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Code Issues 4 Pull Requests 6 Packages Projects Releases Wiki Activity

Optimize axis labels using `QPicture` 

This is likely a marginal improvement but is slightly less execution and
adds a coolio black border around the label. Drop all the legacy code
from quantdom which was quite a convoluted mess for "coloring".
Had to tweak sticky offsets to get the crosshair to line up right; not
sure what that's all about yet.
bar_select
Tyler Goodlet 2020-10-24 20:04:57 -04:00
parent 13f32acfdf
commit 94a8ee6270
1 changed files with 30 additions and 38 deletions
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68
piker/ui/_axes.py
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@ -95,17 +95,13 @@ class DynamicDateAxis(pg.AxisItem):
class AxisLabel(pg.GraphicsObject):
# bg_color = pg.mkColor('#a9a9a9')
bg_color = pg.mkColor(hcolor('pikers'))
fg_color = pg.mkColor(hcolor('black'))
def __init__(
self,
parent=None,
digits=2,
color=None,
opacity=1,
**kwargs
parent: pg.GraphicsObject,
digits: int = 2,
bg_color: str = 'bracket',
fg_color: str = 'black',
opacity: int = 1,
):
super().__init__(parent)
self.parent = parent
@ -113,33 +109,31 @@ class AxisLabel(pg.GraphicsObject):
self.label_str = ''
self.digits = digits
# some weird color convertion logic?
if isinstance(color, QtGui.QPen):
self.bg_color = color.color()
self.fg_color = pg.mkColor(hcolor('black'))
elif isinstance(color, list):
self.bg_color = {'>0': color[0].color(), '<0': color[1].color()}
self.fg_color = pg.mkColor(hcolor('white'))
self.bg_color = pg.mkColor(hcolor(bg_color))
self.fg_color = pg.mkColor(hcolor(fg_color))
self.pic = QtGui.QPicture()
p = QtGui.QPainter(self.pic)
self.rect = QtCore.QRectF(0, 0, 40, 11)
p.setPen(self.fg_color)
p.setOpacity(self.opacity)
p.fillRect(self.rect, self.bg_color)
# this adds a nice black outline around the label for some odd
# reason; ok by us
p.drawRect(self.rect)
self.setFlag(self.ItemIgnoresTransformations)
def paint(self, p, option, widget):
p.setRenderHint(p.TextAntialiasing, True)
p.setPen(self.fg_color)
if self.label_str:
if not isinstance(self.bg_color, dict):
bg_color = self.bg_color
else:
if int(self.label_str.replace(' ', '')) > 0:
bg_color = self.bg_color['>0']
else:
bg_color = self.bg_color['<0']
p.setOpacity(self.opacity)
p.fillRect(option.rect, bg_color)
p.setOpacity(1)
p.setFont(_font)
p.drawPicture(0, 0, self.pic)
p.drawText(option.rect, self.text_flags, self.label_str)
if self.label_str:
p.setFont(_font)
p.setPen(self.fg_color)
p.drawText(self.rect, self.text_flags, self.label_str)
# uggggghhhh
@ -170,22 +164,21 @@ class XAxisLabel(AxisLabel):
QtCore.Qt.TextDontClip
| QtCore.Qt.AlignCenter
# | QtCore.Qt.AlignTop
| QtCore.Qt.AlignVCenter
# | QtCore.Qt.AlignVCenter
# | QtCore.Qt.AlignHCenter
)
# text_flags = _common_text_flags
def boundingRect(self): # noqa
# TODO: we need to get the parent axe's dimensions transformed
# to abs coords to be 100% correct here:
# self.parent.boundingRect()
return QtCore.QRectF(0, 2, 40, 10)
return QtCore.QRectF(0, 0, 40, 11)
def update_label(
self,
abs_pos: QPointF, # scene coords
data: float, # data for text
offset: int = 0 # if have margins, k?
offset: int = 1 # if have margins, k?
) -> None:
timestrs = self.parent._indexes_to_timestrs([int(data)])
if not timestrs.any():
@ -198,7 +191,6 @@ class XAxisLabel(AxisLabel):
class YAxisLabel(AxisLabel):
# text_flags = _common_text_flags
text_flags = (
QtCore.Qt.AlignLeft
| QtCore.Qt.TextDontClip
@ -210,13 +202,13 @@ class YAxisLabel(AxisLabel):
return ('{: ,.%df}' % self.digits).format(tick_pos).replace(',', ' ')
def boundingRect(self): # noqa
return QtCore.QRectF(0, 0, 50, 11)
return QtCore.QRectF(0, 0, 50, 10)
def update_label(
self,
abs_pos: QPointF, # scene coords
data: float, # data for text
offset: int = 0 # if have margins, k?
offset: int = 1 # if have margins, k?
) -> None:
self.label_str = self.tick_to_string(data)
height = self.boundingRect().height()