From 79dece31240de2be61ee1c495330ec1bdb36ff0b Mon Sep 17 00:00:00 2001
From: Arthur Milchior <Arthur@Milchior.fr>
Date: Mon, 30 Mar 2020 09:56:46 +0200
Subject: [PATCH] split _updatePreviewButtons

This will allow to create a hierarchy in this class
---
 qt/aqt/previewer.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/qt/aqt/previewer.py b/qt/aqt/previewer.py
index 9284c9fa1..242838a7b 100644
--- a/qt/aqt/previewer.py
+++ b/qt/aqt/previewer.py
@@ -260,18 +260,24 @@ class BrowserPreviewer(Previewer):
     def _updatePreviewButtons(self):
         if not self._previewWindow:
             return
+        self._previewPrev.setEnabled(self._should_enable_prev())
+        self._previewNext.setEnabled(self._should_enable_next())
+
+    def _should_enable_prev(self):
         current = self.parent.currentRow()
         canBack = current > 0 or (
             current == 0
             and self._previewState == "answer"
             and not self._previewBothSides
         )
-        self._previewPrev.setEnabled(bool(self.parent.singleCard and canBack))
+        return bool(self.parent.singleCard and canBack)
+
+    def _should_enable_next(self):
         canForward = (
             self.parent.currentRow() < self.parent.model.rowCount(None) - 1
             or self._previewState == "question"
         )
-        self._previewNext.setEnabled(bool(self.parent.singleCard and canForward))
+        return bool(self.parent.singleCard and canForward)
 
     def _onClosePreview(self):
         super()._onClosePreview()