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Finally fix our `SelectRect` for use with cursor.. 

Turns out using the `.setRect()` method was the main cause of the issue
(though still don't really understand how or why) and this instead
adopts verbatim the code from `pg.ViewBox.updateScaleBox()` which uses
a scaling transform to set the rect for the "zoom scale box" thingy.

Further add a shite ton more improvements and interface tweaks in
support of the new remote-annotation control msging subsys:
- re-impl `.set_scen_pos()` to expect `QGraphicsScene` coordinates (i.e.
  passed from the interaction loop and pass scene `QPointF`s from
  `ViewBox.mouseDragEvent()` using the `MouseDragEvent.scenePos()` and
  friends; this is required to properly use the transform setting
  approach to resize the select-rect as mentioned above.
- add `as_point()` converter to maybe-cast python `tuple[float, float]`
  inputs (prolly from IPC msgs) to equivalent `QPointF`s.
- add a ton more detailed Qt-obj-related typing throughout our deriv.
- call `.add_to_view()` from init so that wtv view is passed in during
  instantiation is always set as the `.vb` after creation.
- factor the (proxy widget) label creation into a new `.init_label()`
  so that both the `set_scen/view_pos()` methods can call it and just
  generally decouple rect-pos mods from label content mods.
distribute_dis
Tyler Goodlet 2023-12-22 11:47:31 -05:00
parent 31fa0b02f5
commit 69368f20c2
1 changed files with 201 additions and 52 deletions
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253
piker/ui/_editors.py
View File

@ -21,7 +21,8 @@ Higher level annotation editors.
from __future__ import annotations
from collections import defaultdict
from typing import (
TYPE_CHECKING
Sequence,
TYPE_CHECKING,
)
import pyqtgraph as pg
@ -31,24 +32,36 @@ from pyqtgraph import (
QtCore,
QtWidgets,
)
from PyQt5.QtCore import (
QPointF,
QRectF,
)
from PyQt5.QtGui import (
QColor,
QTransform,
)
from PyQt5.QtWidgets import (
QGraphicsProxyWidget,
QGraphicsScene,
QLabel,
)
from pyqtgraph import functions as fn
from PyQt5.QtCore import QPointF
import numpy as np
from piker.types import Struct
from ._style import hcolor, _font
from ._style import (
hcolor,
_font,
)
from ._lines import LevelLine
from ..log import get_logger
if TYPE_CHECKING:
from ._chart import GodWidget
from ._chart import (
GodWidget,
ChartPlotWidget,
)
from ._interaction import ChartView
@ -66,7 +79,7 @@ class ArrowEditor(Struct):
uid: str,
x: float,
y: float,
color='default',
color: str = 'default',
pointing: str | None = None,
) -> pg.ArrowItem:
@ -252,27 +265,56 @@ class LineEditor(Struct):
return lines
class SelectRect(QtWidgets.QGraphicsRectItem):
def as_point(
pair: Sequence[float, float] | QPointF,
) -> list[QPointF, QPointF]:
'''
Case any input tuple of floats to a a list of `QPoint` objects
for use in Qt geometry routines.
'''
if isinstance(pair, QPointF):
return pair
return QPointF(pair[0], pair[1])
# TODO: maybe implement better, something something RectItemProxy??
# -[ ] dig into details of how proxy's work?
# https://doc.qt.io/qt-5/qgraphicsscene.html#addWidget
# -[ ] consider using `.addRect()` maybe?
class SelectRect(QtWidgets.QGraphicsRectItem):
'''
A data-view "selection rectangle": the most fundamental
geometry for annotating data views.
- https://doc.qt.io/qt-5/qgraphicsrectitem.html
- https://doc.qt.io/qt-6/qgraphicsrectitem.html
'''
def __init__(
self,
viewbox: ViewBox,
color: str = 'dad_blue',
color: str | None = None,
) -> None:
super().__init__(0, 0, 1, 1)
# self.rbScaleBox = QGraphicsRectItem(0, 0, 1, 1)
self.vb: ViewBox = viewbox
self._chart: 'ChartPlotWidget' = None # noqa
# override selection box color
self._chart: ChartPlotWidget | None = None # noqa
# TODO: maybe allow this to be dynamic via a method?
#l override selection box color
color: str = color or 'dad_blue'
color = QColor(hcolor(color))
self.setPen(fn.mkPen(color, width=1))
color.setAlpha(66)
self.setBrush(fn.mkBrush(color))
self.setZValue(1e9)
self.hide()
self._label = None
label = self._label = QLabel()
label.setTextFormat(0) # markdown
@ -282,13 +324,15 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
QtCore.Qt.AlignLeft
# | QtCore.Qt.AlignVCenter
)
label.hide() # always right after init
# proxy is created after containing scene is initialized
self._label_proxy = None
self._abs_top_right = None
self._label_proxy: QGraphicsProxyWidget | None = None
self._abs_top_right: Point | None = None
# TODO: "swing %" might be handy here (data's max/min # % change)
self._contents = [
# TODO: "swing %" might be handy here (data's max/min
# # % change)?
self._contents: list[str] = [
'change: {pchng:.2f} %',
'range: {rng:.2f}',
'bars: {nbars}',
@ -298,25 +342,30 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
'sigma: {std:.2f}',
]
self.add_to_view(viewbox)
def add_to_view(
self,
view: ChartView,
) -> None:
'''
Self-defined view hookup impl.
Self-defined view hookup impl which will
also re-assign the internal ref.
'''
view.addItem(
self,
ignoreBounds=True,
)
if self.vb is not view:
self.vb = view
@property
def chart(self) -> 'ChartPlotWidget': # noqa
def chart(self) -> ChartPlotWidget: # noqa
return self._chart
@chart.setter
def chart(self, chart: 'ChartPlotWidget') -> None: # noqa
def chart(self, chart: ChartPlotWidget) -> None: # noqa
self._chart = chart
chart.sigRangeChanged.connect(self.update_on_resize)
palette = self._label.palette()
@ -340,8 +389,10 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
def set_scen_pos(
self,
p1: QPointF,
p2: QPointF
scen_p1: QPointF,
scen_p2: QPointF,
update_label: bool = True,
) -> None:
'''
@ -350,16 +401,50 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
match.
'''
# map to view coords
self.set_view_pos(
self.vb.mapToView(p1),
self.vb.mapToView(p2),
# NOTE XXX: apparently just setting it doesn't work!?
# i have no idea why but it's pretty weird we have to do
# this transform thing which was basically pulled verbatim
# from the `pg.ViewBox.updateScaleBox()` method.
view_rect: QRectF = self.vb.childGroup.mapRectFromScene(
QRectF(
scen_p1,
scen_p2,
)
)
self.setPos(view_rect.topLeft())
# XXX: does not work..!?!?
# https://doc.qt.io/qt-5/qgraphicsrectitem.html#setRect
# self.setRect(view_rect)
tr = QTransform.fromScale(
view_rect.width(),
view_rect.height(),
)
self.setTransform(tr)
# XXX: never got this working, was always offset
# / transformed completely wrong (and off to the far right
# from the cursor?)
# self.set_view_pos(
# view_rect=view_rect,
# # self.vwqpToView(p1),
# # self.vb.mapToView(p2),
# # start_pos=self.vb.mapToScene(p1),
# # end_pos=self.vb.mapToScene(p2),
# )
self.show()
if update_label:
self.init_label(view_rect)
def set_view_pos(
self,
start_pos: QPointF,
end_pos: QPointF,
start_pos: QPointF | Sequence[float, float] | None = None,
end_pos: QPointF | Sequence[float, float] | None = None,
view_rect: QRectF | None = None,
update_label: bool = True,
) -> None:
'''
@ -368,27 +453,80 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
moved to match).
'''
# https://doc.qt.io/qt-5/qgraphicsproxywidget.html
if self._label_proxy is None:
self._label_proxy = self.vb.scene(
).addWidget(self._label)
if self._chart is None:
raise RuntimeError(
'You MUST assign a `SelectRect.chart: ChartPlotWidget`!'
)
# map to view coords and update area
r = QtCore.QRectF(start_pos, end_pos)
if view_rect is None:
# ensure point casting
start_pos: QPointF = as_point(start_pos)
end_pos: QPointF = as_point(end_pos)
# old way; don't need right?
# lr = QtCore.QRectF(p1, p2)
# r = self.vb.childGroup.mapRectFromParent(lr)
# map to view coords and update area
view_rect = QtCore.QRectF(
start_pos,
end_pos,
)
self.setPos(r.topLeft())
self.resetTransform()
self.setRect(r)
self.setPos(view_rect.topLeft())
# NOTE: SERIOUSLY NO IDEA WHY THIS WORKS...
# but it does and all the other commented stuff above
# dint, dawg..
# self.resetTransform()
# self.setRect(view_rect)
tr = QTransform.fromScale(
view_rect.width(),
view_rect.height(),
)
self.setTransform(tr)
if update_label:
self.init_label(view_rect)
print(
'SelectRect modify:\n'
f'QRectF: {view_rect}\n'
f'start_pos: {start_pos}\n'
f'end_pos: {end_pos}\n'
)
self.show()
y1, y2 = start_pos.y(), end_pos.y()
x1, x2 = start_pos.x(), end_pos.x()
def init_label(
self,
view_rect: QRectF,
) -> QLabel:
# TODO: heh, could probably use a max-min streamin algo here too
# should be init-ed in `.__init__()`
label: QLabel = self._label
cv: ChartView = self.vb
# https://doc.qt.io/qt-5/qgraphicsproxywidget.html
if self._label_proxy is None:
scen: QGraphicsScene = cv.scene()
# NOTE: specifically this is passing a widget
# pointer to the scene's `.addWidget()` as per,
# https://doc.qt.io/qt-5/qgraphicsproxywidget.html#embedding-a-widget-with-qgraphicsproxywidget
self._label_proxy: QGraphicsProxyWidget = scen.addWidget(label)
# get label startup coords
tl: QPointF = view_rect.topLeft()
br: QPointF = view_rect.bottomRight()
x1, y1 = tl.x(), tl.y()
x2, y2 = br.x(), br.y()
# TODO: to remove, previous label corner point unpacking
# x1, y1 = start_pos.x(), start_pos.y()
# x2, y2 = end_pos.x(), end_pos.y()
# y1, y2 = start_pos.y(), end_pos.y()
# x1, x2 = start_pos.x(), end_pos.x()
# TODO: heh, could probably use a max-min streamin algo
# here too?
_, xmn = min(y1, y2), min(x1, x2)
ymx, xmx = max(y1, y2), max(x1, x2)
@ -398,26 +536,35 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
ixmn, ixmx = round(xmn), round(xmx)
nbars = ixmx - ixmn + 1
chart = self._chart
data = chart.get_viz(chart.name).shm.array[ixmn:ixmx]
chart: ChartPlotWidget = self._chart
data: np.ndarray = chart.get_viz(
chart.name
).shm.array[ixmn:ixmx]
if len(data):
std = data['close'].std()
dmx = data['high'].max()
dmn = data['low'].min()
std: float = data['close'].std()
dmx: float = data['high'].max()
dmn: float = data['low'].min()
else:
dmn = dmx = std = np.nan
# update label info
self._label.setText('\n'.join(self._contents).format(
pchng=pchng, rng=rng, nbars=nbars,
std=std, dmx=dmx, dmn=dmn,
label.setText('\n'.join(self._contents).format(
pchng=pchng,
rng=rng,
nbars=nbars,
std=std,
dmx=dmx,
dmn=dmn,
))
# print(f'x2, y2: {(x2, y2)}')
# print(f'xmn, ymn: {(xmn, ymx)}')
label_anchor = Point(xmx + 2, ymx)
label_anchor = Point(
xmx + 2,
ymx,
)
# XXX: in the drag bottom-right -> top-left case we don't
# want the label to overlay the box.
@ -426,9 +573,11 @@ class SelectRect(QtWidgets.QGraphicsRectItem):
# # label_anchor = Point(x2, y2 + self._label.height())
# label_anchor = Point(xmn, ymn)
self._abs_top_right = label_anchor
self._label_proxy.setPos(self.vb.mapFromView(label_anchor))
# self._label.show()
self._abs_top_right: Point = label_anchor
self._label_proxy.setPos(
cv.mapFromView(label_anchor)
)
label.show()
def clear(self):
'''