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 shared_ptr<data::SignalBase> Trace::base() const
  72 {
  73         return base_;
  74 }
  75
  76 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
  77 {
  78         segment_display_mode_ = mode;
  79
  80         if (owner_)
  81                 owner_->row_item_appearance_changed(true, true);
  82 }
  83
  84 void Trace::on_setting_changed(const QString &key, const QVariant &value)
  85 {
  86         if (key == GlobalSettings::Key_View_ShowHoverMarker)
  87                 show_hover_marker_ = value.toBool();
  88 }
  89
  90 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  91 {
  92         const int y = get_visual_y();
  93
  94         p.setBrush(base_->color());
  95
  96         if (!enabled())
  97                 return;
  98
  99         const QRectF r = label_rect(rect);
 100
 101         // When selected, move the arrow to the left so that the border can show
 102         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
 103
 104         // Paint the label
 105         const float label_arrow_length = r.height() / 2;
 106         QPointF points[] = {
 107                 offs + r.topLeft(),
 108                 offs + QPointF(r.right() - label_arrow_length, r.top()),
 109                 offs + QPointF(r.right(), y),
 110                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
 111                 offs + r.bottomLeft()
 112         };
 113         QPointF highlight_points[] = {
 114                 offs + QPointF(r.left() + 1, r.top() + 1),
 115                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
 116                 offs + QPointF(r.right() - 1, y),
 117                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 118                 offs + QPointF(r.left() + 1, r.bottom() - 1)
 119         };
 120
 121         if (selected()) {
 122                 p.setPen(highlight_pen());
 123                 p.setBrush(Qt::transparent);
 124                 p.drawPolygon(points, countof(points));
 125         }
 126
 127         p.setPen(Qt::transparent);
 128         p.setBrush(hover ? base_->color().lighter() : base_->color());
 129         p.drawPolygon(points, countof(points));
 130
 131         p.setPen(base_->color().lighter());
 132         p.setBrush(Qt::transparent);
 133         p.drawPolygon(highlight_points, countof(highlight_points));
 134
 135         p.setPen(base_->color().darker());
 136         p.setBrush(Qt::transparent);
 137         p.drawPolygon(points, countof(points));
 138
 139         // Paint the text
 140         p.setPen(select_text_color(base_->color()));
 141         p.setFont(QApplication::font());
 142         p.drawText(QRectF(r.x(), r.y(),
 143                 r.width() - label_arrow_length, r.height()),
 144                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 145 }
 146
 147 QMenu* Trace::create_context_menu(QWidget *parent)
 148 {
 149         QMenu *const menu = ViewItem::create_context_menu(parent);
 150
 151         return menu;
 152 }
 153
 154 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 155 {
 156         using pv::widgets::Popup;
 157
 158         popup_ = new Popup(parent);
 159         popup_->set_position(parent->mapToGlobal(
 160                 drag_point(parent->rect())), Popup::Right);
 161
 162         create_popup_form();
 163
 164         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
 165
 166         return popup_;
 167 }
 168
 169 QRectF Trace::label_rect(const QRectF &rect) const
 170 {
 171         QFontMetrics m(QApplication::font());
 172         const QSize text_size(
 173                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 174         const QSizeF label_size(
 175                 text_size.width() + LabelPadding.width() * 2,
 176                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 177         const float half_height = label_size.height() / 2;
 178         return QRectF(
 179                 rect.right() - half_height - label_size.width() - 0.5,
 180                 get_visual_y() + 0.5f - half_height,
 181                 label_size.width() + half_height,
 182                 label_size.height());
 183 }
 184
 185 void Trace::set_current_segment(const int segment)
 186 {
 187         current_segment_ = segment;
 188 }
 189
 190 int Trace::get_current_segment() const
 191 {
 192         return current_segment_;
 193 }
 194
 195 void Trace::hover_point_changed(const QPoint &hp)
 196 {
 197         (void)hp;
 198
 199         if (owner_)
 200                 owner_->row_item_appearance_changed(false, true);
 201 }
 202
 203 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 204 {
 205         const View *view = owner_->view();
 206         assert(view);
 207
 208         if (view->colored_bg())
 209                 p.setBrush(base_->bgcolor());
 210         else
 211                 p.setBrush(pp.next_bg_color_state() ? BrightGrayBGColor : DarkGrayBGColor);
 212
 213         p.setPen(QPen(Qt::NoPen));
 214
 215         const pair<int, int> extents = v_extents();
 216         p.drawRect(pp.left(), get_visual_y() + extents.first,
 217                 pp.width(), extents.second - extents.first);
 218 }
 219
 220 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 221 {
 222         p.setRenderHint(QPainter::Antialiasing, false);
 223
 224         p.setPen(axis_pen_);
 225         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 226
 227         p.setRenderHint(QPainter::Antialiasing, true);
 228 }
 229
 230 void Trace::add_color_option(QWidget *parent, QFormLayout *form)
 231 {
 232         using pv::widgets::ColorButton;
 233
 234         ColorButton *const color_button = new ColorButton(
 235                 TracePalette::Rows, TracePalette::Cols, parent);
 236         color_button->set_palette(TracePalette::Colors);
 237         color_button->set_color(base_->color());
 238         connect(color_button, SIGNAL(selected(const QColor&)),
 239                 this, SLOT(on_coloredit_changed(const QColor&)));
 240
 241         form->addRow(tr("Color"), color_button);
 242 }
 243
 244 void Trace::paint_hover_marker(QPainter &p)
 245 {
 246         const View *view = owner_->view();
 247         assert(view);
 248
 249         const int x = view->hover_point().x();
 250
 251         if (x == -1)
 252                 return;
 253
 254         p.setPen(QPen(QColor(Qt::lightGray)));
 255
 256         const pair<int, int> extents = v_extents();
 257
 258         p.setRenderHint(QPainter::Antialiasing, false);
 259         p.drawLine(x, get_visual_y() + extents.first,
 260                 x, get_visual_y() + extents.second);
 261         p.setRenderHint(QPainter::Antialiasing, true);
 262 }
 263
 264 void Trace::create_popup_form()
 265 {
 266         // Clear the layout
 267
 268         // Transfer the layout and the child widgets to a temporary widget
 269         // which we delete after the event was handled. This way, the layout
 270         // and all widgets contained therein are deleted after the event was
 271         // handled, leaving the parent popup_ time to handle the change.
 272         if (popup_form_) {
 273                 QWidget *suicidal = new QWidget();
 274                 suicidal->setLayout(popup_form_);
 275                 suicidal->deleteLater();
 276         }
 277
 278         // Repopulate the popup
 279         popup_form_ = new QFormLayout(popup_);
 280         popup_->setLayout(popup_form_);
 281         populate_popup_form(popup_, popup_form_);
 282 }
 283
 284 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 285 {
 286         QLineEdit *const name_edit = new QLineEdit(parent);
 287         name_edit->setText(base_->name());
 288         connect(name_edit, SIGNAL(textChanged(const QString&)),
 289                 this, SLOT(on_nameedit_changed(const QString&)));
 290         form->addRow(tr("Name"), name_edit);
 291
 292         add_color_option(parent, form);
 293 }
 294
 295 void Trace::on_name_changed(const QString &text)
 296 {
 297         /* This event handler is called by SignalBase when the name was changed there */
 298         (void)text;
 299
 300         if (owner_) {
 301                 owner_->extents_changed(true, false);
 302                 owner_->row_item_appearance_changed(true, false);
 303         }
 304 }
 305
 306 void Trace::on_color_changed(const QColor &color)
 307 {
 308         /* This event handler is called by SignalBase when the color was changed there */
 309         (void)color;
 310
 311         if (owner_)
 312                 owner_->row_item_appearance_changed(true, true);
 313 }
 314
 315 void Trace::on_popup_closed()
 316 {
 317         popup_ = nullptr;
 318         popup_form_ = nullptr;
 319 }
 320
 321 void Trace::on_nameedit_changed(const QString &name)
 322 {
 323         /* This event handler notifies SignalBase that the name changed */
 324         base_->set_name(name);
 325 }
 326
 327 void Trace::on_coloredit_changed(const QColor &color)
 328 {
 329         /* This event handler notifies SignalBase that the color changed */
 330         base_->set_color(color);
 331 }
 332
 333 } // namespace trace
 334 } // namespace views
 335 } // namespace pv