Make panning pause feeds, call into update method from downsampler cb loop

big_data_lines
Tyler Goodlet 2022-04-04 00:35:32 -04:00
parent ef03b8e987
commit a9e1c6c50e
1 changed files with 68 additions and 12 deletions

View File

@ -20,6 +20,7 @@ Chart view box primitives
"""
from __future__ import annotations
from contextlib import asynccontextmanager
# import itertools
import time
from typing import Optional, Callable
@ -36,7 +37,7 @@ from ..log import get_logger
from ._style import _min_points_to_show
from ._editors import SelectRect
from . import _event
from ._ohlc import BarItems
# from ._ohlc import BarItems
log = get_logger(__name__)
@ -319,6 +320,7 @@ async def handle_viewmode_mouse(
):
# when in order mode, submit execution
# msg.event.accept()
# breakpoint()
view.order_mode.submit_order()
@ -384,6 +386,29 @@ class ChartView(ViewBox):
self.order_mode: bool = False
self.setFocusPolicy(QtCore.Qt.StrongFocus)
self._ic = None
def start_ic(
self,
) -> None:
if self._ic is None:
self.chart.pause_all_feeds()
self._ic = trio.Event()
def signal_ic(
self,
*args,
# ev = None,
) -> None:
if args:
print(f'range change dun: {args}')
else:
print('proxy called')
if self._ic:
self._ic.set()
self._ic = None
self.chart.resume_all_feeds()
@asynccontextmanager
async def open_async_input_handler(
@ -429,11 +454,6 @@ class ChartView(ViewBox):
def maxmin(self, callback: Callable) -> None:
self._maxmin = callback
def maybe_downsample_graphics(self):
for graphic in self._chart._graphics.values():
if isinstance(graphic, BarItems):
graphic.maybe_paint_line()
def wheelEvent(
self,
ev,
@ -542,6 +562,11 @@ class ChartView(ViewBox):
self._resetTarget()
self.scaleBy(s, focal)
self.sigRangeChangedManually.emit(mask)
# self._ic.set()
# self._ic = None
# self.chart.resume_all_feeds()
ev.accept()
def mouseDragEvent(
@ -624,6 +649,11 @@ class ChartView(ViewBox):
# XXX: WHY
ev.accept()
self.start_ic()
# if self._ic is None:
# self.chart.pause_all_feeds()
# self._ic = trio.Event()
if axis == 1:
self.chart._static_yrange = 'axis'
@ -641,6 +671,13 @@ class ChartView(ViewBox):
self.sigRangeChangedManually.emit(self.state['mouseEnabled'])
if ev.isFinish():
print('DRAG FINISH')
self.signal_ic()
# self._ic.set()
# self._ic = None
# self.chart.resume_all_feeds()
# WEIRD "RIGHT-CLICK CENTER ZOOM" MODE
elif button & QtCore.Qt.RightButton:
@ -788,11 +825,13 @@ class ChartView(ViewBox):
# iterate those.
# - only register this when certain downsampleable graphics are
# "added to scene".
vb.sigRangeChangedManually.connect(vb.maybe_downsample_graphics)
vb.sigXRangeChanged.connect(vb.maybe_downsample_graphics)
# mouse wheel doesn't emit XRangeChanged
vb.sigRangeChangedManually.connect(vb._set_yrange)
vb.sigResized.connect(vb._set_yrange) # splitter(s) resizing
# splitter(s) resizing
vb.sigResized.connect(vb._set_yrange)
def disable_auto_yrange(
self,
@ -808,10 +847,27 @@ class ChartView(ViewBox):
'''
for graphic in self._chart._graphics.values():
# if isinstance(graphic, BarItems):
xpx = graphic.pixelVectors()[0].x()
xvec = graphic.pixelVectors()[0]
if xvec:
xpx = xvec.x()
if xpx:
return xpx
else:
continue
return 1.0
def maybe_downsample_graphics(self):
# TODO: a faster single-loop-iterator way of doing this XD
chart = self._chart
# graphics = list(self._chart._graphics.values())
for name, graphics in chart._graphics.items():
# pass in no array which will read and render from the last
# passed array (normally provided by the display loop.)
chart.update_graphics_from_array(name)
# for graphic in graphics:
# ds_meth = getattr(graphic, 'maybe_downsample', None)
# if ds_meth:
# ds_meth()