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