example

Documentation

Index

• type ConcreteStateA
  • func (cs *ConcreteStateA) Off(m *Context)
  • func (cs *ConcreteStateA) On(m *Context)
• type ConcreteStateB
  • func (cs *ConcreteStateB) Off(m *Context)
  • func (cs *ConcreteStateB) On(m *Context)
• type Context
  • func NewContext() *Context
  • func (c *Context) ChangeState(s State)
  • func (c *Context) Off()
  • func (c *Context) On()
• type State
  • func NewConcreteStateA() State
  • func NewConcreteStateB() State

Types

type ConcreteStateA

type ConcreteStateA struct {
	// contains filtered or unexported fields
}

ConcreteStateA 描述了打开按钮的状态

func (*ConcreteStateA) Off

func (cs *ConcreteStateA) Off(m *Context)

将状态从打开切换到关闭

func (*ConcreteStateA) On

func (cs *ConcreteStateA) On(m *Context)

具体状态A的打开方法

type ConcreteStateB

type ConcreteStateB struct {
	// contains filtered or unexported fields
}

ConcreteStateB 描述关闭按钮状态

func (*ConcreteStateB) Off

func (cs *ConcreteStateB) Off(m *Context)

具体状态B的关闭方法

func (*ConcreteStateB) On

func (cs *ConcreteStateB) On(m *Context)

将状态从关闭切换到打开

type Context

type Context struct {
	// contains filtered or unexported fields
}

上下文定义了可以打开和关闭的状态

func NewContext

func NewContext() *Context

初始化上下文

func (*Context) ChangeState

func (c *Context) ChangeState(s State)

ChangeState 设置上下文的当前状态

func (*Context) Off

func (c *Context) Off()

按下关闭按钮

func (*Context) On

func (c *Context) On()

按下打开按钮

type State

type State interface {
	On(m *Context)
	Off(m *Context)
}

描述了上下文的内部状态

func NewConcreteStateA

func NewConcreteStateA() State

创建一个新的具体状态A

func NewConcreteStateB

func NewConcreteStateB() State

NewConcreteStateB 创建一个新的具体状态B