CComponentsFooter: add members to set or get select a defined button

Origin commit data
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Commit: cc5b17a620
Author: Thilo Graf <dbt@novatux.de>
Date: 2014-08-25 (Mon, 25 Aug 2014)

src/gui/components/cc_frm_footer.h

@@ -97,6 +97,11 @@ class CComponentsFooter : public CComponentsHeader
 		///causes show/hide countour of button frame and background, parameter bool show, default= true
 		void showButtonContour(bool show = true);
 
+		///select a definied button, parameter1 as size_t
+		void setSelectedButton(size_t item_id);
+		///returns id of select button, return value as int, -1 = nothing is selected
+		int getSelectedButton();
+
 		///property: set font for label caption, parameter as font object, value NULL causes usage of dynamic font
 		void setButtonFont(Font* font){ccf_btn_font = font;};