unit MainUnit;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  Menus, ShellAPI, ExtCtrls;

const
  ICON_ID= 1;
  MI_ICONEVENT= WM_USER+ 1;

type
  TMainForm = class(TForm)
    PopupMenu1: TPopupMenu;
    N1: TMenuItem;
    N2: TMenuItem;
    N3: TMenuItem;
    procedure FormCreate(Sender: TObject);
    procedure FormClose(Sender: TObject; var Action: TCloseAction);
    procedure FormActivate(Sender: TObject);
    procedure N1Click(Sender: TObject);
    procedure N2Click(Sender: TObject);
    procedure N3Click(Sender: TObject);
  private
    procedure SetupIcon;  //在托盤中安裝圖標
    procedure ChangeIcon(s: Boolean);  //改變托盤中的圖標
    procedure FreeIcon; //在托盤中釋放圖標
    procedure IconOnClick(var Msg: TMessage); message MI_ICONEVENT; //托盤圖標電擊事件
    { Private declarations }
  public
    { Public declarations }
  end;

var
  MainForm: TMainForm;
  NormalIcon, DisabledIcon: TIcon; //正常和失效情況下的圖標
  Status: Boolean; //標志是“使用狀態(tài)”還是“禁用狀態(tài)”
  Apath: String;
implementation

uses ShowUnit;

{$R *.DFM}
procedure TMainForm.SetupIcon;
var
  IconData: TNotifyIcondata;
begin
  NormalIcon:= TIcon.Create;
  DisabledIcon:= TIcon.Create;
  NormalIcon.LoadFromFile(Apath+ '1.ico');
  DisabledIcon.LoadFromFile(Apath+ '2.ico');
  IconData.cbSize:= SizeOf(IconData);
  IconData.Wnd:= Handle;
  IconData.uID:= Icon_ID;
  IconData.uFlags:= NIF_ICON or NIF_MESSAGE or NIF_TIP;
  IconData.uCallbackMessage:= MI_ICONEVENT;
  IconData.hIcon:= NormalIcon.Handle;
  IconData.szTip:= '新增托盤圖標';
  Shell_NotifyIcon(NIM_ADD, @IconData);
end;

procedure TMainForm.ChangeIcon(s: Boolean);
var
  IconData: TNotifyIconData;
begin
  IconData.cbSize:= SizeOf(IconData);
  IconData.Wnd:= Handle;
  IconData.uID:= Icon_ID;
  if s= False then
    begin
      IconData.hIcon:= DisabledIcon.Handle;
      Status:= False;
      N1.Enabled:= False;
    end
  else
    begin
      IconData.hIcon:= NormalIcon.Handle;
      Status:= True;
      N1.Enabled:= True;
    end;
  IconData.uFlags:= NIF_ICON;
  Shell_NotifyIcon(NIM_MODIFY, @IconData);
end;

procedure TMainForm.FreeIcon;
var
  IconData: TNotifyIconData;
begin
  IconData.cbSize:= SizeOf(IconData);
  IconData.Wnd:= Handle;
  IconData.uID:= Icon_ID;
  Shell_NotifyIcon(NIM_DELETE, @IconData);

end;

procedure TMainForm.IconOnClick;
var
  pt: TPoint;
begin
  if (Msg.LParam= WM_LBUTTONDOWN) and (Status= True) then
    ShowForm.Show;
  if  (Msg.LParam= WM_RBUTTONDOWN) then
    begin
      GetCursorPos(pt);
      PopupMenu1.Popup(pt.x, pt.y);
    end;
end;

procedure TMainForm.FormCreate(Sender: TObject);
begin
  Apath:= ExtractFilePath(ParamStr(0));
  Status:= True;
  SetupIcon;
  ChangeIcon(True);
  ShowWindow(Application.Handle, SW_HIDE);
  SetWindowLong(Application.Handle, GWL_EXSTYLE, WS_EX_TOOLWINDOW);
end;

procedure TMainForm.FormClose(Sender: TObject; var Action: TCloseAction);
begin
  FreeIcon;
  NormalIcon.Free;
  DisabledIcon.Free;
  
end;

procedure TMainForm.FormActivate(Sender: TObject);
begin
  MainForm.Width:= 0;
  MainForm.Height:= 0;
  ShowWindow(Application.Handle, SW_HIDE);
end;

procedure TMainForm.N1Click(Sender: TObject);
begin
  ShowForm.Show;
end;

procedure TMainForm.N2Click(Sender: TObject);
begin
  if Status= True then
    begin
      ChangeIcon(False);
      N2.Caption:= '使用';
    end
  else
    begin
      ChangeIcon(True);
      N2.Caption:= '禁用';
    end;
end;

procedure TMainForm.N3Click(Sender: TObject);
begin
  Close;
end;

end.