Pass labels to form builder, toy with broadcast consumer task

piker/brokers/data.py

@@ -14,9 +14,14 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-"""
-Real-time data feed machinery
-"""
+'''
+NB: this is the old original implementation that was used way way back
+when the project started with ``kivy``.
+
+This code is left for reference but will likely be merged in
+appropriately and removed.
+
+'''
 import time
 from functools import partial
 from dataclasses import dataclass, field

piker/clearing/_client.py

@@ -38,7 +38,7 @@ log = get_logger(__name__)
 
 @dataclass
 class OrderBook:
-    """Buy-side (client-side ?) order book ctl and tracking.
+    '''EMS-client-side order book ctl and tracking.
 
     A style similar to "model-view" is used here where this api is
     provided as a supervised control for an EMS actor which does all the
@@ -48,7 +48,7 @@ class OrderBook:
     Currently, this is mostly for keeping local state to match the EMS
     and use received events to trigger graphics updates.
 
-    """
+    '''
     # mem channels used to relay order requests to the EMS daemon
     _to_ems: trio.abc.SendChannel
     _from_order_book: trio.abc.ReceiveChannel

piker/clearing/_ems.py

@@ -32,9 +32,8 @@ import tractor
 
 from ..log import get_logger
 from ..data._normalize import iterticks
-from ..data.feed import Feed, open_feed
+from ..data.feed import Feed, maybe_open_feed
 from .._daemon import maybe_spawn_brokerd
-from .._cacheables import maybe_open_ctx
 from . import _paper_engine as paper
 from ._messages import (
     Status, Order,
@@ -959,15 +958,11 @@ async def _emsd_main(
 
     # spawn one task per broker feed
     async with (
-        maybe_open_ctx(
-            key=(broker, symbol),
-            mngr=open_feed(
+        maybe_open_feed(
             broker,
             [symbol],
             loglevel=loglevel,
-            ),
-            loglevel=loglevel,
-        ) as feed,
+        ) as (feed, stream),
     ):
 
         # XXX: this should be initial price quote from target provider
@@ -1011,7 +1006,7 @@ async def _emsd_main(
 
                     brokerd_stream,
                     ems_client_order_stream,
-                    feed.stream,
+                    stream,
                     broker,
                     symbol,
                     book

piker/data/_sharedmem.py

@@ -15,7 +15,7 @@
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 """
-NumPy compatible shared memory buffers for real-time FSP.
+NumPy compatible shared memory buffers for real-time IPC streaming.
 
 """
 from dataclasses import dataclass, asdict
@@ -207,11 +207,16 @@ class ShmArray:
     def push(
         self,
         data: np.ndarray,
+
         prepend: bool = False,
+
     ) -> int:
-        """Ring buffer like "push" to append data
+        '''Ring buffer like "push" to append data
         into the buffer and return updated "last" index.
-        """
+
+        NB: no actual ring logic yet to give a "loop around" on overflow
+        condition, lel.
+        '''
         length = len(data)
 
         if prepend:

piker/data/feed.py

@@ -441,7 +441,7 @@ async def open_feed(
     tick_throttle: Optional[float] = None,  # Hz
     shielded_stream: bool = False,
 
-) -> ReceiveChannel[dict[str, Any]]:
+) -> Feed:
     '''
     Open a "data feed" which provides streamed real-time quotes.
 
@@ -522,7 +522,7 @@ async def open_feed(
         feed._max_sample_rate = max(ohlc_sample_rates)
 
         try:
-            yield feed, bstream
+            yield feed
         finally:
             # drop the infinite stream connection
             await ctx.cancel()
@@ -538,7 +538,7 @@ async def maybe_open_feed(
     tick_throttle: Optional[float] = None,  # Hz
     shielded_stream: bool = False,
 
-) -> ReceiveChannel[dict[str, Any]]:
+) -> (Feed, ReceiveChannel[dict[str, Any]]):
     '''Maybe open a data to a ``brokerd`` daemon only if there is no
     local one for the broker-symbol pair, if one is cached use it wrapped
     in a tractor broadcast receiver.
@@ -553,12 +553,12 @@ async def maybe_open_feed(
             [sym],
             loglevel=loglevel,
         ),
-    ) as (cache_hit, (feed, stream)):
+    ) as (cache_hit, feed):
 
         if cache_hit:
             # add a new broadcast subscription for the quote stream
             # if this feed is likely already in use
-            async with stream.subscribe() as bstream:
+            async with feed.stream.subscribe() as bstream:
                 yield feed, bstream
         else:
             yield feed, stream

piker/fsp/__init__.py

@@ -69,6 +69,7 @@ async def fsp_compute(
     ctx: tractor.Context,
     symbol: str,
     feed: Feed,
+    stream: trio.abc.ReceiveChannel,
 
     src: ShmArray,
     dst: ShmArray,
@@ -93,14 +94,14 @@ async def fsp_compute(
         yield {}
 
         # task cancellation won't kill the channel
-        with stream.shield():
+        # since we shielded at the `open_feed()` call
         async for quotes in stream:
             for symbol, quotes in quotes.items():
                 if symbol == sym:
                     yield quotes
 
     out_stream = func(
-        filter_by_sym(symbol, feed.stream),
+        filter_by_sym(symbol, stream),
         feed.shm,
     )
 
@@ -164,7 +165,8 @@ async def cascade(
     dst_shm_token: Tuple[str, np.dtype],
     symbol: str,
     fsp_func_name: str,
-) -> AsyncIterator[dict]:
+
+) -> None:
     """Chain streaming signal processors and deliver output to
     destination mem buf.
 
@@ -175,7 +177,11 @@ async def cascade(
     func: Callable = _fsps[fsp_func_name]
 
     # open a data feed stream with requested broker
-    async with data.open_feed(brokername, [symbol]) as feed:
+    async with data.feed.maybe_open_feed(
+        brokername,
+        [symbol],
+        shielded_stream=True,
+    ) as (feed, stream):
 
         assert src.token == feed.shm.token
 
@@ -186,6 +192,7 @@ async def cascade(
             ctx=ctx,
             symbol=symbol,
             feed=feed,
+            stream=stream,
 
             src=src,
             dst=dst,

piker/ui/_chart.py

@@ -344,9 +344,7 @@ class LinkedSplits(QWidget):
 
     def focus(self) -> None:
         if self.chart is not None:
-            print("FOCUSSING CHART")
             self.chart.focus()
-            # self.chart.parent().show()
 
     def unfocus(self) -> None:
         if self.chart is not None:
@@ -390,8 +388,8 @@ class LinkedSplits(QWidget):
 
         # style?
         self.chart.setFrameStyle(
-            QtWidgets.QFrame.StyledPanel |
-            QtWidgets.QFrame.Plain
+            QFrame.StyledPanel |
+            QFrame.Plain
         )
 
         return self.chart
@@ -1064,7 +1062,7 @@ class ChartPlotWidget(pg.PlotWidget):
         self.scene().leaveEvent(ev)
 
 
-_clear_throttle_rate: int = 35  # Hz
+_clear_throttle_rate: int = 60  # Hz
 _book_throttle_rate: int = 16  # Hz
 
 
@@ -1394,14 +1392,14 @@ async def run_fsp(
             parent=linkedsplits.godwidget,
             fields_schema={
                 'name': {
-                    'key': '**fsp**:',
+                    'label': '**fsp**:',
                     'type': 'select',
                     'default_value': [
                         f'{display_name}'
                     ],
                 },
                 'period': {
-                    'key': '**period**:',
+                    'label': '**period**:',
                     'type': 'edit',
                     'default_value': 14,
                 },
@@ -1637,8 +1635,7 @@ async def display_symbol_data(
     # )
 
     async with(
-
-        data.open_feed(
+        data.feed.open_feed(
             provider,
             [sym],
             loglevel=loglevel,
@@ -1647,8 +1644,21 @@ async def display_symbol_data(
             tick_throttle=_clear_throttle_rate,
 
         ) as feed,
-
+        trio.open_nursery() as n,
     ):
+        async def print_quotes():
+            async with feed.stream.subscribe() as bstream:
+                last_tick = time.time()
+                async for quotes in bstream:
+                    now = time.time()
+                    period = now - last_tick
+                    for sym, quote in quotes.items():
+                        ticks = quote.get('ticks', ())
+                        if ticks:
+                            print(f'{1/period} Hz')
+                            last_tick = time.time()
+
+        n.start_soon(print_quotes)
 
         ohlcv: ShmArray = feed.shm
         bars = ohlcv.array
@@ -1829,6 +1839,8 @@ async def _async_main(
     sbar = godwidget.window.status_bar
     starting_done = sbar.open_status('starting ze sexy chartz')
 
+    # generate order mode side-pane UI
+
     async with (
         trio.open_nursery() as root_n,
 
@@ -1838,7 +1850,6 @@ async def _async_main(
             parent=godwidget,
             fields_schema={
                 'account': {
-                    'key': '**account**:',
                     'type': 'select',
                     'default_value': [
                         'paper',
@@ -1846,8 +1857,8 @@ async def _async_main(
                         # 'ib.paper',
                     ],
                 },
-                'allocator': {
-                    'key': '**allocate**:',
+                'size_unit': {
+                    'label': '**allocate**:',
                     'type': 'select',
                     'default_value': [
                         '$ size',
@@ -1855,18 +1866,17 @@ async def _async_main(
                         '# shares'
                     ],
                 },
-                'disti_policy': {
-                    'key': '**weight**:',
+                'disti_weight': {
+                    'label': '**weight**:',
                     'type': 'select',
                     'default_value': ['uniform'],
                 },
-                'dollar_size': {
-                    'key': '**$size**:',
+                'size': {
+                    'label': '**size**:',
                     'type': 'edit',
-                    'default_value': '5k',
+                    'default_value': 5000,
                 },
                 'slots': {
-                    'key': '**slots**:',
                     'type': 'edit',
                     'default_value': 4,
                 },

piker/ui/_event.py

@@ -25,6 +25,35 @@ from PyQt5 import QtCore
 from PyQt5.QtCore import QEvent
 from PyQt5.QtWidgets import QWidget
 import trio
+from pydantic import BaseModel
+
+
+# TODO: maybe consider some constrained ints down the road?
+# https://pydantic-docs.helpmanual.io/usage/types/#constrained-types
+
+class KeyboardMsg(BaseModel):
+    '''Unpacked Qt keyboard event data.
+
+    '''
+    event: QEvent
+    etype: int
+    key: int
+    mods: int
+    txt: str
+
+    class Config:
+        arbitrary_types_allowed = True
+
+    def to_tuple(self) -> tuple:
+        return tuple(self.dict().values())
+
+
+# TODO: maybe add some methods to detect key combos? Or is that gonna be
+# better with pattern matching?
+# # ctl + alt as combo
+# ctlalt = False
+# if (QtCore.Qt.AltModifier | QtCore.Qt.ControlModifier) == mods:
+#     ctlalt = True
 
 
 class EventRelay(QtCore.QObject):
@@ -67,22 +96,26 @@ class EventRelay(QtCore.QObject):
 
             if etype in {QEvent.KeyPress, QEvent.KeyRelease}:
 
+                msg = KeyboardMsg(
+                    event=ev,
+                    etype=ev.type(),
+                    key=ev.key(),
+                    mods=ev.modifiers(),
+                    txt=ev.text(),
+                )
+
                 # TODO: is there a global setting for this?
                 if ev.isAutoRepeat() and self._filter_auto_repeats:
                     ev.ignore()
                     return True
 
-                key = ev.key()
-                mods = ev.modifiers()
-                txt = ev.text()
-
                 # NOTE: the event object instance coming out
                 # the other side is mutated since Qt resumes event
                 # processing **before** running a ``trio`` guest mode
                 # tick, thus special handling or copying must be done.
 
-                # send elements to async handler
-                self._send_chan.send_nowait((ev, etype, key, mods, txt))
+                # send keyboard msg to async handler
+                self._send_chan.send_nowait(msg)
 
             else:
                 # send event to async handler

piker/ui/_exec.py

@@ -99,6 +99,9 @@ def run_qtractor(
     # "This is substantially faster than using a signal... for some
     # reason Qt signal dispatch is really slow (and relies on events
     # underneath anyway, so this is strictly less work)."
+
+    # source gist and credit to njs:
+    # https://gist.github.com/njsmith/d996e80b700a339e0623f97f48bcf0cb
     REENTER_EVENT = QtCore.QEvent.Type(QtCore.QEvent.registerEventType())
 
     class ReenterEvent(QtCore.QEvent):

piker/ui/_forms.py

@@ -18,6 +18,7 @@
 Text entry "forms" widgets (mostly for configuration and UI user input).
 
 '''
+from __future__ import annotations
 from contextlib import asynccontextmanager
 from functools import partial
 from textwrap import dedent
@@ -153,6 +154,13 @@ class FontScaledDelegate(QStyledItemDelegate):
             return super().sizeHint(option, index)
 
 
+# slew of resources which helped get this where it is:
+# https://stackoverflow.com/questions/20648210/qcombobox-adjusttocontents-changing-height
+# https://stackoverflow.com/questions/3151798/how-do-i-set-the-qcombobox-width-to-fit-the-largest-item
+# https://stackoverflow.com/questions/6337589/qlistwidget-adjust-size-to-content#6370892
+# https://stackoverflow.com/questions/25304267/qt-resize-of-qlistview
+# https://stackoverflow.com/questions/28227406/how-to-set-qlistview-rows-height-permanently
+
 class FieldsForm(QWidget):
 
     godwidget: 'GodWidget'  # noqa
@@ -245,8 +253,6 @@ class FieldsForm(QWidget):
         name: str,
         value: str,
 
-        widget: Optional[QWidget] = None,
-
     ) -> FontAndChartAwareLineEdit:
 
         # TODO: maybe a distint layout per "field" item?
@@ -281,6 +287,7 @@ class FieldsForm(QWidget):
         label = self.add_field_label(name)
 
         select = QComboBox(self)
+        select._key = name
 
         for i, value in enumerate(values):
             select.insertItem(i, str(value))
@@ -330,15 +337,19 @@ async def handle_field_input(
     # last_widget: QWidget,  # had focus prior
     recv_chan: trio.abc.ReceiveChannel,
     fields: FieldsForm,
+    allocator: Allocator,  # noqa
 
 ) -> None:
 
-    async for event, etype, key, mods, txt in recv_chan:
-        print(f'key: {key}, mods: {mods}, txt: {txt}')
+    async for kbmsg in recv_chan:
+
+        if kbmsg.etype in {QEvent.KeyPress, QEvent.KeyRelease}:
+            event, etype, key, mods, txt = kbmsg.to_tuple()
+            print(f'key: {kbmsg.key}, mods: {kbmsg.mods}, txt: {kbmsg.txt}')
 
             # default controls set
             ctl = False
-        if mods == Qt.ControlModifier:
+            if kbmsg.mods == Qt.ControlModifier:
                 ctl = True
 
             if ctl and key in {  # cancel and refocus
@@ -350,9 +361,15 @@ async def handle_field_input(
 
                 widget.clearFocus()
                 fields.godwidget.focus()
-
                 continue
 
+            # process field input
+            if key in (Qt.Key_Enter, Qt.Key_Return):
+                value = widget.text()
+                key = widget._key
+                setattr(allocator, key, value)
+                print(allocator.dict())
+
 
 @asynccontextmanager
 async def open_form(
@@ -360,33 +377,54 @@ async def open_form(
     godwidget: QWidget,
     parent: QWidget,
     fields_schema: dict,
+    # alloc: Allocator,
     # orientation: str = 'horizontal',
 
 ) -> FieldsForm:
 
     fields = FieldsForm(godwidget, parent=parent)
+    from ._position import mk_pp_alloc
+    alloc = mk_pp_alloc()
+    fields.model = alloc
 
     for name, config in fields_schema.items():
         wtype = config['type']
-        key = str(config['key'])
+        label = str(config.get('label', name))
 
         # plain (line) edit field
         if wtype == 'edit':
-            fields.add_edit_field(key, config['default_value'])
+            w = fields.add_edit_field(
+                label,
+                config['default_value']
+            )
 
         # drop-down selection
         elif wtype == 'select':
             values = list(config['default_value'])
-            fields.add_select_field(key, values)
+            w = fields.add_select_field(
+                label,
+                values
+            )
+
+            def write_model(text: str):
+                print(f'{text}')
+                setattr(alloc, name, text)
+
+            w.currentTextChanged.connect(write_model)
+
+        w._key = name
 
     async with open_handlers(
 
         list(fields.fields.values()),
-        event_types={QEvent.KeyPress},
+        event_types={
+            QEvent.KeyPress,
+        },
 
         async_handler=partial(
             handle_field_input,
             fields=fields,
+            allocator=alloc,
         ),
 
         # block key repeats?
@@ -395,7 +433,7 @@ async def open_form(
         yield fields
 
 
-def mk_health_bar(
+def mk_fill_status_bar(
 
     fields: FieldsForm,
     pane_vbox: QVBoxLayout,
@@ -553,7 +591,7 @@ def mk_order_pane_layout(
     # _, h = fields.width(), fields.height()
     # print(f'w, h: {w, h}')
 
-    hbox, bar = mk_health_bar(fields, pane_vbox=vbox)
+    hbox, bar = mk_fill_status_bar(fields, pane_vbox=vbox)
 
     # add pp fill bar + spacing
     vbox.addLayout(hbox, stretch=1/3)

piker/ui/_interaction.py

@@ -64,7 +64,8 @@ async def handle_viewmode_inputs(
         'cc': mode.cancel_all_orders,
     }
 
-    async for event, etype, key, mods, text in recv_chan:
+    async for kbmsg in recv_chan:
+        event, etype, key, mods, text = kbmsg.to_tuple()
         log.debug(f'key: {key}, mods: {mods}, text: {text}')
         now = time.time()
         period = now - last

piker/ui/_lines.py

@@ -204,15 +204,24 @@ class LevelLine(pg.InfiniteLine):
 
     def on_tracked_source(
         self,
+
         x: int,
         y: float
+
     ) -> None:
-        # XXX: this is called by our ``Cursor`` type once this
-        # line is set to track the cursor: for every movement
-        # this callback is invoked to reposition the line
+        '''Chart coordinates cursor tracking callback.
+
+        this is called by our ``Cursor`` type once this line is set to
+        track the cursor: for every movement this callback is invoked to
+        reposition the line
+        '''
         self.movable = True
         self.set_level(y)  # implictly calls reposition handler
 
+        self._chart.linked.godwidget.pp_config.model.get_order_info(
+            price=y
+        )
+
     def mouseDragEvent(self, ev):
         """Override the ``InfiniteLine`` handler since we need more
         detailed control and start end signalling.

piker/ui/_position.py

@@ -45,8 +45,7 @@ from ._style import _font
 
 
 class Position(BaseModel):
-    '''Basic pp (personal position) data representation with attached
-    fills history.
+    '''Basic pp (personal position) model with attached fills history.
 
     This type should be IPC wire ready?
 
@@ -91,6 +90,9 @@ def mk_pp_alloc(
 
     class Allocator(BaseModel):
 
+        class Config:
+            validate_assignment = True
+
         account: Account = None
         _accounts: dict[str, Optional[str]] = accounts
 
@@ -154,11 +156,9 @@ class PositionTracker:
             avg_price=0,
         )
 
-        self.pp_label = None
-
         view = chart.getViewBox()
 
-        # literally 'pp' label that's always in view
+        # literally the 'pp' (pee pee) label that's always in view
         self.pp_label = pp_label = Label(
             view=view,
             fmt_str='pp',

piker/ui/_search.py

@@ -815,7 +815,8 @@ async def handle_keyboard_input(
             )
         )
 
-        async for event, etype, key, mods, txt in recv_chan:
+        async for kbmsg in recv_chan:
+            event, etype, key, mods, txt = kbmsg.to_tuple()
 
             log.debug(f'key: {key}, mods: {mods}, txt: {txt}')
 
@@ -823,11 +824,6 @@ async def handle_keyboard_input(
             if mods == Qt.ControlModifier:
                 ctl = True
 
-            # # ctl + alt as combo
-            # ctlalt = False
-            # if (QtCore.Qt.AltModifier | QtCore.Qt.ControlModifier) == mods:
-            #     ctlalt = True
-
             if key in (Qt.Key_Enter, Qt.Key_Return):
 
                 search.chart_current_item(clear_to_cache=True)

piker/ui/order_mode.py

@@ -413,7 +413,7 @@ async def run_order_mode(
         ),
 
     ):
-        view = chart._vb
+        view = chart.view
         lines = LineEditor(chart=chart)
         arrows = ArrowEditor(chart, {})
 
@@ -431,8 +431,9 @@ async def run_order_mode(
             pp,
         )
 
+        # TODO: create a mode "manager" of sorts?
+        # -> probably just call it "UxModes" err sumthin?
         # so that view handlers can access it
-        mode.pp = pp
         view.mode = mode
 
         asset_type = symbol.type_key