const shared_ptr<TraceGroup> tg =
 203                                 dynamic_pointer_cast<TraceGroup>(r);
 204                         if (tg && tg->selected()) {
 205                                 tg->ungroup();
 206                                 restart = true;
 207                                 break;
 208                         }
 209                 }
 210         } while(restart);
 211 }
 212
 213 } // namespace view
 214 } // namespace pv