X-Git-Url: https://sigrok.org/gitweb/?p=pulseview.git;a=blobdiff_plain;f=pv%2Fview%2Fruler.cpp;h=31ec121d074aa724bd4a67b83c2c4272d233099c;hp=5f7b1f67faade83e7d3acf388e8230d26a7d07fa;hb=520362f8c4082820193f09e43b27a8c7df2ef011;hpb=c677193dc6e691493081fe87476a04e1674093a5

diff --git a/pv/view/ruler.cpp b/pv/view/ruler.cpp
index 5f7b1f67..31ec121d 100644
--- a/pv/view/ruler.cpp
+++ b/pv/view/ruler.cpp
@@ -35,10 +35,10 @@ using std::vector;
 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)
@@ -77,6 +77,38 @@ QSize Ruler::extended_size_hint() 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());
@@ -96,21 +128,21 @@ shared_ptr<ViewItem> Ruler::get_mouse_over_item(const QPoint &pt)
 void Ruler::paintEvent(QPaintEvent*)
 {
 	if (!tick_position_cache_) {
-		auto ffunc = [this](const pv::util::Timestamp& t)
-		{
-			return util::format_time(
+		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_.emplace(calculate_tick_positions(
+		tick_position_cache_ = calculate_tick_positions(
 			view_.tick_period(),
 			view_.offset(),
 			view_.scale(),
 			width(),
-			ffunc));
+			ffunc);
 	}
 
 	const int ValueMargin = 3;
@@ -121,7 +153,6 @@ void Ruler::paintEvent(QPaintEvent*)
 	const int minor_tick_y1 = (major_tick_y1 + ruler_height) / 2;
 
 	QPainter p(this);
-	p.setRenderHint(QPainter::Antialiasing);
 
 	// Draw the tick marks
 	p.setPen(palette().color(foregroundRole()));
@@ -141,6 +172,8 @@ void Ruler::paintEvent(QPaintEvent*)
 	// 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.
@@ -164,8 +197,7 @@ Ruler::TickPositions Ruler::calculate_tick_positions(
 {
 	TickPositions tp;
 
-	const double minor_period =
-		(major_period / MinorTickSubdivision).convert_to<double>();
+	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;
@@ -180,7 +212,7 @@ Ruler::TickPositions Ruler::calculate_tick_positions(
 		x = ((t - offset) / scale).convert_to<double>();
 
 		if (division % MinorTickSubdivision == 0) {
-			// Recalculate 't' without using 'minor_period' which is of type double.
+			// 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 {