5.IMS的事件生成过程_时序图.txt

@startuml

'请先安装PlantUML plugin查看该uml


title __IMS的事件生成过程__


entity EventHub
entity InputReader
database Queue
entity InputDispatcher

entity InputMonitor
entity WindowManagerService as wms
entity "ViewRootImpl中的\n WindowInputEventReceiver" as InputEventReceiver
'WindowInputEventReceiver 是ViewRootImpl的内部类，
entity DecorView

hnote over Queue#ccffe5:事件缓存队列
hnote over wms#ccffe5:下一步：\n事件分发到Activity

EventHub -> EventHub: 读取/dev/input/下的设备文件
activate EventHub
deactivate EventHub

group InputReaderThread
    InputReader -> InputReader: loopOnce()
    activate InputReader
        InputReader -> EventHub: getEvents()
        InputReader -> Queue: 事件入队
    deactivate InputReader

    activate Queue#ccffe5
end


wms -> InputMonitor: updateInputWindowsLw()\n更新焦点窗口
group InputDispatcherThread

    InputDispatcher ->InputDispatcher: dispatchOnce()
    activate InputDispatcher
        InputDispatcher -> Queue: 读取事件
        deactivate Queue

        InputDispatcher -> InputDispatcher :事件预处理\n1.repeatCount\n2.交给wms处理\n3.忽略
        activate InputDispatcher
        deactivate InputDispatcher

        InputDispatcher -> InputDispatcher: findFocusedWindowTargetsLocked()
        activate InputDispatcher
                InputDispatcher -> InputMonitor: 查询当前焦点窗口
                activate InputMonitor
                    InputMonitor --> InputDispatcher
                deactivate InputMonitor
        deactivate InputDispatcher



        InputDispatcher -> InputMonitor: dispatchEventLocked()\n分发事件给当前焦点窗口
    deactivate InputDispatcher
end

InputMonitor -> InputEventReceiver:通过InputChannel的socket通知
InputEventReceiver -> DecorView:经过各层责任链InputStage\n最终到DecoerView
@enduml