package main

import (
	"fmt"
)

type WinComponent interface {
	Print()
}

type WinLeaf struct {
	Type string
	Name string
}

func (w *WinLeaf) Print() {
	fmt.Printf("print %s(%s)\n", w.Type, w.Name)
}

type WinComposite struct {
	WinLeaf
	list []WinComponent
}

func (w *WinComposite) Register(c WinComponent) {
	w.list = append(w.list, c)
}

func (w *WinComposite) Print() {
	w.WinLeaf.Print()
	for _, c := range w.list {
		c.Print()
	}
}

type TextBox struct {
	WinLeaf
}

func (l *TextBox) Print() {
	l.Type = "TextBox"
	l.WinLeaf.Print()
}

type PasswdBox struct {
	WinLeaf
}

func (l *PasswdBox) Print() {
	l.Type = "PasswordBox"
	l.WinLeaf.Print()
}

type CheckBox struct {
	WinLeaf
}

func (l *CheckBox) Print() {
	l.Type = "CheckBox"
	l.WinLeaf.Print()
}

type Label struct {
	WinLeaf
}

func (l *Label) Print() {
	l.Type = "Label"
	l.WinLeaf.Print()
}

type LinkLabel struct {
	WinLeaf
}

func (l *LinkLabel) Print() {
	l.Type = "LinkLabel"
	l.WinLeaf.Print()
}

type Picture struct {
	WinLeaf
}

func (l *Picture) Print() {
	l.Type = "Picture"
	l.WinLeaf.Print()
}

type Frame struct {
	WinComposite
}

func (l *Frame) Print() {
	l.Type = "Frame"
	l.WinComposite.Print()
}

type Button struct {
	WinLeaf
}

func (l *Button) Print() {
	l.Type = "Button"
	l.WinLeaf.Print()
}

type WinForm struct {
	WinComposite
}

func (l *WinForm) Print() {
	l.Type = "WinForm"
	l.WinComposite.Print()
}

func main() {
	logo := &Picture{}
	logo.Name = "LOGO图片"

	frame := &Frame{}
	frame.Name = "FRAME1"

	username := &Label{}
	username.Name = "用户名"
	frame.Register(username)

	usernameBox := &TextBox{}
	usernameBox.Name = "文本框"
	frame.Register(usernameBox)

	passwd := &Label{}
	passwd.Name = "密码"
	frame.Register(passwd)

	passwdBox := &PasswdBox{}
	passwdBox.Name = "密码框"
	frame.Register(passwdBox)

	checkBox := &CheckBox{}
	checkBox.Name = "复选框"
	frame.Register(checkBox)

	rememberUser := &Label{}
	rememberUser.Name = "记住用户名"
	frame.Register(rememberUser)

	forgotPasswd := &LinkLabel{}
	forgotPasswd.Name = "忘记密码"
	frame.Register(forgotPasswd)

	login := &Button{}
	login.Name = "登录"

	register := &Button{}
	register.Name = "注册"

	win := &WinForm{}
	win.Name = "WINDOW窗口"
	win.Register(logo)
	win.Register(login)
	win.Register(register)
	win.Register(frame)
	win.Print()
}