cc_frm/cc_item_text: use mutexes in some members

Watched some problems with thredead parts in some window objects (e.g. messageboxes, clock ...) thx satbaby for some hints and testings Origin commit data ------------------ Branch: ni/coolstream Commit: 85956b90f7 Author: Thilo Graf <dbt@novatux.de> Date: 2019-10-27 (Sun, 27 Oct 2019) ------------------ This commit was generated by Migit
2025-09-12 07:53:37 +02:00 · 2019-10-27 22:56:50 +01:00
parent f8407de0a2
commit d0fe91e775
6 changed files with 294 additions and 219 deletions
--- a/src/gui/components/cc_draw.cpp
+++ b/src/gui/components/cc_draw.cpp
@@ -454,7 +454,7 @@ bool CCDraw::CheckFbData(const cc_fbdata_t& fbdata, const char* func, const int&


 //screen area save
-fb_pixel_t* CCDraw::getScreen(int ax, int ay, int dx, int dy)
+fb_pixel_t* CCDraw::getScreen(int ax, int ay, int dx, int dy) const
 {
 	fb_pixel_t* pixbuf = NULL;

--- a/src/gui/components/cc_draw.h
+++ b/src/gui/components/cc_draw.h
@@ -42,7 +42,7 @@ class CCDraw : public COSDFader, public CComponentsSignals, public CCTypes
 {
 	protected:
 		///pixel buffer handling, returns pixel buffer depends of given parameters
-		fb_pixel_t* getScreen(int ax, int ay, int dx, int dy);
+		fb_pixel_t* getScreen(int ax, int ay, int dx, int dy) const;
 		///returns screen data as screen_data_t
 		cc_screen_data_t getScreenData(const int& ax, const int& ay, const int& dx, const int& dy);
 		cc_screen_data_t cc_scrdata;
@@ -219,11 +219,11 @@ class CCDraw : public COSDFader, public CComponentsSignals, public CCTypes
 		void set2ndColor(fb_pixel_t col_2nd){cc_body_gradient_2nd_col = col_2nd;}

 		///get frame color
-		fb_pixel_t getColorFrame(){return col_frame;}
+		fb_pixel_t getColorFrame() const {return col_frame;}
 		///get body color
-		fb_pixel_t getColorBody(){return col_body;}
+		fb_pixel_t getColorBody() const {return col_body;}
 		///get shadow color
-		fb_pixel_t getColorShadow(){return col_shadow;}
+		fb_pixel_t getColorShadow() const {return col_shadow;}

 		///set body color
 		void setColorBody(fb_pixel_t color){col_body = color;}
@@ -240,9 +240,9 @@ class CCDraw : public COSDFader, public CComponentsSignals, public CCTypes
 		///set corner radius and type
 		virtual void setCorner(const int& radius, const int& type = CORNER_ALL);
 		///get corner types
-		int getCornerType(){return corner_type;};
+		int getCornerType() const {return corner_type;};
 		///get corner radius
-		int getCornerRadius(){return corner_rad;};
+		int getCornerRadius() const {return corner_rad;};

 		///switch shadow on/off
 		void setShadowWidth(const int& shadow_width){if (shadow_w != shadow_width) shadow_w = shadow_width;}
@@ -303,7 +303,7 @@ class CCDraw : public COSDFader, public CComponentsSignals, public CCTypes
 							cc_body_gradient_saturation=s;
 							enableColBodyGradient(mode, sec_color, direction);}
 		///gets current color gradient mode
-		int getColBodyGradientMode(){return cc_body_gradient_enable;}
+		int getColBodyGradientMode() const {return cc_body_gradient_enable;}

 		///abstract: paint item, arg: do_save_bg see paintInit() above
 		virtual void paint(const bool &do_save_bg = CC_SAVE_SCREEN_YES) = 0;
--- a/src/gui/components/cc_frm.cpp
+++ b/src/gui/components/cc_frm.cpp
@@ -32,6 +32,7 @@
 #include <stdlib.h>
 #include <algorithm>
 #include <system/debug.h>
+#include <stdexcept>

 using namespace std;

@@ -185,11 +186,13 @@ void CComponentsForm::clear()
 	if (v_cc_items.empty())
 		return;

+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	for(size_t i=0; i<v_cc_items.size(); i++) {
-		if (v_cc_items[i]){
-			dprintf(DEBUG_DEBUG, "[CComponentsForm]\t[%s-%d] delete form cc-item %d of %d address = %p \033[33m\t type = [%d] [%s]\033[0m\n", __func__, __LINE__, (int)i+1, (int)v_cc_items.size(), v_cc_items[i], v_cc_items[i]->getItemType(), v_cc_items[i]->getItemName().c_str());
-			delete v_cc_items[i];
-			v_cc_items[i] = NULL;
+		if (v_cc_items.at(i)){
+			dprintf(DEBUG_DEBUG, "[CComponentsForm]\t[%s-%d] delete form cc-item %d of %d address = %p \033[33m\t type = [%d] [%s]\033[0m\n", __func__, __LINE__, (int)i+1, (int)v_cc_items.size(), v_cc_items.at(i), v_cc_items.at(i)->getItemType(), v_cc_items.at(i)->getItemName().c_str());
+			delete v_cc_items.at(i);
+			v_cc_items.at(i) = NULL;
 		}
 	}
 	v_cc_items.clear();
@@ -199,6 +202,7 @@ void CComponentsForm::clear()
 int CComponentsForm::addCCItem(CComponentsItem* cc_Item)
 {
 	if (cc_Item){
+		std::lock_guard<std::mutex> g(cc_frm_mutex);
 		dprintf(DEBUG_DEBUG, "[CComponentsForm]\t[%s-%d] try to add cc_Item \033[33m\t type = [%d] [%s]\033[0m to form [%s -> current index=%d] \n", __func__, __LINE__, cc_Item->getItemType(), cc_Item->getItemName().c_str(), getItemName().c_str(), cc_item_index);

 		cc_Item->setParent(this);
@@ -226,11 +230,11 @@ int CComponentsForm::addCCItem(const std::vector<CComponentsItem*> &cc_Items)
 	return size();
 }

-int CComponentsForm::getCCItemId(CComponentsItem* cc_Item)
+int CComponentsForm::getCCItemId(CComponentsItem* cc_Item) const
 {
 	if (cc_Item){
 		for (size_t i= 0; i< v_cc_items.size(); i++)
-			if (v_cc_items[i] == cc_Item)
+			if (v_cc_items.at(i) == cc_Item)
 				return i;
 	}
 	return -1;
@@ -246,7 +250,7 @@ int CComponentsForm::genIndex()
 	return ret;
 }

-CComponentsItem* CComponentsForm::getCCItem(const uint& cc_item_id)
+CComponentsItem* CComponentsForm::getCCItem(const uint& cc_item_id) const
 {
 	if (cc_item_id >= size()){
 		dprintf(DEBUG_NORMAL, "[CComponentsForm]   [%s - %d]  Error: inside container type = [%d] [%s] parameter cc_item_id = %u, out of range (size = %zx)...\n", __func__, __LINE__, cc_item_type.id, cc_item_type.name.c_str(), cc_item_id, size());
@@ -258,12 +262,12 @@ CComponentsItem* CComponentsForm::getCCItem(const uint& cc_item_id)
 	return NULL;
 }

-CComponentsItem* CComponentsForm::getPrevCCItem(CComponentsItem* current_cc_item)
+CComponentsItem* CComponentsForm::getPrevCCItem(CComponentsItem* current_cc_item) const
 {
 	return getCCItem(getCCItemId(current_cc_item) - 1);
 }

-CComponentsItem* CComponentsForm::getNextCCItem(CComponentsItem* current_cc_item)
+CComponentsItem* CComponentsForm::getNextCCItem(CComponentsItem* current_cc_item) const
 {
 	return getCCItem(getCCItemId(current_cc_item) + 1);
 }
@@ -271,6 +275,8 @@ CComponentsItem* CComponentsForm::getNextCCItem(CComponentsItem* current_cc_item
 void CComponentsForm::replaceCCItem(const uint& cc_item_id, CComponentsItem* new_cc_Item)
 {
 	if (!v_cc_items.empty()){
+		
+		std::lock_guard<std::mutex> g(cc_frm_mutex);
 		CComponentsItem* old_Item = v_cc_items.at(cc_item_id);
 		if (old_Item){
 			CComponentsForm * old_parent = old_Item->getParent();
@@ -302,6 +308,8 @@ void CComponentsForm::insertCCItem(const uint& cc_item_id, CComponentsItem* cc_I
 		addCCItem(cc_Item);
 		dprintf(DEBUG_NORMAL, "[CComponentsForm]  %s insert cc_Item not possible, v_cc_items is empty, cc_Item added\n", __func__);
 	}else{
+		
+		std::lock_guard<std::mutex> g(cc_frm_mutex);
 		v_cc_items.insert(v_cc_items.begin()+cc_item_id, cc_Item);
 		cc_Item->setParent(this);
 		//assign item index
@@ -313,6 +321,7 @@ void CComponentsForm::insertCCItem(const uint& cc_item_id, CComponentsItem* cc_I
 void CComponentsForm::removeCCItem(const uint& cc_item_id)
 {
 	if (!v_cc_items.empty()){
+		std::lock_guard<std::mutex> g(cc_frm_mutex);
 		if (v_cc_items.at(cc_item_id)) {
 			delete v_cc_items.at(cc_item_id);
 			v_cc_items.at(cc_item_id) = NULL;
@@ -343,9 +352,14 @@ void CComponentsForm::exchangeCCItem(CComponentsItem* item_a, CComponentsItem* i

 void CComponentsForm::paintForm(const bool &do_save_bg)
 {
+	std::mutex paint_mutex;
+	std::lock_guard<std::mutex> g(paint_mutex);
 	//paint body
-	if (!is_painted || force_paint_bg || shadow_force)
+	if (!is_painted || force_paint_bg || shadow_force){
+		if (is_painted)
+			clearScreenBuffer(); //ensure clean screen buffers to avoid possible crash if layers were already was painted and any screen was saved before
 		paintInit(do_save_bg);
+	}

 	//paint
 	paintCCItems();
@@ -362,9 +376,12 @@ void CComponentsForm::paint(const bool &do_save_bg)
 bool CComponentsForm::isPageChanged()
 {
 	for(size_t i=0; i<v_cc_items.size(); i++){
-		if (v_cc_items[i]->getPageNumber() != cur_page)
+		if (v_cc_items.at(i)) {
+			if (v_cc_items.at(i)->getPageNumber() != cur_page){
 				return true;
 			}
+		}
+	}
 	return false;
 }

@@ -376,8 +393,6 @@ void CComponentsForm::paintPage(const uint8_t& page_number, const bool &do_save_

 void CComponentsForm::paintCCItems()
 {
-	size_t items_count 	= v_cc_items.size();
-
 	//using of real x/y values to paint items if this text object is bound in a parent form
 	int this_x = x, auto_x = x, this_y = y, auto_y = y, this_w = 0;
 	int w_parent_frame = 0;
@@ -419,31 +434,32 @@ void CComponentsForm::paintCCItems()
 		this->killCCItems(col_body, true);
 	}

-	for(size_t i=0; i<items_count; i++){
-		//assign item object
-		CComponentsItem *cc_item = v_cc_items[i];
+	try{
+		for(size_t i=0; i<v_cc_items.size(); i++){
+			if (!v_cc_items.at(i))
+				continue;

-		dprintf(DEBUG_DEBUG, "[CComponentsForm] %s: page_count = %u, item_page = %u, cur_page = %u\n", __func__, getPageCount(), cc_item->getPageNumber(), this->cur_page);
+			dprintf(DEBUG_DEBUG, "[CComponentsForm] %s: page_count = %u, item_page = %u, cur_page = %u\n", __func__, getPageCount(), v_cc_items.at(i)->getPageNumber(), this->cur_page);

 			//get current position of item
-		int xpos = cc_item->getXPos();
-		int ypos = cc_item->getYPos();
+			int xpos = v_cc_items.at(i)->getXPos();
+			int ypos = v_cc_items.at(i)->getYPos();

 			//get current dimension of item
-		int w_item = cc_item->getWidth() - (xpos <= fr_thickness ? fr_thickness : 0);
-		int h_item = cc_item->getHeight() - (ypos <= fr_thickness ? fr_thickness : 0);
+			int w_item = v_cc_items.at(i)->getWidth() - (xpos <= fr_thickness ? fr_thickness : 0);
+			int h_item = v_cc_items.at(i)->getHeight() - (ypos <= fr_thickness ? fr_thickness : 0);
 			/* this happens for example with opkg manager's "package info" screen on a SD framebuffer (704x576)
 			 * later CC_CENTERED auto_y calculation is wrong then */
-		if (cc_item->getHeight() > height) {
-			cc_item->setHeight(height);
+			if (v_cc_items.at(i)->getHeight() > height) {
+				v_cc_items.at(i)->setHeight(height);
 				// TODO: the fr_thickness is probably wrong for ypos < 0 (CC_CENTERED / CC_APPEND)
-			h_item = cc_item->getHeight() - (ypos <= fr_thickness ? fr_thickness : 0);
+				h_item = v_cc_items.at(i)->getHeight() - (ypos <= fr_thickness ? fr_thickness : 0);
 			}

 			//check item for corrupt position, skip current item if found problems
 			if (ypos > height || xpos > this_w){
 				dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] \033[33m\t type = [%d] [%s]\033[0m WARNING: item position is out of form size:\ndefinied x=%d, defined this_w=%d \ndefinied y=%d, defined height=%d \n",
-				__func__, cc_item_index, cc_item->getIndex(), cc_item->getItemType(), cc_item->getItemName().c_str(), xpos, this_w, ypos, height);
+					__func__, cc_item_index, v_cc_items.at(i)->getIndex(), v_cc_items.at(i)->getItemType(), v_cc_items.at(i)->getItemName().c_str(), xpos, this_w, ypos, height);
 				if (this->cc_item_type.id != CC_ITEMTYPE_FRM_CHAIN)
 					continue;
 			}
@@ -455,17 +471,17 @@ void CComponentsForm::paintCCItems()
 			//append vertical
 			if (xpos == CC_APPEND){
 				auto_x += append_x_offset;
-			cc_item->setRealXPos(auto_x + xpos + w_parent_frame);
+				v_cc_items.at(i)->setRealXPos(auto_x + xpos + w_parent_frame);
 				auto_x += w_item;
 			}
 			//positionize vertical centered
 			else if (xpos == CC_CENTERED){
 				auto_x =  this_w/2 - w_item/2;
-			cc_item->setRealXPos(this_x + auto_x + w_parent_frame);
+				v_cc_items.at(i)->setRealXPos(this_x + auto_x + w_parent_frame);
 			}
 			else{
-			cc_item->setRealXPos(this_x + xpos + w_parent_frame);
-			auto_x = (cc_item->getRealXPos() + w_item);
+				v_cc_items.at(i)->setRealXPos(this_x + xpos + w_parent_frame);
+				auto_x = (v_cc_items.at(i)->getRealXPos() + w_item);
 			}

 			//move item y-position, if we have a frame on parent, TODO: other constellations not considered at the moment
@@ -476,89 +492,117 @@ void CComponentsForm::paintCCItems()
 			if (ypos == CC_APPEND){
 				auto_y += append_y_offset;
 				// FIXME: ypos is probably wrong here, because it is -1
-			cc_item->setRealYPos(auto_y + ypos + w_parent_frame);
+				v_cc_items.at(i)->setRealYPos(auto_y + ypos + w_parent_frame);
 				auto_y += h_item;
 			}
 			//positionize hor centered
 			else if (ypos == CC_CENTERED){
 				auto_y =  height/2 - h_item/2;
-			cc_item->setRealYPos(this_y + auto_y + w_parent_frame);
+				v_cc_items.at(i)->setRealYPos(this_y + auto_y + w_parent_frame);
 			}
 			else{
-			cc_item->setRealYPos(this_y + ypos + w_parent_frame);
-			auto_y = (cc_item->getRealYPos() + h_item);
+				v_cc_items.at(i)->setRealYPos(this_y + ypos + w_parent_frame);
+				auto_y = (v_cc_items.at(i)->getRealYPos() + h_item);
 			}

 			//reduce corner radius, if we have a frame around parent item, ensure matching corners inside of embedded item, this avoids ugly unpainted spaces between frame and item border
 			//TODO: other constellations not considered at the moment
 			if (w_parent_frame)
-			cc_item->setCorner(max(0, cc_item->getCornerRadius()- w_parent_frame), cc_item->getCornerType());
+				v_cc_items.at(i)->setCorner(max(0, v_cc_items.at(i)->getCornerRadius()- w_parent_frame), v_cc_items.at(i)->getCornerType());

 			//These steps check whether the element can be painted into the container.
 			//Is it too wide or too high, it will be shortened and displayed in the log.
 			//This should be avoid!
 			//checkwidth and adapt if required
 			int right_frm = (cc_parent ? cc_xr : x) + this_w/* - 2*fr_thickness*/;
-		int right_item = cc_item->getRealXPos() + w_item;
-		int w_diff = right_item - right_frm;
+			int right_item = v_cc_items.at(i)->getRealXPos() + w_item;
+			int w_diff = max(0, right_item - right_frm);
 			int new_w =  w_item - w_diff;
 			//avoid of width error due to odd values (1 line only)
 			right_item -= (new_w%2);
 			w_item -= (new_w%2);
 			if (right_item > right_frm){
 				dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] \033[33m\t type = [%d] [%s]\033[0m this_w is too large, definied width=%d, possible width=%d \n",
-				__func__, cc_item_index, cc_item->getIndex(), cc_item->getItemType(), cc_item->getItemName().c_str(), w_item, new_w);
-			cc_item->setWidth(new_w);
+					__func__, cc_item_index, v_cc_items.at(i)->getIndex(), v_cc_items.at(i)->getItemType(), v_cc_items.at(i)->getItemName().c_str(), w_item, new_w);
+				v_cc_items.at(i)->setWidth(new_w);
 			}

 			//check height and adapt if required
 			int bottom_frm = (cc_parent ? cc_yr : y) + height/* - 2*fr_thickness*/;
-		int bottom_item = cc_item->getRealYPos() + h_item;
-		int h_diff = bottom_item - bottom_frm;
+			int bottom_item = v_cc_items.at(i)->getRealYPos() + h_item;
+			int h_diff = max(0, bottom_item - bottom_frm);
 			int new_h = h_item - h_diff;
 			//avoid of height error due to odd values (1 line only)
 			bottom_item -= (new_h%2);
 			h_item -= (new_h%2);
 			if (bottom_item > bottom_frm){
 				dprintf(DEBUG_INFO, "[CComponentsForm] %s: [form: %d] [item-index %d] \033[33m\t type = [%d] [%s]\033[0m height is too large, definied height=%d, possible height=%d \n",
-			       __func__, cc_item_index, cc_item->getIndex(), cc_item->getItemType(), cc_item->getItemName().c_str(), h_item, new_h);
-			cc_item->setHeight(new_h);
+					__func__, cc_item_index, v_cc_items.at(i)->getIndex(), v_cc_items.at(i)->getItemType(), v_cc_items.at(i)->getItemName().c_str(), h_item, new_h);
+				v_cc_items.at(i)->setHeight(new_h);
 			}

 			//get current visibility mode from item, me must hold it and restore after paint
-		bool item_visible = cc_item->paintAllowed();
+			const bool item_visible = v_cc_items.at(i)->paintAllowed();
 			//set visibility mode
-		if (!this->cc_allow_paint)
-			cc_item->allowPaint(false);
+			if (!cc_allow_paint)
+				v_cc_items.at(i)->allowPaint(false);

 			//restore background
-		if (v_cc_items[i]->isPainted())
-			v_cc_items[i]->hide();
+			if (v_cc_items.at(i)->isPainted())
+				v_cc_items.at(i)->hide();

 			//finally paint current item, but only required contents of page
-		if (cc_item->getPageNumber() == cur_page)
-			cc_item->paint(cc_item->SaveBg());
+			if (v_cc_items.at(i)->getPageNumber() == cur_page)
+				v_cc_items.at(i)->paint(v_cc_items.at(i)->SaveBg());

 			//restore defined old visibility mode of item after paint
-		cc_item->allowPaint(item_visible);
+			if (v_cc_items.at(i))
+				v_cc_items.at(i)->allowPaint(item_visible);
+		}
+	}
+	catch (const out_of_range& err0)
+	{
+		dprintf(DEBUG_NORMAL, "\033[31m[CComponentsForm]\[%s - %d], Error in item %s: Out of Range error: %s\033[0m\n", __func__, __LINE__, getItemName().c_str(), err0.what());
+		return;
+	}
+	catch (const std::runtime_error& err1)
+	{
+		dprintf(DEBUG_NORMAL, "\033[31m[CComponentsForm]\[%s - %d], runtime error in item %s: %s\033[0m\n", __func__, __LINE__, getItemName().c_str(), err1.what());
+		return;
+	}
+	catch (...)
+	{
+		dprintf(DEBUG_NORMAL, "\033[31m[CComponentsForm]\[%s - %d], unknown error in item %s: FIXME!\033[0m\n", __func__, __LINE__, getItemName().c_str());
+		return;
 	}
 }

 //erase or paint over rendered objects
 void CComponentsForm::killCCItems(const fb_pixel_t& bg_color, bool ignore_parent)
 {
-	for(size_t i=0; i<v_cc_items.size(); i++)
-		v_cc_items[i]->kill(bg_color, ignore_parent);
+	
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+	for(size_t i=0; i<v_cc_items.size(); i++){
+		if (v_cc_items.at(i))
+			v_cc_items.at(i)->kill(bg_color, ignore_parent);
+	}
 }

 void CComponentsForm::hideCCItems()
 {
-	for(size_t i=0; i<v_cc_items.size(); i++)
-		v_cc_items[i]->hide();
+	
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+	for(size_t i=0; i<v_cc_items.size(); i++){
+		if (v_cc_items.at(i))
+			v_cc_items.at(i)->hide();
+	}
 }

 void CComponentsForm::setPageCount(const uint8_t& pageCount)
 {
+	
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	uint8_t new_val = pageCount;
 	if (new_val <  page_count)
 		dprintf(DEBUG_NORMAL, "[CComponentsForm] %s:  current count (= %u) of pages higher than page_count (= %u) will be set, smaller value is ignored!\n", __func__, page_count, new_val) ;
@@ -569,9 +613,11 @@ uint8_t CComponentsForm::getPageCount()
 {
 	uint8_t num = 0;
 	for(size_t i=0; i<v_cc_items.size(); i++){
-		uint8_t item_num = v_cc_items[i]->getPageNumber();
+		if (v_cc_items.at(i)){
+			uint8_t item_num = v_cc_items.at(i)->getPageNumber();
 			num = max(item_num, num);
 		}
+	}

 	//convert type, possible -Wconversion warnings!
 	page_count = static_cast<uint8_t>(num+1);
@@ -582,6 +628,8 @@ uint8_t CComponentsForm::getPageCount()

 void CComponentsForm::setSelectedItem(int item_id, const fb_pixel_t& sel_frame_col, const fb_pixel_t& frame_col, const fb_pixel_t& sel_body_col, const fb_pixel_t& body_col, const int& frame_w, const int& sel_frame_w)
 {
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	size_t count = v_cc_items.size();
 	int id = item_id;

@@ -603,8 +651,10 @@ void CComponentsForm::setSelectedItem(int item_id, const fb_pixel_t& sel_frame_c
 			id = 0;
 	}

-	for (size_t i= 0; i< count; i++)
-		v_cc_items[i]->setSelected(i == (size_t)id, sel_frame_col, frame_col, sel_body_col, body_col, frame_w, sel_frame_w);
+	for (size_t i= 0; i< count; i++){
+		if (v_cc_items.at(i))
+			v_cc_items.at(i)->setSelected(i == (size_t)id, sel_frame_col, frame_col, sel_body_col, body_col, frame_w, sel_frame_w);
+	}

 	OnSelect();
 }
@@ -619,7 +669,7 @@ void CComponentsForm::setSelectedItem(CComponentsItem* cc_item, const fb_pixel_t
 	setSelectedItem(id, sel_frame_col, frame_col, sel_body_col, body_col, frame_w, sel_frame_w);
 }

-int CComponentsForm::getSelectedItem()
+int CComponentsForm::getSelectedItem() const
 {
 	for (size_t i= 0; i< size(); i++)
 		if (getCCItem(i)->isSelected())
@@ -627,7 +677,7 @@ int CComponentsForm::getSelectedItem()
 	return -1;
 }

-CComponentsItem* CComponentsForm::getSelectedItemObject()
+CComponentsItem* CComponentsForm::getSelectedItemObject() const
 {
 	int sel = getSelectedItem();
 	CComponentsItem* ret = NULL;
@@ -665,20 +715,27 @@ void CComponentsForm::ScrollPage(int direction, bool do_paint)

 bool CComponentsForm::clearSavedScreen()
 {
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
+	bool ret = false;
 	if (CCDraw::clearSavedScreen()){
 		for(size_t i=0; i<v_cc_items.size(); i++)
-			v_cc_items[i]->clearSavedScreen();
-		return true;
+			if (v_cc_items.at(i))
+				v_cc_items.at(i)->clearSavedScreen();
+		ret = true;
 	}

-	return false;
+	return ret;
 }

 bool CComponentsForm::clearPaintCache()
 {
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	if (CCDraw::clearPaintCache()){
 		for(size_t i=0; i<v_cc_items.size(); i++)
-			v_cc_items[i]->clearPaintCache();
+			if (v_cc_items.at(i))
+				v_cc_items.at(i)->clearPaintCache();
 		return true;
 	}

@@ -688,9 +745,12 @@ bool CComponentsForm::clearPaintCache()
 //clean old gradient buffer
 bool CComponentsForm::clearFbGradientData()
 {
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	if (CCDraw::clearFbGradientData()){
 		for(size_t i=0; i<v_cc_items.size(); i++)
-			v_cc_items[i]->clearFbGradientData();
+			if (v_cc_items.at(i))
+				v_cc_items.at(i)->clearFbGradientData();
 		return true;
 	}

@@ -699,28 +759,33 @@ bool CComponentsForm::clearFbGradientData()

 bool CComponentsForm::enableColBodyGradient(const int& enable_mode, const fb_pixel_t& sec_color, const int& direction)
 {
+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	if (CCDraw::enableColBodyGradient(enable_mode, sec_color, direction)){
 		for (size_t i= 0; i< v_cc_items.size(); i++)
-			v_cc_items[i]->clearScreenBuffer();
+			if (v_cc_items.at(i))
+				v_cc_items.at(i)->clearScreenBuffer();
 		return true;
 	}
 	return false;
 }

-int CComponentsForm::getUsedDY()
+int CComponentsForm::getUsedDY() const
 {
 	int y_res = 0;
 	for (size_t i= 0; i< v_cc_items.size(); i++)
-		y_res  = max(v_cc_items[i]->getYPos() + v_cc_items[i]->getHeight(), y_res);
+		if (v_cc_items.at(i))
+			y_res  = max(v_cc_items.at(i)->getYPos() + v_cc_items.at(i)->getHeight(), y_res);

 	return y_res;
 }

-int CComponentsForm::getUsedDX()
+int CComponentsForm::getUsedDX() const
 {
 	int x_res = 0;
 	for (size_t i= 0; i< v_cc_items.size(); i++)
-		x_res  = max(v_cc_items[i]->getXPos() + v_cc_items[i]->getWidth(), x_res);
+		if (v_cc_items.at(i))
+			x_res  = max(v_cc_items.at(i)->getXPos() + v_cc_items.at(i)->getWidth(), x_res);

 	return x_res;
 }
--- a/src/gui/components/cc_frm.h
+++ b/src/gui/components/cc_frm.h
@@ -29,7 +29,7 @@
 #include "config.h"
 #include "cc_base.h"
 #include "cc_item.h"
-
+#include <mutex>
 #define DEFAULT_SEL_FRAME_WIDTH 1

 class CComponentsForm : public CComponentsItem
@@ -42,6 +42,7 @@ class CComponentsForm : public CComponentsItem

 		///scrollbar object
 		CComponentsScrollBar *sb;
+		std::mutex cc_frm_mutex;

 		int append_x_offset;
 		int append_y_offset;
@@ -115,7 +116,7 @@ class CComponentsForm : public CComponentsItem
 		* @return
 		*	int, in case of not found item returns -1
 		*/
-		int getCCItemId(CComponentsItem* cc_Item);
+		int getCCItemId(CComponentsItem* cc_Item) const;

 		/**Function to get current item from item collection.
 		* @param[in]  cc_item_id
@@ -123,7 +124,7 @@ class CComponentsForm : public CComponentsItem
 		* @return
 		*	CComponentsItem*, in case of not found item returns NULL
 		*/
-		CComponentsItem* getCCItem(const uint& cc_item_id);
+		CComponentsItem* getCCItem(const uint& cc_item_id) const;

 		/**Function to get previous item from item collection.
 		* @param[in]  current_cc_item
@@ -131,7 +132,7 @@ class CComponentsForm : public CComponentsItem
 		* @return
 		*	CComponentsItem*, in case of not found item returns NULL
 		*/
-		CComponentsItem* getPrevCCItem(CComponentsItem* current_cc_item);
+		CComponentsItem* getPrevCCItem(CComponentsItem* current_cc_item) const;

 		/**Function to get next item from item collection.
 		* @param[in]  current_cc_item
@@ -139,20 +140,20 @@ class CComponentsForm : public CComponentsItem
 		* @return
 		*	CComponentsItem*, in case of not found item returns NULL
 		*/
-		CComponentsItem* getNextCCItem(CComponentsItem* current_cc_item);
+		CComponentsItem* getNextCCItem(CComponentsItem* current_cc_item) const;

 		void paintCCItems();

 		///clean up and deallocate existant items from v_cc_items at once
 		void clear();
 		///return true, if no items available
-		bool empty(){return v_cc_items.empty();};
+		bool empty() const {return v_cc_items.empty();}
 		///return size (count) of available items
-		size_t size(){return v_cc_items.size();};
+		size_t size() const {return v_cc_items.size();}
 		///return reference to first item
-		CComponentsItem* front(){return v_cc_items.front();};
+		CComponentsItem* front() const {return v_cc_items.front();}
 		///return reference to last item
-		CComponentsItem* back(){return v_cc_items.back();};
+		CComponentsItem* back() const {return v_cc_items.back();}

 		///sets alignment offset between items
 		void setAppendOffset(const int &x_offset, const int& y_offset){append_x_offset = x_offset; append_y_offset = y_offset;};
@@ -168,7 +169,7 @@ class CComponentsForm : public CComponentsItem
 		///sets current page
 		void setCurrentPage(const uint8_t& current_page){cur_page = current_page;};
 		///get current page
-		uint8_t getCurrentPage(){return cur_page;};
+		uint8_t getCurrentPage() const {return cur_page;}
 		///paint defined page number 0...n
 		void paintPage(const uint8_t& page_number, const bool &do_save_bg = CC_SAVE_SCREEN_NO);
 		///enum page scroll modes
@@ -184,34 +185,34 @@ class CComponentsForm : public CComponentsItem
 		///set width of scrollbar
 		void setScrollBarWidth(const int& scrollbar_width){w_sb = scrollbar_width;};
 		///returns id of selected item, return value as int, returns -1: if is nothing selected
-		int getSelectedItem();
+		int getSelectedItem() const;

 		/**Function to get consumed  space of items inside form in y direction.
 		* @return
 		*	int, used lines
 		*/
-		int getUsedDY();
+		int getUsedDY() const;

 		/**Function to get consumed  space of items inside form in x direction.
 		* @return
 		*	int, used lines
 		*/
-		int getUsedDX();
+		int getUsedDX() const;

 		/**Function to get free usable space of items inside form in y direction.
 		* @return
 		*	int, free lines
 		*/
-		int getFreeDY(){return height - getUsedDY();}
+		int getFreeDY() const {return height - getUsedDY();}

 		/**Function to get free usable space of items inside form in x direction.
 		* @return
 		*	int, free lines
 		*/
-		int getFreeDX(){return width - getUsedDX();}
+		int getFreeDX() const {return width - getUsedDX();}

 		///returns pointer to selected item, return value as CComponentsItem*, returns NULL: if is nothing selected
-		CComponentsItem* getSelectedItemObject();
+		CComponentsItem* getSelectedItemObject() const;
 		///select a definied item, parameter1 as size_t
 		void setSelectedItem(	int item_id,
 						const fb_pixel_t& sel_frame_col = COL_MENUCONTENTSELECTED_PLUS_0,
--- a/src/gui/components/cc_frm_signalbars.cpp
+++ b/src/gui/components/cc_frm_signalbars.cpp
@@ -345,6 +345,8 @@ void CSignalBox::paintScale()
 {
 	initSignalItems();

+	std::lock_guard<std::mutex> g(cc_frm_mutex);
+
 	//repaint items
 	sbar->Refresh();
 	sbar->paint/*Scale*/(false);
--- a/src/gui/components/cc_item_text.cpp
+++ b/src/gui/components/cc_item_text.cpp
@@ -36,6 +36,7 @@
 #include <fstream>
 #include <errno.h>
 #include <system/debug.h>
+#include <mutex>

 using namespace std;

@@ -156,26 +157,28 @@ void CComponentsText::initCCText()
 		ct_textbox = new CTextBox();

 	//set text properties
+	if (ct_textbox){
+		bool enable_bg_paint 	= !cc_txt_save_screen &&  ct_paint_textbg;
+		bool enable_save_screen =  cc_txt_save_screen && !ct_paint_textbg;
 		ct_textbox->setTextFont(ct_font);
 		ct_textbox->setTextMode(ct_text_mode);
 		ct_textbox->setTextColor(ct_col_text);
 		ct_textbox->enableUTF8(ct_utf8_encoded);
-
-	//set text box properties
 		ct_textbox->setWindowPos(&ct_box);
 		ct_textbox->setWindowMaxDimensions(ct_box.iWidth, ct_box.iHeight);
 		ct_textbox->setWindowMinDimensions(ct_box.iWidth, ct_box.iHeight);
 		ct_textbox->setTextBorderWidth(ct_text_Hborder, ct_text_Vborder);
-	bool enable_bg_paint = ct_paint_textbg && !cc_txt_save_screen;
 		ct_textbox->enableBackgroundPaint(enable_bg_paint);
 		ct_textbox->setBackGroundColor(col_body);
 		ct_textbox->setBackGroundRadius(0/*(corner_type ? corner_rad-fr_thickness : 0), corner_type*/);
-	bool enable_save_screen = cc_txt_save_screen && !ct_paint_textbg;
 		ct_textbox->enableSaveScreen(enable_save_screen);

+		//ensure clean font rendering on transparency background
+		ct_textbox->setTextRenderModeFullBG(!paint_bg);
+
 		//observe behavior of parent form if available
 		bool force_text_paint = ct_force_text_paint;
-#if 0 //FIXME.,
+#if 0 //FIXME
 		if (cc_parent){
 			//if any embedded text item was hided because of hided parent form,
 			//we must ensure repaint of text, otherwise text item is not visible
@@ -193,19 +196,20 @@ void CComponentsText::initCCText()
 			ct_old_text 	= ct_text;
 			ct_old_col_text = ct_col_text;
 		}
-
-	//ensure clean font rendering on transparency background
-	ct_textbox->setTextRenderModeFullBG(!paint_bg);
+	}

 // 	dprintf(DEBUG_NORMAL, "[CComponentsText]   [%s - %d] ct_text = %s, x = %d , x_old = %d , y = %d , y_old = %d , \nct_box.iWidth = %d , ct_box.iHeight = %d , width = %d , height = %d, corner_rad = %d\n", __func__, __LINE__, ct_text.c_str(), x, x_old, y, y_old, ct_box.iWidth, ct_box.iHeight, width, height, corner_rad);
 }

 void CComponentsText::clearCCText()
 {
-	if (ct_textbox)
+	std::mutex mutex;
+	std::lock_guard<std::mutex> g(mutex);
+	if (ct_textbox){
 		delete ct_textbox;
 		ct_textbox = NULL;
 	}
+}

 bool CComponentsText::setText(const std::string& stext, const int mode, Font* font_text, const fb_pixel_t& color_text, const int& style)
 {
@@ -293,7 +297,10 @@ void CComponentsText::paintText(const bool &do_save_bg)
 		paintInit(do_save_bg);

 	if (ct_text_sent && cc_allow_paint){
+
+		if (ct_textbox)
 			ct_textbox->paint();
+
 		is_painted = true;
 	}