#include "ruler.hpp"
#include "view.hpp"
-#include <pv/util.hpp>
-
using namespace Qt;
using std::shared_ptr;
namespace pv {
namespace view {
-const float Ruler::RulerHeight = 2.5f; // x Text Height
+const float Ruler::RulerHeight = 2.5f; // x Text Height
const int Ruler::MinorTickSubdivision = 4;
-const float Ruler::HoverArrowSize = 0.5f; // x Text Height
+const float Ruler::HoverArrowSize = 0.5f; // x Text Height
Ruler::Ruler(View &parent) :
MarginWidget(parent)
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
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());
void Ruler::paintEvent(QPaintEvent*)
{
- const int ValueMargin = 3;
-
- QPainter p(this);
- p.setRenderHint(QPainter::Antialiasing);
-
- const double tick_period = view_.tick_period();
- const unsigned int prefix = view_.tick_prefix();
-
- // Draw the tick marks
- p.setPen(palette().color(foregroundRole()));
-
- const double minor_tick_period = tick_period / MinorTickSubdivision;
- const double first_major_division =
- floor(view_.offset() / tick_period);
- const double first_minor_division =
- ceil(view_.offset() / minor_tick_period);
- const double t0 = first_major_division * tick_period;
+ 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);
+ }
- int division = (int)round(first_minor_division -
- first_major_division * MinorTickSubdivision) - 1;
+ 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;
- double x;
+ QPainter p(this);
- do {
- const double t = t0 + division * minor_tick_period;
- x = (t - view_.offset()) / view_.scale();
-
- if (division % MinorTickSubdivision == 0)
- {
- // Draw a major tick
- p.drawText(x, ValueMargin, 0, text_height,
- AlignCenter | AlignTop | TextDontClip,
- util::format_time(t, prefix, view_.time_unit()));
- p.drawLine(QPointF(x, major_tick_y1),
- QPointF(x, ruler_height));
- }
- else
- {
- // Draw a minor tick
- p.drawLine(QPointF(x, minor_tick_y1),
- QPointF(x, ruler_height));
- }
+ // Draw the tick marks
+ p.setPen(palette().color(foregroundRole()));
- division++;
+ 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));
+ }
- } while (x < width());
+ 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.
}
}
-void Ruler::mouseDoubleClickEvent(QMouseEvent *e)
+Ruler::TickPositions Ruler::calculate_tick_positions(
+ const pv::util::Timestamp& major_period,
+ const pv::util::Timestamp& offset,
+ const double scale,
+ const int width,
+ std::function<QString(const pv::util::Timestamp&)> format_function)
{
- view_.add_flag(view_.offset() + ((double)e->x() + 0.5) * view_.scale());
+ 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)
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 view
} // namespace pv
projects / pulseview.git / blobdiff