ImageCoordinatesWindow

The ImageCoordinates-Window is a first attempt to modify parameters
graphically. There a some types of controls which can be dragged and 
modified using the mouse. All interesting values like image-coordinates
or the radius of a circle are indicated and could be copied to the 
options-window of the selected PlugIn.

Functions

Control-Type     type of control:
                   point : simple point, e.g. represting a upper-left edge
                           of a image to be composed
                   rect  : e.g. representing a crop-region
                   circle: e.g. representing the amount and the radius
                                of a Twirl-effect

Left,Top         coordinates of the point (in coordiantes of the unscaled image),
                 upper-left edge of the rectangle,
                 centre of the circle,
Right, Bottom    lower-right edge of the rectangle
Angle            angle of the current drawn radius of the circle
Radius           radius of the circle