scrollbar store reference to pane

src/dialogxml/widgets/scrollbar.hpp

@@ -27,7 +27,7 @@ enum eScrollStyle {
 /// using the methods to get the scrollbar's position.
 /// Alternatively, it can be used as a slider control.
 class cScrollbar : public cControl, public iEventListener, public iDrawable {
-	std::string name;
+	cControl* pane;
 	int pos, max, pgsz;
 	std::string link;
 	// Make sure this is equal to the number of constants in eScrollStyle
@@ -66,6 +66,7 @@ class cScrollbar : public cControl, public iEventListener, public iDrawable {
 public:
 	/// @copydoc cDialog::init()
 	static void init();
+	inline void setPane(cControl* pane) { this->pane = pane; }
 	bool parseAttribute(ticpp::Attribute& attr, std::string tagName, std::string fname) override;
 	void validatePostParse(ticpp::Element& who, std::string fname, const std::set<std::string>& attrs, const std::multiset<std::string>& nodes) override;
 	location getPreferredSize() const override;

src/dialogxml/widgets/scrollpane.cpp

@@ -17,6 +17,7 @@
 #include <climits>
 
 cScrollPane::cScrollPane(cDialog& parent) : cContainer(CTRL_PANE, parent), scroll(parent) {
+	scroll.setPane(this);
 	recalcRect();
 }
 

src/dialogxml/widgets/scrollpane.hpp

@@ -25,6 +25,7 @@ class cScrollPane : public cContainer {
 public:
 	/// Create a new scroll pane
 	explicit cScrollPane(cDialog& parent);
+	inline cScrollbar& getScroll() { return scroll; }
 	bool parseAttribute(ticpp::Attribute& attr, std::string tagName, std::string fname) override;
 	bool parseContent(ticpp::Node& content, int n, std::string tagName, std::string fname, std::string& text) override;
 	void validatePostParse(ticpp::Element& who, std::string fname, const std::set<std::string>& attrs, const std::multiset<std::string>& nodes) override;