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 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  84 {
  85         const int y = get_visual_y();
  86
  87         p.setBrush(colour_);
  88
  89         if (!enabled())
  90                 return;
  91
  92         const QRectF r = label_rect(rect);
  93
  94         // Paint the label
  95         const float label_arrow_length = r.height() / 2;
  96         const QPointF points[] = {
  97                 r.topLeft(),
  98                 QPointF(r.right() - label_arrow_length, r.top()),
  99                 QPointF(r.right(), y),
 100                 QPointF(r.right() - label_arrow_length, r.bottom()),
 101                 r.bottomLeft()
 102         };
 103         const QPointF highlight_points[] = {
 104                 QPointF(r.left() + 1, r.top() + 1),
 105                 QPointF(r.right() - label_arrow_length, r.top() + 1),
 106                 QPointF(r.right() - 1, y),
 107                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 108                 QPointF(r.left() + 1, r.bottom() - 1)
 109         };
 110
 111         if (selected()) {
 112                 p.setPen(highlight_pen());
 113                 p.setBrush(Qt::transparent);
 114                 p.drawPolygon(points, countof(points));
 115         }
 116
 117         p.setPen(Qt::transparent);
 118         p.setBrush(hover ? colour_.lighter() : colour_);
 119         p.drawPolygon(points, countof(points));
 120
 121         p.setPen(colour_.lighter());
 122         p.setBrush(Qt::transparent);
 123         p.drawPolygon(highlight_points, countof(highlight_points));
 124
 125         p.setPen(colour_.darker());
 126         p.setBrush(Qt::transparent);
 127         p.drawPolygon(points, countof(points));
 128
 129         // Paint the text
 130         p.setPen(select_text_colour(colour_));
 131         p.setFont(QApplication::font());
 132         p.drawText(QRectF(r.x(), r.y(),
 133                 r.width() - label_arrow_length, r.height()),
 134                 Qt::AlignCenter | Qt::AlignVCenter, name_);
 135 }
 136
 137 QMenu* Trace::create_context_menu(QWidget *parent)
 138 {
 139         QMenu *const menu = ViewItem::create_context_menu(parent);
 140
 141         return menu;
 142 }
 143
 144 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 145 {
 146         using pv::widgets::Popup;
 147
 148         popup_ = new Popup(parent);
 149         popup_->set_position(parent->mapToGlobal(
 150                 point(parent->rect())), Popup::Right);
 151
 152         create_popup_form();
 153
 154         connect(popup_, SIGNAL(closed()),
 155                 this, SLOT(on_popup_closed()));
 156
 157         return popup_;
 158 }
 159
 160 QRectF Trace::label_rect(const QRectF &rect) const
 161 {
 162         using pv::view::View;
 163
 164         QFontMetrics m(QApplication::font());
 165         const QSize text_size(
 166                 m.boundingRect(QRect(), 0, name_).width(), m.height());
 167         const QSizeF label_size(
 168                 text_size.width() + LabelPadding.width() * 2,
 169                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 170         const float half_height = label_size.height() / 2;
 171         return QRectF(
 172                 rect.right() - half_height - label_size.width() - 0.5,
 173                 get_visual_y() + 0.5f - half_height,
 174                 label_size.width() + half_height,
 175                 label_size.height());
 176 }
 177
 178 QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 179 {
 180         const float h = QFontMetrics(QApplication::font()).height();
 181         return QRectF(pp.left(), get_visual_y() - h / 2.0f,
 182                 pp.width(), h);
 183 }
 184
 185 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 186 {
 187         if (coloured_bg_)
 188                 p.setBrush(bgcolour_);
 189         else
 190                 p.setBrush(bgcolour_state_ ? BrightBGColour : DarkBGColour);
 191
 192         p.setPen(QPen(Qt::NoPen));
 193
 194         const std::pair<int, int> extents = v_extents();
 195
 196         const int x = 0;
 197         const int y = get_visual_y() + extents.first;
 198         const int w = pp.right() - pp.left();
 199         const int h = extents.second - extents.first;
 200
 201         p.drawRect(x, y, w, h);
 202 }
 203
 204 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 205 {
 206         p.setPen(AxisPen);
 207         p.drawLine(QPointF(pp.left(), y + 0.5f), QPointF(pp.right(), y + 0.5f));
 208 }
 209
 210 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 211 {
 212         using pv::widgets::ColourButton;
 213
 214         ColourButton *const colour_button = new ColourButton(
 215                 TracePalette::Rows, TracePalette::Cols, parent);
 216         colour_button->set_palette(TracePalette::Colours);
 217         colour_button->set_colour(colour_);
 218         connect(colour_button, SIGNAL(selected(const QColor&)),
 219                 this, SLOT(on_colour_changed(const QColor&)));
 220
 221         form->addRow(tr("Colour"), colour_button);
 222 }
 223
 224 void Trace::create_popup_form()
 225 {
 226         // Clear the layout
 227
 228         // Transfer the layout and the child widgets to a temporary widget
 229         // which then goes out of scope destroying the layout and all the child
 230         // widgets.
 231         if (popup_form_)
 232                 QWidget().setLayout(popup_form_);
 233
 234         // Repopulate the popup
 235         popup_form_ = new QFormLayout(popup_);
 236         popup_->setLayout(popup_form_);
 237         populate_popup_form(popup_, popup_form_);
 238 }
 239
 240 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 241 {
 242         QLineEdit *const name_edit = new QLineEdit(parent);
 243         name_edit->setText(name_);
 244         connect(name_edit, SIGNAL(textChanged(const QString&)),
 245                 this, SLOT(on_text_changed(const QString&)));
 246         form->addRow(tr("Name"), name_edit);
 247
 248         add_colour_option(parent, form);
 249 }
 250
 251 void Trace::on_popup_closed()
 252 {
 253         popup_ = nullptr;
 254         popup_form_ = nullptr;
 255 }
 256
 257 void Trace::on_text_changed(const QString &text)
 258 {
 259         set_name(text);
 260
 261         if (owner_)
 262                 owner_->extents_changed(true, false);
 263 }
 264
 265 void Trace::on_colour_changed(const QColor &colour)
 266 {
 267         set_colour(colour);
 268
 269         if (owner_)
 270                 owner_->row_item_appearance_changed(true, true);
 271 }
 272
 273 } // namespace view
 274 } // namespace pv