CComponents/CComponentsItem: add advanced version of kill()

kill() allows now paint with defined colors over rendered objects
without restore of background. It's similar to paintBackgroundBoxRel()
known from CFrameBuffer, but with possiblity to define color,
default color is 0 like before (empty background).
Items with parent bindings use the background color of its parent
as default, but can also be ignored.

This function can be useful before repaint of items and/or,
if required, to have a clean background inside item containers.


Origin commit data
------------------
Branch: ni/coolstream
Commit: 6a2e701a7a
Author: Thilo Graf <dbt@novatux.de>
Date: 2014-05-05 (Mon, 05 May 2014)



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This commit was generated by Migit

src/gui/components/cc_base.cpp

@@ -227,11 +227,15 @@ inline void CComponents::hide()
 	is_painted = false;
 }
 
-//erase rendered objects
-void CComponents::kill()
+//erase or paint over rendered objects
+void CComponents::kill(const fb_pixel_t& bg_color)
 {
-	for(size_t i =0; i< v_fbdata.size() ;i++) 
+	for(size_t i =0; i< v_fbdata.size() ;i++){
+		if (bg_color)
+			frameBuffer->paintBoxRel(v_fbdata[i].x, v_fbdata[i].y, v_fbdata[i].dx, v_fbdata[i].dy, bg_color, v_fbdata[i].r, corner_type);
+		else
 			frameBuffer->paintBackgroundBoxRel(v_fbdata[i].x, v_fbdata[i].y, v_fbdata[i].dx, v_fbdata[i].dy);
+	}
 	clearFbData();
 	firstPaint = true;
 	is_painted = false;

src/gui/components/cc_base.h

@@ -201,8 +201,11 @@ class CComponents
 
 		///hide current screen and restore background
 		virtual void hide();
-		///erase current screen without restore of background, it's similar to paintBackgroundBoxRel() from CFrameBuffer
-		virtual void kill();
+
+		///erase or paint over rendered objects without restore of background, it's similar to paintBackgroundBoxRel() known
+		///from CFrameBuffer but with possiblity to define color, default color is 0 (empty background)
+		virtual void kill(const fb_pixel_t& bg_color = 0);
+
 		///returns paint mode, true=item was painted
 		virtual bool isPainted(){return is_painted;}
 		///allows paint of elementary item parts (shadow, frame and body), similar as background, set it usually to false, if item used in a form
@@ -262,6 +265,11 @@ class CComponentsItem : public CComponents
 		///hides item, arg: no_restore see hideCCItem() above
 		virtual void hide(bool no_restore = false);
 
+		///erase or paint over rendered objects without restore of background, it's similar to paintBackgroundBoxRel() known
+		///from CFrameBuffer but with possiblity to define color, default color is 0 (empty background)
+		///NOTE: Items with parent binding use the parent background color as default! Set parameter 'ignore_parent=true' to ignore parent background color!
+		virtual void kill(const fb_pixel_t& bg_color = 0, bool ignore_parent = false);
+
 		///get the current item type, see attribute cc_item_type above
 		virtual int getItemType();
 		///syncronizes item colors with current color settings if required, NOTE: overwrites internal values!

src/gui/components/cc_item.cpp

@@ -133,6 +133,22 @@ void CComponentsItem::hide(bool no_restore)
 	hideCCItem(no_restore);
 }
 
+//erase or paint over rendered objects
+void CComponentsItem::kill(const fb_pixel_t& bg_color, bool ignore_parent)
+{
+	if(bg_color || cc_parent == NULL){
+		CComponents::kill(bg_color);
+		return;
+	}
+
+	if (cc_parent){
+		if(bg_color || ignore_parent)
+			CComponents::kill(bg_color);
+		else
+			CComponents::kill(cc_parent->getColorBody());
+	}
+}
+
 //synchronize colors for forms
 //This is usefull if the system colors are changed during runtime
 //so you can ensure correct applied system colors in relevant objects with unchanged instances.