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(0, 0, 0, 30*256/100));
  42 const int Trace::LabelHitPadding = 2;
  43
  44 const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
  45 const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);
  46
  47 Trace::Trace(std::shared_ptr<data::SignalBase> channel) :
  48         base_(channel),
  49         coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
  50         popup_(nullptr),
  51         popup_form_(nullptr)
  52 {
  53         connect(channel.get(), SIGNAL(name_changed(const QString&)),
  54                 this, SLOT(on_name_changed(const QString&)));
  55         connect(channel.get(), SIGNAL(colour_changed(const QColor&)),
  56                 this, SLOT(on_colour_changed(const QColor&)));
  57 }
  58
  59 void Trace::set_coloured_bg(bool state)
  60 {
  61         coloured_bg_ = state;
  62 }
  63
  64 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  65 {
  66         const int y = get_visual_y();
  67
  68         p.setBrush(base_->colour());
  69
  70         if (!enabled())
  71                 return;
  72
  73         const QRectF r = label_rect(rect);
  74
  75         // Paint the label
  76         const float label_arrow_length = r.height() / 2;
  77         const QPointF points[] = {
  78                 r.topLeft(),
  79                 QPointF(r.right() - label_arrow_length, r.top()),
  80                 QPointF(r.right(), y),
  81                 QPointF(r.right() - label_arrow_length, r.bottom()),
  82                 r.bottomLeft()
  83         };
  84         const QPointF highlight_points[] = {
  85                 QPointF(r.left() + 1, r.top() + 1),
  86                 QPointF(r.right() - label_arrow_length, r.top() + 1),
  87                 QPointF(r.right() - 1, y),
  88                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
  89                 QPointF(r.left() + 1, r.bottom() - 1)
  90         };
  91
  92         if (selected()) {
  93                 p.setPen(highlight_pen());
  94                 p.setBrush(Qt::transparent);
  95                 p.drawPolygon(points, countof(points));
  96         }
  97
  98         p.setPen(Qt::transparent);
  99         p.setBrush(hover ? base_->colour().lighter() : base_->colour());
 100         p.drawPolygon(points, countof(points));
 101
 102         p.setPen(base_->colour().lighter());
 103         p.setBrush(Qt::transparent);
 104         p.drawPolygon(highlight_points, countof(highlight_points));
 105
 106         p.setPen(base_->colour().darker());
 107         p.setBrush(Qt::transparent);
 108         p.drawPolygon(points, countof(points));
 109
 110         // Paint the text
 111         p.setPen(select_text_colour(base_->colour()));
 112         p.setFont(QApplication::font());
 113         p.drawText(QRectF(r.x(), r.y(),
 114                 r.width() - label_arrow_length, r.height()),
 115                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 116 }
 117
 118 QMenu* Trace::create_context_menu(QWidget *parent)
 119 {
 120         QMenu *const menu = ViewItem::create_context_menu(parent);
 121
 122         return menu;
 123 }
 124
 125 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 126 {
 127         using pv::widgets::Popup;
 128
 129         popup_ = new Popup(parent);
 130         popup_->set_position(parent->mapToGlobal(
 131                 point(parent->rect())), Popup::Right);
 132
 133         create_popup_form();
 134
 135         connect(popup_, SIGNAL(closed()),
 136                 this, SLOT(on_popup_closed()));
 137
 138         return popup_;
 139 }
 140
 141 QRectF Trace::label_rect(const QRectF &rect) const
 142 {
 143         using pv::view::View;
 144
 145         QFontMetrics m(QApplication::font());
 146         const QSize text_size(
 147                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 148         const QSizeF label_size(
 149                 text_size.width() + LabelPadding.width() * 2,
 150                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 151         const float half_height = label_size.height() / 2;
 152         return QRectF(
 153                 rect.right() - half_height - label_size.width() - 0.5,
 154                 get_visual_y() + 0.5f - half_height,
 155                 label_size.width() + half_height,
 156                 label_size.height());
 157 }
 158
 159 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 160 {
 161         if (coloured_bg_)
 162                 p.setBrush(base_->bgcolour());
 163         else
 164                 p.setBrush(bgcolour_state_ ? BrightGrayBGColour : DarkGrayBGColour);
 165
 166         p.setPen(QPen(Qt::NoPen));
 167
 168         const std::pair<int, int> extents = v_extents();
 169
 170         const int x = 0;
 171         const int y = get_visual_y() + extents.first;
 172         const int w = pp.right() - pp.left();
 173         const int h = extents.second - extents.first;
 174
 175         p.drawRect(x, y, w, h);
 176 }
 177
 178 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 179 {
 180         p.setRenderHint(QPainter::Antialiasing, false);
 181
 182         p.setPen(AxisPen);
 183         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 184
 185         p.setRenderHint(QPainter::Antialiasing, true);
 186 }
 187
 188 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 189 {
 190         using pv::widgets::ColourButton;
 191
 192         ColourButton *const colour_button = new ColourButton(
 193                 TracePalette::Rows, TracePalette::Cols, parent);
 194         colour_button->set_palette(TracePalette::Colours);
 195         colour_button->set_colour(base_->colour());
 196         connect(colour_button, SIGNAL(selected(const QColor&)),
 197                 this, SLOT(on_colouredit_changed(const QColor&)));
 198
 199         form->addRow(tr("Colour"), colour_button);
 200 }
 201
 202 void Trace::create_popup_form()
 203 {
 204         // Clear the layout
 205
 206         // Transfer the layout and the child widgets to a temporary widget
 207         // which we delete after the event was handled. This way, the layout
 208         // and all widgets contained therein are deleted after the event was
 209         // handled, leaving the parent popup_ time to handle the change.
 210         if (popup_form_) {
 211                 QWidget *suicidal = new QWidget();
 212                 suicidal->setLayout(popup_form_);
 213                 suicidal->deleteLater();
 214         }
 215
 216         // Repopulate the popup
 217         popup_form_ = new QFormLayout(popup_);
 218         popup_->setLayout(popup_form_);
 219         populate_popup_form(popup_, popup_form_);
 220 }
 221
 222 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 223 {
 224         QLineEdit *const name_edit = new QLineEdit(parent);
 225         name_edit->setText(base_->name());
 226         connect(name_edit, SIGNAL(textChanged(const QString&)),
 227                 this, SLOT(on_nameedit_changed(const QString&)));
 228         form->addRow(tr("Name"), name_edit);
 229
 230         add_colour_option(parent, form);
 231 }
 232
 233 void Trace::set_name(QString name)
 234 {
 235         base_->set_name(name);
 236 }
 237
 238 void Trace::set_colour(QColor colour)
 239 {
 240         base_->set_colour(colour);
 241 }
 242
 243 void Trace::on_name_changed(const QString &text)
 244 {
 245         /* This event handler is called by SignalBase when the name was changed there */
 246         (void)text;
 247
 248         if (owner_) {
 249                 owner_->extents_changed(true, false);
 250                 owner_->row_item_appearance_changed(true, false);
 251         }
 252 }
 253
 254 void Trace::on_colour_changed(const QColor &colour)
 255 {
 256         /* This event handler is called by SignalBase when the colour was changed there */
 257         (void)colour;
 258
 259         if (owner_)
 260                 owner_->row_item_appearance_changed(true, true);
 261 }
 262
 263 void Trace::on_popup_closed()
 264 {
 265         popup_ = nullptr;
 266         popup_form_ = nullptr;
 267 }
 268
 269 void Trace::on_nameedit_changed(const QString &name)
 270 {
 271         /* This event handler notifies SignalBase that the name changed */
 272         set_name(name);
 273 }
 274
 275 void Trace::on_colouredit_changed(const QColor &colour)
 276 {
 277         /* This event handler notifies SignalBase that the colour changed */
 278         set_colour(colour);
 279 }
 280
 281 } // namespace view
 282 } // namespace pv