BShapeIterator

Derived from: (none)
Declared in:  be/interface/Shape.h
Library: libbe.so
Allocation: Constructor only
Summary:  more...

Applications can create classes derived from BShapeIterator to iterate over the components of a BShape object. There are four virtual functions that the application must implement to process the four graphics commands described in the BShape documentation: MoveTo(), LineTo(), BezierTo(), and Close().

These functions can be implemented to do anything they like with the commands (rendering them to the screen comes to mind as one possibility).

Constructor and Destructor

BShapeIterator()

BShapeIterator()

Constructor.

~BShapeIterator()

virtual ~BShapeIterator()

Destructor.

Member Functions

Iterate()

status_t Iterate(BShape *shape)

Iterate() iterates over each command that comprises the shape, in order, calling the Iterate...() function that corresponds to each command.

RETURN CODES

• B_OK. No error.

• Other errors. None are defined at this time, but you should always check for errors returned by this function.

IterateBezierTo() , IterateClose() , IterateLineTo() , IterateMoveTo()

virtual status_t IterateBezierTo(int32 bezierCount, BPoint * bezierPoints) virtual status_t IterateClose(void) virtual status_t IterateLineTo(int32 lineCount, BPoint * linePoints) virtual status_t IterateMoveTo(BPoint * point)

These functions are called by Iterate() to process the shape commands. Your BShapeIterator-derived class must implement these four functions.