Rectangle.containsPoint Method
        
 Check if a coordinate is contained by this rectangle.
 
         
        Parameters
        
            - coordinate
            
 
            - 
                
Type: dundas.controls.Coordinate
The coordinate to check. 
            - canvasScale
            
 
            - 
                
Type: Number - May be null
(Optional)The current scale of the canvas. If null assumed to be 1. 
        
        Return Value
        
Type: Boolean
        
True if contained.