fix, bug is described in c1a0ed2799

src/ce_editor.pas

@@ -12,6 +12,13 @@ uses
 
 type
 
+  // this descendant propagates the Visible property to the children.
+  // this fix the bug described in commit c1a0ed2799390d788b1d1e435eb8dc1ed3369ce7
+  TCEEditorPage = class(TTabSheet)
+  protected
+    procedure SetVisible(Value: Boolean); override;
+  end;
+
   { TCEEditorWidget }
   TCEEditorWidget = class(TCEWidget, ICEMultiDocObserver)
     imgList: TImageList;
@@ -72,6 +79,17 @@ implementation
 uses
   ce_main;
 
+
+procedure TCEEditorPage.SetVisible(Value: Boolean);
+var
+  i: integer;
+begin
+  inherited;
+  for i := 0 to ComponentCount-1 do
+    if (Components[i] is TWinControl) then
+      TWinControl(Components[i]).Visible:= Value;
+end;
+
 {$REGION Standard Comp/Obj------------------------------------------------------}
 constructor TCEEditorWidget.create(aOwner: TComponent);
 var
@@ -205,11 +223,12 @@ end;
 
 procedure TCEEditorWidget.addEditor;
 var
-  sheet: TTabSheet;
+  sheet: TCEEditorPage;
   memo: TCESynMemo;
 begin
-  sheet := pageControl.AddTabSheet;
+  sheet := TCEEditorPage.Create(self);
   memo  := TCESynMemo.Create(sheet);
+  sheet.PageControl := PageControl;
   //
   memo.Align := alClient;
   memo.Parent := sheet;

src/ce_synmemo.pas

@@ -97,7 +97,6 @@ type
     constructor Create(aOwner: TComponent); override;
     destructor destroy; override;
     procedure setFocus; override;
-    procedure UpdateShowing; override;
     procedure DoEnter; override;
     //
     procedure checkFileDate;
@@ -359,7 +358,6 @@ end;
 procedure TCESynMemo.setFocus;
 begin
   inherited;
-  if not Visible then exit;
   checkFileDate;
   identifierToD2Syn;
   subjDocFocused(TCEMultiDocSubject(fMultiDocSubject), self);
@@ -374,20 +372,11 @@ begin
   subjDocFocused(TCEMultiDocSubject(fMultiDocSubject), self);
 end;
 
-procedure TCESynMemo.UpdateShowing;
-begin
-  inherited;
-  identifierToD2Syn;
-  subjDocFocused(TCEMultiDocSubject(fMultiDocSubject), self);
-end;
-
 procedure TCESynMemo.DoEnter;
 begin
   Inherited;
   checkFileDate;
   identifierToD2Syn;
-  // produces too much updates in the widgets
-  //subjDocFocused(TCEMultiDocSubject(fMultiDocSubject), self);
 end;
 
 procedure TCESynMemo.SetHighlighter(const Value: TSynCustomHighlighter);