Clipboard - manages a list of graphical component subjects
A Clipboard maintains a list of GraphicComp objects and provides operations for
manipulating the list. Catalog and Command classes use clipboards to store
graphical components they affect.
- Clipboard(GraphicComp* = nil)
- Construct a new clipboard object, optionally with a
GraphicComp that should appear initially on the list.
- virtual ~Clipboard()
- Delete the clipboard. Deleting the clipboard does
not delete the GraphicComp objects it contains.
- void Init(Selection*)
- void CopyInit(Selection*)
- Init initializes the clipboard with the subjects belonging
to the graphical views in the given selection object. CopyInit initializes
it with copies of the subjects.
- void Clear()
- Remove all GraphicComp objects from the clipboard. The
objects are not deleted.
- void DeleteComps()
- Delete each GraphicComp in the clipboard. This operation
does not delete the list itself; thus it will still be possible to
iterate through the list afterwards. DeleteComps is generally called just
before the clipboard is destroyed.
- void Append(GraphicComp*)
- void Prepend(GraphicComp*)
- void InsertAfter(Iterator, GraphicComp*)
- void InsertBefore(Iterator, GraphicComp*)
- void Remove(GraphicComp*)
- void Remove(Iterator&)
- Operations for adding and removing GraphicComp objects from
the clipboard. InsertAfter and InsertBefore take an iterator that
specifies the point before or after which the given GraphicComp should be
inserted. Remove(Iterator&) removes the GraphicComp to which the
iterator refers and increments the iterator to point to the following
- GraphicComp* GetComp(Iterator)
- void SetComp(GraphicComp*, Iterator&)
- GetComp effectively dereferences an iterator, returning the
GraphicComp to which it points. SetComp initializes an iterator to point
to the given GraphicComp object, assuming the object is in the
- void First(Iterator&)
- void Last(Iterator&)
- void Next(Iterator&)
- void Prev(Iterator&)
- boolean Done(Iterator&)
- Operations for iterating through the GraphicComps in the
clipboard. First and Last modify the iterator to point to the first and
last GraphicComp objects. Next and Prev make the iterator point to the
succeeding and preceding GraphicComp objects. Done returns whether the
iterator points to the sentinel object on the list, which marks the
beginning and the end of list.
- boolean IsEmpty()
- boolean Includes(GraphicComp*)
- Return whether or not the clipboard is empty or whether it
includes the given GraphicComp object.
- virtual Clipboard* Copy()
- virtual Clipboard* DeepCopy()
- Copy creates a new clipboard with a list of the same
GraphicComp objects as this. DeepCopy creates a new clipboard
containing copies of the objects in this.
- UList* Elem(Iterator)
- GraphicComp* Comp(UList*)
- The Clipboard class stores its GraphicComp objects in a
UList. These convenience functions convert an iterator into a UList
element and dereference a UList element to obtain a GraphicComp object,
Catalog(3U), Command(3U), GraphicComp(3U), Iterator(3U), Selection(3U),