dlgEvent_record_BeforeConstruct

Function called by dialog code event before user searches at the record level.

Syntax

PUBLIC FUNCTION dlgEvent_record_BeforeConstruct( 
   dlg ui.DIALOG, 
   uiMode SMALLINT,
   dlgCtrlInstruction libdbappEvents.DlgCtrlInstruction_Type)
  RETURNS (libdbappEvents.DlgCtrlInstruction_Type)
The function parameters are:
  1. dlg. This is a ui.DIALOG object referencing the current dialog. The dialog can implement an INPUT, INPUT ARRAY, DISPLAY ARRAY, MENU, or CONSTRUCT. For more information, see The Dialog class in Genero Business Development Language User Guide.
  2. uiMode. This is an integer value defining the current mode or state in relation to user action in the dialog, form, or application. Modes are defined as constants in the libdbappFormUI file in the libdbapp library.
    Table 1. UI modes
    Description Applies to ... Constant Value
    Display DISPLAY ARRAY C_MODE_DISPLAY 1
    Modify INPUT \ INPUT ARRAY C_MODE_MODIFY 2
    Add INPUT \ INPUT ARRAY C_MODE_ADD 3
    Search CONSTRUCT C_MODE_SEARCH 4
    Empty MENU C_MODE_EMPTY 5
    Exit form The form C_MODE_EXIT_FORM 6
    Exit app The app C_MODE_EXIT_APP 7
    Undefined All (array, form, or app) C_MODE_UNDEFINED 0
  3. dlgCtrlInstruction is a libdbappEvents.DlgCtrlInstruction_Type defining the dialog control instruction. Instructions available in the function are shown in the table.
    Table 2. Dialog control instructions
    Description Constant Value
    Accept dialog ACCEPT_DIALOG 1
    Continue dialog CONTINUE_DIALOG 2
    Exit dialog EXIT_DIALOG 3

The function returns a dialog control instruction value defined by libdbappEvents.DlgCtrlInstruction_Type.

Usage

When you select the Before Construct property for the creation of the event, a function shell is created. Enter your code in the function.

This function is called at set up of the CONSTRUCT dialog instance before the program gives control to the user. Use this function to display, for example, messages to the user, initialize form fields with default search criteria values, and set up the CONSTRUCT dialog instance.

Example: Before Construct

This example uses the Before Construct code event in the Account form of the OfficeStore demo.

In this example the value for the "account.langpref" field is set. The value entered sets this as criteria for the search. The field's modification flag is set.

PUBLIC FUNCTION dlgEvent_recAccount_BeforeConstruct(dlg ui.DIALOG, uiMode SMALLINT,
      dlgCtrlInstruction libdbappEvents.DlgCtrlInstruction_Type)
    RETURNS (libdbappEvents.DlgCtrlInstruction_Type)

    CALL libdbappCore.log(C_LOG_INFO, "dlgEvent_recAccount_BeforeConstruct (Record scope) is raised")
    CALL dlg.setFieldValue("account.langpref","English")
    CALL dlg.setFieldTouched("account.langpref", TRUE)
    CALL libdbappCore.log(C_LOG_INFO, "dlgEvent_recAccount_BeforeConstruct (Record scope) is exited")

    RETURN dlgCtrlInstruction
END FUNCTION

For more information on the libdbappCore.log() function, go to DBAPPDEBUG and the debug level API.