X-Git-Url: http://git.code-monkey.de/?a=blobdiff_plain;f=pv%2Fview%2Fdecode%2Fannotation.cpp;h=0cf5bad0dd3f074d429102a644caea80fc8230bd;hb=1ae79b11b6b409aae986e379f9280115395c8cf5;hp=4d9a048357bbe1ea7054edeb0dd64388d5217833;hpb=3195aeb6a867b6ab54b4a410182467f63f9b79f2;p=pulseview.git

diff --git a/pv/view/decode/annotation.cpp b/pv/view/decode/annotation.cpp
index 4d9a048..0cf5bad 100644
--- a/pv/view/decode/annotation.cpp
+++ b/pv/view/decode/annotation.cpp
@@ -22,6 +22,12 @@ extern "C" {
 #include <libsigrokdecode/libsigrokdecode.h>
 }
 
+#include <extdef.h>
+
+#include <algorithm>
+
+#include <QPainter>
+
 #include "annotation.h"
 
 using namespace boost;
@@ -31,6 +37,8 @@ namespace pv {
 namespace view {
 namespace decode {
 
+const double Annotation::EndCapWidth = 5;
+
 Annotation::Annotation(const srd_proto_data *const pdata) :
 	_start_sample(pdata->start_sample),
 	_end_sample(pdata->end_sample)
@@ -42,6 +50,47 @@ Annotation::Annotation(const srd_proto_data *const pdata) :
 	}
 }
 
+void Annotation::paint(QPainter &p, QColor fill, QColor outline,
+	QColor text_color, int text_height, int left, int right,
+	double samples_per_pixel, double pixels_offset, int y)
+{
+	const int h = (text_height * 3) / 2;
+
+	const double start = _start_sample / samples_per_pixel -
+		pixels_offset;
+	const double end = _end_sample / samples_per_pixel -
+		pixels_offset;
+
+	if (start > right || end < left)
+		return;
+
+	const double cap_width = min((end - start) / 2, EndCapWidth);
+
+	QPointF pts[] = {
+		QPointF(start, y + .5f),
+		QPointF(start + cap_width, y + .5f - h / 2),
+		QPointF(end - cap_width, y + .5f - h / 2),
+		QPointF(end, y + .5f),
+		QPointF(end - cap_width, y + .5f + h / 2),
+		QPointF(start + cap_width, y + .5f + h / 2)
+	};
+
+	p.setPen(outline);
+	p.setBrush(fill);
+	p.drawConvexPolygon(pts, countof(pts));
+
+	if (!_annotations.empty())
+	{
+		QRectF rect(start + cap_width, y - h / 2,
+			end - start - cap_width * 2, h);
+		p.setPen(text_color);
+		p.drawText(rect, Qt::AlignCenter,
+			p.fontMetrics().elidedText(
+				_annotations.front(), Qt::ElideRight,
+				rect.width()));
+	}
+}
+
 } // namespace decode
 } // namespace view
 } // namespace pv