(svn r21447) -Add: accessor function to get the direction of a scrollbar

src/widget.cpp

@@ -1624,7 +1624,7 @@ int Scrollbar::GetScrolledRowFromWidget(int clickpos, const Window * const w, in
 void Scrollbar::SetCapacityFromWidget(Window *w, int widget, int padding)
 {
 	NWidgetBase *nwid = w->GetWidget<NWidgetBase>(widget);
-	if (this->is_vertical) {
+	if (this->IsVertical()) {
 		this->SetCapacity(((int)nwid->current_y - padding) / (int)nwid->resize_y);
 	} else {
 		this->SetCapacity(((int)nwid->current_x - padding) / (int)nwid->resize_x);

src/widget_type.h

@@ -559,6 +559,15 @@ public:
 		return IsInsideBS(item, this->GetPosition(), this->GetCapacity());
 	}
 
+	/**
+	 * Is the scrollbar vertical or not?
+	 * @return True iff the scrollbar is vertical.
+	 */
+	FORCEINLINE bool IsVertical() const
+	{
+		return this->is_vertical;
+	}
+
 	/**
 	 * Sets the number of elements in the list
 	 * @param num the number of elements in the list