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 Trace::Trace(QString name) :
  45         name_(name),
  46         coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
  47         popup_(nullptr),
  48         popup_form_(nullptr)
  49 {
  50 }
  51
  52 QString Trace::name() const
  53 {
  54         return name_;
  55 }
  56
  57 void Trace::set_name(QString name)
  58 {
  59         name_ = name;
  60 }
  61
  62 QColor Trace::colour() const
  63 {
  64         return colour_;
  65 }
  66
  67 void Trace::set_colour(QColor colour)
  68 {
  69         colour_ = colour;
  70
  71         bgcolour_ = colour;
  72         bgcolour_.setAlpha(20);
  73 }
  74
  75 void Trace::set_coloured_bg(bool state)
  76 {
  77         coloured_bg_ = state;
  78 }
  79
  80 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  81 {
  82         const int y = get_visual_y();
  83
  84         p.setBrush(colour_);
  85
  86         if (!enabled())
  87                 return;
  88
  89         const QRectF r = label_rect(rect);
  90
  91         // Paint the label
  92         const float label_arrow_length = r.height() / 2;
  93         const QPointF points[] = {
  94                 r.topLeft(),
  95                 QPointF(r.right() - label_arrow_length, r.top()),
  96                 QPointF(r.right(), y),
  97                 QPointF(r.right() - label_arrow_length, r.bottom()),
  98                 r.bottomLeft()
  99         };
 100         const QPointF highlight_points[] = {
 101                 QPointF(r.left() + 1, r.top() + 1),
 102                 QPointF(r.right() - label_arrow_length, r.top() + 1),
 103                 QPointF(r.right() - 1, y),
 104                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 105                 QPointF(r.left() + 1, r.bottom() - 1)
 106         };
 107
 108         if (selected()) {
 109                 p.setPen(highlight_pen());
 110                 p.setBrush(Qt::transparent);
 111                 p.drawPolygon(points, countof(points));
 112         }
 113
 114         p.setPen(Qt::transparent);
 115         p.setBrush(hover ? colour_.lighter() : colour_);
 116         p.drawPolygon(points, countof(points));
 117
 118         p.setPen(colour_.lighter());
 119         p.setBrush(Qt::transparent);
 120         p.drawPolygon(highlight_points, countof(highlight_points));
 121
 122         p.setPen(colour_.darker());
 123         p.setBrush(Qt::transparent);
 124         p.drawPolygon(points, countof(points));
 125
 126         // Paint the text
 127         p.setPen(select_text_colour(colour_));
 128         p.setFont(QApplication::font());
 129         p.drawText(QRectF(r.x(), r.y(),
 130                 r.width() - label_arrow_length, r.height()),
 131                 Qt::AlignCenter | Qt::AlignVCenter, name_);
 132 }
 133
 134 QMenu* Trace::create_context_menu(QWidget *parent)
 135 {
 136         QMenu *const menu = ViewItem::create_context_menu(parent);
 137
 138         return menu;
 139 }
 140
 141 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 142 {
 143         using pv::widgets::Popup;
 144
 145         popup_ = new Popup(parent);
 146         popup_->set_position(parent->mapToGlobal(
 147                 point(parent->rect())), Popup::Right);
 148
 149         create_popup_form();
 150
 151         connect(popup_, SIGNAL(closed()),
 152                 this, SLOT(on_popup_closed()));
 153
 154         return popup_;
 155 }
 156
 157 QRectF Trace::label_rect(const QRectF &rect) const
 158 {
 159         using pv::view::View;
 160
 161         QFontMetrics m(QApplication::font());
 162         const QSize text_size(
 163                 m.boundingRect(QRect(), 0, name_).width(), m.height());
 164         const QSizeF label_size(
 165                 text_size.width() + LabelPadding.width() * 2,
 166                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 167         const float half_height = label_size.height() / 2;
 168         return QRectF(
 169                 rect.right() - half_height - label_size.width() - 0.5,
 170                 get_visual_y() + 0.5f - half_height,
 171                 label_size.width() + half_height,
 172                 label_size.height());
 173 }
 174
 175 QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 176 {
 177         const float h = QFontMetrics(QApplication::font()).height();
 178         return QRectF(pp.left(), get_visual_y() - h / 2.0f,
 179                 pp.width(), h);
 180 }
 181
 182 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 183 {
 184         if (coloured_bg_) {
 185                 p.setPen(QPen(Qt::NoPen));
 186                 p.setBrush(bgcolour_);
 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
 199 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 200 {
 201         p.setPen(AxisPen);
 202         p.drawLine(QPointF(pp.left(), y + 0.5f), QPointF(pp.right(), y + 0.5f));
 203 }
 204
 205 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 206 {
 207         using pv::widgets::ColourButton;
 208
 209         ColourButton *const colour_button = new ColourButton(
 210                 TracePalette::Rows, TracePalette::Cols, parent);
 211         colour_button->set_palette(TracePalette::Colours);
 212         colour_button->set_colour(colour_);
 213         connect(colour_button, SIGNAL(selected(const QColor&)),
 214                 this, SLOT(on_colour_changed(const QColor&)));
 215
 216         form->addRow(tr("Colour"), colour_button);
 217 }
 218
 219 void Trace::create_popup_form()
 220 {
 221         // Clear the layout
 222
 223         // Transfer the layout and the child widgets to a temporary widget
 224         // which then goes out of scope destroying the layout and all the child
 225         // widgets.
 226         if (popup_form_)
 227                 QWidget().setLayout(popup_form_);
 228
 229         // Repopulate the popup
 230         popup_form_ = new QFormLayout(popup_);
 231         popup_->setLayout(popup_form_);
 232         populate_popup_form(popup_, popup_form_);
 233 }
 234
 235 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 236 {
 237         QLineEdit *const name_edit = new QLineEdit(parent);
 238         name_edit->setText(name_);
 239         connect(name_edit, SIGNAL(textChanged(const QString&)),
 240                 this, SLOT(on_text_changed(const QString&)));
 241         form->addRow(tr("Name"), name_edit);
 242
 243         add_colour_option(parent, form);
 244 }
 245
 246 void Trace::on_popup_closed()
 247 {
 248         popup_ = nullptr;
 249         popup_form_ = nullptr;
 250 }
 251
 252 void Trace::on_text_changed(const QString &text)
 253 {
 254         set_name(text);
 255
 256         if (owner_)
 257                 owner_->extents_changed(true, false);
 258 }
 259
 260 void Trace::on_colour_changed(const QColor &colour)
 261 {
 262         set_colour(colour);
 263
 264         if (owner_)
 265                 owner_->row_item_appearance_changed(true, true);
 266 }
 267
 268 } // namespace view
 269 } // namespace pv