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Fix wave out of viewport issue at osc mode

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This commit is contained in:
DreamSourceLab 2020-04-03 11:41:57 +08:00
parent c6bdd0e5ed
commit 10e3fefd13
1 changed files with 7 additions and 2 deletions
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9
DSView/pv/view/dsosignal.cpp
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@ -1055,13 +1055,18 @@ void DsoSignal::paint_trace(QPainter &p,
for (int64_t sample = 0; sample < sample_end; sample+=num_channels) {
value = samples[sample];
const float y = min(max(top, zeroY + (value - hw_offset) * _scale), bottom);
if (x > get_view_rect().right()) {
point--;
const float lastY = point->y() + (y - point->y()) / (x - point->x()) * (get_view_rect().right() - point->x());
point++;
*point++ = QPointF(get_view_rect().right(), lastY);
break;
}
*point++ = QPointF(x, y);
x += pixels_per_sample;
}
p.drawPolyline(points, point - points);
p.eraseRect(get_view_rect().right()+1, get_view_rect().top(),
_view->viewport()->width() - get_view_rect().width(), get_view_rect().height());
delete[] points;
}