CComponents: implement scroll functionality into CComponentsForm

CComponentsForm provides page scroll if found more
than one pre defined page and is working with all derivated sub classes from CComponentsForm .

Pages are defined with setPageNumber(0...n) in items (1st page = 0). The item page number property is
defined in variable cc_page_number. The highest page number sets the
count of pages inside container to required value. Thats compellingly!

To show a page, we can use setCurrentPage(0...n ) and paintCurPage() or use directly paintPage(0...n).
Note: global paint() will show the current page. Default page is 0 (as first).
Use setCurrentPage(0...n) to change this before first call of paint().
Note: In CComponentsWindow class, these methods are applied to window body.

For examples, take a look into CTestMenu

src/gui/components/cc_frm_scrollbar.h

@@ -0,0 +1,82 @@
+/*
+	Based up Neutrino-GUI - Tuxbox-Project
+	Copyright (C) 2001 by Steffen Hehn 'McClean'
+
+	Scrollbar class based up CComponentsFrmChain.
+	Copyright (C) 2014 Thilo Graf 'dbt'
+
+	License: GPL
+
+	This program is free software; you can redistribute it and/or
+	modify it under the terms of the GNU General Public
+	License as published by the Free Software Foundation; either
+	version 2 of the License, or (at your option) any later version.
+
+	This program is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+	General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __CC_FORM_SCROLLBAR_H__
+#define __CC_FORM_SCROLLBAR_H__
+
+#include "cc_frm_chain.h"
+#include "cc_item_picture.h"
+
+class CComponentsScrollBar : public CComponentsFrmChain
+{
+	private:
+		///scroll up navi icon object
+		CComponentsPicture *sb_up_obj;
+		///scroll down navi icon object
+		CComponentsPicture *sb_down_obj;
+		///container object for segments
+		CComponentsFrmChain *sb_segments_obj;
+
+		///names of navi icons
+		std::string sb_up_icon, sb_down_icon;
+
+		///count of segments
+		int sb_segments_count;
+
+		///mark id
+		int sb_mark_id;
+
+		///init top icon
+		void initTopNaviIcon();
+		///init bottom icon
+		void initBottomNaviIcon();
+
+		///init segements
+		void initSegments();
+		
+		///init all items
+		void initCCItems();
+
+		void initVarSbForm(	const int& count);
+
+	public:
+		CComponentsScrollBar(	const int &x_pos, const int &y_pos, const int &w = 15, const int &h = 40,
+					const int& count = 1,
+					CComponentsForm *parent = NULL,
+					bool has_shadow = CC_SHADOW_OFF,
+					fb_pixel_t color_frame = COL_MENUCONTENT_PLUS_3,
+					fb_pixel_t color_body = COL_MENUCONTENT_PLUS_0, fb_pixel_t color_shadow = COL_MENUCONTENTDARK_PLUS_0);
+// 		~CComponentsScrollBar(); //inherited from CComponentsForm
+
+		///set marked segment, 1st = 0, 2nd = 1 ...
+		void setMarkID(const int& mark_id){sb_mark_id = mark_id; initSegments();};
+		///get current assigned marked id
+		int getMarkID(){return sb_mark_id;};
+
+		///Sets count of scrollbar segments and is similar e.g. page count. Each segment is assigned to an id.  Starting with id 0...n see also setMarkID(), getMarkID().
+		void setSegmentCount(const int& segment_count, const int& mark_id = 0);
+		///Get count of current scrollbar segments
+		int getSegmentCount(){return sb_segments_count;}
+};
+
+#endif