Remove `LevelLine.add_label()`, add dynamic pp marker label
Tyler Goodlet
parent
2fd7ea812a
commit
422b81f0eb
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@ -36,12 +36,6 @@ from ._style import hcolor, _font
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# https://stackoverflow.com/questions/26156486/determine-bounding-rect-of-line-in-qt
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class LevelLine(pg.InfiniteLine):
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# TODO: fill in these slots for orders
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# available parent signals
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# sigDragged(self)
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# sigPositionChangeFinished(self)
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# sigPositionChanged(self)
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def __init__(
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self,
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chart: 'ChartPlotWidget', # type: ignore # noqa
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@ -63,6 +57,9 @@ class LevelLine(pg.InfiniteLine):
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) -> None:
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# TODO: at this point it's probably not worth the inheritance
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# any more since we've reimplemented ``.pain()`` among other
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# things..
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super().__init__(
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movable=movable,
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angle=0,
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@ -97,7 +94,7 @@ class LevelLine(pg.InfiniteLine):
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# list of labels anchored at one of the 2 line endpoints
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# inside the viewbox
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self._labels: List[(int, Label)] = []
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self._labels: List[Label] = []
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self._markers: List[(int, Label)] = []
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# whenever this line is moved trigger label updates
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@ -143,52 +140,6 @@ class LevelLine(pg.InfiniteLine):
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hoverpen.setWidth(2)
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self.hoverPen = hoverpen
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def add_label(
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self,
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# by default we only display the line's level value
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# in the label
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fmt_str: str = (
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'{level:,.{level_digits}f}'
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),
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side: str = 'right',
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side_of_axis: str = 'left',
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x_offset: float = 0,
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color: str = None,
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bg_color: str = None,
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avoid_book: bool = True,
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**label_kwargs,
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) -> Label:
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"""Add a ``LevelLabel`` anchored at one of the line endpoints in view.
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"""
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label = Label(
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view=self.getViewBox(),
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fmt_str=fmt_str,
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color=self.color,
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)
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# set anchor callback
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if side == 'right':
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label.set_x_anchor_func(
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right_axis(
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self._chart,
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label,
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side=side_of_axis,
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offset=x_offset,
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avoid_book=avoid_book,
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)
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)
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elif side == 'left':
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label.set_x_anchor_func(vbr_left(label))
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self._labels.append((side, label))
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return label
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def on_pos_change(
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self,
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line: 'LevelLine', # noqa
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@ -201,9 +152,11 @@ class LevelLine(pg.InfiniteLine):
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def update_labels(
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self,
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fields_data: dict,
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) -> None:
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for at, label in self._labels:
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for label in self._labels:
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label.color = self.color
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# print(f'color is {self.color}')
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@ -211,18 +164,18 @@ class LevelLine(pg.InfiniteLine):
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level = fields_data.get('level')
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if level:
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label.set_view_y(level)
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label.set_view_pos(y=level)
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label.render()
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self.update()
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def hide_labels(self) -> None:
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for at, label in self._labels:
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for label in self._labels:
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label.hide()
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def show_labels(self) -> None:
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for at, label in self._labels:
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for label in self._labels:
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label.show()
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def set_level(
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@ -316,9 +269,10 @@ class LevelLine(pg.InfiniteLine):
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"""
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scene = self.scene()
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if scene:
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for at, label in self._labels:
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for label in self._labels:
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label.delete()
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# gc managed labels?
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self._labels.clear()
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if self._marker:
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@ -406,6 +360,7 @@ class LevelLine(pg.InfiniteLine):
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self._marker.setPos(
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QPointF(marker_right, self.scene_y())
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)
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self._marker.label.update()
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elif not self.use_marker_margin:
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# basically means **don't** shorten the line with normally
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@ -439,7 +394,8 @@ class LevelLine(pg.InfiniteLine):
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def add_marker(
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self,
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path: QtWidgets.QGraphicsPathItem,
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) -> None:
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) -> QtWidgets.QGraphicsPathItem:
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# add path to scene
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self.getViewBox().scene().addItem(path)
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@ -453,6 +409,7 @@ class LevelLine(pg.InfiniteLine):
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# y_in_sc = chart._vb.mapFromView(Point(0, self.value())).y()
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path.setPos(QPointF(rsc, self.scene_y()))
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return path
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# self.update()
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def hoverEvent(self, ev):
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@ -471,6 +428,9 @@ class LevelLine(pg.InfiniteLine):
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if self._moh:
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self.show_markers = True
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if self._marker:
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self._marker.show()
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# highlight if so configured
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if self._hoh:
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@ -514,11 +474,14 @@ class LevelLine(pg.InfiniteLine):
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if self._moh:
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self.show_markers = False
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if self._marker:
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self._marker.hide()
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if self not in cur._trackers:
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cur.show_xhair(y_label_level=self.value())
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if not self._always_show_labels:
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for at, label in self._labels:
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for label in self._labels:
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label.hide()
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label.txt.update()
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# label.unhighlight()
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@ -531,24 +494,19 @@ class LevelLine(pg.InfiniteLine):
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def level_line(
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chart: 'ChartPlotWidget', # noqa
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level: float,
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color: str = 'default',
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# whether or not the line placed in view should highlight
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# when moused over (aka "hovered")
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hl_on_hover: bool = True,
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# line style
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dotted: bool = False,
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color: str = 'default',
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# ux
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hl_on_hover: bool = True,
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# label fields and options
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digits: int = 1,
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always_show_labels: bool = False,
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add_label: bool = True,
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orient_v: str = 'bottom',
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**kwargs,
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) -> LevelLine:
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@ -580,14 +538,31 @@ def level_line(
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if add_label:
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label = line.add_label(
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side='right',
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opacity=1,
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x_offset=0,
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label = Label(
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view=line.getViewBox(),
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# by default we only display the line's level value
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# in the label
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fmt_str=('{level:,.{level_digits}f}'),
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color=color,
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)
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# anchor to right side (of view ) label
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label.set_x_anchor_func(
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right_axis(
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chart,
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label,
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side='left', # side of axis
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offset=0,
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avoid_book=False,
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)
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label.orient_v = orient_v
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)
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# add to label set which will be updated on level changes
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line._labels.append(label)
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label.orient_v = orient_v
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line.update_labels({'level': level, 'level_digits': 2})
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label.render()
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@ -600,6 +575,7 @@ def level_line(
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def order_line(
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chart,
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level: float,
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level_digits: float,
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@ -651,7 +627,8 @@ def order_line(
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# resetting the graphics item transform intermittently
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# XXX: this is our new approach but seems slower?
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# line.add_marker(mk_marker(marker_style, marker_size))
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# path = line.add_marker(mk_marker(marker_style, marker_size))
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# assert line._marker == path
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assert not line.markers
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@ -672,14 +649,22 @@ def order_line(
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orient_v = 'top' if action == 'sell' else 'bottom'
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if action == 'alert':
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llabel = Label(
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view=line.getViewBox(),
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color=line.color,
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# completely different labelling for alerts
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fmt_str = 'alert => {level}'
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fmt_str='alert => {level}',
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)
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# for now, we're just duplicating the label contents i guess..
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llabel = line.add_label(
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side='left',
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fmt_str=fmt_str,
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)
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line._labels.append(llabel)
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# anchor to left side of view / line
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llabel.set_x_anchor_func(vbr_left(llabel))
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llabel.fields = {
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'level': level,
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'level_digits': level_digits,
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@ -689,31 +674,30 @@ def order_line(
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llabel.show()
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else:
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# # left side label
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# llabel = line.add_label(
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# side='left',
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# fmt_str=' {exec_type}-{order_type}:\n ${$value}',
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# )
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# llabel.fields = {
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# 'order_type': order_type,
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# 'level': level,
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# '$value': lambda f: f['level'] * f['size'],
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# 'size': size,
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# 'exec_type': exec_type,
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# }
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# llabel.orient_v = orient_v
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# llabel.render()
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# llabel.show()
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# right before L1 label
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rlabel = line.add_label(
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side='right',
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side_of_axis='left',
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x_offset=4*marker_size,
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fmt_str=(
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'{size:.{size_digits}f} '
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),
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rlabel = Label(
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view=line.getViewBox(),
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# display the order pos size
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fmt_str=('{size:.{size_digits}f} '),
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color=line.color,
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)
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# set anchor callback
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# right side label by default
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rlabel.set_x_anchor_func(
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right_axis(
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chart,
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rlabel,
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side='left', # side of axis
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offset=4*marker_size,
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avoid_book=True,
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)
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)
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line._labels.append(rlabel)
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rlabel.fields = {
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'size': size,
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'size_digits': size_digits,
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@ -742,69 +726,23 @@ def position_line(
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execution submitted to the EMS via the chart's "order mode".
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"""
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hcolor = 'default_light'
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line = level_line(
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chart,
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level,
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color='default_light',
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color=hcolor,
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add_label=False,
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hl_on_hover=False,
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movable=False,
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always_show_labels=False,
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hide_xhair_on_hover=False,
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use_marker_margin=True,
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only_show_markers_on_hover=False,
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always_show_labels=True,
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)
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# hide position marker when out of view (for now)
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vb = line.getViewBox()
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def update_pp_nav(chartview):
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vr = vb.state['viewRange']
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ymn, ymx = vr[1]
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level = line.value()
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path = line._marker
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# provide "nav hub" like indicator for where
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# the position is on the y-dimension
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# print(path._height)
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# print(vb.shape())
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# print(vb.boundingRect())
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# print(vb.height())
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_, marker_right, _ = line.marker_right_points()
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if level > ymx: # pin to top of view
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path.setPos(
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QPointF(
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marker_right,
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2 + path._height,
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)
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)
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elif level < ymn: # pin to bottom of view
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path.setPos(
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QPointF(
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marker_right,
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vb.height() - 16 + path._height,
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)
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)
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else:
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# pp line is viewable so show marker
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line._marker.show()
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vb.sigYRangeChanged.connect(update_pp_nav)
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rlabel = line.add_label(
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side='right',
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fmt_str='{direction}: {size} -> ${$:.2f}',
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)
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rlabel.fields = {
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'direction': 'long' if size > 0 else 'short',
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'$': size * level,
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'size': size,
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}
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rlabel.orient_v = orient_v
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rlabel.render()
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rlabel.show()
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# arrow marker
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# scale marker size with dpi-aware font size
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font_size = _font.font.pixelSize()
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@ -819,8 +757,40 @@ def position_line(
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arrow_path = mk_marker(style, size=arrow_size)
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path_br = arrow_path.mapToScene(
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arrow_path.path()
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).boundingRect()
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# monkey-cache height for sizing on pp nav-hub
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arrow_path._height = arrow_path.boundingRect().height()
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arrow_path._height = path_br.height()
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arrow_path._width = path_br.width()
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# wp = QPointF(w, w)
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marker_label = Label(
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view=vb,
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fmt_str='pp',
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color=hcolor,
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update_on_range_change=False,
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)
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arrow_path.label = marker_label
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# def arrow_br():
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# # get actual arrow graphics path
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# path_br = arrow_path.mapToScene(
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# arrow_path.path()
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# ).boundingRect()
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# # vb.locate(arrow_path) #, children=True)
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# return path_br.bottomRight() - QPointF(0, marker_label.h / 2)
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# marker_label.scene_anchor = arrow_br
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line._labels.append(marker_label)
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marker_label.render()
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marker_label.show()
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# XXX: uses new marker drawing approach
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line.add_marker(arrow_path)
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@ -829,4 +799,56 @@ def position_line(
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# sanity check
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line.update_labels({'level': level})
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def update_pp_nav(chartview):
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'''Show a pp off-screen indicator when order mode is activated.
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'''
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vr = vb.state['viewRange']
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ymn, ymx = vr[1]
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level = line.value()
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path = line._marker
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label = path.label
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# get actual arrow-marker graphics path
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path_br = path.mapToScene(
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path.path()
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).boundingRect()
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# provide "nav hub" like indicator for where
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# the position is on the y-dimension
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_, marker_right, _ = line.marker_right_points()
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if level > ymx: # pin to top of view
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path.setPos(
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QPointF(
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marker_right,
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path._height/3,
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)
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)
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elif level < ymn: # pin to bottom of view
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path.setPos(
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QPointF(
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marker_right,
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vb.height() - 4/3*path._height,
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)
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)
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# adjust marker labels to be above bottom of view
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label.txt.setPos(path_br.topRight() - QPointF(0, label.h / 2))
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else:
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# pp line is viewable so show marker normally
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line._marker.show()
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# place label at bottom right of pp marker
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label.txt.setPos(path_br.bottomRight() - QPointF(0, label.h / 2))
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line.show_labels()
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vb.sigRangeChanged.connect(update_pp_nav)
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return line
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