实现在virtualStringtree中编辑的标准步骤

1.设置TVirtualStringTree属性：

toFullRowSelect : false;

toMultiSelect:false;

toExtendedFocous:true;

toEditable:true;

editDelay:0 //如果不调用editnode，则不会CREATE EDITOR

2.实现virtualStringtree的ONClick事件：
功能：根据当前获取焦点的node，判断是否edit该node

TMMSLibraryForm版本：

procedure TMMSLibraryForm.DataTreeClick(Sender: TObject);
var
Column:TColumnIndex;
node:PVirtualNode;
begin
if DataTree.FocusedNode=nil then Exit;

node:=DataTree.FocusedNode;
Column:=DataTree.FocusedColumn;

if Column<>3 then
DataTree.EditNode(node,Column);

end;

TSPNumbersForm版本：

procedure TSPNumbersForm.VSTreeSPnumberClick(Sender: TObject);
var
Column:TColumnIndex;
node:PVirtualNode;
begin
if VSTreeSPnumber.FocusedNode=nil then Exit;

node:=VSTreeSPnumber.FocusedNode;
Column:=VSTreeSPnumber.FocusedColumn;

VSTreeSPnumber.EditNode(node,Column);
end;

TTestNumberForm版本：

procedure TTestNumberForm.VSTreeTestNumberClick(Sender: TObject);
var
Column:TColumnIndex;
node:PVirtualNode;
begin
if VSTreeTestNumber.FocusedNode=nil then Exit;

node:=VSTreeTestNumber.FocusedNode;
Column:=VSTreeTestNumber.FocusedColumn;

VSTreeTestNumber.EditNode(node,Column);
end;

3.实现virtualStringtree的ONCreateEditor事件：
功能：如果editnode被调用，则执行此函数；之前设置editDelay:0，是为避免在不允许改动的node上出现editor

TMMSLibraryForm版本：

procedure TMMSLibraryForm.DataTreeCreateEditor(Sender: TBaseVirtualTree;
Node: PVirtualNode; Column: TColumnIndex; out EditLink: IVTEditLink);
begin
EditLink:=TStringEditLink.create('''''''',stringlist[node.index * 5 Column])
end;

TSPNumbersForm版本：

procedure TSPNumbersForm.VSTreeSPnumberCreateEditor(
Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex;
out EditLink: IVTEditLink);
begin
EditLink:=TStringEditLink.create('''''''',stringlist[node.index * 7 Column]);
end;

TTestNumberForm版本：

procedure TTestNumberForm.VSTreeTestNumberCreateEditor(
Sender: TBaseVirtualTree; Node: PVirtualNode; Column: TColumnIndex;
out EditLink: IVTEditLink);
begin
EditLink:=TStringEditLink.create('''''''',stringlist[node.index * 4 Column]);
end;

4.实现virtualStringtree的ONNewText事件：
功能：根据获取焦点的node的column，判断值的合法性，并同时更新数据库和stringlist

TMMSLibraryForm版本：

procedure TMMSLibraryForm.DataTreeNewText(Sender: TBaseVirtualTree;
Node: PVirtualNode; Column: TColumnIndex; NewText: WideString);
var
sql:string;
begin
case Column of
0:
begin
if (StrToInt64Def(Trim(NewText),-1)=-1) then
begin
ShowMessage(''''"'''' Trim(NewText) ''''"'''' ''''does not represent a valid number!'''');
Exit;
end;

sql:=''''update mmslibrary set MMS_ID='''' Trim(NewText) '''' where MMS_ID='''' Stringlist.strings[node.Index*5];

end;

1:
sql:=''''update mmslibrary set MMS_Type="'''' Trim(NewText) ''''" where MMS_ID='''' Stringlist.strings[node.Index*5];

2:
sql:=''''update mmslibrary set MMS_Smil="'''' Trim(NewText) ''''" where MMS_ID='''' Stringlist.strings[node.Index*5];

4:
sql:=''''update mmslibrary set MMS_Subject="'''' Trim(NewText) ''''" where MMS_ID='''' Stringlist.strings[node.Index*5];

end;

if currentdatabase.ExecuteSqlNoQurey(sql)= 1 then
ShowMessage(''''Save to Database sucessfully!'''')
else
ShowMessage(''''Error occurs while Saving to Database!'''');

Stringlist.strings[node.Index*5 Column]:=Trim(NewText);

DataTree.RootNodeCount:=stringlist.Count div 5 ;
DataTree.Refresh;
end;

TSPNumbersForm版本：

procedure TSPNumbersForm.VSTreeSPnumberNewText(Sender: TBaseVirtualTree;
Node: PVirtualNode; Column: TColumnIndex; NewText: WideString);
var
sql:string;
begin
case Column of
0:
begin
if (StrToInt64Def(Trim(NewText),-1)=-1) then
begin
ShowMessage(''''"'''' Trim(NewText) ''''"'''' ''''does not represent a valid number!'''');
Exit;
end;

sql:=''''update spnumbers set SP_SPID='''' Trim(NewText) '''' where SP_SPID='''' Stringlist.strings[node.Index*7];
end;
1:
sql:=''''update spnumbers set SP_Name="'''' Trim(NewText) ''''" where SP_SPID='''' Stringlist.strings[node.Index*7];

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