IrrlichtMt: import scrollbar changes

irr/include/CGUIEditBox.h

@@ -10,6 +10,9 @@
 
 namespace gui
 {
+
+class IGUIScrollBar;
+
 class CGUIEditBox : public IGUIEditBox
 {
 public:
@@ -157,6 +160,8 @@ protected:
 	void sendGuiEvent(EGUI_EVENT_TYPE type);
 	//! set text markers
 	void setTextMarkers(s32 begin, s32 end);
+	//! update the vertical scrollBar (visibilty & position)
+	void updateVScrollBar();
 
 	bool processKey(const SEvent &event);
 	//! KEY_LEFT / KEY_RIGHT inputs
@@ -193,6 +198,8 @@ protected:
 	s32 CursorPos;
 	s32 HScrollPos, VScrollPos; // scroll position in characters
 	u32 Max;
+	u32 VScrollBarWidth = 0;
+	IGUIScrollBar *VScrollBar = nullptr;
 
 	bool WordWrap = false,
 		MultiLine = false,

irr/include/IGUIScrollBar.h

@@ -51,6 +51,11 @@ public:
 
 	//! sets the current position of the scrollbar
 	virtual void setPos(s32 pos) = 0;
+
+	//! For automatic thumb scaling
+	/** Sets the full height (e.g. content to scroll), in pixels.
+	Set to 0 to disable (default). */
+	virtual void setPageSize(s32 size) = 0;
 };
 
 } // end namespace gui