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Skip base metrics on no basis

bar_select
Tyler Goodlet 2020-12-16 16:26:52 -05:00
parent af61611801
commit 49699a16ff
1 changed files with 10 additions and 4 deletions
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8
piker/ui/_interaction.py
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@ -142,6 +142,7 @@ class SelectRect(QtGui.QGraphicsRectItem):
y1, y2 = start_pos.y(), end_pos.y() y1, y2 = start_pos.y(), end_pos.y()
x1, x2 = start_pos.x(), end_pos.x() x1, x2 = start_pos.x(), end_pos.x()
# TODO: heh, could probably use a max-min streamin algo here too # TODO: heh, could probably use a max-min streamin algo here too
ymn, xmn = min(y1, y2), min(x1, x2) ymn, xmn = min(y1, y2), min(x1, x2)
ymx, xmx = max(y1, y2), max(x1, x2) ymx, xmx = max(y1, y2), max(x1, x2)
@ -151,10 +152,15 @@ class SelectRect(QtGui.QGraphicsRectItem):
ixmn, ixmx = round(xmn), round(xmx) ixmn, ixmx = round(xmn), round(xmx)
nbars = ixmx - ixmn + 1 nbars = ixmx - ixmn + 1
data = self._chart._array[ixmn:ixmx]
data = self._chart._ohlc[ixmn:ixmx]
if len(data):
std = data['close'].std() std = data['close'].std()
dmx = data['high'].max() dmx = data['high'].max()
dmn = data['low'].min() dmn = data['low'].min()
else:
dmn = dmx = std = np.nan
# update label info # update label info
self._label.setText('\n'.join(self._contents).format( self._label.setText('\n'.join(self._contents).format(