Unify into a single update method: `.update_graphics_from_array()`
Tyler Goodlet
parent
1cf6ba789c
commit
3b90b1f960
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@ -838,8 +838,12 @@ class ChartPlotWidget(pg.PlotWidget):
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'''
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l, r = self.view_range()
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array = self._arrays[self.name]
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lbar = max(l, array[0]['index'])
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rbar = min(r, array[-1]['index'])
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start, stop = self._xrange = (
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array[0]['index'],
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array[-1]['index'],
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)
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lbar = max(l, start)
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rbar = min(r, stop)
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return l, lbar, rbar, r
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def curve_width_pxs(
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@ -907,7 +911,7 @@ class ChartPlotWidget(pg.PlotWidget):
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return
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xfirst, xlast = index[0], index[-1]
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brange = l, lbar, rbar, r = self.bars_range()
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l, lbar, rbar, r = self.bars_range()
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marker_pos, l1_len = self.pre_l1_xs()
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end = xlast + l1_len + 1
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@ -986,7 +990,8 @@ class ChartPlotWidget(pg.PlotWidget):
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graphics = BarItems(
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self.linked,
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self.plotItem,
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pen_color=self.pen_color
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pen_color=self.pen_color,
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name=name,
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)
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# adds all bar/candle graphics objects for each data point in
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@ -1175,11 +1180,13 @@ class ChartPlotWidget(pg.PlotWidget):
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)
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return last
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def update_ohlc_from_array(
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def update_graphics_from_array(
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self,
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graphics_name: str,
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array: np.ndarray,
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array: Optional[np.ndarray] = None,
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array_key: Optional[str] = None,
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**kwargs,
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) -> pg.GraphicsObject:
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@ -1187,49 +1194,60 @@ class ChartPlotWidget(pg.PlotWidget):
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Update the named internal graphics from ``array``.
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'''
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self._arrays[self.name] = array
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if array is not None:
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assert len(array)
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data_key = array_key or graphics_name
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if graphics_name not in self._flows:
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data_key = self.name
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if array is not None:
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# write array to internal graphics table
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self._arrays[data_key] = array
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else:
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array = self._arrays[data_key]
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# array key and graphics "name" might be different..
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graphics = self._graphics[graphics_name]
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graphics.update_from_array(array, **kwargs)
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# compute "in-view" indices
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l, lbar, rbar, r = self.bars_range()
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indexes = array['index']
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ifirst = indexes[0]
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ilast = indexes[-1]
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lbar_i = max(l, ifirst) - ifirst
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rbar_i = min(r, ilast) - ifirst
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# TODO: we could do it this way as well no?
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# to_draw = array[lbar - ifirst:(rbar - ifirst) + 1]
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in_view = array[lbar_i: rbar_i]
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if not in_view.size:
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return graphics
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def update_curve_from_array(
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self,
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if isinstance(graphics, BarItems):
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graphics.update_from_array(
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array,
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in_view,
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view_range=(lbar_i, rbar_i),
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graphics_name: str,
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array: np.ndarray,
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array_key: Optional[str] = None,
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**kwargs,
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)
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) -> pg.GraphicsObject:
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'''
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Update the named internal graphics from ``array``.
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'''
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assert len(array)
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data_key = array_key or graphics_name
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if graphics_name not in self._flows:
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self._arrays[self.name] = array
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else:
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self._arrays[data_key] = array
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curve = self._graphics[graphics_name]
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# NOTE: back when we weren't implementing the curve graphics
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# ourselves you'd have updates using this method:
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# curve.setData(y=array[graphics_name], x=array['index'], **kwargs)
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# NOTE: graphics **must** implement a diff based update
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# operation where an internal ``FastUpdateCurve._xrange`` is
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# used to determine if the underlying path needs to be
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# pre/ap-pended.
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curve.update_from_array(
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graphics.update_from_array(
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x=array['index'],
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y=array[data_key],
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x_iv=in_view['index'],
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y_iv=in_view[data_key],
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view_range=(lbar_i, rbar_i),
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**kwargs
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)
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return curve
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return graphics
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# def _label_h(self, yhigh: float, ylow: float) -> float:
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# # compute contents label "height" in view terms
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@ -1260,6 +1278,9 @@ class ChartPlotWidget(pg.PlotWidget):
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# print(f"bounds (ylow, yhigh): {(ylow, yhigh)}")
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# TODO: pretty sure we can just call the cursor
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# directly not? i don't wee why we need special "signal proxies"
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# for this lul..
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def enterEvent(self, ev): # noqa
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# pg.PlotWidget.enterEvent(self, ev)
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self.sig_mouse_enter.emit(self)
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