Finally get chart startup view-state kinda correct

It ended up being what'd you expect, races on the accessing shm buffer
data by the UI during the whole "mega-async-startup-everything" phase XD

So we add the following list of ad-hoc startup steps:
- do `.default_view()` on the slow chart after the fast chart is mostly
  fully spawned with the intention being to capture the state where the
  historical buffer is mostly loaded before sizing the view to the
  graphical form of the data.
- resize slow chart sidepanes from the fast chart just before sleeping
  forever (and after order mode has booted).

piker/ui/_display.py

@@ -851,13 +851,6 @@ async def display_symbol_data(
         rt_linked = godwidget.rt_linked
         rt_linked._symbol = symbol
 
-        # generate order mode side-pane UI
-        # A ``FieldsForm`` form to configure order entry
-        pp_pane: FieldsForm = mk_order_pane_layout(godwidget)
-
-        # add as next-to-y-axis singleton pane
-        godwidget.pp_pane = pp_pane
-
         # create top history view chart above the "main rt chart".
         hist_linked = godwidget.hist_linked
         hist_linked._symbol = symbol
@@ -872,10 +865,11 @@ async def display_symbol_data(
         # don't show when not focussed
         hist_linked.cursor.always_show_xlabel = False
 
-        hist_chart.default_view(
+        # generate order mode side-pane UI
-            bars_from_y=int(len(hist_ohlcv.array)),  # size to data
+        # A ``FieldsForm`` form to configure order entry
-            y_offset=6116*2,  # push it a little away from the y-axis
+        # and add as next-to-y-axis singleton pane
-        )
+        pp_pane: FieldsForm = mk_order_pane_layout(godwidget)
+        godwidget.pp_pane = pp_pane
 
         # create main OHLC chart
         chart = rt_linked.plot_ohlc_main(
@@ -1020,6 +1014,15 @@ async def display_symbol_data(
 
             # size view to data prior to order mode init
             chart.default_view()
+            rt_linked.graphics_cycle()
+            await trio.sleep(0)
+
+            hist_chart.default_view(
+                bars_from_y=int(len(hist_ohlcv.array)),  # size to data
+                y_offset=6116*2,  # push it a little away from the y-axis
+            )
+            hist_linked.graphics_cycle()
+            await trio.sleep(0)
 
             async with (
                 open_order_mode(
@@ -1040,6 +1043,8 @@ async def display_symbol_data(
                 rt_linked.set_split_sizes()
                 hist_linked.resize_sidepanes(from_linked=rt_linked)
 
+                # TODO: look into this because not sure why it was
+                # commented out / we ever needed it XD
                 # NOTE: we pop the volume chart from the subplots set so
                 # that it isn't double rendered in the display loop
                 # above since we do a maxmin calc on the volume data to
@@ -1050,6 +1055,12 @@ async def display_symbol_data(
                 # close group status
                 sbar._status_groups[loading_sym_key][1]()
 
+                hist_linked.graphics_cycle()
+                await trio.sleep(0)
+                hist_chart.default_view(
+                    bars_from_y=int(len(hist_ohlcv.array)),  # size to data
+                    y_offset=6116*2,  # push it a little away from the y-axis
+                )
+
                 # let the app run.. bby
-                # rt_linked.graphics_cycle()
                 await trio.sleep_forever()

piker/ui/_interaction.py

@@ -142,8 +142,8 @@ async def handle_viewmode_kb_inputs(
                 }
             ):
                 godw = view._chart.linked.godwidget
+                godw.hist_linked.resize_sidepanes(from_linked=godw.rt_linked)
                 godw.search.focus()
-                # godw.hist_linked.resize_sidepanes(from_linked=godw.rt_linked)
 
             # esc and ctrl-c
             if key == Qt.Key_Escape or (ctrl and key == Qt.Key_C):
@@ -181,7 +181,8 @@ async def handle_viewmode_kb_inputs(
             if key in pressed:
                 pressed.remove(key)
 
-        # QUERY/QUOTE MODE #
+        # QUERY/QUOTE MODE
+        # ----------------
         if {Qt.Key_Q}.intersection(pressed):
 
             view.linked.cursor.in_query_mode = True
@@ -191,7 +192,6 @@ async def handle_viewmode_kb_inputs(
 
         # SELECTION MODE
         # --------------
-
         if shift:
             if view.state['mouseMode'] == ViewBox.PanMode:
                 view.setMouseMode(ViewBox.RectMode)
@@ -212,7 +212,6 @@ async def handle_viewmode_kb_inputs(
 
         # ORDER MODE
         # ----------
-
         # live vs. dark trigger + an action {buy, sell, alert}
         order_keys_pressed = ORDER_MODE.intersection(pressed)