pv/views/trace/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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24
  25 #include <QApplication>
  26 #include <QFormLayout>
  27 #include <QKeyEvent>
  28 #include <QLineEdit>
  29
  30 #include "trace.hpp"
  31 #include "tracepalette.hpp"
  32 #include "view.hpp"
  33
  34 #include "pv/globalsettings.hpp"
  35 #include "pv/widgets/colorbutton.hpp"
  36 #include "pv/widgets/popup.hpp"
  37
  38 using std::pair;
  39 using std::shared_ptr;
  40
  41 namespace pv {
  42 namespace views {
  43 namespace trace {
  44
  45 const QPen Trace::AxisPen(QColor(0, 0, 0, 30 * 256 / 100));
  46 const int Trace::LabelHitPadding = 2;
  47
  48 const QColor Trace::BrightGrayBGColor = QColor(0, 0, 0, 10 * 255 / 100);
  49 const QColor Trace::DarkGrayBGColor = QColor(0, 0, 0, 15 * 255 / 100);
  50
  51 Trace::Trace(shared_ptr<data::SignalBase> channel) :
  52         base_(channel),
  53         axis_pen_(AxisPen),
  54         segment_display_mode_(ShowLastSegmentOnly),  // Will be overwritten by View
  55         current_segment_(0),
  56         popup_(nullptr),
  57         popup_form_(nullptr)
  58 {
  59         connect(channel.get(), SIGNAL(name_changed(const QString&)),
  60                 this, SLOT(on_name_changed(const QString&)));
  61         connect(channel.get(), SIGNAL(color_changed(const QColor&)),
  62                 this, SLOT(on_color_changed(const QColor&)));
  63
  64         GlobalSettings::add_change_handler(this);
  65
  66         GlobalSettings settings;
  67         show_hover_marker_ =
  68                 settings.value(GlobalSettings::Key_View_ShowHoverMarker).toBool();
  69 }
  70
  71 Trace::~Trace()
  72 {
  73         GlobalSettings::remove_change_handler(this);
  74 }
  75
  76 shared_ptr<data::SignalBase> Trace::base() const
  77 {
  78         return base_;
  79 }
  80
  81 bool Trace::is_selectable(QPoint pos) const
  82 {
  83         // True if the header was clicked, false if the trace area was clicked
  84         const View *view = owner_->view();
  85         assert(view);
  86
  87         return (pos.x() <= view->header_width());
  88 }
  89
  90 bool Trace::is_draggable() const
  91 {
  92         // While the header label that belongs to this trace is draggable,
  93         // the trace itself shall not be
  94         return false;
  95 }
  96
  97 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
  98 {
  99         segment_display_mode_ = mode;
 100
 101         if (owner_)
 102                 owner_->row_item_appearance_changed(true, true);
 103 }
 104
 105 void Trace::on_setting_changed(const QString &key, const QVariant &value)
 106 {
 107         if (key == GlobalSettings::Key_View_ShowHoverMarker)
 108                 show_hover_marker_ = value.toBool();
 109 }
 110
 111 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
 112 {
 113         const int y = get_visual_y();
 114
 115         p.setBrush(base_->color());
 116
 117         if (!enabled())
 118                 return;
 119
 120         const QRectF r = label_rect(rect);
 121
 122         // When selected, move the arrow to the left so that the border can show
 123         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
 124
 125         // Paint the label
 126         const float label_arrow_length = r.height() / 2;
 127         QPointF points[] = {
 128                 offs + r.topLeft(),
 129                 offs + QPointF(r.right() - label_arrow_length, r.top()),
 130                 offs + QPointF(r.right(), y),
 131                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
 132                 offs + r.bottomLeft()
 133         };
 134         QPointF highlight_points[] = {
 135                 offs + QPointF(r.left() + 1, r.top() + 1),
 136                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
 137                 offs + QPointF(r.right() - 1, y),
 138                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 139                 offs + QPointF(r.left() + 1, r.bottom() - 1)
 140         };
 141
 142         if (selected()) {
 143                 p.setPen(highlight_pen());
 144                 p.setBrush(Qt::transparent);
 145                 p.drawPolygon(points, countof(points));
 146         }
 147
 148         p.setPen(Qt::transparent);
 149         p.setBrush(hover ? base_->color().lighter() : base_->color());
 150         p.drawPolygon(points, countof(points));
 151
 152         p.setPen(base_->color().lighter());
 153         p.setBrush(Qt::transparent);
 154         p.drawPolygon(highlight_points, countof(highlight_points));
 155
 156         p.setPen(base_->color().darker());
 157         p.setBrush(Qt::transparent);
 158         p.drawPolygon(points, countof(points));
 159
 160         // Paint the text
 161         p.setPen(select_text_color(base_->color()));
 162         p.setFont(QApplication::font());
 163         p.drawText(QRectF(r.x(), r.y(),
 164                 r.width() - label_arrow_length, r.height()),
 165                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 166 }
 167
 168 QMenu* Trace::create_header_context_menu(QWidget *parent)
 169 {
 170         QMenu *const menu = ViewItem::create_header_context_menu(parent);
 171
 172         return menu;
 173 }
 174
 175 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 176 {
 177         using pv::widgets::Popup;
 178
 179         popup_ = new Popup(parent);
 180         popup_->set_position(parent->mapToGlobal(
 181                 drag_point(parent->rect())), Popup::Right);
 182
 183         create_popup_form();
 184
 185         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
 186
 187         return popup_;
 188 }
 189
 190 QRectF Trace::label_rect(const QRectF &rect) const
 191 {
 192         QFontMetrics m(QApplication::font());
 193         const QSize text_size(
 194                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 195         const QSizeF label_size(
 196                 text_size.width() + LabelPadding.width() * 2,
 197                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 198         const float half_height = label_size.height() / 2;
 199         return QRectF(
 200                 rect.right() - half_height - label_size.width() - 0.5,
 201                 get_visual_y() + 0.5f - half_height,
 202                 label_size.width() + half_height,
 203                 label_size.height());
 204 }
 205
 206 QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 207 {
 208         // This one is only for the trace itself, excluding the header area
 209         const View *view = owner_->view();
 210         assert(view);
 211
 212         pair<int, int> extents = v_extents();
 213         const int top = pp.top() + get_visual_y() + extents.first;
 214         const int height = extents.second - extents.first;
 215
 216         return QRectF(pp.left() + view->header_width(), top,
 217                 pp.width() - view->header_width(), height);
 218 }
 219
 220 void Trace::set_current_segment(const int segment)
 221 {
 222         current_segment_ = segment;
 223 }
 224
 225 int Trace::get_current_segment() const
 226 {
 227         return current_segment_;
 228 }
 229
 230 void Trace::hover_point_changed(const QPoint &hp)
 231 {
 232         (void)hp;
 233
 234         if (owner_)
 235                 owner_->row_item_appearance_changed(false, true);
 236 }
 237
 238 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 239 {
 240         const View *view = owner_->view();
 241         assert(view);
 242
 243         if (view->colored_bg())
 244                 p.setBrush(base_->bgcolor());
 245         else
 246                 p.setBrush(pp.next_bg_color_state() ? BrightGrayBGColor : DarkGrayBGColor);
 247
 248         p.setPen(QPen(Qt::NoPen));
 249
 250         const pair<int, int> extents = v_extents();
 251         p.drawRect(pp.left(), get_visual_y() + extents.first,
 252                 pp.width(), extents.second - extents.first);
 253 }
 254
 255 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 256 {
 257         p.setRenderHint(QPainter::Antialiasing, false);
 258
 259         p.setPen(axis_pen_);
 260         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 261
 262         p.setRenderHint(QPainter::Antialiasing, true);
 263 }
 264
 265 void Trace::add_color_option(QWidget *parent, QFormLayout *form)
 266 {
 267         using pv::widgets::ColorButton;
 268
 269         ColorButton *const color_button = new ColorButton(
 270                 TracePalette::Rows, TracePalette::Cols, parent);
 271         color_button->set_palette(TracePalette::Colors);
 272         color_button->set_color(base_->color());
 273         connect(color_button, SIGNAL(selected(const QColor&)),
 274                 this, SLOT(on_coloredit_changed(const QColor&)));
 275
 276         form->addRow(tr("Color"), color_button);
 277 }
 278
 279 void Trace::paint_hover_marker(QPainter &p)
 280 {
 281         const View *view = owner_->view();
 282         assert(view);
 283
 284         const int x = view->hover_point().x();
 285
 286         if (x == -1)
 287                 return;
 288
 289         p.setPen(QPen(QColor(Qt::lightGray)));
 290
 291         const pair<int, int> extents = v_extents();
 292
 293         p.setRenderHint(QPainter::Antialiasing, false);
 294         p.drawLine(x, get_visual_y() + extents.first,
 295                 x, get_visual_y() + extents.second);
 296         p.setRenderHint(QPainter::Antialiasing, true);
 297 }
 298
 299 void Trace::create_popup_form()
 300 {
 301         // Clear the layout
 302
 303         // Transfer the layout and the child widgets to a temporary widget
 304         // which we delete after the event was handled. This way, the layout
 305         // and all widgets contained therein are deleted after the event was
 306         // handled, leaving the parent popup_ time to handle the change.
 307         if (popup_form_) {
 308                 QWidget *suicidal = new QWidget();
 309                 suicidal->setLayout(popup_form_);
 310                 suicidal->deleteLater();
 311         }
 312
 313         // Repopulate the popup
 314         popup_form_ = new QFormLayout(popup_);
 315         popup_->setLayout(popup_form_);
 316         populate_popup_form(popup_, popup_form_);
 317 }
 318
 319 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 320 {
 321         QLineEdit *const name_edit = new QLineEdit(parent);
 322         name_edit->setText(base_->name());
 323         connect(name_edit, SIGNAL(textChanged(const QString&)),
 324                 this, SLOT(on_nameedit_changed(const QString&)));
 325         form->addRow(tr("Name"), name_edit);
 326
 327         add_color_option(parent, form);
 328 }
 329
 330 void Trace::on_name_changed(const QString &text)
 331 {
 332         /* This event handler is called by SignalBase when the name was changed there */
 333         (void)text;
 334
 335         if (owner_) {
 336                 owner_->extents_changed(true, false);
 337                 owner_->row_item_appearance_changed(true, false);
 338         }
 339 }
 340
 341 void Trace::on_color_changed(const QColor &color)
 342 {
 343         /* This event handler is called by SignalBase when the color was changed there */
 344         (void)color;
 345
 346         if (owner_)
 347                 owner_->row_item_appearance_changed(true, true);
 348 }
 349
 350 void Trace::on_popup_closed()
 351 {
 352         popup_ = nullptr;
 353         popup_form_ = nullptr;
 354 }
 355
 356 void Trace::on_nameedit_changed(const QString &name)
 357 {
 358         /* This event handler notifies SignalBase that the name changed */
 359         base_->set_name(name);
 360 }
 361
 362 void Trace::on_coloredit_changed(const QColor &color)
 363 {
 364         /* This event handler notifies SignalBase that the color changed */
 365         base_->set_color(color);
 366 }
 367
 368 } // namespace trace
 369 } // namespace views
 370 } // namespace pv