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         popup_(nullptr),
  47         popup_form_(nullptr)
  48 {
  49 }
  50
  51 QString Trace::name() const
  52 {
  53         return name_;
  54 }
  55
  56 void Trace::set_name(QString name)
  57 {
  58         name_ = name;
  59 }
  60
  61 QColor Trace::colour() const
  62 {
  63         return colour_;
  64 }
  65
  66 void Trace::set_colour(QColor colour)
  67 {
  68         colour_ = colour;
  69
  70         bgcolour_ = colour;
  71         bgcolour_.setAlpha(20);
  72 }
  73
  74 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  75 {
  76         const int y = get_visual_y();
  77
  78         p.setBrush(colour_);
  79
  80         if (!enabled())
  81                 return;
  82
  83         const QRectF r = label_rect(rect);
  84
  85         // Paint the label
  86         const float label_arrow_length = r.height() / 2;
  87         const QPointF points[] = {
  88                 r.topLeft(),
  89                 QPointF(r.right() - label_arrow_length, r.top()),
  90                 QPointF(r.right(), y),
  91                 QPointF(r.right() - label_arrow_length, r.bottom()),
  92                 r.bottomLeft()
  93         };
  94         const QPointF highlight_points[] = {
  95                 QPointF(r.left() + 1, r.top() + 1),
  96                 QPointF(r.right() - label_arrow_length, r.top() + 1),
  97                 QPointF(r.right() - 1, y),
  98                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
  99                 QPointF(r.left() + 1, r.bottom() - 1)
 100         };
 101
 102         if (selected()) {
 103                 p.setPen(highlight_pen());
 104                 p.setBrush(Qt::transparent);
 105                 p.drawPolygon(points, countof(points));
 106         }
 107
 108         p.setPen(Qt::transparent);
 109         p.setBrush(hover ? colour_.lighter() : colour_);
 110         p.drawPolygon(points, countof(points));
 111
 112         p.setPen(colour_.lighter());
 113         p.setBrush(Qt::transparent);
 114         p.drawPolygon(highlight_points, countof(highlight_points));
 115
 116         p.setPen(colour_.darker());
 117         p.setBrush(Qt::transparent);
 118         p.drawPolygon(points, countof(points));
 119
 120         // Paint the text
 121         p.setPen(select_text_colour(colour_));
 122         p.setFont(QApplication::font());
 123         p.drawText(QRectF(r.x(), r.y(),
 124                 r.width() - label_arrow_length, r.height()),
 125                 Qt::AlignCenter | Qt::AlignVCenter, name_);
 126 }
 127
 128 QMenu* Trace::create_context_menu(QWidget *parent)
 129 {
 130         QMenu *const menu = ViewItem::create_context_menu(parent);
 131
 132         return menu;
 133 }
 134
 135 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 136 {
 137         using pv::widgets::Popup;
 138
 139         popup_ = new Popup(parent);
 140         popup_->set_position(parent->mapToGlobal(
 141                 point(parent->rect())), Popup::Right);
 142
 143         create_popup_form();
 144
 145         connect(popup_, SIGNAL(closed()),
 146                 this, SLOT(on_popup_closed()));
 147
 148         return popup_;
 149 }
 150
 151 QRectF Trace::label_rect(const QRectF &rect) const
 152 {
 153         using pv::view::View;
 154
 155         QFontMetrics m(QApplication::font());
 156         const QSize text_size(
 157                 m.boundingRect(QRect(), 0, name_).width(), m.height());
 158         const QSizeF label_size(
 159                 text_size.width() + LabelPadding.width() * 2,
 160                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 161         const float half_height = label_size.height() / 2;
 162         return QRectF(
 163                 rect.right() - half_height - label_size.width() - 0.5,
 164                 get_visual_y() + 0.5f - half_height,
 165                 label_size.width() + half_height,
 166                 label_size.height());
 167 }
 168
 169 QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 170 {
 171         const float h = QFontMetrics(QApplication::font()).height();
 172         return QRectF(pp.left(), get_visual_y() - h / 2.0f,
 173                 pp.width(), h);
 174 }
 175
 176 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 177 {
 178         p.setPen(QPen(Qt::NoPen));
 179         p.setBrush(bgcolour_);
 180
 181         const std::pair<int, int> extents = v_extents();
 182
 183         const int x = 0;
 184         const int y = get_visual_y() + extents.first;
 185         const int w = pp.right() - pp.left();
 186         const int h = extents.second - extents.first;
 187
 188         p.drawRect(x, y, w, h);
 189 }
 190
 191 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 192 {
 193         p.setPen(AxisPen);
 194         p.drawLine(QPointF(pp.left(), y + 0.5f), QPointF(pp.right(), y + 0.5f));
 195 }
 196
 197 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 198 {
 199         using pv::widgets::ColourButton;
 200
 201         ColourButton *const colour_button = new ColourButton(
 202                 TracePalette::Rows, TracePalette::Cols, parent);
 203         colour_button->set_palette(TracePalette::Colours);
 204         colour_button->set_colour(colour_);
 205         connect(colour_button, SIGNAL(selected(const QColor&)),
 206                 this, SLOT(on_colour_changed(const QColor&)));
 207
 208         form->addRow(tr("Colour"), colour_button);
 209 }
 210
 211 void Trace::create_popup_form()
 212 {
 213         // Clear the layout
 214
 215         // Transfer the layout and the child widgets to a temporary widget
 216         // which then goes out of scope destroying the layout and all the child
 217         // widgets.
 218         if (popup_form_)
 219                 QWidget().setLayout(popup_form_);
 220
 221         // Repopulate the popup
 222         popup_form_ = new QFormLayout(popup_);
 223         popup_->setLayout(popup_form_);
 224         populate_popup_form(popup_, popup_form_);
 225 }
 226
 227 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 228 {
 229         QLineEdit *const name_edit = new QLineEdit(parent);
 230         name_edit->setText(name_);
 231         connect(name_edit, SIGNAL(textChanged(const QString&)),
 232                 this, SLOT(on_text_changed(const QString&)));
 233         form->addRow(tr("Name"), name_edit);
 234
 235         add_colour_option(parent, form);
 236 }
 237
 238 void Trace::on_popup_closed()
 239 {
 240         popup_ = nullptr;
 241         popup_form_ = nullptr;
 242 }
 243
 244 void Trace::on_text_changed(const QString &text)
 245 {
 246         set_name(text);
 247
 248         if (owner_)
 249                 owner_->extents_changed(true, false);
 250 }
 251
 252 void Trace::on_colour_changed(const QColor &colour)
 253 {
 254         set_colour(colour);
 255
 256         if (owner_)
 257                 owner_->row_item_appearance_changed(true, true);
 258 }
 259
 260 } // namespace view
 261 } // namespace pv