Save the content ID of the item list in use

The content ID of the current item list is now saved and exposed via
the getContentID() method, to enable client code to more easily
manipulate the currently displayed list.

StdGadgetTree.cpp

@@ -180,6 +180,8 @@ void CStdGadgetTree::setContent(int a_contentID)
 {
 	ASSERTM((a_contentID >= 0), "CStdGadgetTree::setContent() => Invalid content ID passed in");
 
+	m_contentID = a_contentID;
+
 #ifdef __amigaos__
 
 	SetGadgetAttrs((struct Gadget *) m_poGadget, NULL, NULL, LISTBROWSER_Labels, (ULONG) NULL, TAG_DONE);
@@ -282,7 +284,9 @@ int CStdGadgetTree::setContent(StdList<CTreeNode> &a_items)
 
 #endif /* ! QT_GUI_LIB */
 
-	return m_nextContentID++;
+	m_contentID = m_nextContentID++;
+
+	return m_contentID;
 }
 
 /**

StdGadgets.h

@@ -412,6 +412,7 @@ class CStdGadgetTree : public CStdGadget
 {
 private:
 
+	int		m_contentID;					/**< The content ID of the file list currently in use */
 	int		m_nextContentID;				/**< The next content ID that will be assigned to a new list */
 
 #ifdef __amigaos__
@@ -466,6 +467,11 @@ class CStdGadgetTree : public CStdGadget
 
 public:
 
+	int getContentID()
+	{
+		return m_contentID;
+	}
+
 	std::string getSelectedItem();
 
 	void setContent(int a_contentID);