Simplify drawing for zoomed out annotations

[pulseview.git] / pv / view / decode / annotation.cpp

diff --git a/pv/view/decode/annotation.cpp b/pv/view/decode/annotation.cpp
index a2db331d4f2d0c466f0a0772435b0261ca9b1324..3a0a51fda26adc24605d2f55eb3ade98a3fd2e56 100644 (file)
--- a/pv/view/decode/annotation.cpp
+++ b/pv/view/decode/annotation.cpp
@@ -110,19 +110,30 @@ void Annotation::draw_instant(QPainter &p, QColor fill, QColor outline,
 void Annotation::draw_range(QPainter &p, QColor fill, QColor outline,
        QColor text_color, int h, double start, double end, int y)
 {
+       const double top = y + .5 - h / 2;
+       const double bottom = y + .5 + h / 2;
+
+       p.setPen(outline);
+       p.setBrush(fill);
+
+       // If the two ends are within 1 pixel, draw a vertical line
+       if (start + 1.0 > end)
+       {
+               p.drawLine(QPointF(start, top), QPointF(start, bottom));
+               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(start + cap_width, top),
+               QPointF(end - cap_width, top),
                QPointF(end, y + .5f),
-               QPointF(end - cap_width, y + .5f + h / 2),
-               QPointF(start + cap_width, y + .5f + h / 2)
+               QPointF(end - cap_width, bottom),
+               QPointF(start + cap_width, bottom)
        };
 
-       p.setPen(outline);
-       p.setBrush(fill);
        p.drawConvexPolygon(pts, countof(pts));
 
        if (_annotations.empty())