Reader now warns about invalid UTF-8 files;

Fixed possible hang when reading multiline strings with incorrect indentation;
Warnings from reading are shown also in NewSetWindow;
Script parse errors get reported with the correct line number;

Added support for showing multiple choice fields as a single image;
Added 'line_below' to ChoiceField::Choice, for putting a line below menu items.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@420 0fc631ac-6414-0410-93d0-97cfa31319b6

src/gui/drop_down_list.hpp

@@ -40,6 +40,10 @@ class DropDownList : public wxPopupWindow {
 	bool onMouseInParent(wxMouseEvent&, bool open_in_place);
   
   protected:
+	
+	/// Prepare for showing the list
+	virtual void onShow() {}
+	
 	// --------------------------------------------------- : Selection
 	static const size_t NO_SELECTION = (size_t)-1;
 	
@@ -59,6 +63,8 @@ class DropDownList : public wxPopupWindow {
 	virtual bool lineBelow(size_t item)        const { return false; }
 	/// Should the item be highlighted?
 	virtual bool highlightItem(size_t item)    const { return false; }
+	/// Is the item enabled?
+	virtual bool itemEnabled(size_t item)      const { return true; }
 	// An extra submenu that pops up from an item, or null if there is no popup menu
 	virtual DropDownList* submenu(size_t item) const { return nullptr; }