pv/view/trace.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2013 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 <extdef.h>
  22
  23 #include <assert.h>
  24 #include <math.h>
  25
  26 #include <QApplication>
  27 #include <QFormLayout>
  28 #include <QKeyEvent>
  29 #include <QLineEdit>
  30
  31 #include "trace.h"
  32 #include "tracepalette.h"
  33 #include "view.h"
  34
  35 #include <pv/widgets/colourbutton.h>
  36 #include <pv/widgets/popup.h>
  37
  38 namespace pv {
  39 namespace view {
  40
  41 const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
  42 const int Trace::LabelHitPadding = 2;
  43
  44 Trace::Trace(QString name) :
  45         _view(NULL),
  46         _name(name),
  47         _v_offset(0),
  48         _popup(NULL),
  49         _popup_form(NULL)
  50 {
  51 }
  52
  53 QString Trace::get_name() const
  54 {
  55         return _name;
  56 }
  57
  58 void Trace::set_name(QString name)
  59 {
  60         _name = name;
  61 }
  62
  63 QColor Trace::get_colour() const
  64 {
  65         return _colour;
  66 }
  67
  68 void Trace::set_colour(QColor colour)
  69 {
  70         _colour = colour;
  71 }
  72
  73 int Trace::get_v_offset() const
  74 {
  75         return _v_offset;
  76 }
  77
  78 void Trace::set_v_offset(int v_offset)
  79 {
  80         _v_offset = v_offset;
  81 }
  82
  83 void Trace::set_view(pv::view::View *view)
  84 {
  85         assert(view);
  86
  87         if (_view)
  88                 disconnect(_view, SIGNAL(hover_point_changed()),
  89                         this, SLOT(on_hover_point_changed()));
  90
  91         _view = view;
  92
  93         connect(view, SIGNAL(hover_point_changed()),
  94                 this, SLOT(on_hover_point_changed()));
  95 }
  96
  97 void Trace::paint_back(QPainter &p, int left, int right)
  98 {
  99         (void)p;
 100         (void)left;
 101         (void)right;
 102 }
 103
 104 void Trace::paint_mid(QPainter &p, int left, int right)
 105 {
 106         (void)p;
 107         (void)left;
 108         (void)right;
 109 }
 110
 111 void Trace::paint_fore(QPainter &p, int left, int right)
 112 {
 113         (void)p;
 114         (void)left;
 115         (void)right;
 116 }
 117
 118 void Trace::paint_label(QPainter &p, int right, bool hover)
 119 {
 120         assert(_view);
 121         const int y = _v_offset - _view->v_offset();
 122
 123         p.setBrush(_colour);
 124
 125         if (!enabled())
 126                 return;
 127
 128         const QColor colour = get_colour();
 129
 130         const QRectF label_rect = get_label_rect(right);
 131
 132         // Paint the label
 133         const QPointF points[] = {
 134                 label_rect.topLeft(),
 135                 label_rect.topRight(),
 136                 QPointF(right, y),
 137                 label_rect.bottomRight(),
 138                 label_rect.bottomLeft()
 139         };
 140
 141         const QPointF highlight_points[] = {
 142                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
 143                 QPointF(label_rect.right(), label_rect.top() + 1),
 144                 QPointF(right - 1, y),
 145                 QPointF(label_rect.right(), label_rect.bottom() - 1),
 146                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
 147         };
 148
 149         if (selected()) {
 150                 p.setPen(highlight_pen());
 151                 p.setBrush(Qt::transparent);
 152                 p.drawPolygon(points, countof(points));
 153         }
 154
 155         p.setPen(Qt::transparent);
 156         p.setBrush(hover ? colour.lighter() : colour);
 157         p.drawPolygon(points, countof(points));
 158
 159         p.setPen(colour.lighter());
 160         p.setBrush(Qt::transparent);
 161         p.drawPolygon(highlight_points, countof(highlight_points));
 162
 163         p.setPen(colour.darker());
 164         p.setBrush(Qt::transparent);
 165         p.drawPolygon(points, countof(points));
 166
 167         // Paint the text
 168         p.setPen(get_text_colour());
 169         p.setFont(QApplication::font());
 170         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 171 }
 172
 173 bool Trace::pt_in_label_rect(int left, int right, const QPoint &point)
 174 {
 175         (void)left;
 176
 177         const QRectF label = get_label_rect(right);
 178         return enabled() && QRectF(
 179                 QPointF(label.left() - LabelHitPadding,
 180                         label.top() - LabelHitPadding),
 181                 QPointF(right, label.bottom() + LabelHitPadding)
 182                         ).contains(point);
 183 }
 184
 185 QMenu* Trace::create_context_menu(QWidget *parent)
 186 {
 187         QMenu *const menu = SelectableItem::create_context_menu(parent);
 188
 189         return menu;
 190 }
 191
 192 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 193 {
 194         using pv::widgets::Popup;
 195
 196         _popup = new Popup(parent);
 197
 198         create_popup_form();
 199
 200         connect(_popup, SIGNAL(closed()),
 201                 this, SLOT(on_popup_closed()));
 202
 203         return _popup;
 204 }
 205
 206 int Trace::get_y() const
 207 {
 208         return _v_offset - _view->v_offset();
 209 }
 210
 211 QRectF Trace::get_label_rect(int right)
 212 {
 213         using pv::view::View;
 214
 215         assert(_view);
 216
 217         QFontMetrics m(QApplication::font());
 218         const QSize text_size(
 219                 m.boundingRect(QRect(), 0, _name).width(),
 220                 m.boundingRect(QRect(), 0, "Tg").height());
 221         const QSizeF label_size(
 222                 text_size.width() + View::LabelPadding.width() * 2,
 223                 ceilf((text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 224         const float label_arrow_length = label_size.height() / 2;
 225         return QRectF(
 226                 right - label_arrow_length - label_size.width() - 0.5,
 227                 get_y() + 0.5f - label_size.height() / 2,
 228                 label_size.width(), label_size.height());
 229 }
 230
 231 QColor Trace::get_text_colour() const
 232 {
 233         return (_colour.lightness() > 64) ? Qt::black : Qt::white;
 234 }
 235
 236 void Trace::paint_axis(QPainter &p, int y, int left, int right)
 237 {
 238         p.setPen(AxisPen);
 239         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
 240 }
 241
 242 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 243 {
 244         using pv::widgets::ColourButton;
 245
 246         ColourButton *const colour_button = new ColourButton(
 247                 TracePalette::Rows, TracePalette::Cols, parent);
 248         colour_button->set_palette(TracePalette::Colours);
 249         colour_button->set_colour(_colour);
 250         connect(colour_button, SIGNAL(selected(const QColor&)),
 251                 this, SLOT(on_colour_changed(const QColor&)));
 252
 253         form->addRow(tr("Colour"), colour_button);
 254 }
 255
 256 void Trace::create_popup_form()
 257 {
 258         // Clear the layout
 259
 260         // Transfer the layout and the child widgets to a temporary widget
 261         // which then goes out of scope destroying the layout and all the child
 262         // widgets.
 263         if (_popup_form)
 264                 QWidget().setLayout(_popup_form);
 265
 266         // Repopulate the popup
 267         _popup_form = new QFormLayout(_popup);
 268         _popup->setLayout(_popup_form);
 269         populate_popup_form(_popup, _popup_form);
 270 }
 271
 272 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 273 {
 274         QLineEdit *const name_edit = new QLineEdit(parent);
 275         name_edit->setText(_name);
 276         connect(name_edit, SIGNAL(textChanged(const QString&)),
 277                 this, SLOT(on_text_changed(const QString&)));
 278         form->addRow(tr("Name"), name_edit);
 279
 280         add_colour_option(parent, form);
 281 }
 282
 283 void Trace::hover_point_changed()
 284 {
 285 }
 286
 287 void Trace::on_popup_closed()
 288 {
 289         _popup = NULL;
 290         _popup_form = NULL;
 291 }
 292
 293 void Trace::on_text_changed(const QString &text)
 294 {
 295         set_name(text);
 296         text_changed();
 297 }
 298
 299 void Trace::on_colour_changed(const QColor &colour)
 300 {
 301         set_colour(colour);
 302         colour_changed();
 303 }
 304
 305 void Trace::on_hover_point_changed()
 306 {
 307         hover_point_changed();
 308 }
 309
 310 } // namespace view
 311 } // namespace pv