Class: Record_Buffer

**************************************************************************// // RECORD_BUFFER // // Every data_set will have a object based on this class. It will hold // the values for the fields, the entry_options and the messages IDs of the // iEntry, iExit and iValidate messages for each field. // It is assumed that an object of this class will always be used as a // child object of a Data_Set object. // // Currently the fieldtypes Overlap, Text and Binary are *not* supported. // // ITEM-PROPERTY ASSIGNED-FUNCTION // // Value The value of the field. Will be updated whenever the // value of a field changes due to data-entry or a found // record. // Data_File Contains the filenumber. Is the same for every item. // Data_Field Contains the fieldnumber for the item. Is equal to the // items' itemnumber. // Item_Options Used to store the standard item-options of a field. // Aux_Value Used to store the foreign-item-options of a field. // // **************************************************************************//

Class Hierarchy:

cm_ENTRYLIST

Record_Buffer

Class Definition

Functions and Procedures

Create_Items(Integer iFile)

************************************************************************// Create_Items. // This procedure will be called from the Data_Set when the Main_File is // being set. It will create an item for each field of the file in this // object. Fields of the types DF_OVERLAP, DF_TEXT and DF_BINARY are // currently not added. // ************************************************************************//

End_Construct_Object()

************************************************************************// End_Construct_Object. // Make sure this object cannot be activated implicitely or explicitely. // ************************************************************************//

OnNewCurrentRecord(RowId riOld RowId riNew)

************************************************************************// New_Current_Record. // This procedure will be called from the parent Data_Set whenever the // Data_Set changes its Current_Record property, or after a Save, Delete // or Clear operation. // We use this event to store the values of the fields in our local // record buffer. // ************************************************************************//

Set(Integer iState)

************************************************************************// Procedure Set Changed_State. // Make sure to set the Changed_State of the Data_Set to TRUE when a // field value changes and it's not during the Setting of the Defaults. // ************************************************************************//

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