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         _view = view;
  87 }
  88
  89 void Trace::paint_back(QPainter &p, int left, int right)
  90 {
  91         (void)p;
  92         (void)left;
  93         (void)right;
  94 }
  95
  96 void Trace::paint_mid(QPainter &p, int left, int right)
  97 {
  98         (void)p;
  99         (void)left;
 100         (void)right;
 101 }
 102
 103 void Trace::paint_fore(QPainter &p, int left, int right)
 104 {
 105         (void)p;
 106         (void)left;
 107         (void)right;
 108 }
 109
 110 void Trace::paint_label(QPainter &p, int right, bool hover)
 111 {
 112         assert(_view);
 113         const int y = _v_offset - _view->v_offset();
 114
 115         p.setBrush(_colour);
 116
 117         if (!enabled())
 118                 return;
 119
 120         const QColor colour = get_colour();
 121
 122         const QRectF r = label_rect(right);
 123
 124         // Paint the label
 125         const float label_arrow_length = r.height() / 2;
 126         const QPointF points[] = {
 127                 r.topLeft(),
 128                 QPointF(r.right() - label_arrow_length, r.top()),
 129                 QPointF(r.right(), y),
 130                 QPointF(r.right() - label_arrow_length, r.bottom()),
 131                 r.bottomLeft()
 132         };
 133         const QPointF highlight_points[] = {
 134                 QPointF(r.left() + 1, r.top() + 1),
 135                 QPointF(r.right() - label_arrow_length, r.top() + 1),
 136                 QPointF(r.right() - 1, y),
 137                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 138                 QPointF(r.left() + 1, r.bottom() - 1)
 139         };
 140
 141         if (selected()) {
 142                 p.setPen(highlight_pen());
 143                 p.setBrush(Qt::transparent);
 144                 p.drawPolygon(points, countof(points));
 145         }
 146
 147         p.setPen(Qt::transparent);
 148         p.setBrush(hover ? colour.lighter() : colour);
 149         p.drawPolygon(points, countof(points));
 150
 151         p.setPen(colour.lighter());
 152         p.setBrush(Qt::transparent);
 153         p.drawPolygon(highlight_points, countof(highlight_points));
 154
 155         p.setPen(colour.darker());
 156         p.setBrush(Qt::transparent);
 157         p.drawPolygon(points, countof(points));
 158
 159         // Paint the text
 160         p.setPen(get_text_colour());
 161         p.setFont(QApplication::font());
 162         p.drawText(QRectF(r.x(), r.y(),
 163                 r.width() - label_arrow_length, r.height()),
 164                 Qt::AlignCenter | Qt::AlignVCenter, _name);
 165 }
 166
 167 bool Trace::pt_in_label_rect(int left, int right, const QPoint &point)
 168 {
 169         (void)left;
 170         return enabled() && label_rect(right).contains(point);
 171 }
 172
 173 QMenu* Trace::create_context_menu(QWidget *parent)
 174 {
 175         QMenu *const menu = SelectableItem::create_context_menu(parent);
 176
 177         return menu;
 178 }
 179
 180 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 181 {
 182         using pv::widgets::Popup;
 183
 184         _popup = new Popup(parent);
 185
 186         create_popup_form();
 187
 188         connect(_popup, SIGNAL(closed()),
 189                 this, SLOT(on_popup_closed()));
 190
 191         return _popup;
 192 }
 193
 194 int Trace::get_y() const
 195 {
 196         return _v_offset - _view->v_offset();
 197 }
 198
 199 QRectF Trace::label_rect(int right)
 200 {
 201         using pv::view::View;
 202
 203         assert(_view);
 204
 205         QFontMetrics m(QApplication::font());
 206         const QSize text_size(
 207                 m.boundingRect(QRect(), 0, _name).width(),
 208                 m.boundingRect(QRect(), 0, "Tg").height());
 209         const QSizeF label_size(
 210                 text_size.width() + View::LabelPadding.width() * 2,
 211                 ceilf((text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 212         const float half_height = label_size.height() / 2;
 213         return QRectF(
 214                 right - half_height - label_size.width() - 0.5,
 215                 get_y() + 0.5f - half_height,
 216                 label_size.width() + half_height,
 217                 label_size.height());
 218 }
 219
 220 void Trace::hover_point_changed()
 221 {
 222 }
 223
 224 QColor Trace::get_text_colour() const
 225 {
 226         return (_colour.lightness() > 64) ? Qt::black : Qt::white;
 227 }
 228
 229 void Trace::paint_axis(QPainter &p, int y, int left, int right)
 230 {
 231         p.setPen(AxisPen);
 232         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
 233 }
 234
 235 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 236 {
 237         using pv::widgets::ColourButton;
 238
 239         ColourButton *const colour_button = new ColourButton(
 240                 TracePalette::Rows, TracePalette::Cols, parent);
 241         colour_button->set_palette(TracePalette::Colours);
 242         colour_button->set_colour(_colour);
 243         connect(colour_button, SIGNAL(selected(const QColor&)),
 244                 this, SLOT(on_colour_changed(const QColor&)));
 245
 246         form->addRow(tr("Colour"), colour_button);
 247 }
 248
 249 void Trace::create_popup_form()
 250 {
 251         // Clear the layout
 252
 253         // Transfer the layout and the child widgets to a temporary widget
 254         // which then goes out of scope destroying the layout and all the child
 255         // widgets.
 256         if (_popup_form)
 257                 QWidget().setLayout(_popup_form);
 258
 259         // Repopulate the popup
 260         _popup_form = new QFormLayout(_popup);
 261         _popup->setLayout(_popup_form);
 262         populate_popup_form(_popup, _popup_form);
 263 }
 264
 265 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 266 {
 267         QLineEdit *const name_edit = new QLineEdit(parent);
 268         name_edit->setText(_name);
 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