实现在virtualStringtree中编辑的标准步骤

王朝delphi·作者佚名  2006-01-10
窄屏简体版  字體: |||超大  

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];

2:

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

3:

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

4:

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

5:

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

6:

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

end;

if currentdatabase.ExecuteSqlNoQurey(sql)= 1 then

ShowMessage('Save to Database sucessfully!')

else

ShowMessage('Error occurs while Saving to Database!');

Stringlist.strings[node.Index*7+Column]:=Trim(NewText);

VSTreeSPnumber.RootNodeCount:=stringlist.Count div 7 ;

VSTreeSPnumber.Refresh;

end;

TTestNumberForm版本:

procedure TTestNumberForm.VSTreeTestNumberNewText(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 testnumbers set TN_MSISDN='+Trim(NewText)+' where TN_MSISDN='+Stringlist.strings[node.Index*4];

end;

1:

sql:='update testnumbers set TN_Imsi="'+Trim(NewText)+'" where TN_MSISDN='+Stringlist.strings[node.Index*4];

2:

sql:='update testnumbers set TN_Location="'+Trim(NewText)+'" where TN_MSISDN='+Stringlist.strings[node.Index*4];

3:

sql:='update testnumbers set TN_Description="'+Trim(NewText)+'" where TN_MSISDN='+Stringlist.strings[node.Index*4];

end;

if currentdatabase.ExecuteSqlNoQurey(sql)= 1 then

ShowMessage('Save to Database sucessfully!')

else

ShowMessage('Error occurs while Saving to Database!');

Stringlist.strings[node.Index*4+Column]:=Trim(NewText);

VSTreeTestNumber.RootNodeCount:=stringlist.Count div 4 ;

VSTreeTestNumber.Refresh;

end;

 
 
 
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