Create an "order mode"

Our first major UI "mode" (yes kinda like the modes in emacs) that has
handles to a client side order book api, line and arrow editors, and
interacts with a spawned `emsd` (the EMS daemon actor).

Buncha cleaning and fixes in here for various thingers as well.

piker/_ems.py

@@ -20,12 +20,11 @@ In suit parlance: "Execution management systems"
 """
 from dataclasses import dataclass, field
 from typing import (
-    AsyncIterator, List, Dict, Callable, Tuple,
+    AsyncIterator, Dict, Callable, Tuple,
     Any,
 )
 # import uuid
 
-import pyqtgraph as pg
 import trio
 from trio_typing import TaskStatus
 import tractor
@@ -33,32 +32,59 @@ import tractor
 from . import data
 from .log import get_logger
 from .data._source import Symbol
-from .ui._style import hcolor
 
 
 log = get_logger(__name__)
 
-_to_router: trio.abc.SendChannel = None
+# setup local ui event streaming channels for request/resp
-_from_ui: trio.abc.ReceiveChannel = None
+# streamging with EMS daemon
-_lines = {}
+_to_ems, _from_order_book = trio.open_memory_channel(100)
-
-
-_local_book = {}
 
 
 @dataclass
-class OrderBoi:
+class OrderBook:
-    """'Buy' (client ?) side order book ctl and tracking.
+    """Buy-side (client-side ?) order book ctl and tracking.
 
-    Mostly for keeping local state to match the EMS and use
+    A style similar to "model-view" is used here where this api is
-    events to trigger graphics updates.
+    provided as a supervised control for an EMS actor which does all the
+    hard/fast work of talking to brokers/exchanges to conduct
+    executions.
+
+    Currently, mostly for keeping local state to match the EMS and use
+    received events to trigger graphics updates.
 
     """
-    orders: Dict[str, dict] = field(default_factory=dict)
+    _sent_orders: Dict[str, dict] = field(default_factory=dict)
-    _cmds_from_ui: trio.abc.ReceiveChannel = _from_ui
+    _confirmed_orders: Dict[str, dict] = field(default_factory=dict)
 
-    async def alert(self, price: float) -> str:
+    _to_ems: trio.abc.SendChannel = _to_ems
-        ...
+    _from_order_book: trio.abc.ReceiveChannel = _from_order_book
+
+    def on_fill(self, uuid: str) -> None:
+        cmd = self._sent_orders[uuid]
+        log.info(f"Order executed: {cmd}")
+        self._confirmed_orders[uuid] = cmd
+
+    def alert(
+        self,
+        uuid: str,
+        symbol: 'Symbol',
+        price: float
+    ) -> str:
+        # XXX: should make this an explicit attr
+        # it's assigned inside ``.add_plot()``
+        # lc = self.view.linked_charts
+
+        # uid = str(uuid.uuid4())
+        cmd = {
+            'msg': 'alert',
+            'price': price,
+            'symbol': symbol.key,
+            'brokers': symbol.brokers,
+            'oid': uuid,
+        }
+        self._sent_orders[uuid] = cmd
+        self._to_ems.send_nowait(cmd)
 
     async def buy(self, price: float) -> str:
         ...
@@ -66,21 +92,34 @@ class OrderBoi:
     async def sell(self, price: float) -> str:
         ...
 
+    async def cancel(self, oid: str) -> bool:
+        """Cancel an order (or alert) from the EMS.
+
+        """
+        ...
+
+    # higher level operations
+
+    async def transmit_to_broker(self, price: float) -> str:
+        ...
+
     async def modify(self, oid: str, price) -> bool:
         ...
 
-    async def cancel(self, oid: str) -> bool:
+
-        ...
+_orders: OrderBook = None
 
 
-_orders: OrderBoi = None
+def get_orders(emsd_uid: Tuple[str, str] = None) -> OrderBook:
 
+    if emsd_uid is not None:
+        # TODO: read in target emsd's active book on startup
+        pass
 
-def get_orders() -> OrderBoi:
     global _orders
 
     if _orders is None:
-        _orders = OrderBoi
+        _orders = OrderBook()
 
     return _orders
 
@@ -91,48 +130,44 @@ async def send_order_cmds():
     to downstream consumers.
 
     This is run in the UI actor (usually the one running Qt).
-    The UI simply delivers order messages to the above ``_to_router``
+    The UI simply delivers order messages to the above ``_to_ems``
     send channel (from sync code using ``.send_nowait()``), these values
     are pulled from the channel here and send to any consumer(s).
 
+    This effectively makes order messages look like they're being
+    "pushed" from the parent to the EMS actor.
+
     """
-    global _from_ui
 
-    async for order in _from_ui:
+    global _from_order_book
+    # book = get_orders()
 
-        lc = order['chart']
+    async for cmd in _from_order_book:
-        symbol = lc.symbol
+
-        tp = order['type']
+        # send msg over IPC / wire
-        price = order['price']
+        log.info(f'sending order cmd: {cmd}')
-        oid = order['oid']
+        yield cmd
+
+        # lc = order['chart']
+        # symbol = order['symol']
+        # msg = order['msg']
+        # price = order['price']
+        # oid = order['oid']
 
-        print(f'oid: {oid}')
         # TODO
         # oid = str(uuid.uuid4())
 
-        cmd = {
+        # cmd = {
-            'price': price,
+        #     'price': price,
-            'action': 'alert',
+        #     'action': 'alert',
-            'symbol': symbol.key,
+        #     'symbol': symbol.key,
-            'brokers': symbol.brokers,
+        #     'brokers': symbol.brokers,
-            'type': tp,
+        #     'msg': msg,
-            'price': price,
+        #     'price': price,
-            'oid': oid,
+        #     'oid': oid,
-        }
+        # }
 
-        _local_book[oid] = cmd
+        # book._sent_orders[oid] = cmd
-
-        yield cmd
-
-
-# streaming tasks which check for conditions per symbol per broker
-_scan_tasks: Dict[str, List] = {}
-
-# levels which have an executable action (eg. alert, order, signal)
-_levels: Dict[str, list] = {}
-
-# up to date last values from target streams
-_last_values: Dict[str, float] = {}
 
 
 # TODO: numba all of this
@@ -146,26 +181,22 @@ def mk_check(trigger_price, known_last) -> Callable[[float, float], bool]:
     avoiding the case where the a predicate returns true immediately.
 
     """
+    # str compares:
+    # https://stackoverflow.com/questions/46708708/compare-strings-in-numba-compiled-function
 
     if trigger_price >= known_last:
 
         def check_gt(price: float) -> bool:
-            if price >= trigger_price:
+            return price >= trigger_price
-                return True
-            else:
-                return False
 
-        return check_gt, 'gt'
+        return check_gt, 'down'
 
     elif trigger_price <= known_last:
 
         def check_lt(price: float) -> bool:
-            if price <= trigger_price:
+            return price <= trigger_price
-                return True
-            else:
-                return False
 
-        return check_lt, 'lt'
+        return check_lt, 'up'
 
 
 @dataclass
@@ -173,9 +204,10 @@ class _ExecBook:
     """EMS-side execution book.
 
     Contains conditions for executions (aka "orders").
-    A singleton instance is created per EMS actor.
+    A singleton instance is created per EMS actor (for now).
 
     """
+    # levels which have an executable action (eg. alert, order, signal)
     orders: Dict[
         Tuple[str, str],
         Tuple[
@@ -188,7 +220,7 @@ class _ExecBook:
         ]
     ] = field(default_factory=dict)
 
-    # most recent values
+    # tracks most recent values per symbol each from data feed
     lasts: Dict[
         Tuple[str, str],
         float
@@ -236,6 +268,11 @@ async def exec_orders(
         with stream.shield():
             async for quotes in stream:
 
+                ##############################
+                # begin price actions sequence
+                # XXX: optimize this for speed
+                ##############################
+
                 for sym, quote in quotes.items():
 
                     execs = book.orders.get((broker, sym))
@@ -249,27 +286,36 @@ async def exec_orders(
                         # update to keep new cmds informed
                         book.lasts[(broker, symbol)] = price
 
-                        # begin price actions sequence
-
                         if not execs:
                             continue
 
-                        for oid, pred, action in tuple(execs):
+                        for oid, pred, name, cmd in tuple(execs):
+
                             # push trigger msg back to parent as an "alert"
                             # (mocking for eg. a "fill")
                             if pred(price):
-                                name = action(price)
+
-                                await ctx.send_yield({
+                                cmd['name'] = name
-                                    'type': 'alert',
+                                cmd['index'] = feed.shm._last.value - 1
-                                    'price': price,
+                                # current shm array index
-                                    # current shm array index
+                                cmd['trigger_price'] = price
-                                    'index': feed.shm._last.value - 1,
+
-                                    'name': name,
+                                await ctx.send_yield(cmd)
-                                    'oid': oid,
+                                # await ctx.send_yield({
-                                })
+                                #     'type': 'alert',
-                                execs.remove((oid, pred, action))
+                                #     'price': price,
+                                #     # current shm array index
+                                #     'index': feed.shm._last.value - 1,
+                                #     'name': name,
+                                #     'oid': oid,
+                                # })
+
                                 print(
                                     f"GOT ALERT FOR {exec_price} @ \n{tick}\n")
+
+                                print(f'removing pred for {oid}')
+                                execs.remove((oid, pred, name, cmd))
+
                                 print(f'execs are {execs}')
 
         # feed teardown
@@ -279,6 +325,10 @@ async def exec_orders(
 async def stream_and_route(ctx, ui_name):
     """Order router (sub)actor entrypoint.
 
+    This is the daemon (child) side routine which starts an EMS
+    runtime per broker/feed and and begins streaming back alerts
+    from executions back to subscribers.
+
     """
     actor = tractor.current_actor()
     book = get_book()
@@ -291,19 +341,18 @@ async def stream_and_route(ctx, ui_name):
 
             async for cmd in await portal.run(send_order_cmds):
 
-                action = cmd.pop('action')
+                msg = cmd['msg']
 
-                if action == 'cancel':
+                if msg == 'cancel':
+                    # TODO:
                     pass
 
-                tp = cmd.pop('type')
-
                 trigger_price = cmd['price']
                 sym = cmd['symbol']
                 brokers = cmd['brokers']
                 oid = cmd['oid']
 
-                if tp == 'alert':
+                if msg == 'alert':
                     log.info(f'Alert {cmd} received in {actor.uid}')
 
                 broker = brokers[0]
@@ -333,14 +382,17 @@ async def stream_and_route(ctx, ui_name):
 
                 # create list of executions on first entry
                 book.orders.setdefault((broker, sym), []).append(
-                    (oid, pred, lambda p: name)
+                    (oid, pred, name, cmd)
                 )
 
+                # ack-respond that order is live
+                await ctx.send_yield({'msg': 'ack', 'oid': oid})
+
             # continue and wait on next order cmd
 
 
 async def spawn_router_stream_alerts(
-    chart,
+    order_mode,
     symbol: Symbol,
     # lines: 'LinesEditor',
     task_status: TaskStatus[str] = trio.TASK_STATUS_IGNORED,
@@ -349,13 +401,11 @@ async def spawn_router_stream_alerts(
     alerts.
 
     """
-    # setup local ui event streaming channels
-    global _from_ui, _to_router, _lines
-    _to_router, _from_ui = trio.open_memory_channel(100)
 
     actor = tractor.current_actor()
-    subactor_name = 'piker.ems'
+    subactor_name = 'emsd'
 
+    # TODO: add ``maybe_spawn_emsd()`` for this
     async with tractor.open_nursery() as n:
 
         portal = await n.start_actor(
@@ -369,32 +419,40 @@ async def spawn_router_stream_alerts(
 
         async with tractor.wait_for_actor(subactor_name):
             # let parent task continue
-            task_status.started(_to_router)
+            task_status.started(_to_ems)
 
+        # begin the trigger-alert stream
+        # this is where we receive **back** messages
+        # about executions **from** the EMS actor
         async for alert in stream:
 
-            yb = pg.mkBrush(hcolor('alert_yellow'))
-
-            angle = 90 if alert['name'] == 'lt' else -90
-
-            arrow = pg.ArrowItem(
-                angle=angle,
-                baseAngle=0,
-                headLen=5,
-                headWidth=2,
-                tailLen=None,
-                brush=yb,
-            )
-            arrow.setPos(alert['index'], alert['price'])
-            chart.plotItem.addItem(arrow)
-
             # delete the line from view
             oid = alert['oid']
-            print(f'_lines: {_lines}')
+            msg_type = alert['msg']
+
+            if msg_type == 'ack':
+                print(f"order accepted: {alert}")
+
+                # show line label once order is live
+                order_mode.lines.commit_line(oid)
+
+                continue
+
+            order_mode.arrows.add(
+                oid,
+                alert['index'],
+                alert['price'],
+                pointing='up' if alert['name'] == 'up' else 'down'
+            )
+
+            # print(f'_lines: {_lines}')
             print(f'deleting line with oid: {oid}')
 
-            chart._vb._lines_editor
+            # delete level from view
-            _lines.pop(oid).delete()
+            order_mode.lines.remove_line(uuid=oid)
+
+            # chart._vb._lines_editor
+            # _lines.pop(oid).delete()
 
             # TODO: this in another task?
             # not sure if this will ever be a bottleneck,
@@ -411,3 +469,6 @@ async def spawn_router_stream_alerts(
                 ],
             )
             log.runtime(result)
+
+            # do we need this?
+            # await _from_ems.put(alert)

piker/ui/_chart.py

@@ -57,7 +57,7 @@ from .. import data
 from ..data import maybe_open_shm_array
 from ..log import get_logger
 from ._exec import run_qtractor, current_screen
-from ._interaction import ChartView
+from ._interaction import ChartView, open_order_mode
 from .. import fsp
 from .._ems import spawn_router_stream_alerts
 
@@ -301,6 +301,7 @@ class LinkedSplitCharts(QtGui.QWidget):
 
             array=array,
             parent=self.splitter,
+            linked_charts=self,
             axisItems={
                 'bottom': xaxis,
                 'right': PriceAxis(linked_charts=self)
@@ -310,9 +311,9 @@ class LinkedSplitCharts(QtGui.QWidget):
             **cpw_kwargs,
         )
 
-        # give viewbox a reference to primary chart
+        # give viewbox as reference to chart
-        # allowing for kb controls and interactions
+        # allowing for kb controls and interactions on **this** widget
-        # (see our custom view in `._interactions.py`)
+        # (see our custom view mode in `._interactions.py`)
         cv.chart = cpw
 
         cpw.plotItem.vb.linked_charts = self
@@ -375,6 +376,7 @@ class ChartPlotWidget(pg.PlotWidget):
         # the data view we generate graphics from
         name: str,
         array: np.ndarray,
+        linked_charts: LinkedSplitCharts,
         static_yrange: Optional[Tuple[float, float]] = None,
         cursor: Optional[Cursor] = None,
         **kwargs,
@@ -390,6 +392,7 @@ class ChartPlotWidget(pg.PlotWidget):
             **kwargs
         )
         self.name = name
+        self._lc = linked_charts
 
         # self.setViewportMargins(0, 0, 0, 0)
         self._ohlc = array  # readonly view of ohlc data
@@ -934,17 +937,6 @@ async def _async_main(
                 wap_in_history,
             )
 
-            # spawn EMS actor-service
-            router_send_chan = await n.start(
-                spawn_router_stream_alerts,
-                chart,
-                symbol,
-            )
-
-            # wait for router to come up before setting
-            # enabling send channel on chart
-            linked_charts._to_router = router_send_chan
-
             # wait for a first quote before we start any update tasks
             quote = await feed.receive()
 
@@ -958,8 +950,26 @@ async def _async_main(
                 linked_charts
             )
 
-            # probably where we'll eventually start the user input loop
+            async with open_order_mode(
-            await trio.sleep_forever()
+                chart,
+            ) as order_mode:
+
+                # TODO: this should probably be implicitly spawned
+                # inside the above mngr?
+
+                # spawn EMS actor-service
+                to_ems_chan = await n.start(
+                    spawn_router_stream_alerts,
+                    order_mode,
+                    symbol,
+                )
+
+                # wait for router to come up before setting
+                # enabling send channel on chart
+                linked_charts._to_ems = to_ems_chan
+
+                # probably where we'll eventually start the user input loop
+                await trio.sleep_forever()
 
 
 async def chart_from_quotes(
@@ -1019,7 +1029,7 @@ async def chart_from_quotes(
         chart,
         # determine precision/decimal lengths
         digits=max(float_digits(last), 2),
-        size_digits=min(float_digits(volume), 3)
+        size_digits=min(float_digits(last), 3)
     )
 
     # TODO:

piker/ui/_graphics/_lines.py

@@ -157,7 +157,7 @@ class L1Labels:
         self,
         chart: 'ChartPlotWidget',  # noqa
         digits: int = 2,
-        size_digits: int = 0,
+        size_digits: int = 3,
         font_size_inches: float = _down_2_font_inches_we_like,
     ) -> None:
 

piker/ui/_interaction.py

@@ -17,8 +17,9 @@
 """
 UX interaction customs.
 """
+from contextlib import asynccontextmanager
 from dataclasses import dataclass, field
-from typing import Optional
+from typing import Optional, Dict, Callable
 import uuid
 
 import pyqtgraph as pg
@@ -29,7 +30,7 @@ import numpy as np
 from ..log import get_logger
 from ._style import _min_points_to_show, hcolor, _font
 from ._graphics._lines import level_line, LevelLine
-from .._ems import _lines
+from .._ems import get_orders, OrderBook
 
 
 log = get_logger(__name__)
@@ -198,10 +199,17 @@ class SelectRect(QtGui.QGraphicsRectItem):
         self.hide()
 
 
+# global store of order-lines graphics
+# keyed by uuid4 strs - used to sync draw
+# order lines **after** the order is 100%
+# active in emsd
+_order_lines: Dict[str, LevelLine] = {}
+
+
 @dataclass
 class LineEditor:
     view: 'ChartView'
-    _lines: field(default_factory=dict)
+    _order_lines: field(default_factory=_order_lines)
     chart: 'ChartPlotWidget' = None  # type: ignore # noqa
     _active_staged_line: LevelLine = None
     _stage_line: LevelLine = None
@@ -223,6 +231,7 @@ class LineEditor:
             line = level_line(
                 chart,
                 level=y,
+                digits=chart._lc.symbol.digits(),
                 color=color,
 
                 # don't highlight the "staging" line
@@ -264,46 +273,48 @@ class LineEditor:
             self._stage_line.hide()
             self._stage_line.label.hide()
 
-        # if line:
-        #     line.delete()
-
         self._active_staged_line = None
 
         # show the crosshair y line
         hl = cursor.graphics[chart]['hl']
         hl.show()
 
-    def commit_line(self) -> LevelLine:
+    def create_line(self, uuid: str) -> LevelLine:
+
         line = self._active_staged_line
-        if line:
+        if not line:
-            chart = self.chart._cursor.active_plot
+            raise RuntimeError("No line commit is currently staged!?")
 
-            y = chart._cursor._datum_xy[1]
+        chart = self.chart._cursor.active_plot
+        y = chart._cursor._datum_xy[1]
 
-            # XXX: should make this an explicit attr
+        line = level_line(
-            # it's assigned inside ``.add_plot()``
+            chart,
-            lc = self.view.linked_charts
+            level=y,
+            color='alert_yellow',
+            digits=chart._lc.symbol.digits(),
+            show_label=False,
+        )
 
-            oid = str(uuid.uuid4())
+        # register for later lookup/deletion
-            lc._to_router.send_nowait({
+        self._order_lines[uuid] = line
-                'chart': lc,
+        return line, y
-                'type': 'alert',
-                'price': y,
-                'oid': oid,
-                # 'symbol': lc.chart.name,
-                # 'brokers': lc.symbol.brokers,
-                # 'price': y,
-            })
 
-            line = level_line(
+    def commit_line(self, uuid: str) -> LevelLine:
-                chart,
+        """Commit a "staged line" to view.
-                level=y,
-                color='alert_yellow',
-            )
-            # register for later
-            _lines[oid] = line
 
-            log.debug(f'clicked y: {y}')
+        Submits the line graphic under the cursor as a (new) permanent
+        graphic in view.
+
+        """
+        line = self._order_lines[uuid]
+        line.label.show()
+
+        # TODO: other flashy things to indicate the order is active
+
+        log.debug(f'Level active for level: {line.value()}')
+
+        return line
 
     def remove_line(
         self,
@@ -316,18 +327,114 @@ class LineEditor:
         cursor position.
 
         """
-        # Delete any hoverable under the cursor
-        cursor = self.chart._cursor
-
         if line:
+            # If line is passed delete it
             line.delete()
+
+        elif uuid:
+            # try to look up line from our registry
+            self._order_lines.pop(uuid).delete()
+
         else:
+            # Delete any hoverable under the cursor
+            cursor = self.chart._cursor
+
             for item in cursor._hovered:
                 # hovered items must also offer
                 # a ``.delete()`` method
                 item.delete()
 
 
+@dataclass
+class ArrowEditor:
+
+    chart: 'ChartPlotWidget'  # noqa
+    _arrows: field(default_factory=dict)
+
+    def add(
+        self,
+        uid: str,
+        x: float,
+        y: float,
+        color='default',
+        pointing: str = 'up',
+    ) -> pg.ArrowItem:
+        """Add an arrow graphic to view at given (x, y).
+
+        """
+        yb = pg.mkBrush(hcolor('alert_yellow'))
+
+        angle = 90 if pointing == 'up' else -90
+
+        arrow = pg.ArrowItem(
+            angle=angle,
+            baseAngle=0,
+            headLen=5,
+            headWidth=2,
+            tailLen=None,
+            brush=yb,
+        )
+        arrow.setPos(x, y)
+
+        self._arrows[uid] = arrow
+
+        # render to view
+        self.chart.plotItem.addItem(arrow)
+
+        return arrow
+
+    def remove(self, arrow) -> bool:
+        self.chart.plotItem.removeItem(arrow)
+
+
+@dataclass
+class OrderMode:
+    """Major mode for placing orders on a chart view.
+
+    """
+    chart: 'ChartPlotWidget'
+    book: OrderBook
+    lines: LineEditor
+    arrows: ArrowEditor
+
+    key_map: Dict[str, Callable] = field(default_factory=dict)
+
+    def uuid(self) -> str:
+        return str(uuid.uuid4())
+
+
+@asynccontextmanager
+async def open_order_mode(
+    chart,
+):
+    # global _order_lines
+
+    view = chart._vb
+    book = get_orders()
+    lines = LineEditor(view=view, _order_lines=_order_lines, chart=chart)
+    arrows = ArrowEditor(chart, {})
+
+    log.info("Opening order mode")
+
+    mode = OrderMode(chart, book, lines, arrows)
+    view.mode = mode
+
+    # # setup local ui event streaming channels for request/resp
+    # # streamging with EMS daemon
+    # global _to_ems, _from_order_book
+    # _to_ems, _from_order_book = trio.open_memory_channel(100)
+
+    try:
+        yield mode
+
+    finally:
+        # XXX special teardown handling like for ex.
+        # - cancelling orders if needed?
+        # - closing positions if desired?
+        # - switching special condition orders to safer/more reliable variants
+        log.info("Closing order mode")
+
+
 class ChartView(ViewBox):
     """Price chart view box with interaction behaviors you'd expect from
     any interactive platform:
@@ -336,6 +443,7 @@ class ChartView(ViewBox):
         - vertical scrolling on y-axis
         - zoom on x to most recent in view datum
         - zoom on right-click-n-drag to cursor position
+
     """
     def __init__(
         self,
@@ -350,9 +458,11 @@ class ChartView(ViewBox):
         self.addItem(self.select_box, ignoreBounds=True)
         self._chart: 'ChartPlotWidget' = None  # noqa
 
-        self._lines_editor = LineEditor(view=self, _lines=_lines)
+        # self._lines_editor = LineEditor(view=self, _lines=_lines)
+        self.mode = None
+
+        # kb ctrls processing
         self._key_buffer = []
-        self._active_staged_line: LevelLine = None  # noqa
 
     @property
     def chart(self) -> 'ChartPlotWidget':  # type: ignore # noqa
@@ -362,7 +472,7 @@ class ChartView(ViewBox):
     def chart(self, chart: 'ChartPlotWidget') -> None:  # type: ignore # noqa
         self._chart = chart
         self.select_box.chart = chart
-        self._lines_editor.chart = chart
+        # self._lines_editor.chart = chart
 
     def wheelEvent(self, ev, axis=None):
         """Override "center-point" location for scrolling.
@@ -533,8 +643,27 @@ class ChartView(ViewBox):
 
             ev.accept()
 
-            # commit the "staged" line under the cursor
+            # self._lines_editor.commit_line()
-            self._lines_editor.commit_line()
+
+            # send order to EMS
+
+            # register the "staged" line under the cursor
+            # to be displayed when above order ack arrives
+            # (means the line graphic doesn't show on screen until the
+            # order is live in the emsd).
+            mode = self.mode
+            uuid = mode.uuid()
+
+            # make line graphic
+            line, y = mode.lines.create_line(uuid)
+
+            # send order cmd to ems
+            mode.book.alert(
+                uuid=uuid,
+                symbol=mode.chart._lc._symbol,
+                price=y
+            )
+
 
     def keyReleaseEvent(self, ev):
         """
@@ -557,7 +686,8 @@ class ChartView(ViewBox):
 
         if text == 'a':
             # draw "staged" line under cursor position
-            self._lines_editor.unstage_line()
+            # self._lines_editor.unstage_line()
+            self.mode.lines.unstage_line()
 
     def keyPressEvent(self, ev):
         """
@@ -580,12 +710,11 @@ class ChartView(ViewBox):
 
         # ctl
         if mods == QtCore.Qt.ControlModifier:
-            # print("CTRL")
             # TODO: ctrl-c as cancel?
             # https://forum.qt.io/topic/532/how-to-catch-ctrl-c-on-a-widget/9
             # if ev.text() == 'c':
             #     self.rbScaleBox.hide()
-            pass
+            print(f"CTRL + key:{key} + text:{text}")
 
         # alt
         if mods == QtCore.Qt.AltModifier:
@@ -603,13 +732,16 @@ class ChartView(ViewBox):
 
         elif text == 'a':
             # add a line at the current cursor
-            self._lines_editor.stage_line()
+            # self._lines_editor.stage_line()
+            self.mode.lines.stage_line()
 
         elif text == 'd':
             # delete any lines under the cursor
-            self._lines_editor.remove_line()
+            # self._lines_editor.remove_line()
+            self.mode.lines.remove_line()
 
-        # Leaving this for light reference purposes
+        # XXX: Leaving this for light reference purposes, there
+        # seems to be some work to at least gawk at for history mgmt.
 
         # Key presses are used only when mouse mode is RectMode
         # The following events are implemented: