try to remove some "flickering" by using setActive(false)/setActive() and adding

a glFlush...

src/dialogxml/dialogs/dialog.cpp

@@ -1026,7 +1026,7 @@ xBadVal::~xBadVal() throw(){
 bool cDialog::doAnimations = false;
 
 void cDialog::draw(){
-	win.setActive();
+	win.setActive(false);
 	tileImage(win,winRect,::bg[bg]);
 	if(doAnimations && animTimer.getElapsedTime().asMilliseconds() >= 500) {
 		cPict::advanceAnim();
@@ -1039,6 +1039,7 @@ void cDialog::draw(){
 		iter++;
 	}
 	
+	win.setActive();
 	win.display();
 }
 

src/dialogxml/widgets/button.cpp

@@ -51,7 +51,7 @@ bool cButton::isScrollable(){
 void cButton::draw(){
 	rectangle from_rect, to_rect;
 	
-	inWindow->setActive();
+	inWindow->setActive(false);
 	
 	if(visible){
 		TextStyle style;
@@ -86,6 +86,7 @@ void cButton::draw(){
 		// frame default button, to provide a visual cue that it's the default
 		if(key.spec && key.k == key_enter) drawFrame(2,frameStyle);
 	}
+	inWindow->setActive();
 }
 
 bool cButton::manageFormat(eFormat prop, bool set, boost::any* val) {

src/dialogxml/widgets/led.cpp

@@ -89,7 +89,7 @@ bool cLed::manageFormat(eFormat prop, bool set, boost::any* val) {
 void cLed::draw(){
 	rectangle from_rect, to_rect;
 	
-	inWindow->setActive();
+	inWindow->setActive(false);
 	
 	if(visible){
 		TextStyle style;
@@ -106,6 +106,8 @@ void cLed::draw(){
 		to_rect.left = frame.left + 18; // Possibly could be 20
 		win_draw_string(*inWindow,to_rect,lbl,wrapLabel ? eTextMode::WRAP : eTextMode::LEFT_TOP,style);
 	}
+
+	inWindow->setActive();
 }
 
 cControl::storage_t cLed::store() {