Fixed issue where fit to bounds would be lost when changing document (#…

…564) This issue doesn't affect vpype per se as documents are never changed during the lifetime of a viewer, but it does affect vsketch in cases where sketches change their own page size (e.g. the `quick_draw` example. Fixes #458
abey79 · Oct 16, 2022 · fe70ed4 · fe70ed4
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -14,6 +14,7 @@ Release date: UNRELEASED
 ### Bug fixes
 
 * Fixed a viewer issue where page width/height of 0 would lead to errors and a blank display (#555)
+* Fixed a viewer issue where fitting the document bounds would be lost when bounds change (*vsketch* only) (#564)
 
 ### API changes
 

diff --git a/poetry.lock b/poetry.lock
diff --git a/vpype_viewer/engine.py b/vpype_viewer/engine.py
@@ -126,6 +126,11 @@ def document(self) -> vp.Document | None:
     def document(self, document: vp.Document | None) -> None:
         self._document = document
         self._layer_visibility.clear()
+
+        # keep fitted to the viewport
+        if self._fit_to_viewport_flag:
+            self.fit_to_viewport()
+
         self._update()
 
     @property