• Creating Instances

• Getting the Ruler View

• Setting the Image

• Setting Movability

• Setting the Location

• Setting the Represented Object

• Drawing and Event Handling

• drawRect:

• image

• imageOrigin

• imageRectInRuler

• initWithRulerView:markerLocation:image:imageOrigin:

• isDragging

• isMovable

• isRemovable

• markerLocation

• representedObject

• ruler

• setImage:

• setImageOrigin:

• setMarkerLocation:

• setMovable:

• setRemovable:

• setRepresentedObject:

• thicknessRequiredInRuler

• trackMouse:adding: