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この例には、部門、セクション、社員のツリー・ビューがあります。ドラッグ・アンド・ドロップにより社員をセクション間で移動できます。
社員をドラッグ・アンド・ドロップするツリーのソース
このソースをコピーしてフォームに貼り付け、コンパイルして実行してください。この例が動作するためには、DD_EMPPL Payloadのソースを再利用可能パーツとしてコンパイルしておく必要があります。
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FUNCTION options(*DIRECT)
BEGIN_
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COM role(*
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EXTENDS #PRIM_FORM)
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CAPTION('
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Move Employees')
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HEIGHT(359)
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LAYOUTMANAGER(#ATLM_1)
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LEFT(304)
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TOP(112)
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WIDTH(274)
DEFINE_
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COM class(#PRIM_ATLM)
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name(#ATLM_1)
DEFINE_
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COM class(#PRIM_TRVW)
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name(#TRVW_1)
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DISPLAYPOSITION(1)
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DRAGSTYLE(Automatic)
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HEIGHT(332)
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LEFT(0)
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PARENT(#COM_OWNER)
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TABPOSITION(1)
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TOP(0)
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WIDTH(266)
DEFINE_
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COM class(#PRIM_TVCL)
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name(#TVCL_1)
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DISPLAYPOSITION(1)
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KEYPOSITION(1)
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LEVEL(1)
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PARENT(#TRVW_1)
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SORTPOSITION(1)
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SOURCE(#DEPTMENT)
DEFINE_
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COM class(#PRIM_TVCL)
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name(#TVCL_2)
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DISPLAYPOSITION(1)
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KEYPOSITION(1)
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LEVEL(2)
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PARENT(#TRVW_1)
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SORTPOSITION(1)
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SOURCE(#SECTION)
DEFINE_
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COM class(#PRIM_TVCL)
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name(#TVCL_3)
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DISPLAYPOSITION(1)
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KEYPOSITION(1)
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LEVEL(3)
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PARENT(#TRVW_1)
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SORTPOSITION(1)
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SOURCE(#EMPNO)
DEFINE_
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COM class(#PRIM_ATLI)
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name(#ATLI_1)
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ATTACHMENT(Center)
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MANAGE(#TRVW_1)
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PARENT(#ATLM_1)
DEFINE_
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COM class(#PRIM_STBR)
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name(#STBR_1)
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DISPLAYPOSITION(2)
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HEIGHT(24)
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LEFT(0)
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MESSAGEPOSITION(1)
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PARENT(#COM_OWNER)
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TABPOSITION(2)
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TABSTOP(False)
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TOP(308)
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WIDTH(266)
DEFINE_COM class(#PRIM_ATLI) name(#ATLI_4) ATTACHMENT(Bottom) PARENT(#ATLM_1)
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* Employee Payload object
DEFINE_COM class(#dd_emppl) name(#PAYLOAD) reference(*dynamic)
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DEFINE field(#W_EMPNO)
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reffld(#EMPNO)
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DEFINE field(#W_DEPT)
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reffld(#DEPTMENT)
DEFINE field(#W_SECT) reffld(#SECTION)
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EVTROUTINE handling(#com_owner.CreateInstance)
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options(*
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NOCLEARERRORS *NOCLEARMESSAGES)
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* Tree view images
SET com(#tvcl_1)
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IMAGE(#vi_foldcl)
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IMAGEEXPANDED(#vi_foldop)
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SET com(#tvcl_2)
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IMAGE(#vi_sectcl)
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IMAGEEXPANDED(#vi_sectop)
SET com(#tvcl_3) IMAGE(#vi_employ)
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* Populate Tree
SELECT fields(#TRVW_1)
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from_file(DEPTAB)
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SELECT fields(#TRVW_1)
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from_file(SECTAB)
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with_key(#DEPTMENT)
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SELECT fields(#TRVW_1)
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from_file(PSLMST1)
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with_key(
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#DEPTMENT #SECTION)
ADD_
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ENTRY to_list(#TRVW_1)
ENDSELECT
ENDSELECT
ENDSELECT
ENDROUTINE
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* Start the drag operation.
* Only allow employees to be "dragged"
EVTROUTINE handling(#TRVW_1.StartDrag) options(*NOCLEARMESSAGES *NOCLEARERRORS) CONTINUE(#continue)
USE builtin(CLR_MESSAGES)
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* Create Payload Instance
SET_REF com(#payload) to(*create_as #dd_emppl)
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* Only allow employee to be dragged
IF cond('#Trvw_1.currentitem.level = 3')
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* Add item to the payload
INVOKE method(#Payload.Add_to_payload)
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EMPLOYEE_ID(#empno)
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EMPLOYEE_DEPARTMENT(#deptment)
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EMPLOYEE_SECTION(#section)
ELSE
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SET com(#continue)
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VALUE(false)
ENDIF
ENDROUTINE
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EVTROUTINE handling(#TRVW_1.DragOver)
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options(*
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NOCLEARERRORS *NOCLEARMESSAGES)
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ACCEPTDROP(#acceptdrop)
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SHOWDROPHILIGHT(#ShowHilight)
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* Show Item dragged over
SET com(#showhilight) VALUE(true)
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* If a department, employee cannot be dropped
IF_REF com(#trvw_1.currentitem) is_not(*null)
IF cond('(#trvw_1.currentitem.level *ne 1)')
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* Allow drop and set new cursor
SET com(#acceptdrop) VALUE(true)
ELSE
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* Disable drop
SET com(#acceptdrop) VALUE(False)
ENDIF
ENDIF
ENDROUTINE
EVTROUTINE handling(#TRVW_1.DragDrop) options(*NOCLEARERRORS *NOCLEARMESSAGES)
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* If the payload is not empty, get the payload item and add to the treeview in the new section
IF cond('#Payload.Payload_Items *ne *zero')
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* Return values in to working fields fields to compare with current item values
INVOKE method(#Payload.Get_Payload_Item) PAYLOAD_ITEM(1) EMPLOYEE_ID(#empno) EMPLOYEE_DEPARTMENT(#w_dept) EMPLOYEE_SECTION(#w_sect)
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* If the department and/or section have changed, do the drop
IF cond('(#deptment *ne #W_dept) or (#section *ne #w_sect)')
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* Department and section values of currentitem are used
ADD_ENTRY to_list(#TRVW_1)
MESSAGE msgtxt(' Drop Successful')
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* Expand Parent items of new drop point
* As drop can only happen on a section, department must be expanded
CHANGE field(#W_DEPT)
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to(#DEPTMENT)
CHANGE field(#W_SECT) to(#section)
SELECTLIST named(#TRVW_1)
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CONTINUE if('#w_
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dept *ne #deptment')
CONTINUE if('#w_sect *ne #section')
SET com(#trvw_1.currentitem) EXPANDED(true)
LEAVE
ENDSELECT
ENDIF
ENDIF
ENDROUTINE
EVTROUTINE handling(#TRVW_1.EndDrag) options(*NOCLEARERRORS *NOCLEARMESSAGES) DRAGRESULT(#DragResult)
IF cond('#Dragresult.value = Accepted')
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* If the department and/or section have changed delete the source employee
IF cond('(#deptment *ne #w_dept) or (#section *ne #w_sect)')
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* Get payload item details
INVOKE method(#Payload.Get_Payload_Item) PAYLOAD_ITEM(1) EMPLOYEE_ID(#w_empno) EMPLOYEE_DEPARTMENT(#w_dept) EMPLOYEE_SECTION(#w_sect)
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* Locate and Delete source employee
SELECTLIST named(#TRVW_1)
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CONTINUE if('#w_
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dept *ne #deptment')
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CONTINUE if('#w_
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sect *ne #section')
CONTINUE if('#w_empno *ne #empno')
DLT_ENTRY from_list(#TRVW_1)
LEAVE
ENDSELECT
ENDIF
ENDIF
ENDROUTINE
END_COM