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