Commit Graph

3188 Commits (epoch_indexing_and_dataviz_layer)

Author SHA1 Message Date
Tyler Goodlet 340045af77 Make `FlowGraphic.x_last()` be optionally `None`
In the case where the last-datum-graphic hasn't been created yet, simply
return a `None` from this method so the caller can choose to ignore the
output. Further, drop `.px_width()` since it makes more sense defined on
`Viz` as well as the previously commented `BarItems.x_uppx()` method.
Also, don't round the `.x_uppx()` output since it can then be used when
< 1 to do x-domain scaling during high zoom usage.
2023-02-12 13:55:26 -05:00
Tyler Goodlet c1988c4d8d Add a parent-type for graphics: `FlowGraphic`
Factor some common methods into the parent type:
- `.x_uppx()` for reading the horizontal units-per-pixel.
- `.x_last()` for reading the "closest to y-axis" last datum coordinate
  for zooming "around" during mouse interaction.
- `.px_width()` for computing the max width of any curve in view in
  pixels.

Adjust all previous derived `pg.GraphicsObject` child types to now
inherit from this new parent and in particular enable proper `.x_uppx()`
support to `BarItems`.
2023-02-12 13:55:26 -05:00
Tyler Goodlet 6a0c36922e Drop `._index_step` from formatters and instead defer to `Viz.index_step()` 2023-02-12 13:55:26 -05:00
Tyler Goodlet 459cbfdbad Further fixes `Viz.default_view()` and `.index_step()`
Use proper uppx scaling when either of scaling the data to the x-domain
index-range or when the uppx is < 1 (now that we support it) such that
both the fast and slow chart always appropriately scale and offset to
the y-axis with the last datum graphic just adjacent to the order line
arrow markers.

Further this fixes the `.index_step()` calc to use the "earliest" 16
values to compute the expected sample step diff since the last set often
contained gaps due to start up race conditions and generated
unexpected/incorrect output.

Further this drops the `.curve_width_pxs()` method and replaces it with
`.px_width()`, taken from the graphics object API and instead returns
the pixel account for the whole view width instead of the
x-domain-data-range within the view.
2023-02-12 13:55:26 -05:00
Tyler Goodlet fc17187ff4 Drop edge case from `slice_from_time()`
Doesn't seem like we really need to handle the situation where the start
or stop input time stamps are outside the index range of the data since
the new binary search handling via `numpy.searchsorted()` covers this
case at minimal runtime cost and with an equally correct output. Allows
us to drop some other indexing endpoint internal variables as well.
2023-02-12 13:55:26 -05:00
Tyler Goodlet a7d78a3f40 Use left-style index search on RHS scan as well 2023-02-12 13:55:26 -05:00
Tyler Goodlet 7ce3f10e73 Just-offset-from-arrow-marker on slow chart
We want the fast and slow chart to behave the same on calls to
`Viz.default_view()` so adjust the offset calc to make both work:
- just offset by the line len regardless of step / uppx
- add back the `should_line: bool` output from `render_bar_items()` (and
  use it to set a new `ds_allowed: bool` guard variable) so that we can
  bypass calling the m4 downsampler unless the bars have been switched
  to the interpolation line graphic (which we normally required before
  any downsampling of OHLC graphics data).

Further, this drops use of the `use_vr: bool` flag from all rendering
since we pretty much always use it by default.
2023-02-12 13:55:26 -05:00
Tyler Goodlet bfc6014ad3 Fix history array name 2023-02-12 13:55:26 -05:00
Tyler Goodlet a5eed8fc1e Fix x-axis labelling when using an epoch domain
Previously with array-int indexing we had to map the input x-domain
"indexes" passed to `DynamicDateAxis._indexes_to_timestr()`. In the
epoch-time indexing case we obviously don't need to lookup time stamps
from the underlying shm array and can instead just cast to `int` and
relay the values verbatim.

Further, this patch includes some style adjustments to `AxisLabel` to
better enable multi-feed chart overlays by avoiding L1 label clutter
when multiple y-axes are stacked adjacent:
- adjust the `Axis` typical max string to include a couple spaces suffix
 providing for a bit more margin between side-by-side y-axes.
- make the default label (fill) color the "default" from the global
 color scheme and drop it's opacity to .9
- add some new label placement options and use them in the
 `.boundingRect()` method:
 * `._x/y_br_offset` for relatively shifting the overall label relative
   to it's parent axis.
 * `._y_txt_h_scaling` for increasing the bounding rect's height
   without including more whitespace in the label's text content.
- ensure labels have a high z-value such that by default they are always
 placed "on top" such that when we adjust the l1 labels they can be set
 to a lower value and thus never obscure the last-price label.
2023-02-12 13:55:26 -05:00
Tyler Goodlet cdec4782f0 Add commented append slice-len sanity check 2023-02-12 13:55:26 -05:00
Tyler Goodlet f30a48b82c Use `np.diff()` on last 16 samples instead of only last datum pair 2023-02-12 13:55:26 -05:00
Tyler Goodlet 98de22a740 Enable the experimental `QPrivatePath` functionality from latest `pyqtgraph` 2023-02-12 13:55:26 -05:00
Tyler Goodlet efbb8e86d4 Fix overlayed slow chart "treading"
Turns out we were updating the wrong ``Viz``/``DisplayState`` inside the
closure style `increment_history_view()`` (probably due to looping
through the flumes and dynamically closing in that task-func).. Instead
define the history incrementer at module level and pass in the
`DisplayState` explicitly. Further rework the `DisplayState` attrs to be
more focused around the `Viz` associated with the fast and slow chart
and be sure to adjust output from each `Viz.incr_info()` call to latest
update. Oh, and just tweaked the line palette for the moment.

FYI "treading" here is referring to  the x-shifting of the curve when
the last datum is in view such that on new sampled appends the "last"
datum is kept in the same x-location in UI terms.
2023-02-12 13:55:26 -05:00
Tyler Goodlet b6521498f4 Make `.increment_view()` take in a `datums: int` and always scale it by sample step size 2023-02-12 13:55:26 -05:00
Tyler Goodlet 06f1b94147 Make `Viz.incr_info()` do treading with time-index, and appending with array-index 2023-02-12 13:55:26 -05:00
Tyler Goodlet ffb57f0256 Rename `reset` -> `reset_cache` 2023-02-12 13:55:26 -05:00
Tyler Goodlet ed1f64cf43 Fix gap detection on RHS; always bin-search on overshot time range 2023-02-12 13:55:26 -05:00
Tyler Goodlet bf8ea33697 Add type annots to vars inside `Render.render()` 2023-02-12 13:55:26 -05:00
Tyler Goodlet bc17308de7 Drop coordinate cacheing from `BarItems`, causes weird jitter on pan 2023-02-12 13:55:26 -05:00
Tyler Goodlet 1ece704d6e Add `ChartPlotWidget.main_viz: Viz` convenience `@property` 2023-02-12 13:55:26 -05:00
Tyler Goodlet dea1c1c2d6 Make `Viz.incr_info()` sample rate agnostic
Mainly it was the global (should we )increment logic that needs to be
independent for the fast vs. slow chart such that the slow isn't
update-shifted by the fast and vice versa. We do this using a new
`'i_last_slow'` key in the `DisplayState.globalz: dict` which is
singleton for each sample-rate-specific chart and works for both time
and array indexing.

Also, we drop some old commented `graphics.draw_last_datum()` code that
never ended up being needed again inside the coordinate cache reset
bloc.
2023-02-12 13:55:26 -05:00
Tyler Goodlet 3300a240c6 Use array-`int`-indexing on single feed
Might as well since it makes the chart look less gappy and we can easily
flip the index switch now B)

Also adds a new `'i_slow_last'` key to `DisplayState` for a singleton
across all slow charts and thus no more need for special case logic in
`viz.incr_info()`.
2023-02-12 13:55:26 -05:00
Tyler Goodlet 50ef4efccb Align step curves the same as OHLC bars 2023-02-12 13:55:26 -05:00
Tyler Goodlet 51f2461e8b Add `IncrementalFormatter.x_offset: np.ndarray`
Define the x-domain coords "offset" (determining the curve graphics
per-datum placement) for each formatter such that there's only on place
to change it when needed. Obviously each graphics type has it's own
dimensionality and this is reflected by the array shapes on each
subtype.
2023-02-12 13:55:26 -05:00
Tyler Goodlet 444768d30f Adjust OHLC bar x-offsets to be time span matched
Previously we were drawing with the middle of the bar on each index with
arms to either side: +/- some arm length. Instead this changes so that
each bar is drawn *after* each index/timestamp such that in graphics
coords the bar span more correctly matches the time span in the
x-domain. This makes the linked region between slow and fast chart
directly match (without any transform) for epoch-time indexing such that
the last x-coord in view on the fast chart is no more then the
next time step in (downsampled) slow view.

Deats:
- adjust in `._pathops.path_arrays_from_ohlc()` and take an `bar_w` bar
  width input (normally taken from the data step size).
- change `.ui._ohlc.bar_from_ohlc_row()` and
  `BarItems.draw_last_datum()` to match.
2023-02-12 13:55:26 -05:00
Tyler Goodlet 0d0675ac7e `Viz._index_field` a `typing.Literal[str]` 2023-02-12 13:55:26 -05:00
Tyler Goodlet 24b384f3ef Set `path_arrays_from_ohlc(use_time_index=True)` on epoch indexing
Allows easily switching between normal array `int` indexing and time
indexing by just flipping the `Viz._index_field: str`.

Also, guard all the x-data audit breakpoints with a time indexing
condition.
2023-02-12 13:55:26 -05:00
Tyler Goodlet 93330954c2 Ugh, use `bool` flag to determine index field.. 2023-02-12 13:55:26 -05:00
Tyler Goodlet edf721f755 Make `LinearRegion` link using epoch-time index
Turned out to be super simple to get the first draft to work since the
fast and slow chart now use the same domain, however, it seems like
maybe there's an offset issue still where the fast may be a couple
minutes ahead of the slow?

Need to dig in a bit..
2023-02-12 13:55:26 -05:00
Tyler Goodlet 530b2731ba Add global `i_step` per overlay to `DisplayState`
Using a global "last index step" (via module var) obviously has problems
when working with multiple feed sets in a single global app instance:
any separate feed-set will be incremented according to an app-global
index-step and thus won't correctly calc per-feed-set-step update info.

Impl deatz:
- drop `DisplayState.incr_info()` (since previously moved to `Viz`) and
  call that method on each appropriate `Viz` instance where necessary;
  further ensure the appropriate `DisplayState` instance is passed in to
  each call and make sure to pass a `state: DisplayState`.
- add `DisplayState.hist_vars: dict` for history chart (sets) to
  determine the per-feed (not set) current slow chart (time) step.
- add `DisplayState.globalz: dict` to house a common per-feed-set state
  and use it inside the new `Viz.incr_info()` such that
  a `should_increment: bool` can be returned and used by the display
  loop to determine whether to x-shift the current chart.
2023-02-12 13:55:24 -05:00
Tyler Goodlet 14104185d2 Move `DisplayState.incr_info()` -> `Viz` 2023-02-12 13:41:18 -05:00
Tyler Goodlet 3019c35e30 Move `Viz` layer to new `.ui` mod 2023-02-12 13:41:18 -05:00
Tyler Goodlet 4d74bc29b4 Fix line -> bars on 6x UPPX
Read the `Viz.index_step()` directly to avoid always reading 1 on the
slow chart; this was completely broken before and resulting in not
rendering the bars graphic on the slow chart until at a true uppx of
1 which obviously doesn't work for 60 width bars XD

Further cleanups to `._render` module:
- drop `array` output from `Renderer.render()`, `read_from_key` input
  and fix type annot.
- drop `should_line`, `changed_to_line` and `render_kwargs` from
  `render_baritems()` outputs and instead calc `should_redraw` logic
  inside the func body and return as output.
2023-02-12 13:41:18 -05:00
Tyler Goodlet 3638ae8d3e Drop unused `read_src_from_key: bool` to `.format_to_1d()` 2023-02-12 13:41:18 -05:00
Tyler Goodlet c5dd67e63c Right, do index lookup for int-index as well.. 2023-02-12 13:41:18 -05:00
Tyler Goodlet 0663880a6d Fix formatter xy ndarray first prepend case
First allocation vs. first "prepend" of source data to an xy `ndarray`
format **must be mutex** in order to avoid a double prepend.

Previously when both blocks were executed we'd end up with
a `.xy_nd_start` that was decremented (at least) twice as much as it
should be on the first `.format_to_1d()` call which is obviously
incorrect (and causes problems for m4 downsampling as discussed below).
Further, since the underlying `ShmArray` buffer indexing is managed
(i.e. write-updated) completely independently from the incremental
formatter updates and internal xy indexing, we can't use
`ShmArray._first.value` and instead need to use the particular `.diff()`
output's prepend length value to decrement the `.xy_nd_start` on updates
after initial alloc.

Problems this resolves with m4:
- m4 uses a x-domain diff to calculate the number of "frames" to
  downsample to, this is normally based on the ratio of pixel columns on
  screen vs. the size of the input xy data.
- previously using an int-index (not epoch time) the max diff between
  first and last index would be the size of the input buffer and thus
  would never cause a large mem allocation issue (though it may have
  been inefficient in terms of needed size).
- with an epoch time index this max diff could explode if you had some
  near-now epoch time stamp **minus** an x-allocation value: generally
  some value in `[0.5, -0.5]` which would result in a massive frames and
  thus internal `np.ndarray()` allocation causing either a crash in
  `numba` code or actual system mem over allocation.

Further, put in some more x value checks that trigger breakpoints if we
detect values that caused this issue - we'll remove em after this has
been tested enough.
2023-02-12 13:41:18 -05:00
Tyler Goodlet 3bed142d15 Handle time-indexing for fill arrows
Call into a reworked `Flume.get_index()` for both the slow and fast
chart and do time index clipping to last datum where necessary.
2023-02-12 13:41:18 -05:00
Tyler Goodlet 9fcc6f9c44 Restore coord-cache resetting
Turns out we can't seem to avoid the artefacts when click-drag-scrolling
(results in weird repeated "smeared" curve segments) so just go back to
the original code.
2023-02-12 13:41:18 -05:00
Tyler Goodlet 7aef31701b Add some commented debug prints for default fmtr 2023-02-12 13:41:18 -05:00
Tyler Goodlet 135627e142 Slicec to an extra index around each timestamp input 2023-02-12 13:41:18 -05:00
Tyler Goodlet 5216a6b732 Drop passing `render_data` to `Curve.draw_last_datum()` 2023-02-12 13:41:18 -05:00
Tyler Goodlet 2a797d32dc Add back `.default_view()` slice logic for `int` indexing 2023-02-12 13:41:18 -05:00
Tyler Goodlet 35a16ded2d Block out `do_print` stuff inside `Viz.maxmin()` 2023-02-12 13:41:18 -05:00
Tyler Goodlet 44f50e3d0e Implement `stop_t` gap adjustments; the good lord said it is the problem 2023-02-12 13:41:18 -05:00
Tyler Goodlet 96b871c4d7 Draw last datums on boot
Ensures that a "last datum" graphics object exists so that zooming can
read it using `.x_last()`. Also, disable the linked region stuff for now
since it's totally borked after flipping to the time indexing.
2023-02-12 13:41:18 -05:00
Tyler Goodlet d2aad74dfc Delegate to `Viz.default_view()` on chart
Also add a rage print to not forget about the global index
tracking/diffing in the display loop we still need to change.
2023-02-12 13:41:18 -05:00
Tyler Goodlet 50209752c3 Re-implement `.default_view()` on `Viz`
Since we don't really need it defined on the "chart widget" move it to
a viz method and rework it to hell:

- always discard the invalid view l > r case.
- use the graphic's UPPX to determine UI-to-scene coordinate scaling for
  the L1-label collision detection, if there is no L1 just offset by
  a few (index step scaled) datums; this allows us to drop the 2x
  x-range calls as was hacked previous.
- handle no-data-in-view cases explicitly and error if we get any
  ostensibly impossible cases.
- expect caller to trigger a graphics cycle if needed.

Further support this includes a rework a slew of other important
details:

- add `Viz.index_step`, an idempotent computed, index (presumably uniform)
  step value which is needed for variable sample rate graphics displayed
  on an epoch (second) time index.
- rework `Viz.datums_range()` to pass view x-endpoints as first and last
  elements in return `tuple`; tighten up snap-to-data edge case logic
  using `max()`/`min()` calls and better internal var naming.
- adjust all calls to `slice_from_time()` to not expect an "abs" slice.
- drop all `.yrange` resetting since we can just have the `Renderer` do
  it when necessary.
2023-02-12 13:41:18 -05:00
Tyler Goodlet 5ab4e5493e Add gap detection for `stop_t`, though only report atm 2023-02-12 13:41:18 -05:00
Tyler Goodlet e252f70253 Add `.x_last()` meth to flow graphics 2023-02-12 13:41:18 -05:00
Tyler Goodlet 98438e29ef Drop `Flume.view_data()` 2023-02-12 13:41:18 -05:00