--- /dev/null
+/*
+ * This file is part of the PulseView project.
+ *
+ * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <extdef.h>
+
+#include <QApplication>
+#include <QFontMetrics>
+#include <QMouseEvent>
+
+#include "ruler.hpp"
+#include "view.hpp"
+
+using namespace Qt;
+
+using std::function;
+using std::shared_ptr;
+using std::vector;
+
+namespace pv {
+namespace views {
+namespace trace {
+
+const float Ruler::RulerHeight = 2.5f; // x Text Height
+const int Ruler::MinorTickSubdivision = 4;
+
+const float Ruler::HoverArrowSize = 0.5f; // x Text Height
+
+Ruler::Ruler(View &parent) :
+ MarginWidget(parent)
+{
+ setMouseTracking(true);
+
+ connect(&view_, SIGNAL(hover_point_changed()),
+ this, SLOT(hover_point_changed()));
+ connect(&view_, SIGNAL(offset_changed()),
+ this, SLOT(invalidate_tick_position_cache()));
+ connect(&view_, SIGNAL(scale_changed()),
+ this, SLOT(invalidate_tick_position_cache()));
+ connect(&view_, SIGNAL(tick_prefix_changed()),
+ this, SLOT(invalidate_tick_position_cache()));
+ connect(&view_, SIGNAL(tick_precision_changed()),
+ this, SLOT(invalidate_tick_position_cache()));
+ connect(&view_, SIGNAL(tick_period_changed()),
+ this, SLOT(invalidate_tick_position_cache()));
+ connect(&view_, SIGNAL(time_unit_changed()),
+ this, SLOT(invalidate_tick_position_cache()));
+}
+
+QSize Ruler::sizeHint() const
+{
+ const int text_height = calculate_text_height();
+ return QSize(0, RulerHeight * text_height);
+}
+
+QSize Ruler::extended_size_hint() const
+{
+ QRectF max_rect;
+ vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto &i : items)
+ max_rect = max_rect.united(i->label_rect(QRect()));
+ return QSize(0, sizeHint().height() - max_rect.top() / 2 +
+ ViewItem::HighlightRadius);
+}
+
+QString Ruler::format_time_with_distance(
+ const pv::util::Timestamp& distance,
+ const pv::util::Timestamp& t,
+ pv::util::SIPrefix prefix,
+ pv::util::TimeUnit unit,
+ unsigned precision,
+ bool sign)
+{
+ const unsigned limit = 60;
+
+ if (t.is_zero())
+ return "0";
+
+ // If we have to use samples then we have no alternative formats
+ if (unit == pv::util::TimeUnit::Samples)
+ return pv::util::format_time_si_adjusted(t, prefix, precision, "sa", sign);
+
+ // View zoomed way out -> low precision (0), big distance (>=60s)
+ // -> DD:HH:MM
+ if ((precision == 0) && (distance >= limit))
+ return pv::util::format_time_minutes(t, 0, sign);
+
+ // View in "normal" range -> medium precision, medium step size
+ // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
+ // View zoomed way in -> high precision (>3), low step size (<1s)
+ // -> HH:MM:SS.mmm... or xxxx (si unit) if less than limit seconds
+ if (abs(t) < limit)
+ return pv::util::format_time_si_adjusted(t, prefix, precision, "s", sign);
+ else
+ return pv::util::format_time_minutes(t, precision, sign);
+}
+
+vector< shared_ptr<ViewItem> > Ruler::items()
+{
+ const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
+ return vector< shared_ptr<ViewItem> >(
+ time_items.begin(), time_items.end());
+}
+
+shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
+{
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto i = items.rbegin(); i != items.rend(); i++)
+ if ((*i)->enabled() && (*i)->label_rect(rect()).contains(pt))
+ return *i;
+ return nullptr;
+}
+
+void Ruler::paintEvent(QPaintEvent*)
+{
+ if (!tick_position_cache_) {
+ auto ffunc = [this](const pv::util::Timestamp& t) {
+ return format_time_with_distance(
+ this->view_.tick_period(),
+ t,
+ this->view_.tick_prefix(),
+ this->view_.time_unit(),
+ this->view_.tick_precision());
+ };
+
+ tick_position_cache_ = calculate_tick_positions(
+ view_.tick_period(),
+ view_.offset(),
+ view_.scale(),
+ width(),
+ ffunc);
+ }
+
+ const int ValueMargin = 3;
+
+ const int text_height = calculate_text_height();
+ const int ruler_height = RulerHeight * text_height;
+ const int major_tick_y1 = text_height + ValueMargin * 2;
+ const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;
+
+ QPainter p(this);
+
+ // Draw the tick marks
+ p.setPen(palette().color(foregroundRole()));
+
+ for (const auto& tick: tick_position_cache_->major) {
+ p.drawText(tick.first, ValueMargin, 0, text_height,
+ AlignCenter | AlignTop | TextDontClip, tick.second);
+ p.drawLine(QPointF(tick.first, major_tick_y1),
+ QPointF(tick.first, ruler_height));
+ }
+
+ for (const auto& tick: tick_position_cache_->minor) {
+ p.drawLine(QPointF(tick, minor_tick_y1),
+ QPointF(tick, ruler_height));
+ }
+
+ // Draw the hover mark
+ draw_hover_mark(p, text_height);
+
+ p.setRenderHint(QPainter::Antialiasing);
+
+ // The cursor labels are not drawn with the arrows exactly on the
+ // bottom line of the widget, because then the selection shadow
+ // would be clipped away.
+ const QRect r = rect().adjusted(0, 0, 0, -ViewItem::HighlightRadius);
+
+ // Draw the items
+ const vector< shared_ptr<TimeItem> > items(view_.time_items());
+ for (auto &i : items) {
+ const bool highlight = !item_dragging_ &&
+ i->label_rect(r).contains(mouse_point_);
+ i->paint_label(p, r, highlight);
+ }
+}
+
+Ruler::TickPositions Ruler::calculate_tick_positions(
+ const pv::util::Timestamp& major_period,
+ const pv::util::Timestamp& offset,
+ const double scale,
+ const int width,
+ function<QString(const pv::util::Timestamp&)> format_function)
+{
+ TickPositions tp;
+
+ const pv::util::Timestamp minor_period = major_period / MinorTickSubdivision;
+ const pv::util::Timestamp first_major_division = floor(offset / major_period);
+ const pv::util::Timestamp first_minor_division = ceil(offset / minor_period);
+ const pv::util::Timestamp t0 = first_major_division * major_period;
+
+ int division = (round(first_minor_division -
+ first_major_division * MinorTickSubdivision)).convert_to<int>() - 1;
+
+ double x;
+
+ do {
+ pv::util::Timestamp t = t0 + division * minor_period;
+ x = ((t - offset) / scale).convert_to<double>();
+
+ if (division % MinorTickSubdivision == 0) {
+ // Recalculate 't' without using 'minor_period' which is a fraction
+ t = t0 + division / MinorTickSubdivision * major_period;
+ tp.major.emplace_back(x, format_function(t));
+ } else {
+ tp.minor.emplace_back(x);
+ }
+
+ division++;
+ } while (x < width);
+
+ return tp;
+}
+
+void Ruler::mouseDoubleClickEvent(QMouseEvent *event)
+{
+ view_.add_flag(view_.offset() + ((double)event->x() + 0.5) * view_.scale());
+}
+
+void Ruler::draw_hover_mark(QPainter &p, int text_height)
+{
+ const int x = view_.hover_point().x();
+
+ if (x == -1)
+ return;
+
+ p.setPen(QPen(Qt::NoPen));
+ p.setBrush(QBrush(palette().color(foregroundRole())));
+
+ const int b = RulerHeight * text_height;
+ const float hover_arrow_size = HoverArrowSize * text_height;
+ const QPointF points[] = {
+ QPointF(x, b),
+ QPointF(x - hover_arrow_size, b - hover_arrow_size),
+ QPointF(x + hover_arrow_size, b - hover_arrow_size)
+ };
+ p.drawPolygon(points, countof(points));
+}
+
+int Ruler::calculate_text_height() const
+{
+ return QFontMetrics(font()).ascent();
+}
+
+void Ruler::hover_point_changed()
+{
+ update();
+}
+
+void Ruler::invalidate_tick_position_cache()
+{
+ tick_position_cache_ = boost::none;
+}
+
+void Ruler::resizeEvent(QResizeEvent*)
+{
+ // the tick calculation depends on the width of this widget
+ invalidate_tick_position_cache();
+}
+
+} // namespace trace
+} // namespace views
+} // namespace pv
projects / pulseview.git / blobdiff