WebCGMRect

["Bezaire, Benoit" <bbezaire@ptc.com>]

Here is the proposal for the WebCGMRect interface:

 

---

 

interface WebCGMRect {

    attribute float xll; // x coordinate of the lower left corner

    attribute float yll; // y coordinate of the lower left corner

    attribute float xur; // x coordinate of the upper right corner

    attribute float yur; // y coordinate of the upper right corner

 

    WebCGMRect union( in WebCGMRect r );

};

 

Methods

    union

                Computes the union of the current rectangle with the input rectangle r. Returns resulting new WebCGMRect

 

                Parameters

                        in WebCGMRect r. The rectangle used to calculate the union.

                Return value

                        WebCGMRect    The resulting rectangle.

                No Exceptions

 

 

 

Updated APIs...

 

WebCGMRect getObjectExtent()

Retrieves the bounding box rectangle of the Graphical Primitive elements within an APS. The bounding box calculation is based on the abstract locus of the primitives within the APS — it is not affected by CGM Primitive Attribute (such as line width) or Control elements, nor by APS Attributes or Style Properties (except geometric transform). The rectangle is defined by two diametrically opposite corner points expressed in NVDC after the application of the Current Transformation Matrix.

Parameters

No parameters.

Return value

WebCGMRect; the bounding rectangle of the APS, or null if the APS has no Graphical Primitive elements.

Exceptions

No exceptions.

 

Updated APIs...

 

setView

    Sets the view to the specified rectangle expressed in NVDC units.

WebCGMRect::union and WebCGMAppStructure::getObjectExtent can be used to set the view around more than one APS.

Parameters

viewRect of type WebCGMRect

The view rectangle in NVDC.

Return value

No return value.

Exceptions

No exceptions.

Questions:

- do we need other methods on the WebCGMRect interface? see for example: http://java.sun.com/j2se/1.4.2/docs/api/java/awt/Rectangle.html