* return the ptg components for a certain column within a ptgArea()
* @param rowNum
* @return all Ptg's within colNum
*/
public Ptg[] getRowComponents(int rowNum){
FastAddVector v = new FastAddVector();
Ptg[] allComponents = this.getComponents();
for(int i=0;i<allComponents.length;i++){
PtgRef p = (PtgRef)allComponents[i];
// TODO: check rc sanity here
int[] x = p.getRealIntLocation();
if(x[0] == rowNum)v.add(p);
}
PtgRef[] pref = new PtgRef[v.size()];
v.toArray(pref);
return pref;
}