Viewport: Added the ability to position the scrollbars at the top/left

modules/juce_gui_basics/layout/juce_Viewport.cpp

@@ -360,6 +360,12 @@ void Viewport::updateVisibleArea()
         if (vBarVisible)  contentArea.setWidth  (getWidth()  - scrollbarWidth);
         if (hBarVisible)  contentArea.setHeight (getHeight() - scrollbarWidth);
 
+        if (! vScrollbarRight  && vBarVisible)
+            contentArea.setX (scrollbarWidth);
+
+        if (! hScrollbarBottom && hBarVisible)
+            contentArea.setY (scrollbarWidth);
+
         if (contentComp == nullptr)
         {
             contentHolder.setBounds (contentArea);
@@ -383,7 +389,7 @@ void Viewport::updateVisibleArea()
     auto& hbar = getHorizontalScrollBar();
     auto& vbar = getVerticalScrollBar();
 
-    hbar.setBounds (0, contentArea.getHeight(), contentArea.getWidth(), scrollbarWidth);
+    hbar.setBounds (contentArea.getX(), hScrollbarBottom ? contentArea.getHeight() : 0, contentArea.getWidth(), scrollbarWidth);
     hbar.setRangeLimits (0.0, contentBounds.getWidth());
     hbar.setCurrentRange (visibleOrigin.x, contentArea.getWidth());
     hbar.setSingleStepSize (singleStepX);
@@ -392,7 +398,7 @@ void Viewport::updateVisibleArea()
     if (canShowHBar && ! hBarVisible)
         visibleOrigin.setX (0);
 
-    vbar.setBounds (contentArea.getWidth(), 0, scrollbarWidth, contentArea.getHeight());
+    vbar.setBounds (vScrollbarRight ? contentArea.getWidth() : 0, contentArea.getY(), scrollbarWidth, contentArea.getHeight());
     vbar.setRangeLimits (0.0, contentBounds.getHeight());
     vbar.setCurrentRange (visibleOrigin.y, contentArea.getHeight());
     vbar.setSingleStepSize (singleStepY);
@@ -599,4 +605,13 @@ ScrollBar* Viewport::createScrollBarComponent (bool isVertical)
     return new ScrollBar (isVertical);
 }
 
+void Viewport::setScrollBarPosition (bool verticalScrollbarOnRight,
+                                     bool horizontalScrollbarAtBottom)
+{
+    vScrollbarRight  = verticalScrollbarOnRight;
+    hScrollbarBottom = horizontalScrollbarAtBottom;
+
+    resized();
+}
+
 } // namespace juce

modules/juce_gui_basics/layout/juce_Viewport.h

@@ -204,6 +204,25 @@ public:
                              bool allowVerticalScrollingWithoutScrollbar = false,
                              bool allowHorizontalScrollingWithoutScrollbar = false);
 
+    /** Changes where the scroll bars are positioned
+
+        If verticalScrollbarOnRight is set to true, then the vertical scrollbar will
+        appear on the right side of the view port's content (this is the default),
+        otherwise it will be on the left side of the content.
+
+        If horizontalScrollbarAtBottom is set to true, then the horizontal scrollbar
+        will appear at the bottom of the view port's content (this is the default),
+        otherwise it will be at the top.
+    */
+    void setScrollBarPosition (bool verticalScrollbarOnRight,
+                               bool horizontalScrollbarAtBottom);
+
+    /** True if the vertical scrollbar will appear on the right side of the content */
+    bool isVerticalScrollbarOnTheRight() const noexcept         { return vScrollbarRight; }
+
+    /** True if the horizontal scrollbar will appear at the bottom of the content */
+    bool isHorizontalScrollbarAtBottom() const noexcept         { return hScrollbarBottom; }
+
     /** True if the vertical scrollbar is enabled.
         @see setScrollBarsShown
     */
@@ -300,6 +319,7 @@ private:
     bool showHScrollbar = true, showVScrollbar = true, deleteContent = true;
     bool customScrollBarThickness = false;
     bool allowScrollingWithoutScrollbarV = false, allowScrollingWithoutScrollbarH = false;
+    bool vScrollbarRight = true, hScrollbarBottom = true;
 
     struct DragToScrollListener;
     friend struct DragToScrollListener;