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Code Issues 4 Pull Requests 6 Packages Projects Releases Wiki Activity

Fix bottom axis check logic for overlays, try out some px perfection

vlm_plotz
Tyler Goodlet 2022-01-21 08:39:03 -05:00
parent 00b1b2a10c
commit edd227228c
1 changed files with 36 additions and 23 deletions
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59
piker/ui/_cursor.py
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@ -369,7 +369,13 @@ class Cursor(pg.GraphicsObject):
self,
plot: 'ChartPlotWidget', # noqa
digits: int = 0,
) -> None:
'''
Add chart to tracked set such that a cross-hair and possibly
curve tracking cursor can be drawn on the plot.
'''
# add ``pg.graphicsItems.InfiniteLine``s
# vertical and horizonal lines and a y-axis label
@ -382,7 +388,8 @@ class Cursor(pg.GraphicsObject):
yl = YAxisLabel(
chart=plot,
parent=plot.getAxis('right'),
# parent=plot.getAxis('right'),
parent=plot.pi_overlay.get_axis(plot.plotItem, 'right'),
digits=digits or self.digits,
opacity=_ch_label_opac,
bg_color=self.label_color,
@ -424,19 +431,25 @@ class Cursor(pg.GraphicsObject):
# ONLY create an x-axis label for the cursor
# if this plot owns the 'bottom' axis.
if 'bottom' in plot.plotItem.axes:
self.xaxis_label = XAxisLabel(
# if 'bottom' in plot.plotItem.axes:
if plot.linked.xaxis_chart is plot:
xlabel = self.xaxis_label = XAxisLabel(
parent=self.plots[plot_index].getAxis('bottom'),
# parent=self.plots[plot_index].pi_overlay.get_axis(plot.plotItem, 'bottom'),
opacity=_ch_label_opac,
bg_color=self.label_color,
)
# place label off-screen during startup
self.xaxis_label.setPos(self.plots[0].mapFromView(QPointF(0, 0)))
xlabel.setPos(
self.plots[0].mapFromView(QPointF(0, 0))
)
xlabel.show()
def add_curve_cursor(
self,
plot: 'ChartPlotWidget', # noqa
curve: 'PlotCurveItem', # noqa
) -> LineDot:
# if this plot contains curves add line dot "cursors" to denote
# the current sample under the mouse
@ -493,24 +506,27 @@ class Cursor(pg.GraphicsObject):
ix = round(x) # since bars are centered around index
# px perfect...
line_offset = self._lw / 2
# round y value to nearest tick step
m = self._y_incr_mult
iy = round(y * m) / m
# px perfect...
line_offset = self._lw / 2
vl_y = iy - line_offset
# update y-range items
if iy != last_iy:
if self._y_label_update:
self.graphics[self.active_plot]['yl'].update_label(
abs_pos=plot.mapFromView(QPointF(ix, iy)),
# abs_pos=plot.mapFromView(QPointF(ix, iy)),
abs_pos=plot.mapFromView(QPointF(ix, vl_y)),
value=iy
)
# only update horizontal xhair line if label is enabled
self.graphics[plot]['hl'].setY(iy)
# self.graphics[plot]['hl'].setY(iy)
self.graphics[plot]['hl'].setY(vl_y)
# update all trackers
for item in self._trackers:
@ -541,21 +557,18 @@ class Cursor(pg.GraphicsObject):
# left axis offset width for calcuating
# absolute x-axis label placement.
left_axis_width = 0
left = axes.get('left')
if left:
left_axis_width = left['item'].width()
if 'bottom' in axes:
left = axes.get('left')
if left:
left_axis_width = left['item'].width()
# map back to abs (label-local) coordinates
self.xaxis_label.update_label(
abs_pos=(
plot.mapFromView(QPointF(vl_x, iy)) -
QPointF(left_axis_width, 0)
),
value=ix,
)
# map back to abs (label-local) coordinates
self.xaxis_label.update_label(
abs_pos=(
plot.mapFromView(QPointF(vl_x, iy)) -
QPointF(left_axis_width, 0)
),
value=ix,
)
self._datum_xy = ix, iy