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[code=Delphi(Pascal)]
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ComCtrls, Menus;
type
TAInfo = class
private
FID: integer;
FPId: integer;
FName: String;
public
constructor Create ; overload ;
constructor Create(id:integer; pId :integer; name :String ) ; overload ;
public
property ID :integer read FID write FID ;
property PId :integer read FPId write FPId ;
property Name :String read FName write FName ;
end;
TForm1 = class(TForm)
tv1: TTreeView;
pm1: TPopupMenu;
N1: TMenuItem;
procedure FormCreate(Sender: TObject);
procedure N1Click(Sender: TObject);
procedure tv1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
var
Node :TTreeNode ;
info :TAInfo ;
begin
tv1.Items.BeginUpdate ;
tv1.Items.Clear ;
tv1.Items.EndUpdate ;
info := TAInfo.Create(1,0,'开发部');
Node := tv1.Items.Add(nil, info.Name) ; //1
Node.Data := info ; //2
// 1和2 可以用下面语句代替
// Node := tv1.Items.AddObject(nil, info.Name, info) ;
end;
{ TAInfo }
constructor TAInfo.Create;
begin
self.FID := 0 ;
self.FPId := -1 ;
self.FName := '' ;
end;
constructor TAInfo.Create(id, pId: integer; name: String);
begin
self.FID := id ;
self.FPId := pId ;
self.FName := name ;
end;
procedure TForm1.N1Click(Sender: TObject);
function getPNodeCount(): integer ;//得到根节点数
var
i:integer ;
cnt :integer ;
begin
cnt := 0 ;
for i := 0 to tv1.Items.Count -1 do
begin
if (tv1.Items.Item[i].Level = 0 ) then
begin
cnt := cnt + 1 ;
end;
end;
Result := cnt ;
end;
var
Node :TTreeNode ;
id , pId :integer ;
info ,addInfo :TAInfo ;
begin
if tv1.Selected <> nil then //有选中节点
begin
info := TAInfo(tv1.Selected.Data) ;
addInfo := TAInfo.Create ;
addInfo.ID := tv1.Selected.Count+1 ;
addInfo.PId := info.ID ;//增加的节点的PID应该为选中的节点ID
addInfo.Name := tv1.Selected.Text + '_' + IntToStr(addInfo.ID) ;
Node := tv1.Items.AddChild(tv1.Selected, addInfo.Name) ; //1
Node.Data := addInfo ; //2
// 1和2 可以用下面语句代替
// Node := tv1.Items.AddChildObject(tv1.Selected, addInfo.Name, addInfo) ;
end //没有选中节点，则增加根目录
else
begin
//因为没有实际数据，所以写了一个getPNodeCount
id := getPNodeCount() ;
addInfo := TAInfo.Create(id, 0 , '新增_' + IntToStr(id));
Node := tv1.Items.Add(nil, addInfo.Name) ; //1
Node.Data := addInfo ; //2
// 1和2 可以用下面语句代替
// Node := tv1.Items.AddObject(nil, addInfo.Name, addInfo) ;
end;
end;
procedure TForm1.tv1MouseDown(Sender: TObject; Button: TMouseButton;
Shift: TShiftState; X, Y: Integer);
var
s_dir: string;
node: TTreeNode;
begin
if Button = mbRight then
begin
tv1.Selected := tv1.GetNodeAt(X, Y); //确保在需要添加子节点的节点上面右键
end;
end ;
end.
[code]
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