Painting lines

[therealjag]

hey there i am trying to create links between nodes that i have made but theres 1 problem. everytime i paint a link the last link that i painted onto the qpainter goes away. how can i keep the links that have been painted before on the link? i store the node Id's in an array and their position with a struct. so i just get a user input as to where they want the link to be created. my code for the painting is shown below:

if( drawLine == 1)
    {	
	    painter.setPen(myTextColor());	 
	   painter.drawLine( list.position[n1]+offset, list.position[n2]+offset );
		painter.drawText(QRect(midpoint,textbox),0,tr("%1").arg(topology[n1][n2]));
 
    }

if( drawLine == 1)
    {	
	    painter.setPen(myTextColor());	 
	   painter.drawLine( list.position[n1]+offset, list.position[n2]+offset );
		painter.drawText(QRect(midpoint,textbox),0,tr("%1").arg(topology[n1][n2]));
	 
    }

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i also have a capacity number that i wish to appear between the links when they get painted.