VkCursorList(3x)VkCursorList(3x)NAMEVkCursorList - Support lists of cursors that can be used for animation
HEADER FILE
#include <Vk/VkCursorList.h>
PUBLIC PROTOCOL SUMMARY
Destructor
virtual void ~VkCursorList(void);
CLASS DESCRIPTION
This abstract base class manages a list of cursors and supports
functions for cycling through the list. It is used as the basis of
VkBusyCursor, which provides a sequence of animated busy cursors. To
add alternate busy cursors to a ViewKit application, one can
subclass VkCursorList, provide the desired sequence of Cursors, and
install the new class with the VkApp object.
PUBLIC METHOD DESCRIPTIONS
~VkCursorList()
virtual void ~VkCursorList(void);
Frees the storage associated with a VkCursorList object.
next()
Cursor next();
Returns the next Cursor in the sequence.
current()
Cursor current();
Returns the current cursor in the sequence.
reset()
void reset();
Resets a sequence of Cursors to the initial Cursor in the animation
sequence.
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VkCursorList(3x)VkCursorList(3x)DERIVING SUBCLASSES
To use the VkCursorList class, you must create a subclass. The
subclass must implement the createCursor() method, which is expected
to return a Cursor, given an index into a sequence.
PROTECTED METHOD DESCRIPTIONSVkCursorList()
VkCursorList(int numCursors);
Initializes a VkCursorList object. This constructor must be called
from a derived class constructor. The numCursors argument must
indicate the number of Cursors in the sequence of animated Cursors
this class will create.
createCursor()
virtual void createCursor(int index) = 0;
VkCursorList uses a lazy evaluation method for creating Cursors. No
Cursors are created initially. VkCursorList maintains a list of
cursors that is supplied to clients via calls to next() and
current(). When VkCursorList needs a Cursor that has not yet been
created, it calls createCursor() with an index that indicates the
needed Cursor. Subclasses are expected to implement this function
and be able to return the appropriate Cursor.
KNOWN DERIVED CLASSES
VkBusyCursor
SEE ALSO
ViewKit Programmer's Guide
The X Window System, DEC Press, Bob Sheifler and Jim Gettys
The X Window System Toolkit, DEC Press, Paul Asente and Ralph Swick
The OSF/Motif Programmers Reference, Prentice Hall, OSF
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