$Revision$ $Date$ NSScroller Gui/NSScroller.h NSCoding scrollerWidth arrowsPosition checkSpaceForParts drawArrow: arrow highlight: flag drawKnob drawParts highlight: flag hitPart initWithFrame: frameRect knobProportion rectForPart: aPart setArrowsPosition: location setFloatValue: aFloat knobProportion: knobProp testPart: aPoint trackKnob: theEvent trackScrollButtons: theEvent usableParts