Revision: 16441
          http://sourceforge.net/p/skim-app/code/16441
Author:   hofman
Date:     2026-09-10 14:02:01 +0000 (Thu, 10 Sep 2026)
Log Message:
-----------
go back to observing NSSplitViewDidResizeSubviewsNotification instead of side 
pane view frames and collapsed states. The problem appears to be local to the 
user.

Modified Paths:
--------------
    trunk/SKMainWindowController.m
    trunk/SKMainWindowController_UI.h
    trunk/SKMainWindowController_UI.m

Modified: trunk/SKMainWindowController.m
===================================================================
--- trunk/SKMainWindowController.m      2026-09-09 22:00:52 UTC (rev 16440)
+++ trunk/SKMainWindowController.m      2026-09-10 14:02:01 UTC (rev 16441)
@@ -2752,13 +2752,10 @@
         if ([[change objectForKey:NSKeyValueChangeNotificationIsPriorKey] 
boolValue]) {
             if ([item isCollapsed] == NO && [[self window] 
firstResponderIsDescendantOf:[[item viewController] view]])
                 [[self window] makeFirstResponder:pdfView];
-        } else {
-            if ([item viewController] == leftSideController)
-                [toolbarController leftSidePaneDidShowOrHide:[item 
isCollapsed] == NO];
-            else if ([item viewController] == rightSideController)
-                [toolbarController rightSidePaneDidShowOrHide:[item 
isCollapsed] == NO];
-            if ([[[self window] frameAutosaveName] length] && [self 
interactionMode] == SKNormalMode)
-                [self performSelectorOnce:@selector(sidePaneWidthDidChange) 
afterDelay:0.0];
+        } else if ([item viewController] == leftSideController) {
+            [toolbarController leftSidePaneDidShowOrHide:[item isCollapsed] == 
NO];
+        } else if ([item viewController] == rightSideController) {
+            [toolbarController rightSidePaneDidShowOrHide:[item isCollapsed] 
== NO];
         }
         
     } else if (context == &SKPDFAnnotationPropertiesObservationContext) {

Modified: trunk/SKMainWindowController_UI.h
===================================================================
--- trunk/SKMainWindowController_UI.h   2026-09-09 22:00:52 UTC (rev 16440)
+++ trunk/SKMainWindowController_UI.h   2026-09-10 14:02:01 UTC (rev 16441)
@@ -52,8 +52,6 @@
 
 - (void)handlePageChangedNotification:(nullable NSNotification *)notification;
 
-- (void)sidePaneWidthDidChange;
-
 - (NSInteger)thumbnailHighlightLevelForRow:(NSInteger)row;
 
 - (void)updateTocSelectionHighlights;

Modified: trunk/SKMainWindowController_UI.m
===================================================================
--- trunk/SKMainWindowController_UI.m   2026-09-09 22:00:52 UTC (rev 16440)
+++ trunk/SKMainWindowController_UI.m   2026-09-10 14:02:01 UTC (rev 16441)
@@ -2108,7 +2108,7 @@
     }
 }
 
-- (void)handleSidePaneViewFrameDidChangeNotification:(NSNotification 
*)notification {
+- (void)handleSplitviewDidResizeSubviewsNotification:(NSNotification 
*)notification {
     if ([self interactionMode] == SKNormalMode)
         [self performSelectorOnce:@selector(sidePaneWidthDidChange) 
afterDelay:0.0];
 }
@@ -2140,12 +2140,9 @@
     [nc addObserver:self 
selector:@selector(handlePageLabelsChangedNotification:)
                              name:SKPDFPageLabelsChangedNotification 
object:nil];
     // NSSplitView
-    if ([[[self window] frameAutosaveName] length]) {
-        [nc addObserver:self 
selector:@selector(handleSidePaneViewFrameDidChangeNotification:)
-                   name:NSViewFrameDidChangeNotification 
object:leftSideController.view];
-        [nc addObserver:self 
selector:@selector(handleSidePaneViewFrameDidChangeNotification:)
-                   name:NSViewFrameDidChangeNotification 
object:rightSideController.view];
-    }
+    if ([[[self window] frameAutosaveName] length])
+        [nc addObserver:self 
selector:@selector(handleSplitviewDidResizeSubviewsNotification:)
+                   name:NSSplitViewDidResizeSubviewsNotification 
object:[splitViewController splitView]];
 }
 
 @end

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