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Move all anchor funcs to new mod

fsp_feeds
Tyler Goodlet 2021-07-16 14:50:59 -04:00
parent 94d3f67707
commit e58a980786
3 changed files with 127 additions and 102 deletions
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119
piker/ui/_anchors.py
View File

@ -18,6 +18,11 @@
Anchor funtions for UI placement of annotions.
'''
from typing import Callable
from PyQt5.QtCore import QPointF
from ._label import Label
def marker_right_points(
@ -26,8 +31,13 @@ def marker_right_points(
marker_size: int = 20,
) -> (float, float, float):
'''Return x-dimension, y-axis-aware, level-line marker oriented scene values.
# chart = self._chart
X values correspond to set the end of a level line, end of
a paried level line marker, and the right most side of the "right"
axis respectively.
'''
l1_len = chart._max_l1_line_len
ryaxis = chart.getAxis('right')
@ -38,3 +48,110 @@ def marker_right_points(
line_end = marker_right - (6/16 * marker_size)
return line_end, marker_right, r_axis_x
def vbr_left(
label: Label,
) -> Callable[..., float]:
"""Return a closure which gives the scene x-coordinate for the
leftmost point of the containing view box.
"""
return label.vbr().left
def right_axis(
chart: 'ChartPlotWidget', # noqa
label: Label,
side: str = 'left',
offset: float = 10,
avoid_book: bool = True,
# width: float = None,
) -> Callable[..., float]:
'''Return a position closure which gives the scene x-coordinate for
the x point on the right y-axis minus the width of the label given
it's contents.
'''
ryaxis = chart.getAxis('right')
if side == 'left':
if avoid_book:
def right_axis_offset_by_w() -> float:
# l1 spread graphics x-size
l1_len = chart._max_l1_line_len
# sum of all distances "from" the y-axis
right_offset = l1_len + label.w + offset
return ryaxis.pos().x() - right_offset
else:
def right_axis_offset_by_w() -> float:
return ryaxis.pos().x() - (label.w + offset)
return right_axis_offset_by_w
elif 'right':
# axis_offset = ryaxis.style['tickTextOffset'][0]
def on_axis() -> float:
return ryaxis.pos().x() # + axis_offset - 2
return on_axis
def update_pp_nav(
chartview: 'ChartView', # noqa
line: 'LevelLine', # noqa
) -> None:
'''Show a pp off-screen indicator for a level label.
This is like in fps games where you have a gps "nav" indicator
but your teammate is outside the range of view, except in 2D, on
the y-dimension.
'''
vr = chartview.state['viewRange']
ymn, ymx = vr[1]
level = line.value()
marker = line._marker
label = marker.label
_, marker_right, _ = marker_right_points(line._chart)
if level > ymx: # pin to top of view
marker.setPos(
QPointF(
marker_right,
marker._height/3,
)
)
elif level < ymn: # pin to bottom of view
marker.setPos(
QPointF(
marker_right,
chartview.height() - 4/3*marker._height,
)
)
else:
# pp line is viewable so show marker normally
marker.update()
# re-anchor label (i.e. trigger call of ``arrow_tr()`` from above
label.update()

58
piker/ui/_label.py
View File

@ -223,61 +223,3 @@ class Label:
def delete(self) -> None:
self.vb.scene().removeItem(self.txt)
# anchoring helper funcs
def vbr_left(label) -> Callable[..., float]:
"""Return a closure which gives the scene x-coordinate for the
leftmost point of the containing view box.
"""
return label.vbr().left
def right_axis(
chart: 'ChartPlotWidget', # noqa
label: 'Label', # noqa
side: str = 'left',
offset: float = 10,
avoid_book: bool = True,
width: float = None,
) -> Callable[..., float]:
"""Return a position closure which gives the scene x-coordinate for
the x point on the right y-axis minus the width of the label given
it's contents.
"""
ryaxis = chart.getAxis('right')
if side == 'left':
if avoid_book:
def right_axis_offset_by_w() -> float:
# l1 spread graphics x-size
l1_len = chart._max_l1_line_len
# sum of all distances "from" the y-axis
right_offset = l1_len + label.w + offset
return ryaxis.pos().x() - right_offset
else:
def right_axis_offset_by_w() -> float:
return ryaxis.pos().x() - (label.w + offset)
return right_axis_offset_by_w
elif 'right':
# axis_offset = ryaxis.style['tickTextOffset'][0]
def on_axis() -> float:
return ryaxis.pos().x() # + axis_offset - 2
return on_axis

52
piker/ui/_lines.py
View File

@ -18,6 +18,7 @@
Lines for orders, alerts, L2.
"""
from functools import partial
from math import floor
from typing import Tuple, Optional, List
@ -27,8 +28,13 @@ from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import QPointF
from ._annotate import mk_marker, qgo_draw_markers
from ._anchors import marker_right_points
from ._label import Label, vbr_left, right_axis
from ._anchors import (
marker_right_points,
vbr_left,
right_axis,
update_pp_nav,
)
from ._label import Label
from ._style import hcolor, _font
@ -785,46 +791,6 @@ def position_line(
# sanity check
line.update_labels({'level': level})
def update_pp_nav(chartview):
'''Show a pp off-screen indicator when order mode is activated.
This is like in fps games where you have a gps "nav" indicator
but your teammate is outside the range of view, except in 2D, on
the y-dimension.
'''
vr = vb.state['viewRange']
ymn, ymx = vr[1]
level = line.value()
marker = line._marker
label = marker.label
_, marker_right, _ = marker_right_points(line._chart)
if level > ymx: # pin to top of view
marker.setPos(
QPointF(
marker_right,
marker._height/3,
)
)
elif level < ymn: # pin to bottom of view
marker.setPos(
QPointF(
marker_right,
vb.height() - 4/3*marker._height,
)
)
else:
# pp line is viewable so show marker normally
marker.update()
# re-anchor label (i.e. trigger call of ``arrow_tr()`` from above
label.update()
vb.sigRangeChanged.connect(update_pp_nav)
vb.sigRangeChanged.connect(partial(update_pp_nav, chartview=vb, line=line))
return line