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 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
  82 {
  83         segment_display_mode_ = mode;
  84
  85         if (owner_)
  86                 owner_->row_item_appearance_changed(true, true);
  87 }
  88
  89 void Trace::on_setting_changed(const QString &key, const QVariant &value)
  90 {
  91         if (key == GlobalSettings::Key_View_ShowHoverMarker)
  92                 show_hover_marker_ = value.toBool();
  93 }
  94
  95 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  96 {
  97         const int y = get_visual_y();
  98
  99         p.setBrush(base_->color());
 100
 101         if (!enabled())
 102                 return;
 103
 104         const QRectF r = label_rect(rect);
 105
 106         // When selected, move the arrow to the left so that the border can show
 107         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
 108
 109         // Paint the label
 110         const float label_arrow_length = r.height() / 2;
 111         QPointF points[] = {
 112                 offs + r.topLeft(),
 113                 offs + QPointF(r.right() - label_arrow_length, r.top()),
 114                 offs + QPointF(r.right(), y),
 115                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
 116                 offs + r.bottomLeft()
 117         };
 118         QPointF highlight_points[] = {
 119                 offs + QPointF(r.left() + 1, r.top() + 1),
 120                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
 121                 offs + QPointF(r.right() - 1, y),
 122                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 123                 offs + QPointF(r.left() + 1, r.bottom() - 1)
 124         };
 125
 126         if (selected()) {
 127                 p.setPen(highlight_pen());
 128                 p.setBrush(Qt::transparent);
 129                 p.drawPolygon(points, countof(points));
 130         }
 131
 132         p.setPen(Qt::transparent);
 133         p.setBrush(hover ? base_->color().lighter() : base_->color());
 134         p.drawPolygon(points, countof(points));
 135
 136         p.setPen(base_->color().lighter());
 137         p.setBrush(Qt::transparent);
 138         p.drawPolygon(highlight_points, countof(highlight_points));
 139
 140         p.setPen(base_->color().darker());
 141         p.setBrush(Qt::transparent);
 142         p.drawPolygon(points, countof(points));
 143
 144         // Paint the text
 145         p.setPen(select_text_color(base_->color()));
 146         p.setFont(QApplication::font());
 147         p.drawText(QRectF(r.x(), r.y(),
 148                 r.width() - label_arrow_length, r.height()),
 149                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 150 }
 151
 152 QMenu* Trace::create_context_menu(QWidget *parent)
 153 {
 154         QMenu *const menu = ViewItem::create_context_menu(parent);
 155
 156         return menu;
 157 }
 158
 159 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 160 {
 161         using pv::widgets::Popup;
 162
 163         popup_ = new Popup(parent);
 164         popup_->set_position(parent->mapToGlobal(
 165                 drag_point(parent->rect())), Popup::Right);
 166
 167         create_popup_form();
 168
 169         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
 170
 171         return popup_;
 172 }
 173
 174 QRectF Trace::label_rect(const QRectF &rect) const
 175 {
 176         QFontMetrics m(QApplication::font());
 177         const QSize text_size(
 178                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 179         const QSizeF label_size(
 180                 text_size.width() + LabelPadding.width() * 2,
 181                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 182         const float half_height = label_size.height() / 2;
 183         return QRectF(
 184                 rect.right() - half_height - label_size.width() - 0.5,
 185                 get_visual_y() + 0.5f - half_height,
 186                 label_size.width() + half_height,
 187                 label_size.height());
 188 }
 189
 190 void Trace::set_current_segment(const int segment)
 191 {
 192         current_segment_ = segment;
 193 }
 194
 195 int Trace::get_current_segment() const
 196 {
 197         return current_segment_;
 198 }
 199
 200 void Trace::hover_point_changed(const QPoint &hp)
 201 {
 202         (void)hp;
 203
 204         if (owner_)
 205                 owner_->row_item_appearance_changed(false, true);
 206 }
 207
 208 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 209 {
 210         const View *view = owner_->view();
 211         assert(view);
 212
 213         if (view->colored_bg())
 214                 p.setBrush(base_->bgcolor());
 215         else
 216                 p.setBrush(pp.next_bg_color_state() ? BrightGrayBGColor : DarkGrayBGColor);
 217
 218         p.setPen(QPen(Qt::NoPen));
 219
 220         const pair<int, int> extents = v_extents();
 221         p.drawRect(pp.left(), get_visual_y() + extents.first,
 222                 pp.width(), extents.second - extents.first);
 223 }
 224
 225 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 226 {
 227         p.setRenderHint(QPainter::Antialiasing, false);
 228
 229         p.setPen(axis_pen_);
 230         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 231
 232         p.setRenderHint(QPainter::Antialiasing, true);
 233 }
 234
 235 void Trace::add_color_option(QWidget *parent, QFormLayout *form)
 236 {
 237         using pv::widgets::ColorButton;
 238
 239         ColorButton *const color_button = new ColorButton(
 240                 TracePalette::Rows, TracePalette::Cols, parent);
 241         color_button->set_palette(TracePalette::Colors);
 242         color_button->set_color(base_->color());
 243         connect(color_button, SIGNAL(selected(const QColor&)),
 244                 this, SLOT(on_coloredit_changed(const QColor&)));
 245
 246         form->addRow(tr("Color"), color_button);
 247 }
 248
 249 void Trace::paint_hover_marker(QPainter &p)
 250 {
 251         const View *view = owner_->view();
 252         assert(view);
 253
 254         const int x = view->hover_point().x();
 255
 256         if (x == -1)
 257                 return;
 258
 259         p.setPen(QPen(QColor(Qt::lightGray)));
 260
 261         const pair<int, int> extents = v_extents();
 262
 263         p.setRenderHint(QPainter::Antialiasing, false);
 264         p.drawLine(x, get_visual_y() + extents.first,
 265                 x, get_visual_y() + extents.second);
 266         p.setRenderHint(QPainter::Antialiasing, true);
 267 }
 268
 269 void Trace::create_popup_form()
 270 {
 271         // Clear the layout
 272
 273         // Transfer the layout and the child widgets to a temporary widget
 274         // which we delete after the event was handled. This way, the layout
 275         // and all widgets contained therein are deleted after the event was
 276         // handled, leaving the parent popup_ time to handle the change.
 277         if (popup_form_) {
 278                 QWidget *suicidal = new QWidget();
 279                 suicidal->setLayout(popup_form_);
 280                 suicidal->deleteLater();
 281         }
 282
 283         // Repopulate the popup
 284         popup_form_ = new QFormLayout(popup_);
 285         popup_->setLayout(popup_form_);
 286         populate_popup_form(popup_, popup_form_);
 287 }
 288
 289 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 290 {
 291         QLineEdit *const name_edit = new QLineEdit(parent);
 292         name_edit->setText(base_->name());
 293         connect(name_edit, SIGNAL(textChanged(const QString&)),
 294                 this, SLOT(on_nameedit_changed(const QString&)));
 295         form->addRow(tr("Name"), name_edit);
 296
 297         add_color_option(parent, form);
 298 }
 299
 300 void Trace::on_name_changed(const QString &text)
 301 {
 302         /* This event handler is called by SignalBase when the name was changed there */
 303         (void)text;
 304
 305         if (owner_) {
 306                 owner_->extents_changed(true, false);
 307                 owner_->row_item_appearance_changed(true, false);
 308         }
 309 }
 310
 311 void Trace::on_color_changed(const QColor &color)
 312 {
 313         /* This event handler is called by SignalBase when the color was changed there */
 314         (void)color;
 315
 316         if (owner_)
 317                 owner_->row_item_appearance_changed(true, true);
 318 }
 319
 320 void Trace::on_popup_closed()
 321 {
 322         popup_ = nullptr;
 323         popup_form_ = nullptr;
 324 }
 325
 326 void Trace::on_nameedit_changed(const QString &name)
 327 {
 328         /* This event handler notifies SignalBase that the name changed */
 329         base_->set_name(name);
 330 }
 331
 332 void Trace::on_coloredit_changed(const QColor &color)
 333 {
 334         /* This event handler notifies SignalBase that the color changed */
 335         base_->set_color(color);
 336 }
 337
 338 } // namespace trace
 339 } // namespace views
 340 } // namespace pv