Plots: Save scrollbars positions and restore them after loading a plot

spyder/plugins/plots/widgets/figurebrowser.py

@@ -393,6 +393,14 @@ def __init__(self, parent=None, background_color=None):
         # An internal flag that tracks when the figure is being panned.
         self._ispanning = False
 
+        # To save scrollbar values in the current thumbnail
+        self.verticalScrollBar().valueChanged.connect(
+            self._set_vscrollbar_value
+        )
+        self.horizontalScrollBar().valueChanged.connect(
+            self._set_hscrollbar_value
+        )
+
     @property
     def auto_fit_plotting(self):
         """
@@ -468,6 +476,20 @@ def load_figure(self, fig, fmt):
         if self.current_thumbnail.scalefactor is None:
             self.current_thumbnail.scalefactor = self.scalefactor
 
+        # Restore scrollbar values
+        QTimer.singleShot(
+            20,
+            lambda: self.verticalScrollBar().setValue(
+                self.current_thumbnail.vscrollbar_value
+            ),
+        )
+        QTimer.singleShot(
+            20,
+            lambda: self.horizontalScrollBar().setValue(
+                self.current_thumbnail.hscrollbar_value
+            ),
+        )
+
     def eventFilter(self, widget, event):
         """A filter to control the zooming and panning of the figure canvas."""
 
@@ -635,6 +657,16 @@ def _adjust_scrollbar(self, f):
         vb = self.verticalScrollBar()
         vb.setValue(int(f * vb.value() + ((f - 1) * vb.pageStep()/2)))
 
+    def _set_vscrollbar_value(self, value):
+        """Save vertical scrollbar value in current thumbnail."""
+        if self.current_thumbnail is not None:
+            self.current_thumbnail.vscrollbar_value = value
+
+    def _set_hscrollbar_value(self, value):
+        """Save horizontal scrollbar value in current thumbnail."""
+        if self.current_thumbnail is not None:
+            self.current_thumbnail.hscrollbar_value = value
+
 
 class ThumbnailScrollBar(QFrame):
     """
@@ -1166,6 +1198,8 @@ def __init__(self, parent=None, background_color=None, auto_fit=True):
 
         self.auto_fit = auto_fit
         self.scalefactor = None
+        self.vscrollbar_value = 0
+        self.hscrollbar_value = 0
 
         self.canvas = FigureCanvas(
             parent=self,