Module wdh - Low-Level-Editing of Widgets
The module wdh (widget handler) provides the standard functions for the low-level-editing of on widgets. You can call some of these functions directly as userexit. The following operations can be executed:
- execute a counting query based on the current widget data
- execute a data query based on the current widget data
- temporarily deleting records in the widget
- finally deleting all records in the trash-basket
- read selected widget elements
- read the significant fields of the widget
- read the join condition of the widget
All provided functions of the module wdh can be handled in an uncomplicated way. The checks required for securing the consistency of the data model of your application are integrated in the standard userexits. Errors at passing parameters are rejected by DataView with a corresponding error message
Important functions
- dal_wdh_ext_lis
- standard userexit for extending a list widget by the internal system fields of DataView
- dal_wdh_cnt_lis, dal_wdh_upd_lis, dal_wdh_upd_sng
- standard userexits for counting or queries in a widget based on the search terms entered in the field query buffers. You can differentiate between multi-fetch and single-fetch procedures
- dal_wdh_del_lis
- standard function for temporarily deleting records from a widget
- dal_wdh_get_sel, dal_wdh_ret_sig
- standard functions for reading selected records or the significant field entries in the widget.