From 6df2c3d0094039465747601eb68e3b63afaaa3a0 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Tue, 28 Feb 2023 16:02:01 -0500
Subject: [PATCH] Simplify `FlowGraphics.x_last()` logics

---
 piker/ui/_curve.py | 5 ++++-
 piker/ui/_ohlc.py  | 9 +++++----
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/piker/ui/_curve.py b/piker/ui/_curve.py
index 013448f3..052a94a3 100644
--- a/piker/ui/_curve.py
+++ b/piker/ui/_curve.py
@@ -158,7 +158,10 @@ class FlowGraphic(pg.GraphicsObject):
         drawn yet, ``None``.
 
         '''
-        return self._last_line.x1() if self._last_line else None
+        if self._last_line:
+            return self._last_line.x1()
+
+        return None
 
 
 class Curve(FlowGraphic):
diff --git a/piker/ui/_ohlc.py b/piker/ui/_ohlc.py
index 344805e8..25ebb591 100644
--- a/piker/ui/_ohlc.py
+++ b/piker/ui/_ohlc.py
@@ -93,7 +93,7 @@ class BarItems(FlowGraphic):
     '''
     # XXX: causes this weird jitter bug when click-drag panning
     # where the path curve will awkwardly flicker back and forth?
-    # cache_mode: int = QGraphicsItem.NoCache
+    cache_mode: int = QGraphicsItem.NoCache
 
     def __init__(
         self,
@@ -113,9 +113,10 @@ class BarItems(FlowGraphic):
         '''
         if self._last_bar_lines:
             close_arm_line = self._last_bar_lines[-1]
-            return close_arm_line.x2() if close_arm_line else None
-        else:
-            return None
+            if close_arm_line:
+                return close_arm_line.x2()
+
+        return None
 
     # Qt docs: https://doc.qt.io/qt-5/qgraphicsitem.html#boundingRect
     def boundingRect(self):