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 <cmath>
  25
  26 #include <QApplication>
  27 #include <QFormLayout>
  28 #include <QKeyEvent>
  29 #include <QLineEdit>
  30
  31 #include "trace.hpp"
  32 #include "tracepalette.hpp"
  33 #include "view.hpp"
  34
  35 #include <pv/widgets/colourbutton.hpp>
  36 #include <pv/widgets/popup.hpp>
  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 const QColor Trace::DarkBGColour(235, 235, 235);    // Quite light grey
  45 const QColor Trace::BrightBGColour(245, 245, 245);  // Very light grey
  46
  47 Trace::Trace(QString name) :
  48         name_(name),
  49         coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
  50         popup_(nullptr),
  51         popup_form_(nullptr)
  52 {
  53 }
  54
  55 QString Trace::name() const
  56 {
  57         return name_;
  58 }
  59
  60 void Trace::set_name(QString name)
  61 {
  62         name_ = name;
  63 }
  64
  65 QColor Trace::colour() const
  66 {
  67         return colour_;
  68 }
  69
  70 void Trace::set_colour(QColor colour)
  71 {
  72         colour_ = colour;
  73
  74         bgcolour_ = colour;
  75         bgcolour_.setAlpha(20);
  76 }
  77
  78 void Trace::set_coloured_bg(bool state)
  79 {
  80         coloured_bg_ = state;
  81 }
  82
  83 bool Trace::is_draggable() const
  84 {
  85         const View *const view = owner_->view();
  86         assert(view);
  87
  88         QPoint cursor_pos = view->mapFromGlobal(QCursor::pos());
  89
  90         // The signal is draggable only in the header area
  91         return (cursor_pos.x() <= view->header_size().width());
  92 }
  93
  94 void Trace::select(bool select)
  95 {
  96         // Trace can only be selected if the mouse cursor is in the header area;
  97         // as is_draggable() checks the same thing, we re-use it here
  98         if (is_draggable() && select)
  99                 selected_ = true;
 100         else
 101                 selected_ = false;
 102 }
 103
 104 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
 105 {
 106         const int y = get_visual_y();
 107
 108         p.setBrush(colour_);
 109
 110         if (!enabled())
 111                 return;
 112
 113         const QRectF r = label_rect(rect);
 114
 115         // Paint the label
 116         const float label_arrow_length = r.height() / 2;
 117         const QPointF points[] = {
 118                 r.topLeft(),
 119                 QPointF(r.right() - label_arrow_length, r.top()),
 120                 QPointF(r.right(), y),
 121                 QPointF(r.right() - label_arrow_length, r.bottom()),
 122                 r.bottomLeft()
 123         };
 124         const QPointF highlight_points[] = {
 125                 QPointF(r.left() + 1, r.top() + 1),
 126                 QPointF(r.right() - label_arrow_length, r.top() + 1),
 127                 QPointF(r.right() - 1, y),
 128                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 129                 QPointF(r.left() + 1, r.bottom() - 1)
 130         };
 131
 132         if (selected()) {
 133                 p.setPen(highlight_pen());
 134                 p.setBrush(Qt::transparent);
 135                 p.drawPolygon(points, countof(points));
 136         }
 137
 138         p.setPen(Qt::transparent);
 139         p.setBrush(hover ? colour_.lighter() : colour_);
 140         p.drawPolygon(points, countof(points));
 141
 142         p.setPen(colour_.lighter());
 143         p.setBrush(Qt::transparent);
 144         p.drawPolygon(highlight_points, countof(highlight_points));
 145
 146         p.setPen(colour_.darker());
 147         p.setBrush(Qt::transparent);
 148         p.drawPolygon(points, countof(points));
 149
 150         // Paint the text
 151         p.setPen(select_text_colour(colour_));
 152         p.setFont(QApplication::font());
 153         p.drawText(QRectF(r.x(), r.y(),
 154                 r.width() - label_arrow_length, r.height()),
 155                 Qt::AlignCenter | Qt::AlignVCenter, name_);
 156 }
 157
 158 QMenu* Trace::create_context_menu(QWidget *parent)
 159 {
 160         QMenu *const menu = ViewItem::create_context_menu(parent);
 161
 162         return menu;
 163 }
 164
 165 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 166 {
 167         using pv::widgets::Popup;
 168
 169         popup_ = new Popup(parent);
 170         popup_->set_position(parent->mapToGlobal(
 171                 point(parent->rect())), Popup::Right);
 172
 173         create_popup_form();
 174
 175         connect(popup_, SIGNAL(closed()),
 176                 this, SLOT(on_popup_closed()));
 177
 178         return popup_;
 179 }
 180
 181 QRectF Trace::label_rect(const QRectF &rect) const
 182 {
 183         using pv::view::View;
 184
 185         QFontMetrics m(QApplication::font());
 186         const QSize text_size(
 187                 m.boundingRect(QRect(), 0, name_).width(), m.height());
 188         const QSizeF label_size(
 189                 text_size.width() + LabelPadding.width() * 2,
 190                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 191         const float half_height = label_size.height() / 2;
 192         return QRectF(
 193                 rect.right() - half_height - label_size.width() - 0.5,
 194                 get_visual_y() + 0.5f - half_height,
 195                 label_size.width() + half_height,
 196                 label_size.height());
 197 }
 198
 199 QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 200 {
 201         const float h = QFontMetrics(QApplication::font()).height();
 202         return QRectF(pp.left(), get_visual_y() - h / 2.0f,
 203                 pp.width(), h);
 204 }
 205
 206 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 207 {
 208         if (coloured_bg_)
 209                 p.setBrush(bgcolour_);
 210         else
 211                 p.setBrush(bgcolour_state_ ? BrightBGColour : DarkBGColour);
 212
 213         p.setPen(QPen(Qt::NoPen));
 214
 215         const std::pair<int, int> extents = v_extents();
 216
 217         const int x = 0;
 218         const int y = get_visual_y() + extents.first;
 219         const int w = pp.right() - pp.left();
 220         const int h = extents.second - extents.first;
 221
 222         p.drawRect(x, y, w, h);
 223 }
 224
 225 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 226 {
 227         p.setPen(AxisPen);
 228         p.drawLine(QPointF(pp.left(), y + 0.5f), QPointF(pp.right(), y + 0.5f));
 229 }
 230
 231 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 232 {
 233         using pv::widgets::ColourButton;
 234
 235         ColourButton *const colour_button = new ColourButton(
 236                 TracePalette::Rows, TracePalette::Cols, parent);
 237         colour_button->set_palette(TracePalette::Colours);
 238         colour_button->set_colour(colour_);
 239         connect(colour_button, SIGNAL(selected(const QColor&)),
 240                 this, SLOT(on_colour_changed(const QColor&)));
 241
 242         form->addRow(tr("Colour"), colour_button);
 243 }
 244
 245 void Trace::create_popup_form()
 246 {
 247         // Clear the layout
 248
 249         // Transfer the layout and the child widgets to a temporary widget
 250         // which then goes out of scope destroying the layout and all the child
 251         // widgets.
 252         if (popup_form_)
 253                 QWidget().setLayout(popup_form_);
 254
 255         // Repopulate the popup
 256         popup_form_ = new QFormLayout(popup_);
 257         popup_->setLayout(popup_form_);
 258         populate_popup_form(popup_, popup_form_);
 259 }
 260
 261 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 262 {
 263         QLineEdit *const name_edit = new QLineEdit(parent);
 264         name_edit->setText(name_);
 265         connect(name_edit, SIGNAL(textChanged(const QString&)),
 266                 this, SLOT(on_text_changed(const QString&)));
 267         form->addRow(tr("Name"), name_edit);
 268
 269         add_colour_option(parent, form);
 270 }
 271
 272 void Trace::on_popup_closed()
 273 {
 274         popup_ = nullptr;
 275         popup_form_ = nullptr;
 276 }
 277
 278 void Trace::on_text_changed(const QString &text)
 279 {
 280         set_name(text);
 281
 282         if (owner_)
 283                 owner_->extents_changed(true, false);
 284 }
 285
 286 void Trace::on_colour_changed(const QColor &colour)
 287 {
 288         set_colour(colour);
 289
 290         if (owner_)
 291                 owner_->row_item_appearance_changed(true, true);
 292 }
 293
 294 } // namespace view
 295 } // namespace pv