Use emplace_back() where possible.
[pulseview.git] / 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, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include <extdef.h>
21
22 #include <cassert>
23 #include <cmath>
24
25 #include <QApplication>
26 #include <QFormLayout>
27 #include <QKeyEvent>
28 #include <QLineEdit>
29
30 #include "trace.hpp"
31 #include "tracepalette.hpp"
32 #include "view.hpp"
33
34 #include "pv/globalsettings.hpp"
35 #include "pv/widgets/colourbutton.hpp"
36 #include "pv/widgets/popup.hpp"
37
38 namespace pv {
39 namespace views {
40 namespace TraceView {
41
42 const QPen Trace::AxisPen(QColor(0, 0, 0, 30*256/100));
43 const int Trace::LabelHitPadding = 2;
44
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(std::shared_ptr<data::SignalBase> channel) :
49         base_(channel),
50         popup_(nullptr),
51         popup_form_(nullptr)
52 {
53         GlobalSettings settings;
54         coloured_bg_ = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
55
56         connect(channel.get(), SIGNAL(name_changed(const QString&)),
57                 this, SLOT(on_name_changed(const QString&)));
58         connect(channel.get(), SIGNAL(colour_changed(const QColor&)),
59                 this, SLOT(on_colour_changed(const QColor&)));
60 }
61
62 void Trace::set_coloured_bg(bool state)
63 {
64         coloured_bg_ = state;
65 }
66
67 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
68 {
69         const int y = get_visual_y();
70
71         p.setBrush(base_->colour());
72
73         if (!enabled())
74                 return;
75
76         const QRectF r = label_rect(rect);
77
78         // Paint the label
79         const float label_arrow_length = r.height() / 2;
80         const QPointF points[] = {
81                 r.topLeft(),
82                 QPointF(r.right() - label_arrow_length, r.top()),
83                 QPointF(r.right(), y),
84                 QPointF(r.right() - label_arrow_length, r.bottom()),
85                 r.bottomLeft()
86         };
87         const QPointF highlight_points[] = {
88                 QPointF(r.left() + 1, r.top() + 1),
89                 QPointF(r.right() - label_arrow_length, r.top() + 1),
90                 QPointF(r.right() - 1, y),
91                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
92                 QPointF(r.left() + 1, r.bottom() - 1)
93         };
94
95         if (selected()) {
96                 p.setPen(highlight_pen());
97                 p.setBrush(Qt::transparent);
98                 p.drawPolygon(points, countof(points));
99         }
100
101         p.setPen(Qt::transparent);
102         p.setBrush(hover ? base_->colour().lighter() : base_->colour());
103         p.drawPolygon(points, countof(points));
104
105         p.setPen(base_->colour().lighter());
106         p.setBrush(Qt::transparent);
107         p.drawPolygon(highlight_points, countof(highlight_points));
108
109         p.setPen(base_->colour().darker());
110         p.setBrush(Qt::transparent);
111         p.drawPolygon(points, countof(points));
112
113         // Paint the text
114         p.setPen(select_text_colour(base_->colour()));
115         p.setFont(QApplication::font());
116         p.drawText(QRectF(r.x(), r.y(),
117                 r.width() - label_arrow_length, r.height()),
118                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
119 }
120
121 QMenu* Trace::create_context_menu(QWidget *parent)
122 {
123         QMenu *const menu = ViewItem::create_context_menu(parent);
124
125         return menu;
126 }
127
128 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
129 {
130         using pv::widgets::Popup;
131
132         popup_ = new Popup(parent);
133         popup_->set_position(parent->mapToGlobal(
134                 point(parent->rect())), Popup::Right);
135
136         create_popup_form();
137
138         connect(popup_, SIGNAL(closed()),
139                 this, SLOT(on_popup_closed()));
140
141         return popup_;
142 }
143
144 QRectF Trace::label_rect(const QRectF &rect) const
145 {
146         QFontMetrics m(QApplication::font());
147         const QSize text_size(
148                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
149         const QSizeF label_size(
150                 text_size.width() + LabelPadding.width() * 2,
151                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
152         const float half_height = label_size.height() / 2;
153         return QRectF(
154                 rect.right() - half_height - label_size.width() - 0.5,
155                 get_visual_y() + 0.5f - half_height,
156                 label_size.width() + half_height,
157                 label_size.height());
158 }
159
160 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
161 {
162         if (coloured_bg_)
163                 p.setBrush(base_->bgcolour());
164         else
165                 p.setBrush(bgcolour_state_ ? BrightGrayBGColour : DarkGrayBGColour);
166
167         p.setPen(QPen(Qt::NoPen));
168
169         const std::pair<int, int> extents = v_extents();
170
171         const int x = 0;
172         const int y = get_visual_y() + extents.first;
173         const int w = pp.right() - pp.left();
174         const int h = extents.second - extents.first;
175
176         p.drawRect(x, y, w, h);
177 }
178
179 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
180 {
181         p.setRenderHint(QPainter::Antialiasing, false);
182
183         p.setPen(AxisPen);
184         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
185
186         p.setRenderHint(QPainter::Antialiasing, true);
187 }
188
189 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
190 {
191         using pv::widgets::ColourButton;
192
193         ColourButton *const colour_button = new ColourButton(
194                 TracePalette::Rows, TracePalette::Cols, parent);
195         colour_button->set_palette(TracePalette::Colours);
196         colour_button->set_colour(base_->colour());
197         connect(colour_button, SIGNAL(selected(const QColor&)),
198                 this, SLOT(on_colouredit_changed(const QColor&)));
199
200         form->addRow(tr("Colour"), colour_button);
201 }
202
203 void Trace::create_popup_form()
204 {
205         // Clear the layout
206
207         // Transfer the layout and the child widgets to a temporary widget
208         // which we delete after the event was handled. This way, the layout
209         // and all widgets contained therein are deleted after the event was
210         // handled, leaving the parent popup_ time to handle the change.
211         if (popup_form_) {
212                 QWidget *suicidal = new QWidget();
213                 suicidal->setLayout(popup_form_);
214                 suicidal->deleteLater();
215         }
216
217         // Repopulate the popup
218         popup_form_ = new QFormLayout(popup_);
219         popup_->setLayout(popup_form_);
220         populate_popup_form(popup_, popup_form_);
221 }
222
223 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
224 {
225         QLineEdit *const name_edit = new QLineEdit(parent);
226         name_edit->setText(base_->name());
227         connect(name_edit, SIGNAL(textChanged(const QString&)),
228                 this, SLOT(on_nameedit_changed(const QString&)));
229         form->addRow(tr("Name"), name_edit);
230
231         add_colour_option(parent, form);
232 }
233
234 void Trace::set_name(QString name)
235 {
236         base_->set_name(name);
237 }
238
239 void Trace::set_colour(QColor colour)
240 {
241         base_->set_colour(colour);
242 }
243
244 void Trace::on_name_changed(const QString &text)
245 {
246         /* This event handler is called by SignalBase when the name was changed there */
247         (void)text;
248
249         if (owner_) {
250                 owner_->extents_changed(true, false);
251                 owner_->row_item_appearance_changed(true, false);
252         }
253 }
254
255 void Trace::on_colour_changed(const QColor &colour)
256 {
257         /* This event handler is called by SignalBase when the colour was changed there */
258         (void)colour;
259
260         if (owner_)
261                 owner_->row_item_appearance_changed(true, true);
262 }
263
264 void Trace::on_popup_closed()
265 {
266         popup_ = nullptr;
267         popup_form_ = nullptr;
268 }
269
270 void Trace::on_nameedit_changed(const QString &name)
271 {
272         /* This event handler notifies SignalBase that the name changed */
273         set_name(name);
274 }
275
276 void Trace::on_colouredit_changed(const QColor &colour)
277 {
278         /* This event handler notifies SignalBase that the colour changed */
279         set_colour(colour);
280 }
281
282 } // namespace TraceView
283 } // namespace views
284 } // namespace pv