Added method Viewport::recreateScrollbars()

modules/juce_gui_basics/layout/juce_Viewport.cpp

@@ -35,14 +35,10 @@ Viewport::Viewport (const String& name)  : Component (name)
 
     scrollBarThickness = getLookAndFeel().getDefaultScrollbarWidth();
 
-    addChildComponent (verticalScrollBar   = createScrollBarComponent (true));
-    addChildComponent (horizontalScrollBar = createScrollBarComponent (false));
-
-    getVerticalScrollBar().addListener (this);
-    getHorizontalScrollBar().addListener (this);
-
     setInterceptsMouseClicks (false, true);
     setWantsKeyboardFocus (true);
+
+    recreateScrollbars();
 }
 
 Viewport::~Viewport()
@@ -97,6 +93,20 @@ void Viewport::setViewedComponent (Component* const newViewedComponent, const bo
     }
 }
 
+void Viewport::recreateScrollbars()
+{
+    verticalScrollBar = nullptr;
+    horizontalScrollBar = nullptr;
+
+    addChildComponent (verticalScrollBar   = createScrollBarComponent (true));
+    addChildComponent (horizontalScrollBar = createScrollBarComponent (false));
+
+    getVerticalScrollBar().addListener (this);
+    getHorizontalScrollBar().addListener (this);
+
+    resized();
+}
+
 int Viewport::getMaximumVisibleWidth() const            { return contentHolder.getWidth(); }
 int Viewport::getMaximumVisibleHeight() const           { return contentHolder.getHeight(); }
 

modules/juce_gui_basics/layout/juce_Viewport.h

@@ -238,6 +238,9 @@ public:
     */
     ScrollBar& getHorizontalScrollBar() noexcept                { return *horizontalScrollBar; }
 
+    /** Re-instantiates the scrollbars, which is only really useful if you've overridden createScrollBarComponent(). */
+    void recreateScrollbars();
+
     /** True if there's any off-screen content that could be scrolled vertically,
         or false if everything is currently visible.
     */