View: Fully integrate the "zero trigger time" setting
[pulseview.git] / pv / views / trace / 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 using std::pair;
39 using std::shared_ptr;
40
41 namespace pv {
42 namespace views {
43 namespace trace {
44
45 const QPen Trace::AxisPen(QColor(0, 0, 0, 30 * 256 / 100));
46 const int Trace::LabelHitPadding = 2;
47
48 const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10 * 255 / 100);
49 const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15 * 255 / 100);
50
51 Trace::Trace(shared_ptr<data::SignalBase> channel) :
52         base_(channel),
53         axis_pen_(AxisPen),
54         segment_display_mode_(ShowLastSegmentOnly),  // Will be overwritten by View
55         current_segment_(0),
56         popup_(nullptr),
57         popup_form_(nullptr)
58 {
59         connect(channel.get(), SIGNAL(name_changed(const QString&)),
60                 this, SLOT(on_name_changed(const QString&)));
61         connect(channel.get(), SIGNAL(colour_changed(const QColor&)),
62                 this, SLOT(on_colour_changed(const QColor&)));
63 }
64
65 shared_ptr<data::SignalBase> Trace::base() const
66 {
67         return base_;
68 }
69
70 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
71 {
72         const int y = get_visual_y();
73
74         p.setBrush(base_->colour());
75
76         if (!enabled())
77                 return;
78
79         const QRectF r = label_rect(rect);
80
81         // When selected, move the arrow to the left so that the border can show
82         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
83
84         // Paint the label
85         const float label_arrow_length = r.height() / 2;
86         QPointF points[] = {
87                 offs + r.topLeft(),
88                 offs + QPointF(r.right() - label_arrow_length, r.top()),
89                 offs + QPointF(r.right(), y),
90                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
91                 offs + r.bottomLeft()
92         };
93         QPointF highlight_points[] = {
94                 offs + QPointF(r.left() + 1, r.top() + 1),
95                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
96                 offs + QPointF(r.right() - 1, y),
97                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
98                 offs + QPointF(r.left() + 1, r.bottom() - 1)
99         };
100
101         if (selected()) {
102                 p.setPen(highlight_pen());
103                 p.setBrush(Qt::transparent);
104                 p.drawPolygon(points, countof(points));
105         }
106
107         p.setPen(Qt::transparent);
108         p.setBrush(hover ? base_->colour().lighter() : base_->colour());
109         p.drawPolygon(points, countof(points));
110
111         p.setPen(base_->colour().lighter());
112         p.setBrush(Qt::transparent);
113         p.drawPolygon(highlight_points, countof(highlight_points));
114
115         p.setPen(base_->colour().darker());
116         p.setBrush(Qt::transparent);
117         p.drawPolygon(points, countof(points));
118
119         // Paint the text
120         p.setPen(select_text_colour(base_->colour()));
121         p.setFont(QApplication::font());
122         p.drawText(QRectF(r.x(), r.y(),
123                 r.width() - label_arrow_length, r.height()),
124                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
125 }
126
127 QMenu* Trace::create_context_menu(QWidget *parent)
128 {
129         QMenu *const menu = ViewItem::create_context_menu(parent);
130
131         return menu;
132 }
133
134 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
135 {
136         using pv::widgets::Popup;
137
138         popup_ = new Popup(parent);
139         popup_->set_position(parent->mapToGlobal(
140                 drag_point(parent->rect())), Popup::Right);
141
142         create_popup_form();
143
144         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
145
146         return popup_;
147 }
148
149 QRectF Trace::label_rect(const QRectF &rect) const
150 {
151         QFontMetrics m(QApplication::font());
152         const QSize text_size(
153                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
154         const QSizeF label_size(
155                 text_size.width() + LabelPadding.width() * 2,
156                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
157         const float half_height = label_size.height() / 2;
158         return QRectF(
159                 rect.right() - half_height - label_size.width() - 0.5,
160                 get_visual_y() + 0.5f - half_height,
161                 label_size.width() + half_height,
162                 label_size.height());
163 }
164
165 void Trace::set_current_segment(const int segment)
166 {
167         current_segment_ = segment;
168 }
169
170 int Trace::get_current_segment() const
171 {
172         return current_segment_;
173 }
174
175 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
176 {
177         const View *view = owner_->view();
178         assert(view);
179
180         if (view->coloured_bg())
181                 p.setBrush(base_->bgcolour());
182         else
183                 p.setBrush(pp.next_bg_colour_state() ? BrightGrayBGColour : DarkGrayBGColour);
184
185         p.setPen(QPen(Qt::NoPen));
186
187         const pair<int, int> extents = v_extents();
188         p.drawRect(pp.left(), get_visual_y() + extents.first,
189                 pp.width(), extents.second - extents.first);
190 }
191
192 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
193 {
194         p.setRenderHint(QPainter::Antialiasing, false);
195
196         p.setPen(axis_pen_);
197         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
198
199         p.setRenderHint(QPainter::Antialiasing, true);
200 }
201
202 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
203 {
204         using pv::widgets::ColourButton;
205
206         ColourButton *const colour_button = new ColourButton(
207                 TracePalette::Rows, TracePalette::Cols, parent);
208         colour_button->set_palette(TracePalette::Colours);
209         colour_button->set_colour(base_->colour());
210         connect(colour_button, SIGNAL(selected(const QColor&)),
211                 this, SLOT(on_colouredit_changed(const QColor&)));
212
213         form->addRow(tr("Colour"), colour_button);
214 }
215
216 void Trace::create_popup_form()
217 {
218         // Clear the layout
219
220         // Transfer the layout and the child widgets to a temporary widget
221         // which we delete after the event was handled. This way, the layout
222         // and all widgets contained therein are deleted after the event was
223         // handled, leaving the parent popup_ time to handle the change.
224         if (popup_form_) {
225                 QWidget *suicidal = new QWidget();
226                 suicidal->setLayout(popup_form_);
227                 suicidal->deleteLater();
228         }
229
230         // Repopulate the popup
231         popup_form_ = new QFormLayout(popup_);
232         popup_->setLayout(popup_form_);
233         populate_popup_form(popup_, popup_form_);
234 }
235
236 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
237 {
238         QLineEdit *const name_edit = new QLineEdit(parent);
239         name_edit->setText(base_->name());
240         connect(name_edit, SIGNAL(textChanged(const QString&)),
241                 this, SLOT(on_nameedit_changed(const QString&)));
242         form->addRow(tr("Name"), name_edit);
243
244         add_colour_option(parent, form);
245 }
246
247 void Trace::set_name(QString name)
248 {
249         base_->set_name(name);
250 }
251
252 void Trace::set_colour(QColor colour)
253 {
254         base_->set_colour(colour);
255 }
256
257 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
258 {
259         segment_display_mode_ = mode;
260
261         if (owner_)
262                 owner_->row_item_appearance_changed(true, true);
263 }
264
265 void Trace::on_name_changed(const QString &text)
266 {
267         /* This event handler is called by SignalBase when the name was changed there */
268         (void)text;
269
270         if (owner_) {
271                 owner_->extents_changed(true, false);
272                 owner_->row_item_appearance_changed(true, false);
273         }
274 }
275
276 void Trace::on_colour_changed(const QColor &colour)
277 {
278         /* This event handler is called by SignalBase when the colour was changed there */
279         (void)colour;
280
281         if (owner_)
282                 owner_->row_item_appearance_changed(true, true);
283 }
284
285 void Trace::on_popup_closed()
286 {
287         popup_ = nullptr;
288         popup_form_ = nullptr;
289 }
290
291 void Trace::on_nameedit_changed(const QString &name)
292 {
293         /* This event handler notifies SignalBase that the name changed */
294         set_name(name);
295 }
296
297 void Trace::on_colouredit_changed(const QColor &colour)
298 {
299         /* This event handler notifies SignalBase that the colour changed */
300         set_colour(colour);
301 }
302
303 } // namespace trace
304 } // namespace views
305 } // namespace pv