Use step size to determine last datum bar gap
parent
a33f58a61a
commit
58b36db2e5
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@ -51,7 +51,7 @@ log = get_logger(__name__)
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def bar_from_ohlc_row(
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row: np.ndarray,
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# 0.5 is no overlap between arms, 1.0 is full overlap
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w: float = 0.43
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bar_gap: float = 0.43
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) -> tuple[QLineF]:
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'''
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@ -59,8 +59,7 @@ def bar_from_ohlc_row(
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OHLC "bar" for use in the "last datum" of a series.
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'''
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open, high, low, close, index = row #[fields]
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# ['open', 'high', 'low', 'close', 'index']]
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open, high, low, close, index = row
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# TODO: maybe consider using `QGraphicsLineItem` ??
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# gives us a ``.boundingRect()`` on the objects which may make
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@ -81,10 +80,10 @@ def bar_from_ohlc_row(
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# the index's range according to the view mapping coordinates.
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# open line
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o = QLineF(index - w, open, index, open)
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o = QLineF(index - bar_gap, open, index, open)
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# close line
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c = QLineF(index, close, index + w, close)
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c = QLineF(index, close, index + bar_gap, close)
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return [hl, o, c]
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@ -239,9 +238,13 @@ class BarItems(pg.GraphicsObject):
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# if times[-1] - times[-2]:
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# breakpoint()
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index = src_data[index_field]
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step_size = index[-1] - index[-2]
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# generate new lines objects for updatable "current bar"
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self._last_bar_lines = bar_from_ohlc_row(
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last_row,
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bar_gap=step_size * 0.43
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# fields,
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)
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