treeform.pas

Delphi7从入门到精通及附书源码 Delphi7从入门到精通及附书源码

unit TreeForm;

interface

uses
  SysUtils, Windows, Messages, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls, ComCtrls, Menus;

type
  TForm1 = class(TForm)
    TreeView1: TTreeView;
    MainMenu1: TMainMenu;
    Options1: TMenuItem;
    File1: TMenuItem;
    Exit1: TMenuItem;
    Help1: TMenuItem;
    About1: TMenuItem;
    Root1: TMenuItem;
    Buttons1: TMenuItem;
    Lines1: TMenuItem;
    N1: TMenuItem;
    Font1: TMenuItem;
    FontDialog1: TFontDialog;
    ExpandAll1: TMenuItem;
    N2: TMenuItem;
    procedure FormCreate(Sender: TObject);
    procedure About1Click(Sender: TObject);
    procedure Root1Click(Sender: TObject);
    procedure Buttons1Click(Sender: TObject);
    procedure Lines1Click(Sender: TObject);
    procedure Exit1Click(Sender: TObject);
    procedure Font1Click(Sender: TObject);
    procedure TreeView1DragOver(Sender, Source: TObject; X, Y: Integer;
      State: TDragState; var Accept: Boolean);
    procedure TreeView1DragDrop(Sender, Source: TObject; X, Y: Integer);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure TreeView1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure ExpandAll1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.FormCreate(Sender: TObject);
begin
  TreeView1.LoadFromFile (
    ExtractFilePath (Application.ExeName) + 'TreeText.txt');
end;

procedure TForm1.About1Click(Sender: TObject);
begin
  MessageDlg ('DragTree Example'#13'by Marco Cant