Specialize `LevelLabel` for orientation-around-axis gymnastics
Tyler Goodlet
parent
9c3850874d
commit
db075b81ac
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@ -113,7 +113,7 @@ class AxisLabel(pg.GraphicsObject):
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digits: int = 2,
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bg_color: str = 'bracket',
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fg_color: str = 'black',
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opacity: int = 1,
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opacity: int = 0,
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font_size: Optional[int] = None,
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):
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super().__init__(parent)
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@ -162,6 +162,7 @@ class AxisLabel(pg.GraphicsObject):
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) -> None:
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# this adds a nice black outline around the label for some odd
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# reason; ok by us
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p.setOpacity(self.opacity)
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p.drawRect(self.rect)
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def boundingRect(self): # noqa
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@ -214,11 +215,11 @@ class XAxisLabel(AxisLabel):
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def update_label(
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self,
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abs_pos: QPointF, # scene coords
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data: float, # data for text
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value: float, # data for text
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offset: int = 1 # if have margins, k?
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) -> None:
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timestrs = self.parent._indexes_to_timestrs([int(data)])
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timestrs = self.parent._indexes_to_timestrs([int(value)])
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if not timestrs.any():
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return
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@ -230,6 +231,7 @@ class XAxisLabel(AxisLabel):
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abs_pos.x() - w / 2 - offset,
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0,
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))
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self.update()
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class YAxisLabel(AxisLabel):
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@ -248,13 +250,13 @@ class YAxisLabel(AxisLabel):
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def update_label(
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self,
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abs_pos: QPointF, # scene coords
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data: float, # data for text
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value: float, # data for text
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offset: int = 1 # on odd dimension and/or adds nice black line
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) -> None:
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# this is read inside ``.paint()``
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self.label_str = '{data: ,.{digits}f}'.format(
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digits=self.digits, data=data).replace(',', ' ')
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self.label_str = '{value: ,.{digits}f}'.format(
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digits=self.digits, value=value).replace(',', ' ')
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br = self.boundingRect()
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h = br.height()
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@ -262,6 +264,7 @@ class YAxisLabel(AxisLabel):
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0,
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abs_pos.y() - h / 2 - offset
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))
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self.update()
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class YSticky(YAxisLabel):
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@ -271,31 +274,23 @@ class YSticky(YAxisLabel):
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self,
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chart,
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*args,
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orient_v: str = 'bottom',
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orient_h: str = 'left',
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**kwargs
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) -> None:
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super().__init__(*args, **kwargs)
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self._orient_v = orient_v
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self._orient_h = orient_h
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self._chart = chart
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chart.sigRangeChanged.connect(self.update_on_resize)
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self._last_datum = (None, None)
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self._v_shift = {'top': 1., 'bottom': 0, 'middle': 1/2.}[orient_v]
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self._h_shift = {'left': -1., 'right': 0}[orient_h]
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def update_on_resize(self, vr, r):
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# TODO: add an `.index` to the array data-buffer layer
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# and make this way less shitty...
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# pretty sure we did that ^ ?
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index, last = self._last_datum
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if index is not None:
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self.update_from_data(
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index,
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last,
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)
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self.update_from_data(index, last)
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def update_from_data(
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self,
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@ -15,6 +15,9 @@ from ._style import _xaxis_at, hcolor, _font
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from ._axes import YAxisLabel, XAxisLabel, YSticky
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# XXX: these settings seem to result in really decent mouse scroll
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# latency (in terms of perceived lag in cross hair) so really be sure
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# there's an improvement if you want to change it.
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_mouse_rate_limit = 60 # calc current screen refresh rate?
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_debounce_delay = 1 / 2e3
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_ch_label_opac = 1
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@ -266,7 +269,7 @@ class CrossHair(pg.GraphicsObject):
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self.graphics[plot]['hl'].setY(y)
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self.graphics[self.active_plot]['yl'].update_label(
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abs_pos=pos, data=y
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abs_pos=pos, value=y
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)
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# Update x if cursor changed after discretization calc
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@ -296,7 +299,7 @@ class CrossHair(pg.GraphicsObject):
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# map back to abs (label-local) coordinates
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abs_pos=plot.mapFromView(QPointF(ix, y)),
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data=x,
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value=x,
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)
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self._lastx = ix
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@ -553,7 +556,7 @@ class BarItems(pg.GraphicsObject):
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# writer is responsible for changing open on "first" volume of bar
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larm.setLine(larm.x1(), o, larm.x2(), o)
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if l != h:
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if l != h: # noqa
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if body is None:
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body = self.lines[index - 1][0] = QLineF(i, l, i, h)
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else:
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@ -649,29 +652,61 @@ class LevelLabel(YSticky):
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_w_margin = 4
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_h_margin = 3
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level: float = 0
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def __init__(
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self,
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chart,
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*args,
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orient_v: str = 'bottom',
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orient_h: str = 'left',
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**kwargs
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) -> None:
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super().__init__(chart, *args, **kwargs)
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# orientation around axis options
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self._orient_v = orient_v
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self._orient_h = orient_h
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self._v_shift = {
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'top': 1.,
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'bottom': 0,
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'middle': 1 / 2.
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}[orient_v]
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self._h_shift = {
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'left': -1., 'right': 0
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}[orient_h]
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def update_label(
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self,
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abs_pos: QPointF, # scene coords
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data: float, # data for text
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level: float, # data for text
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offset: int = 1 # if have margins, k?
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) -> None:
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# this is read inside ``.paint()``
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self.label_str = '{data: ,.{digits}f}'.format(
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digits=self.digits,
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data=data
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).replace(',', ' ')
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self._size_br_from_str(self.label_str)
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# write contents, type specific
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self.set_label_str(level)
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br = self.boundingRect()
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h, w = br.height(), br.width()
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# this triggers ``.pain()`` implicitly?
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self.setPos(QPointF(
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self._h_shift * w - offset,
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abs_pos.y() - (self._v_shift * h) - offset
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))
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self.update()
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self.level = level
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def set_label_str(self, level: float):
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# this is read inside ``.paint()``
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# self.label_str = '{size} x {level:.{digits}f}'.format(
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self.label_str = '{level:.{digits}f}'.format(
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# size=self._size,
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digits=self.digits,
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level=level
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).replace(',', ' ')
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def size_hint(self) -> Tuple[None, None]:
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return None, None
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@ -687,19 +722,43 @@ class LevelLabel(YSticky):
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p.drawLine(rect.bottomLeft(), rect.bottomRight())
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class L1Label(LevelLabel):
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size: float = 0
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text_flags = (
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QtCore.Qt.TextDontClip
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| QtCore.Qt.AlignLeft
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)
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def set_label_str(self, level: float) -> None:
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"""Reimplement the label string write to include the level's order-queue's
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size in the text, eg. 100 x 323.3.
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"""
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self.label_str = '{size} x {level:,.{digits}f}'.format(
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size=self.size or '?',
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digits=self.digits,
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level=level
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).replace(',', ' ')
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class L1Labels:
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"""Level 1 bid ask labels for dynamic update on price-axis.
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"""
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max_value: float = '100 x 100 000'
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def __init__(
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self,
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chart: 'ChartPlotWidget', # noqa
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# level: float,
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digits: int = 2,
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font_size: int = 4,
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) -> None:
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self.chart = chart
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self.bid_label = LevelLabel(
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self.bid_label = L1Label(
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chart=chart,
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parent=chart.getAxis('right'),
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# TODO: pass this from symbol data
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@ -710,8 +769,9 @@ class L1Labels:
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fg_color='bracket',
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orient_v='bottom',
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)
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self.bid_label._size_br_from_str(self.max_value)
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self.ask_label = LevelLabel(
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self.ask_label = L1Label(
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chart=chart,
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parent=chart.getAxis('right'),
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# TODO: pass this from symbol data
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@ -722,6 +782,7 @@ class L1Labels:
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fg_color='bracket',
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orient_v='top',
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)
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self.ask_label._size_br_from_str(self.max_value)
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class LevelLine(pg.InfiniteLine):
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@ -732,9 +793,9 @@ class LevelLine(pg.InfiniteLine):
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) -> None:
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self.label = label
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super().__init__(**kwargs)
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self.sigPositionChanged.connect(self.set_value)
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self.sigPositionChanged.connect(self.set_level)
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def set_value(self, value: float) -> None:
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def set_level(self, value: float) -> None:
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self.label.update_from_data(0, self.value())
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@ -755,11 +816,14 @@ def level_line(
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digits=digits,
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opacity=1,
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font_size=font_size,
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# TODO: make this take the view's bg pen
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bg_color='papas_special',
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fg_color='default',
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**linelabelkwargs
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)
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label.update_from_data(0, level)
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# TODO: can we somehow figure out a max value from the parent axis?
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label._size_br_from_str(label.label_str)
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line = LevelLine(
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label,
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