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 <assert.h>
  28
  29 #include <QApplication>
  30 #include <QMenu>
  31 #include <QMouseEvent>
  32 #include <QPainter>
  33 #include <QRect>
  34
  35 #include <pv/widgets/popup.h>
  36
  37 using std::max;
  38 using std::make_pair;
  39 using std::pair;
  40 using std::shared_ptr;
  41 using std::vector;
  42
  43 namespace pv {
  44 namespace view {
  45
  46 const int Header::Padding = 12;
  47 const int Header::BaselineOffset = 5;
  48
  49 Header::Header(View &parent) :
  50         MarginWidget(parent),
  51         _dragging(false)
  52 {
  53         setFocusPolicy(Qt::ClickFocus);
  54         setMouseTracking(true);
  55
  56         connect(&_view.session(), SIGNAL(signals_changed()),
  57                 this, SLOT(on_signals_changed()));
  58
  59         connect(&_view, SIGNAL(signals_moved()),
  60                 this, SLOT(on_signals_moved()));
  61
  62         // Trigger the initial event manually. The default device has signals
  63         // which were created before this object came into being
  64         on_signals_changed();
  65 }
  66
  67 QSize Header::sizeHint() const
  68 {
  69         int max_width = 0;
  70
  71         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
  72         for (shared_ptr<RowItem> r : row_items) {
  73                 assert(r);
  74
  75                 if (r->enabled()) {
  76                         max_width = max(max_width, (int)r->label_rect(0).width());
  77                 }
  78         }
  79
  80         return QSize(max_width + Padding + BaselineOffset, 0);
  81 }
  82
  83 shared_ptr<RowItem> Header::get_mouse_over_row_item(const QPoint &pt)
  84 {
  85         const int w = width() - BaselineOffset;
  86         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
  87
  88         for (const shared_ptr<RowItem> r : row_items)
  89         {
  90                 assert(r);
  91                 if (r->enabled() && r->label_rect(w).contains(pt))
  92                         return r;
  93         }
  94
  95         return shared_ptr<RowItem>();
  96 }
  97
  98 void Header::clear_selection()
  99 {
 100         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 101         for (const shared_ptr<RowItem> r : row_items) {
 102                 assert(r);
 103                 r->select(false);
 104         }
 105
 106         update();
 107 }
 108
 109 void Header::paintEvent(QPaintEvent*)
 110 {
 111         // The trace labels are not drawn with the arrows exactly on the
 112         // left edge of the widget, because then the selection shadow
 113         // would be clipped away.
 114         const int w = width() - BaselineOffset;
 115         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 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         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 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 : row_items)
 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 : row_items)
 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         using pv::widgets::Popup;
 185
 186         assert(event);
 187         if (event->button() == Qt::LeftButton) {
 188                 if (_dragging)
 189                         _view.normalize_layout();
 190                 else
 191                 {
 192                         const shared_ptr<RowItem> mouse_over_row_item =
 193                                 get_mouse_over_row_item(event->pos());
 194                         if (mouse_over_row_item) {
 195                                 const int w = width() - BaselineOffset;
 196                                 Popup *const p =
 197                                         mouse_over_row_item->create_popup(&_view);
 198                                 p->set_position(mapToGlobal(QPoint(w,
 199                                         mouse_over_row_item->get_y())),
 200                                         Popup::Right);
 201                                 p->show();
 202                         }
 203                 }
 204
 205                 _dragging = false;
 206                 _drag_row_items.clear();
 207         }
 208 }
 209
 210 void Header::mouseMoveEvent(QMouseEvent *event)
 211 {
 212         assert(event);
 213         _mouse_point = event->pos();
 214
 215         if (!(event->buttons() & Qt::LeftButton))
 216                 return;
 217
 218         if ((event->pos() - _mouse_down_point).manhattanLength() <
 219                 QApplication::startDragDistance())
 220                 return;
 221
 222         // Move the signals if we are dragging
 223         if (!_drag_row_items.empty())
 224         {
 225                 _dragging = true;
 226
 227                 const int delta = event->pos().y() - _mouse_down_point.y();
 228
 229                 for (auto i = _drag_row_items.begin();
 230                         i != _drag_row_items.end(); i++) {
 231                         const std::shared_ptr<RowItem> row_item((*i).first);
 232                         if (row_item) {
 233                                 const int y = (*i).second + delta;
 234                                 const int y_snap =
 235                                         ((y + View::SignalSnapGridSize / 2) /
 236                                                 View::SignalSnapGridSize) *
 237                                                 View::SignalSnapGridSize;
 238                                 row_item->set_v_offset(y_snap);
 239
 240                                 // Ensure the trace is selected
 241                                 row_item->select();
 242                         }
 243
 244                 }
 245
 246                 signals_moved();
 247         }
 248
 249         update();
 250 }
 251
 252 void Header::leaveEvent(QEvent*)
 253 {
 254         _mouse_point = QPoint(-1, -1);
 255         update();
 256 }
 257
 258 void Header::contextMenuEvent(QContextMenuEvent *event)
 259 {
 260         const shared_ptr<RowItem> r = get_mouse_over_row_item(_mouse_point);
 261
 262         if (r)
 263                 r->create_context_menu(this)->exec(event->globalPos());
 264 }
 265
 266 void Header::keyPressEvent(QKeyEvent *e)
 267 {
 268         assert(e);
 269
 270         switch (e->key())
 271         {
 272         case Qt::Key_Delete:
 273         {
 274                 const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 275                 for (const shared_ptr<RowItem> r : row_items)
 276                         if (r->selected())
 277                                 r->delete_pressed();
 278                 break;
 279         }
 280         }
 281 }
 282
 283 void Header::on_signals_changed()
 284 {
 285         const vector< shared_ptr<RowItem> > row_items(_view.child_items());
 286         for (shared_ptr<RowItem> r : row_items) {
 287                 assert(r);
 288                 connect(r.get(), SIGNAL(visibility_changed()),
 289                         this, SLOT(on_trace_changed()));
 290                 connect(r.get(), SIGNAL(text_changed()),
 291                         this, SLOT(on_trace_changed()));
 292                 connect(r.get(), SIGNAL(colour_changed()),
 293                         this, SLOT(update()));
 294         }
 295 }
 296
 297 void Header::on_signals_moved()
 298 {
 299         update();
 300 }
 301
 302 void Header::on_trace_changed()
 303 {
 304         update();
 305         geometry_updated();
 306 }
 307
 308 } // namespace view
 309 } // namespace pv