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 int Trace::ColourBGAlpha = 8*256/100;
  45 const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
  46 const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);
  47
  48 Trace::Trace(QString name) :
  49         name_(name),
  50         coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
  51         popup_(nullptr),
  52         popup_form_(nullptr)
  53 {
  54 }
  55
  56 QString Trace::name() const
  57 {
  58         return name_;
  59 }
  60
  61 void Trace::set_name(QString name)
  62 {
  63         name_ = name;
  64 }
  65
  66 QColor Trace::colour() const
  67 {
  68         return colour_;
  69 }
  70
  71 void Trace::set_colour(QColor colour)
  72 {
  73         colour_ = colour;
  74
  75         bgcolour_ = colour;
  76         bgcolour_.setAlpha(ColourBGAlpha);
  77 }
  78
  79 void Trace::set_coloured_bg(bool state)
  80 {
  81         coloured_bg_ = state;
  82 }
  83
  84 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  85 {
  86         const int y = get_visual_y();
  87
  88         p.setBrush(colour_);
  89
  90         if (!enabled())
  91                 return;
  92
  93         const QRectF r = label_rect(rect);
  94
  95         // Paint the label
  96         const float label_arrow_length = r.height() / 2;
  97         const QPointF points[] = {
  98                 r.topLeft(),
  99                 QPointF(r.right() - label_arrow_length, r.top()),
 100                 QPointF(r.right(), y),
 101                 QPointF(r.right() - label_arrow_length, r.bottom()),
 102                 r.bottomLeft()
 103         };
 104         const QPointF highlight_points[] = {
 105                 QPointF(r.left() + 1, r.top() + 1),
 106                 QPointF(r.right() - label_arrow_length, r.top() + 1),
 107                 QPointF(r.right() - 1, y),
 108                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 109                 QPointF(r.left() + 1, r.bottom() - 1)
 110         };
 111
 112         if (selected()) {
 113                 p.setPen(highlight_pen());
 114                 p.setBrush(Qt::transparent);
 115                 p.drawPolygon(points, countof(points));
 116         }
 117
 118         p.setPen(Qt::transparent);
 119         p.setBrush(hover ? colour_.lighter() : colour_);
 120         p.drawPolygon(points, countof(points));
 121
 122         p.setPen(colour_.lighter());
 123         p.setBrush(Qt::transparent);
 124         p.drawPolygon(highlight_points, countof(highlight_points));
 125
 126         p.setPen(colour_.darker());
 127         p.setBrush(Qt::transparent);
 128         p.drawPolygon(points, countof(points));
 129
 130         // Paint the text
 131         p.setPen(select_text_colour(colour_));
 132         p.setFont(QApplication::font());
 133         p.drawText(QRectF(r.x(), r.y(),
 134                 r.width() - label_arrow_length, r.height()),
 135                 Qt::AlignCenter | Qt::AlignVCenter, name_);
 136 }
 137
 138 QMenu* Trace::create_context_menu(QWidget *parent)
 139 {
 140         QMenu *const menu = ViewItem::create_context_menu(parent);
 141
 142         return menu;
 143 }
 144
 145 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 146 {
 147         using pv::widgets::Popup;
 148
 149         popup_ = new Popup(parent);
 150         popup_->set_position(parent->mapToGlobal(
 151                 point(parent->rect())), Popup::Right);
 152
 153         create_popup_form();
 154
 155         connect(popup_, SIGNAL(closed()),
 156                 this, SLOT(on_popup_closed()));
 157
 158         return popup_;
 159 }
 160
 161 QRectF Trace::label_rect(const QRectF &rect) const
 162 {
 163         using pv::view::View;
 164
 165         QFontMetrics m(QApplication::font());
 166         const QSize text_size(
 167                 m.boundingRect(QRect(), 0, name_).width(), m.height());
 168         const QSizeF label_size(
 169                 text_size.width() + LabelPadding.width() * 2,
 170                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 171         const float half_height = label_size.height() / 2;
 172         return QRectF(
 173                 rect.right() - half_height - label_size.width() - 0.5,
 174                 get_visual_y() + 0.5f - half_height,
 175                 label_size.width() + half_height,
 176                 label_size.height());
 177 }
 178
 179 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 180 {
 181         if (coloured_bg_)
 182                 p.setBrush(bgcolour_);
 183         else
 184                 p.setBrush(bgcolour_state_ ? BrightGrayBGColour : DarkGrayBGColour);
 185
 186         p.setPen(QPen(Qt::NoPen));
 187
 188         const std::pair<int, int> extents = v_extents();
 189
 190         const int x = 0;
 191         const int y = get_visual_y() + extents.first;
 192         const int w = pp.right() - pp.left();
 193         const int h = extents.second - extents.first;
 194
 195         p.drawRect(x, y, w, h);
 196 }
 197
 198 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 199 {
 200         p.setRenderHint(QPainter::Antialiasing, false);
 201
 202         p.setPen(AxisPen);
 203         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 204
 205         p.setRenderHint(QPainter::Antialiasing, true);
 206 }
 207
 208 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 209 {
 210         using pv::widgets::ColourButton;
 211
 212         ColourButton *const colour_button = new ColourButton(
 213                 TracePalette::Rows, TracePalette::Cols, parent);
 214         colour_button->set_palette(TracePalette::Colours);
 215         colour_button->set_colour(colour_);
 216         connect(colour_button, SIGNAL(selected(const QColor&)),
 217                 this, SLOT(on_colour_changed(const QColor&)));
 218
 219         form->addRow(tr("Colour"), colour_button);
 220 }
 221
 222 void Trace::create_popup_form()
 223 {
 224         // Clear the layout
 225
 226         // Transfer the layout and the child widgets to a temporary widget
 227         // which then goes out of scope destroying the layout and all the child
 228         // widgets.
 229         if (popup_form_)
 230                 QWidget().setLayout(popup_form_);
 231
 232         // Repopulate the popup
 233         popup_form_ = new QFormLayout(popup_);
 234         popup_->setLayout(popup_form_);
 235         populate_popup_form(popup_, popup_form_);
 236 }
 237
 238 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 239 {
 240         QLineEdit *const name_edit = new QLineEdit(parent);
 241         name_edit->setText(name_);
 242         connect(name_edit, SIGNAL(textChanged(const QString&)),
 243                 this, SLOT(on_text_changed(const QString&)));
 244         form->addRow(tr("Name"), name_edit);
 245
 246         add_colour_option(parent, form);
 247 }
 248
 249 void Trace::on_popup_closed()
 250 {
 251         popup_ = nullptr;
 252         popup_form_ = nullptr;
 253 }
 254
 255 void Trace::on_text_changed(const QString &text)
 256 {
 257         set_name(text);
 258
 259         if (owner_)
 260                 owner_->extents_changed(true, false);
 261 }
 262
 263 void Trace::on_colour_changed(const QColor &colour)
 264 {
 265         set_colour(colour);
 266
 267         if (owner_)
 268                 owner_->row_item_appearance_changed(true, true);
 269 }
 270
 271 } // namespace view
 272 } // namespace pv