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.h"
  22 #include "view.h"
  23
  24 #include "signal.h"
  25 #include "../sigsession.h"
  26
  27 #include <cassert>
  28 #include <algorithm>
  29
  30 #include <QApplication>
  31 #include <QMenu>
  32 #include <QMouseEvent>
  33 #include <QPainter>
  34 #include <QRect>
  35
  36 #include <pv/widgets/popup.h>
  37
  38 using std::max;
  39 using std::make_pair;
  40 using std::pair;
  41 using std::shared_ptr;
  42 using std::stable_sort;
  43 using std::vector;
  44
  45 namespace pv {
  46 namespace view {
  47
  48 const int Header::Padding = 12;
  49 const int Header::BaselineOffset = 5;
  50
  51 Header::Header(View &parent) :
  52         MarginWidget(parent),
  53         _dragging(false)
  54 {
  55         setFocusPolicy(Qt::ClickFocus);
  56         setMouseTracking(true);
  57
  58         connect(&_view.session(), SIGNAL(signals_changed()),
  59                 this, SLOT(on_signals_changed()));
  60
  61         connect(&_view, SIGNAL(signals_moved()),
  62                 this, SLOT(on_signals_moved()));
  63 }
  64
  65 QSize Header::sizeHint() const
  66 {
  67         QRectF max_rect(-Padding, 0, Padding, 0);
  68         for (auto &i : _view)
  69                 if (i->enabled())
  70                         max_rect = max_rect.united(i->label_rect(0));
  71         return QSize(max_rect.width() + Padding + BaselineOffset, 0);
  72 }
  73
  74 shared_ptr<RowItem> Header::get_mouse_over_row_item(const QPoint &pt)
  75 {
  76         const int w = width() - BaselineOffset;
  77         for (auto &i : _view)
  78                 if (i->enabled() && i->label_rect(w).contains(pt))
  79                         return i;
  80         return shared_ptr<RowItem>();
  81 }
  82
  83 void Header::clear_selection()
  84 {
  85         for (auto &i : _view)
  86                 i->select(false);
  87         update();
  88 }
  89
  90 void Header::show_popup(const shared_ptr<RowItem> &item)
  91 {
  92         using pv::widgets::Popup;
  93
  94         Popup *const p = item->create_popup(&_view);
  95         if (!p)
  96                 return;
  97
  98         const QPoint pt(width() - BaselineOffset, item->get_y());
  99         p->set_position(mapToGlobal(pt), Popup::Right);
 100         p->show();
 101 }
 102
 103 void Header::paintEvent(QPaintEvent*)
 104 {
 105         // The trace labels are not drawn with the arrows exactly on the
 106         // left edge of the widget, because then the selection shadow
 107         // would be clipped away.
 108         const int w = width() - BaselineOffset;
 109
 110         vector< shared_ptr<RowItem> > row_items(
 111                 _view.begin(), _view.end());
 112
 113         stable_sort(row_items.begin(), row_items.end(),
 114                 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
 115                         return a->v_offset() < b->v_offset(); });
 116
 117         QPainter painter(this);
 118         painter.setRenderHint(QPainter::Antialiasing);
 119
 120         const bool dragging = !_drag_row_items.empty();
 121         for (const shared_ptr<RowItem> r : row_items)
 122         {
 123                 assert(r);
 124
 125                 const bool highlight = !dragging &&
 126                         r->label_rect(w).contains(_mouse_point);
 127                 r->paint_label(painter, w, highlight);
 128         }
 129
 130         painter.end();
 131 }
 132
 133 void Header::mousePressEvent(QMouseEvent *event)
 134 {
 135         assert(event);
 136
 137         if (event->button() & Qt::LeftButton) {
 138                 _mouse_down_point = event->pos();
 139
 140                 // Save the offsets of any signals which will be dragged
 141                 for (const shared_ptr<RowItem> r : _view)
 142                         if (r->selected())
 143                                 _drag_row_items.push_back(
 144                                         make_pair(r, r->v_offset()));
 145         }
 146
 147         // Select the signal if it has been clicked
 148         const shared_ptr<RowItem> mouse_over_row_item =
 149                 get_mouse_over_row_item(event->pos());
 150         if (mouse_over_row_item) {
 151                 if (mouse_over_row_item->selected())
 152                         mouse_over_row_item->select(false);
 153                 else {
 154                         mouse_over_row_item->select(true);
 155
 156                         if (~QApplication::keyboardModifiers() &
 157                                 Qt::ControlModifier)
 158                                 _drag_row_items.clear();
 159
 160                         // Add the signal to the drag list
 161                         if (event->button() & Qt::LeftButton)
 162                                 _drag_row_items.push_back(
 163                                         make_pair(mouse_over_row_item,
 164                                         mouse_over_row_item->v_offset()));
 165                 }
 166         }
 167
 168         if (~QApplication::keyboardModifiers() & Qt::ControlModifier) {
 169                 // Unselect all other signals because the Ctrl is not
 170                 // pressed
 171                 for (const shared_ptr<RowItem> r : _view)
 172                         if (r != mouse_over_row_item)
 173                                 r->select(false);
 174         }
 175
 176         selection_changed();
 177         update();
 178 }
 179
 180 void Header::mouseReleaseEvent(QMouseEvent *event)
 181 {
 182         assert(event);
 183         if (event->button() == Qt::LeftButton) {
 184                 if (_dragging)
 185                         _view.normalize_layout();
 186                 else
 187                 {
 188                         const shared_ptr<RowItem> mouse_over_row_item =
 189                                 get_mouse_over_row_item(event->pos());
 190                         if (mouse_over_row_item)
 191                                 show_popup(mouse_over_row_item);
 192                 }
 193
 194                 _dragging = false;
 195                 _drag_row_items.clear();
 196         }
 197 }
 198
 199 void Header::mouseMoveEvent(QMouseEvent *event)
 200 {
 201         assert(event);
 202         _mouse_point = event->pos();
 203
 204         if (!(event->buttons() & Qt::LeftButton))
 205                 return;
 206
 207         if ((event->pos() - _mouse_down_point).manhattanLength() <
 208                 QApplication::startDragDistance())
 209                 return;
 210
 211         // Move the signals if we are dragging
 212         if (!_drag_row_items.empty())
 213         {
 214                 _dragging = true;
 215
 216                 const int delta = event->pos().y() - _mouse_down_point.y();
 217
 218                 for (auto i = _drag_row_items.begin();
 219                         i != _drag_row_items.end(); i++) {
 220                         const std::shared_ptr<RowItem> row_item((*i).first);
 221                         if (row_item) {
 222                                 const int y = (*i).second + delta;
 223                                 const int y_snap =
 224                                         ((y + View::SignalSnapGridSize / 2) /
 225                                                 View::SignalSnapGridSize) *
 226                                                 View::SignalSnapGridSize;
 227                                 row_item->set_v_offset(y_snap);
 228
 229                                 // Ensure the trace is selected
 230                                 row_item->select();
 231                         }
 232
 233                 }
 234
 235                 signals_moved();
 236         }
 237
 238         update();
 239 }
 240
 241 void Header::leaveEvent(QEvent*)
 242 {
 243         _mouse_point = QPoint(-1, -1);
 244         update();
 245 }
 246
 247 void Header::contextMenuEvent(QContextMenuEvent *event)
 248 {
 249         const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point);
 250         if (!r)
 251                 return;
 252
 253         QMenu *const menu = r->create_context_menu(this);
 254         if (!menu)
 255                 return;
 256
 257         menu->exec(event->globalPos());
 258 }
 259
 260 void Header::keyPressEvent(QKeyEvent *e)
 261 {
 262         assert(e);
 263
 264         switch (e->key())
 265         {
 266         case Qt::Key_Delete:
 267         {
 268                 for (const shared_ptr<RowItem> r : _view)
 269                         if (r->selected())
 270                                 r->delete_pressed();
 271                 break;
 272         }
 273         }
 274 }
 275
 276 void Header::on_signals_changed()
 277 {
 278         for (shared_ptr<RowItem> r : _view) {
 279                 assert(r);
 280                 connect(r.get(), SIGNAL(visibility_changed()),
 281                         this, SLOT(on_trace_changed()));
 282                 connect(r.get(), SIGNAL(text_changed()),
 283                         this, SLOT(on_trace_changed()));
 284                 connect(r.get(), SIGNAL(colour_changed()),
 285                         this, SLOT(update()));
 286         }
 287 }
 288
 289 void Header::on_signals_moved()
 290 {
 291         update();
 292 }
 293
 294 void Header::on_trace_changed()
 295 {
 296         update();
 297         geometry_updated();
 298 }
 299
 300 } // namespace view
 301 } // namespace pv