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