Compact L1 labels

piker/ui/_axes.py

@@ -306,7 +306,10 @@ def _indexes_to_timestrs(
         times = array['time']
         i_0, i_l = times[0], times[-1]
 
+        # edge cases
         if (
+            not indexes
+            or
             (indexes[0] < i_0
              and indexes[-1] < i_l)
             or

piker/ui/_chart.py

@@ -829,8 +829,6 @@ class ChartPlotWidget(pg.PlotWidget):
     sig_mouse_leave = QtCore.pyqtSignal(object)
     sig_mouse_enter = QtCore.pyqtSignal(object)
 
-    _l1_labels: L1Labels = None
-
     mode_name: str = 'view'
 
     # TODO: can take a ``background`` color setting - maybe there's
@@ -986,13 +984,15 @@ def marker_right_points(
         '''
         # TODO: compute some sensible maximum value here
         # and use a humanized scheme to limit to that length.
-        l1_len = self._max_l1_line_len
+        from ._l1 import L1Label
+        l1_len = abs(L1Label._x_br_offset)
         ryaxis = self.getAxis('right')
 
         r_axis_x = ryaxis.pos().x()
         up_to_l1_sc = r_axis_x - l1_len
         marker_right = up_to_l1_sc - (1.375 * 2 * marker_size)
-        line_end = marker_right - (6/16 * marker_size)
+        # line_end = marker_right - (6/16 * marker_size)
+        line_end = marker_right - marker_size
 
         # print(
         #     f'r_axis_x: {r_axis_x}\n'
@@ -1231,7 +1231,8 @@ def draw_curve(
                 # (we need something that avoids clutter on x-axis).
                 axis.add_sticky(
                     pi=pi,
-                    bg_color=color,
+                    fg_color='black',
+                    # bg_color=color,
                     digits=digits,
                 )
 

piker/ui/_cursor.py

@@ -71,7 +71,7 @@ def __init__(
 
         plot: ChartPlotWidget,  # type: ingore # noqa
         pos=None,
-        color: str = 'default_light',
+        color: str = 'bracket',
 
     ) -> None:
         # scale from dpi aware font size
@@ -349,7 +349,7 @@ def __init__(
         # XXX: not sure why these are instance variables?
         # It's not like we can change them on the fly..?
         self.pen = pg.mkPen(
-            color=hcolor('default'),
+            color=hcolor('bracket'),
             style=QtCore.Qt.DashLine,
         )
         self.lines_pen = pg.mkPen(
@@ -365,7 +365,7 @@ def __init__(
         self._lw = self.pixelWidth() * self.lines_pen.width()
 
         # xhair label's color name
-        self.label_color: str = 'default'
+        self.label_color: str = 'bracket'
 
         self._y_label_update: bool = True
 

piker/ui/_dataviz.py

@@ -217,6 +217,9 @@ def render_baritems(
     )
 
 
+_sample_rates: set[float] = {1, 60}
+
+
 class Viz(msgspec.Struct):  # , frozen=True):
     '''
     (Data) "Visualization" compound type which wraps a real-time
@@ -284,15 +287,33 @@ def index_step(
         reset: bool = False,
 
     ) -> float:
+
+        # attempt to dectect the best step size by scanning a sample of
+        # the source data.
         if self._index_step is None:
+
             index = self.shm.array[self.index_field]
             isample = index[:16]
-            mxdiff = np.diff(isample).max()
+
+            mxdiff: None | float = None
+            for step in np.diff(isample):
+                if step in _sample_rates:
+                    if (
+                        mxdiff is not None
+                        and step != mxdiff
+                    ):
+                        raise ValueError(
+                            f'Multiple step sizes detected? {mxdiff}, {step}'
+                        )
+                    mxdiff = step
+
             self._index_step = max(mxdiff, 1)
             if (
                 mxdiff < 1
                 or 1 < mxdiff < 60
             ):
+                # TODO: remove this once we're sure the above scan loop
+                # is rock solid.
                 breakpoint()
 
         return self._index_step