Add pglive patch for setting y-axis min range span

flake.nix

@@ -62,6 +62,7 @@
           inherit pname version;
           hash = "sha256-jqj8X6H1N5mJQ4OrY5ANqRB0YJByqg/bNneEALWmH1A=";
         };
+        patches = ./patches/0001-Add-option-for-setting-min-range-span-for-y-axis.patch;
         buildInputs = [ pkgs.python3Packages.poetry-core ];
         propagatedBuildInputs = with pkgs.python3Packages; [ pyqtgraph numpy ];
       };

patches/0001-Add-option-for-setting-min-range-span-for-y-axis.patch

@@ -0,0 +1,61 @@
+From 59a14e06320fd42d56cd7d953da337c0fe4357fa Mon Sep 17 00:00:00 2001
+From: linuswck <linuswck@m-labs.hk>
+Date: Tue, 22 Oct 2024 17:30:36 +0800
+Subject: [PATCH] Add option for setting min range span for y-axis
+
+---
+ pglive/sources/live_axis_range.py | 17 ++++++++++++++++-
+ 1 file changed, 16 insertions(+), 1 deletion(-)
+
+diff --git a/pglive/sources/live_axis_range.py b/pglive/sources/live_axis_range.py
+index afbd806..9b62ba5 100644
+--- a/pglive/sources/live_axis_range.py
++++ b/pglive/sources/live_axis_range.py
+@@ -5,7 +5,7 @@ from typing import Optional, List, Tuple, Dict
+ class LiveAxisRange:
+ 
+     def __init__(self, roll_on_tick: int = 1, offset_left: float = 0., offset_right: float = 0., offset_top: float = 0.,
+-                 offset_bottom: float = 0., fixed_range: Optional[List[float]] = None) -> None:
++                 offset_bottom: float = 0., fixed_range: Optional[List[float]] = None, min_y_range_span: Optional[List[float]] = [None, None]) -> None:
+         self.roll_on_tick = roll_on_tick
+         self.offset_left = offset_left
+         self.offset_right = offset_right
+@@ -21,6 +21,7 @@ class LiveAxisRange:
+         self.final_x_range = [0., 0.]
+         self.final_y_range = [0., 0.]
+         self.ignored_data_connectors: List[str] = []
++        self.min_y_range_span = min_y_range_span
+ 
+     def get_x_range(self, data_connector, tick: int) -> List[float]:
+         x, _ = data_connector.plot.getData()
+@@ -116,6 +117,13 @@ class LiveAxisRange:
+             # therefore in that case we must set some range
+             final_range[0] -= 0.4
+             final_range[1] += 0.4
++
++        if self.min_y_range_span[0] is not None:
++            final_range[0] = min(self.min_y_range_span[0], final_range[0])
++
++        if self.min_y_range_span[1] is not None:
++            final_range[1] = max(self.min_y_range_span[1], final_range[1])
++
+         if self.final_y_range != final_range:
+             self.final_y_range = final_range
+         return self.final_y_range
+@@ -139,6 +147,13 @@ class LiveAxisRange:
+             # therefore in that case we must set some range
+             final_range[0] -= 0.4
+             final_range[1] += 0.4
++        
++        if self.min_y_range_span[0] is not None:
++            final_range[0] = min(self.min_y_range_span[0], final_range[0])
++
++        if self.min_y_range_span[1] is not None:
++            final_range[1] = max(self.min_y_range_span[1], final_range[1])
++
+         if self.final_y_range != final_range:
+             self.final_y_range = final_range
+         return self.final_y_range
+-- 
+2.44.1
+