Tree View - ItemGotSelectionAccept Event
Fired when an item in the list is about to become selected
Member of Tree View (PRIM_TRVW)
Parameters
Name | Type | Data Type | Description |
|---|---|---|---|
Accept | *Both | Boolean | Set to false to prevent the event from proceeding |
Reason | *Input | Enumeration | Action that triggered the event |
Details
The ItemGotSelectionAccept event is triggered immediately before the ItemGotSelection event.
It is not a replacement for the ItemGotSelection event, instead providing an opportunity for selection processing to be interrupted.
Set the Accept parameter to False to prevent selection changing.
Example
In this example, selection can be changed if the check box is checked.
Function Options(*DIRECT)
Begin_Com Role(*EXTENDS #PRIM_FORM) Height(469) Left(332) Top(244) Width(686) Clientwidth(670) Clientheight(430)
Define_Com Class(#PRIM_LTVW) Name(#ListView) Columnbuttonheight(19) Componentversion(2) Displayposition(1) Fullrowselect(True) Keyboardpositioning(SortColumn) Left(8) Parent(#COM_OWNER) Showsortarrow(True) Tabposition(1) Top(8) Height(377) Width(657)
Define_Com Class(#PRIM_LVCL) Name(#LVCL1) Displayposition(1) Parent(#ListView) Source(#EMPNO) Width(33)
Define_Com Class(#PRIM_LVCL) Name(#LVCL2) Displayposition(2) Parent(#ListView) Source(#SURNAME) Width(36)
Define_Com Class(#PRIM_LVCL) Name(#LVCL3) Displayposition(3) Parent(#ListView) Source(#GIVENAME) Width(25)
Define_Com Class(#PRIM_CKBX) Name(#AllowSelectionChange) Caption('Allow Selection Change?') Displayposition(2) Left(8) Marginleft(2) Parent(#COM_OWNER) Tabposition(2) Top(391) Width(161) Buttonstate(Checked)
Evtroutine Handling(#Com_owner.CreateInstance)
Select Fields(#ListView) From_File(pslmst)
Add_Entry To_List(#ListView)
Endselect
Endroutine
Evtroutine Handling(#ListView.ItemGotSelectionAccept #ListView.ItemLostSelectionAccept) Accept(#Accept)
#Accept := (#AllowSelectionChange.buttonState = Checked)
Endroutine
Evtroutine Handling(#ListView.ItemGotSelection)
#Com_owner.Caption += (#Empno + " ")
Endroutine
End_Com