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<b>class c4_Sequence</b>
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A sequence is an abstract base class for views on ranges of records.<br><br>
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<font face=Helvetica size=-1><b>Public members</b></font>
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<b>c4_Sequence</b> ();
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Abstract constructor</font>
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virtual int
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<b>Compare</b> (int, <A HREF="c4_Cursor.html" >c4_Cursor</A>) <i>const</i>;
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Compare the specified row with another one</font>
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void
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<b>SetAt</b> (int, <A HREF="c4_Cursor.html" >c4_Cursor</A>);
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Replace the contents of a specified row</font>
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virtual int
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<b>RemapIndex</b> (int, const <A HREF="c4_Sequence.html" >c4_Sequence</A>*) <i>const</i>;
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Remap the index to an underlying view</font>
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const char*
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<b>Describe</b> ();
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Return a descriptions of the current data structure</font>
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void
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<b>IncRef</b> ();
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Increment the reference count of this sequence</font>
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void
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<b>DecRef</b> ();
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Decrement the reference count, delete objects when last</font>
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int
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<b>NumRefs</b> () <i>const</i>;
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Return the current number of references to this sequence</font>
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virtual int
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<b>Size</b> () <i>const</i>;
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Return the current number of rows</font>
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void
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<b>Resize</b> (int, int =-1);
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Change number of rows, either by inserting or removing them</font>
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virtual void
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<b>InsertAt</b> (int, <A HREF="c4_Cursor.html" >c4_Cursor</A>, int =1);
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Insert one or more rows into this sequence</font>
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virtual void
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<b>RemoveAt</b> (int, int =1);
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Remove one or more rows from this sequence</font>
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virtual void
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<b>Move</b> (int, int);
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Move a row to another position</font>
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int
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<b>NthPropId</b> (int) <i>const</i>;
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Return the id of the N-th property</font>
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int
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<b>PropIndex</b> (int);
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Find the index of a property by its id</font>
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int
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<b>PropIndex</b> (const <A HREF="c4_Property.html" >c4_Property</A>&);
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Find the index of a property, or create a new entry</font>
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virtual int
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<b>NumHandlers</b> () <i>const</i>;
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Return the number of data handlers in this sequence</font>
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virtual c4_Handler&
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<b>NthHandler</b> (int) <i>const</i>;
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Return a reference to the N-th handler in this sequence</font>
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virtual const <A HREF="c4_Sequence.html" >c4_Sequence</A>*
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<b>HandlerContext</b> (int) <i>const</i>;
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Return the context of the N-th handler in this sequence</font>
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virtual int
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<b>AddHandler</b> (c4_Handler*);
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Add the specified data handler to this sequence</font>
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virtual c4_Handler*
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<b>CreateHandler</b> (const <A HREF="c4_Property.html" >c4_Property</A>&);
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Create a handler of the appropriate type</font>
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virtual int
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<b>ItemSize</b> (int index_, int propId_);
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Return width of specified data item</font>
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virtual bool
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<b>Get</b> (int, int, <A HREF="c4_Bytes.html" >c4_Bytes</A>&);
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Retrieve one data item from this sequence</font>
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virtual void
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<b>Set</b> (int, const <A HREF="c4_Property.html" >c4_Property</A>&, const <A HREF="c4_Bytes.html" >c4_Bytes</A>&);
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Store a data item into this sequence</font>
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void
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<b>Attach</b> (<A HREF="c4_Sequence.html" >c4_Sequence</A>* child_);
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Register a sequence to receive change notifications</font>
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void
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<b>Detach</b> (<A HREF="c4_Sequence.html" >c4_Sequence</A>* child_);
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Unregister a sequence which received change notifications</font>
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c4_Dependencies*
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<b>GetDependencies</b> () <i>const</i>;
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Return a pointer to the dependencies, or null</font>
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virtual c4_Notifier*
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<b>PreChange</b> (c4_Notifier& nf_);
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Called just before a change is made to the sequence</font>
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virtual void
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<b>PostChange</b> (c4_Notifier& nf_);
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Called after changes have been made to the sequence</font>
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const char*
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<b>UseTempBuffer</b> (const char*);
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virtual void
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<b>SetSize</b> (int size_);
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<A HREF="c4_Bytes.html" >c4_Bytes</A>&
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<b>Buffer</b> ();
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Gives access to a general purpose temporary buffer</font>
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<font face=Helvetica size=-1><b>Protected members</b></font>
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int
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<b>_propertyLimit</b>;
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short*
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<b>_propertyMap</b>;
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<A HREF="c4_Bytes.html" >c4_Bytes</A>*
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<b>_tempBuf</b>;
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virtual
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<b>~c4_Sequence</b> ();
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void
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<b>ClearCache</b> ();
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<font face=Helvetica size=-1><b>Header file</b></font>
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"mk4.h" -- Dec 9, 1999
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