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Make `.default_view()` time step aware 

When we use an epoch index and any sample rate > 1s we need to scale the
"number of bars" to that step in order to place the view correctly in
x-domain terms. For now we're calcing the step in-method but likely,
longer run, we'll pull this from elsewhere (like a ``Viz`` attr).
epoch_indexing_and_dataviz_layer
Tyler Goodlet 2022-12-05 10:07:12 -05:00
parent 0bdb7261d1
commit bb84715bf0
1 changed files with 18 additions and 15 deletions
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33
piker/ui/_chart.py
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@ -1026,20 +1026,13 @@ class ChartPlotWidget(pg.PlotWidget):
index_field = viz.index_field index_field = viz.index_field
if index_field == 'time': if index_field == 'time':
vr = viz.plot.viewRect()
vtl, vtr = vr.left(), vr.right()
if vtl < datum_start:
vtl = datum_start
vtr = datum_stop
( (
abs_slc, abs_slc,
read_slc, read_slc,
) = slice_from_time( ) = slice_from_time(
array, array,
start_t=vtl, start_t=l,
stop_t=vtr, stop_t=r,
) )
iv_arr = array[read_slc] iv_arr = array[read_slc]
index = iv_arr['time'] index = iv_arr['time']
@ -1049,16 +1042,20 @@ class ChartPlotWidget(pg.PlotWidget):
# these must be array-index-ints (hence the slice from time # these must be array-index-ints (hence the slice from time
# above). # above).
x_start, x_stop = index[0], index[-1] x_stop = index[-1]
view: ChartView = viz.plot.vb view: ChartView = viz.plot.vb
times = viz.shm.array['time']
step = times[-1] - times[-2]
if ( if (
datum_stop < 0 datum_stop < 0
or l < x_start or r < datum_start
or l > datum_stop
or l < 0 or l < 0
or (datum_stop - datum_start) < 6 or (datum_stop - datum_start) < 6
): ):
begin = x_stop - bars_from_y begin = x_stop - (bars_from_y * step)
view.setXRange( view.setXRange(
min=begin, min=begin,
max=x_stop, max=x_stop,
@ -1067,6 +1064,12 @@ class ChartPlotWidget(pg.PlotWidget):
# re-get range # re-get range
l, datum_start, datum_stop, r = viz.bars_range() l, datum_start, datum_stop, r = viz.bars_range()
# print(
# f'l: {l}\n'
# f'datum_start: {datum_start}\n'
# f'datum_stop: {datum_stop}\n\n'
# f'r: {r}\n'
# )
# we get the L1 spread label "length" in view coords # we get the L1 spread label "length" in view coords
# terms now that we've scaled either by user control # terms now that we've scaled either by user control
# or to the default set of bars as per the immediate block # or to the default set of bars as per the immediate block
@ -1085,15 +1088,15 @@ class ChartPlotWidget(pg.PlotWidget):
) )
else: else:
end = x_stop + y_offset + 1 end = x_stop + (y_offset * step) + 1
begin = end - (r - l) begin = end - (r - l)
debug_msg += ( debug_msg += (
f'end: {end}\n'
f'begin: {begin}\n' f'begin: {begin}\n'
f'end: {end}\n'
) )
print(debug_msg) # print(debug_msg)
# remove any custom user yrange setttings # remove any custom user yrange setttings
if self._static_yrange == 'axis': if self._static_yrange == 'axis':