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Add `LevelLine.get_cursor()` to get any currently hovering mouse-cursor

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Tyler Goodlet 2022-09-13 18:26:06 -04:00
parent e492e9ca0c
commit df42e7acc4
1 changed files with 31 additions and 11 deletions
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42
piker/ui/_lines.py
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@ -18,9 +18,14 @@
Lines for orders, alerts, L2. Lines for orders, alerts, L2.
""" """
from __future__ import annotations
from functools import partial from functools import partial
from math import floor from math import floor
from typing import Optional, Callable from typing import (
Optional,
Callable,
TYPE_CHECKING,
)
import pyqtgraph as pg import pyqtgraph as pg
from pyqtgraph import Point, functions as fn from pyqtgraph import Point, functions as fn
@ -37,6 +42,9 @@ from ..calc import humanize
from ._label import Label from ._label import Label
from ._style import hcolor, _font from ._style import hcolor, _font
if TYPE_CHECKING:
from ._cursor import Cursor
# TODO: probably worth investigating if we can # TODO: probably worth investigating if we can
# make .boundingRect() faster: # make .boundingRect() faster:
@ -220,20 +228,23 @@ class LevelLine(pg.InfiniteLine):
y: float y: float
) -> None: ) -> None:
'''Chart coordinates cursor tracking callback. '''
Chart coordinates cursor tracking callback.
this is called by our ``Cursor`` type once this line is set to this is called by our ``Cursor`` type once this line is set to
track the cursor: for every movement this callback is invoked to track the cursor: for every movement this callback is invoked to
reposition the line with the current view coordinates. reposition the line with the current view coordinates.
''' '''
self.movable = True self.movable = True
self.set_level(y) # implictly calls reposition handler self.set_level(y) # implictly calls reposition handler
def mouseDragEvent(self, ev): def mouseDragEvent(self, ev):
"""Override the ``InfiniteLine`` handler since we need more '''
Override the ``InfiniteLine`` handler since we need more
detailed control and start end signalling. detailed control and start end signalling.
""" '''
cursor = self._chart.linked.cursor cursor = self._chart.linked.cursor
# hide y-crosshair # hide y-crosshair
@ -285,10 +296,20 @@ class LevelLine(pg.InfiniteLine):
# show y-crosshair again # show y-crosshair again
cursor.show_xhair() cursor.show_xhair()
def delete(self) -> None: def get_cursor(self) -> Optional[Cursor]:
"""Remove this line from containing chart/view/scene.
""" chart = self._chart
cur = chart.linked.cursor
if self in cur._hovered:
return cur
return None
def delete(self) -> None:
'''
Remove this line from containing chart/view/scene.
'''
scene = self.scene() scene = self.scene()
if scene: if scene:
for label in self._labels: for label in self._labels:
@ -302,9 +323,8 @@ class LevelLine(pg.InfiniteLine):
# remove from chart/cursor states # remove from chart/cursor states
chart = self._chart chart = self._chart
cur = chart.linked.cursor cur = self.get_cursor()
if cur:
if self in cur._hovered:
cur._hovered.remove(self) cur._hovered.remove(self)
chart.plotItem.removeItem(self) chart.plotItem.removeItem(self)
@ -312,8 +332,8 @@ class LevelLine(pg.InfiniteLine):
def mouseDoubleClickEvent( def mouseDoubleClickEvent(
self, self,
ev: QtGui.QMouseEvent, ev: QtGui.QMouseEvent,
) -> None:
) -> None:
# TODO: enter labels edit mode # TODO: enter labels edit mode
print(f'double click {ev}') print(f'double click {ev}')